Improved ninja parsing and animation.

src/bin_data/loading/entities.ts

@@ -1,31 +1,32 @@
 import { BufferGeometry } from 'three';
 import { NpcType, ObjectType } from '../../domain';
-import { getNpcData, getObjectData } from './binaryAssets';
+import { ninja_object_to_buffer_geometry } from '../../rendering/models';
 import { BufferCursor } from '../BufferCursor';
 import { parse_nj, parse_xj } from '../parsing/ninja';
+import { getNpcData, getObjectData } from './binaryAssets';
 
 const npc_cache: Map<string, Promise<BufferGeometry>> = new Map();
 const object_cache: Map<string, Promise<BufferGeometry>> = new Map();
 
 export function get_npc_geometry(npc_type: NpcType): Promise<BufferGeometry> {
-    let geometry = npc_cache.get(String(npc_type.id));
+    let mesh = npc_cache.get(String(npc_type.id));
 
-    if (geometry) {
+    if (mesh) {
-        return geometry;
+        return mesh;
     } else {
-        geometry = getNpcData(npc_type).then(({ url, data }) => {
+        mesh = getNpcData(npc_type).then(({ url, data }) => {
             const cursor = new BufferCursor(data, true);
-            const object_3d = url.endsWith('.nj') ? parse_nj(cursor) : parse_xj(cursor);
+            const nj_objects = url.endsWith('.nj') ? parse_nj(cursor) : parse_xj(cursor);
 
-            if (object_3d) {
+            if (nj_objects.length) {
-                return object_3d;
+                return ninja_object_to_buffer_geometry(nj_objects[0]);
             } else {
-                throw new Error('File could not be parsed into a BufferGeometry.');
+                throw new Error(`Could not parse ${url}.`);
             }
         });
 
-        npc_cache.set(String(npc_type.id), geometry);
+        npc_cache.set(String(npc_type.id), mesh);
-        return geometry;
+        return mesh;
     }
 }
 
@@ -37,10 +38,10 @@ export function get_object_geometry(object_type: ObjectType): Promise<BufferGeom
     } else {
         geometry = getObjectData(object_type).then(({ url, data }) => {
             const cursor = new BufferCursor(data, true);
-            const object_3d = url.endsWith('.nj') ? parse_nj(cursor) : parse_xj(cursor);
+            const nj_objects = url.endsWith('.nj') ? parse_nj(cursor) : parse_xj(cursor);
 
-            if (object_3d) {
+            if (nj_objects.length) {
-                return object_3d;
+                return ninja_object_to_buffer_geometry(nj_objects[0]);
             } else {
                 throw new Error('File could not be parsed into a BufferGeometry.');
             }

src/bin_data/parsing/ninja/index.ts

@@ -1,31 +1,52 @@
-import {
-    BufferAttribute,
-    BufferGeometry,
-    Euler,
-    Matrix4,
-    Quaternion,
-    Vector3
-} from 'three';
 import { BufferCursor } from '../../BufferCursor';
-import { parse_nj_model, NjContext } from './nj';
+import { parse_nj_model, NjModel } from './nj';
-import { parse_xj_model, XjContext } from './xj';
+import { parse_xj_model, XjModel } from './xj';
+import { Vec3 } from '../../../domain';
 
 // TODO:
 // - deal with multiple NJCM chunks
 // - deal with other types of chunks
 
-export function parse_nj(cursor: BufferCursor): BufferGeometry | undefined {
+const ANGLE_TO_RAD = 2 * Math.PI / 65536;
-    return parse_ninja(cursor, 'nj');
+
+export type NinjaVertex = {
+    position: Vec3,
+    normal?: Vec3,
 }
 
-export function parse_xj(cursor: BufferCursor): BufferGeometry | undefined {
+export type NinjaModel = NjModel | XjModel;
-    return parse_ninja(cursor, 'xj');
+
+export type NinjaObject<M extends NinjaModel> = {
+    evaluation_flags: {
+        no_translate: boolean,
+        no_rotate: boolean,
+        no_scale: boolean,
+        hidden: boolean,
+        break_child_trace: boolean,
+        zxy_rotation_order: boolean,
+        eval_skip: boolean,
+        eval_shape_skip: boolean,
+    },
+    model?: M,
+    position: Vec3,
+    rotation: Vec3, // Euler angles in radians.
+    scale: Vec3,
+    children: NinjaObject<M>[],
 }
 
-type Format = 'nj' | 'xj';
+export function parse_nj(cursor: BufferCursor): NinjaObject<NjModel>[] {
-type Context = NjContext | XjContext;
+    return parse_ninja(cursor, parse_nj_model, []);
+}
 
-function parse_ninja(cursor: BufferCursor, format: Format): BufferGeometry | undefined {
+export function parse_xj(cursor: BufferCursor): NinjaObject<XjModel>[] {
+    return parse_ninja(cursor, parse_xj_model, undefined);
+}
+
+function parse_ninja<M extends NinjaModel>(
+    cursor: BufferCursor,
+    parse_model: (cursor: BufferCursor, context: any) => M,
+    context: any
+): NinjaObject<M>[] {
     while (cursor.bytes_left) {
         // Ninja uses a little endian variant of the IFF format.
         // IFF files contain chunks preceded by an 8-byte header.
@@ -34,44 +55,21 @@ function parse_ninja(cursor: BufferCursor, format: Format): BufferGeometry | und
         const iff_chunk_size = cursor.u32();
 
         if (iff_type_id === 'NJCM') {
-            return parse_njcm(cursor.take(iff_chunk_size), format);
+            return parse_sibling_objects(cursor.take(iff_chunk_size), parse_model, context);
         } else {
             cursor.seek(iff_chunk_size);
         }
     }
+
+    return [];
 }
 
-function parse_njcm(cursor: BufferCursor, format: Format): BufferGeometry | undefined {
+// TODO: cache model and object offsets so we don't reparse the same data.
-    if (cursor.bytes_left) {
+function parse_sibling_objects<M extends NinjaModel>(
-        let context: Context;
-
-        if (format === 'nj') {
-            context = {
-                format,
-                positions: [],
-                normals: [],
-                cached_chunk_offsets: [],
-                vertices: []
-            };
-        } else {
-            context = {
-                format,
-                positions: [],
-                normals: [],
-                indices: []
-            };
-        }
-
-        parse_sibling_objects(cursor, new Matrix4(), context);
-        return create_buffer_geometry(context);
-    }
-}
-
-function parse_sibling_objects(
     cursor: BufferCursor,
-    parent_matrix: Matrix4,
+    parse_model: (cursor: BufferCursor, context: any) => M,
-    context: Context
+    context: any
-): void {
+): NinjaObject<M>[] {
     const eval_flags = cursor.u32();
     const no_translate = (eval_flags & 0b1) !== 0;
     const no_rotate = (eval_flags & 0b10) !== 0;
@@ -79,61 +77,62 @@ function parse_sibling_objects(
     const hidden = (eval_flags & 0b1000) !== 0;
     const break_child_trace = (eval_flags & 0b10000) !== 0;
     const zxy_rotation_order = (eval_flags & 0b100000) !== 0;
+    const eval_skip = (eval_flags & 0b1000000) !== 0;
+    const eval_shape_skip = (eval_flags & 0b1000000) !== 0;
 
     const model_offset = cursor.u32();
     const pos_x = cursor.f32();
     const pos_y = cursor.f32();
     const pos_z = cursor.f32();
-    const rotation_x = cursor.i32() * (2 * Math.PI / 0xFFFF);
+    const rotation_x = cursor.i32() * ANGLE_TO_RAD;
-    const rotation_y = cursor.i32() * (2 * Math.PI / 0xFFFF);
+    const rotation_y = cursor.i32() * ANGLE_TO_RAD;
-    const rotation_z = cursor.i32() * (2 * Math.PI / 0xFFFF);
+    const rotation_z = cursor.i32() * ANGLE_TO_RAD;
     const scale_x = cursor.f32();
     const scale_y = cursor.f32();
     const scale_z = cursor.f32();
     const child_offset = cursor.u32();
     const sibling_offset = cursor.u32();
 
-    const rotation = new Euler(rotation_x, rotation_y, rotation_z, zxy_rotation_order ? 'ZXY' : 'ZYX');
+    let model: M | undefined;
-    const matrix = new Matrix4()
+    let children: NinjaObject<M>[];
-        .compose(
+    let siblings: NinjaObject<M>[];
-            no_translate ? new Vector3() : new Vector3(pos_x, pos_y, pos_z),
-            no_rotate ? new Quaternion(0, 0, 0, 1) : new Quaternion().setFromEuler(rotation),
-            no_scale ? new Vector3(1, 1, 1) : new Vector3(scale_x, scale_y, scale_z)
-        )
-        .premultiply(parent_matrix);
 
-    if (model_offset && !hidden) {
+    if (model_offset) {
         cursor.seek_start(model_offset);
-        parse_model(cursor, matrix, context);
+        model = parse_model(cursor, context);
     }
 
-    if (child_offset && !break_child_trace) {
+    if (child_offset) {
         cursor.seek_start(child_offset);
-        parse_sibling_objects(cursor, matrix, context);
+        children = parse_sibling_objects(cursor, parse_model, context);
+    } else {
+        children = [];
     }
 
     if (sibling_offset) {
         cursor.seek_start(sibling_offset);
-        parse_sibling_objects(cursor, parent_matrix, context);
+        siblings = parse_sibling_objects(cursor, parse_model, context);
-    }
-}
-
-function create_buffer_geometry(context: Context): BufferGeometry {
-    const geometry = new BufferGeometry();
-    geometry.addAttribute('position', new BufferAttribute(new Float32Array(context.positions), 3));
-    geometry.addAttribute('normal', new BufferAttribute(new Float32Array(context.normals), 3));
-
-    if ('indices' in context) {
-        geometry.setIndex(new BufferAttribute(new Uint16Array(context.indices), 1));
-    }
-
-    return geometry;
-}
-
-function parse_model(cursor: BufferCursor, matrix: Matrix4, context: Context): void {
-    if (context.format === 'nj') {
-        parse_nj_model(cursor, matrix, context);
     } else {
-        parse_xj_model(cursor, matrix, context);
+        siblings = [];
     }
+
+    const object: NinjaObject<M> = {
+        evaluation_flags: {
+            no_translate,
+            no_rotate,
+            no_scale,
+            hidden,
+            break_child_trace,
+            zxy_rotation_order,
+            eval_skip,
+            eval_shape_skip,
+        },
+        model,
+        position: new Vec3(pos_x, pos_y, pos_z),
+        rotation: new Vec3(rotation_x, rotation_y, rotation_z),
+        scale: new Vec3(scale_x, scale_y, scale_z),
+        children,
+    };
+
+    return [object, ...siblings];
 }

src/bin_data/parsing/ninja/motion.ts

@@ -101,13 +101,8 @@ function parse_motion(cursor: BufferCursor): NjMotion {
     const motion_data_list = [];
 
     // The mdata array stops where the motion structure starts.
-    while (true) {
+    while (mdata_offset < motion_offset) {
         cursor.seek_start(mdata_offset);
-
-        if (cursor.position >= motion_offset) {
-            break;
-        }
-
         mdata_offset = mdata_offset += 8 * element_count;
 
         let motion_data: NjMotionData = {

src/bin_data/parsing/ninja/nj.ts

@@ -1,63 +1,120 @@
-import { Matrix3, Matrix4, Vector3 } from 'three';
-import { BufferCursor } from '../../BufferCursor';
 import Logger from 'js-logger';
+import { BufferCursor } from '../../BufferCursor';
+import { Vec3 } from '../../../domain';
+import { NinjaVertex } from '.';
 
 const logger = Logger.get('bin_data/parsing/ninja/nj');
 
 // TODO:
-// - deal with multiple NJCM chunks
-// - deal with other types of chunks
 // - textures
 // - colors
 // - bump maps
 // - animation
 // - deal with vertex information contained in triangle strips
 
-export interface NjContext {
+export type NjModel = {
-    format: 'nj';
+    type: 'nj',
-    positions: number[];
+    /**
-    normals: number[];
+     * Sparse array of vertices.
-    cached_chunk_offsets: number[];
+     */
-    vertices: { position: Vector3, normal: Vector3 }[];
+    vertices: NinjaVertex[],
+    meshes: NjTriangleStrip[],
+    // materials: [],
+    bounding_sphere_center: Vec3,
+    bounding_sphere_radius: number,
 }
 
-interface Node {
+enum NjChunkType {
-    vertices: { position: Vector3, normal: Vector3 }[];
+    Unknown, Null, Bits, CachePolygonList, DrawPolygonList, Tiny, Material, Vertex, Volume, Strip, End
-    indices: number[];
-    parent?: Node;
-    children: Node[];
 }
 
-interface ChunkVertex {
+type NjChunk = {
-    index: number;
+    type: NjChunkType,
-    position: [number, number, number];
+    type_id: number,
-    normal?: [number, number, number];
+} & (NjUnknownChunk | NjNullChunk | NjBitsChunk | NjCachePolygonListChunk | NjDrawPolygonListChunk | NjTinyChunk | NjMaterialChunk | NjVertexChunk | NjVolumeChunk | NjStripChunk | NjEndChunk)
+
+type NjUnknownChunk = {
+    type: NjChunkType.Unknown,
 }
 
-interface ChunkTriangleStrip {
+type NjNullChunk = {
-    clockwise_winding: boolean;
+    type: NjChunkType.Null,
-    indices: number[];
 }
 
-export function parse_nj_model(cursor: BufferCursor, matrix: Matrix4, context: NjContext): void {
+type NjBitsChunk = {
-    const { positions, normals, cached_chunk_offsets, vertices } = context;
+    type: NjChunkType.Bits,
+}
 
+type NjCachePolygonListChunk = {
+    type: NjChunkType.CachePolygonList,
+    cache_index: number,
+    offset: number,
+}
+
+type NjDrawPolygonListChunk = {
+    type: NjChunkType.DrawPolygonList,
+    cache_index: number
+}
+
+type NjTinyChunk = {
+    type: NjChunkType.Tiny,
+}
+
+type NjMaterialChunk = {
+    type: NjChunkType.Material,
+}
+
+type NjVertexChunk = {
+    type: NjChunkType.Vertex,
+    vertices: NjVertex[]
+}
+
+type NjVolumeChunk = {
+    type: NjChunkType.Volume,
+}
+
+type NjStripChunk = {
+    type: NjChunkType.Strip,
+    triangle_strips: NjTriangleStrip[]
+}
+
+type NjEndChunk = {
+    type: NjChunkType.End,
+}
+
+type NjVertex = {
+    index: number,
+    position: Vec3,
+    normal?: Vec3,
+}
+
+type NjTriangleStrip = {
+    clockwise_winding: boolean,
+    indices: number[],
+}
+
+export function parse_nj_model(cursor: BufferCursor, cached_chunk_offsets: number[]): NjModel {
     const vlist_offset = cursor.u32(); // Vertex list
     const plist_offset = cursor.u32(); // Triangle strip index list
-
+    const bounding_sphere_center = new Vec3(
-    const normal_matrix = new Matrix3().getNormalMatrix(matrix);
+        cursor.f32(),
+        cursor.f32(),
+        cursor.f32()
+    );
+    const bounding_sphere_radius = cursor.f32();
+    const vertices: NinjaVertex[] = [];
+    const meshes: NjTriangleStrip[] = [];
 
     if (vlist_offset) {
         cursor.seek_start(vlist_offset);
 
         for (const chunk of parse_chunks(cursor, cached_chunk_offsets, true)) {
-            if (chunk.chunk_type === 'VERTEX') {
+            if (chunk.type === NjChunkType.Vertex) {
-                const chunk_vertices: ChunkVertex[] = chunk.data;
+                for (const vertex of chunk.vertices) {
-
+                    vertices[vertex.index] = {
-                for (const vertex of chunk_vertices) {
+                        position: vertex.position,
-                    const position = new Vector3(...vertex.position).applyMatrix4(matrix);
+                        normal: vertex.normal
-                    const normal = vertex.normal ? new Vector3(...vertex.normal).applyMatrix3(normal_matrix) : new Vector3(0, 1, 0);
+                    };
-                    vertices[vertex.index] = { position, normal };
                 }
             }
         }
@@ -67,127 +124,132 @@ export function parse_nj_model(cursor: BufferCursor, matrix: Matrix4, context: N
         cursor.seek_start(plist_offset);
 
         for (const chunk of parse_chunks(cursor, cached_chunk_offsets, false)) {
-            if (chunk.chunk_type === 'STRIP') {
+            if (chunk.type === NjChunkType.Strip) {
-                for (const { clockwiseWinding, indices: stripIndices } of chunk.data) {
+                meshes.push(...chunk.triangle_strips);
-                    for (let j = 2; j < stripIndices.length; ++j) {
-                        const a = vertices[stripIndices[j - 2]];
-                        const b = vertices[stripIndices[j - 1]];
-                        const c = vertices[stripIndices[j]];
-
-                        if (a && b && c) {
-                            if (j % 2 === (clockwiseWinding ? 1 : 0)) {
-                                positions.splice(positions.length, 0, a.position.x, a.position.y, a.position.z);
-                                positions.splice(positions.length, 0, b.position.x, b.position.y, b.position.z);
-                                positions.splice(positions.length, 0, c.position.x, c.position.y, c.position.z);
-                                normals.splice(normals.length, 0, a.normal.x, a.normal.y, a.normal.z);
-                                normals.splice(normals.length, 0, b.normal.x, b.normal.y, b.normal.z);
-                                normals.splice(normals.length, 0, c.normal.x, c.normal.y, c.normal.z);
-                            } else {
-                                positions.splice(positions.length, 0, b.position.x, b.position.y, b.position.z);
-                                positions.splice(positions.length, 0, a.position.x, a.position.y, a.position.z);
-                                positions.splice(positions.length, 0, c.position.x, c.position.y, c.position.z);
-                                normals.splice(normals.length, 0, b.normal.x, b.normal.y, b.normal.z);
-                                normals.splice(normals.length, 0, a.normal.x, a.normal.y, a.normal.z);
-                                normals.splice(normals.length, 0, c.normal.x, c.normal.y, c.normal.z);
-                            }
-                        }
-                    }
-                }
-            }
             }
         }
     }
 
+    return {
+        type: 'nj',
+        vertices,
+        meshes,
+        bounding_sphere_center,
+        bounding_sphere_radius
+    };
+}
+
+// TODO: don't reparse when DrawPolygonList chunk is encountered.
 function parse_chunks(
     cursor: BufferCursor,
     cached_chunk_offsets: number[],
     wide_end_chunks: boolean
-): Array<{
+): NjChunk[] {
-    chunk_type: string,
+    const chunks: NjChunk[] = [];
-    chunk_sub_type: string | null,
-    chunk_type_id: number,
-    data: any
-}> {
-    const chunks = [];
     let loop = true;
 
     while (loop) {
-        const chunk_type_id = cursor.u8();
+        const type_id = cursor.u8();
         const flags = cursor.u8();
         const chunk_start_position = cursor.position;
-        let chunk_type = 'UNKOWN';
-        let chunk_sub_type = null;
-        let data = null;
         let size = 0;
 
-        if (chunk_type_id === 0) {
+        if (type_id === 0) {
-            chunk_type = 'NULL';
+            chunks.push({
-        } else if (1 <= chunk_type_id && chunk_type_id <= 5) {
+                type: NjChunkType.Null,
-            chunk_type = 'BITS';
+                type_id
-
+            });
-            if (chunk_type_id === 4) {
+        } else if (1 <= type_id && type_id <= 3) {
-                chunk_sub_type = 'CACHE_POLYGON_LIST';
+            chunks.push({
-                data = {
+                type: NjChunkType.Bits,
-                    store_index: flags,
+                type_id
-                    offset: cursor.position
+            });
-                };
+        } else if (type_id === 4) {
-                cached_chunk_offsets[data.store_index] = data.offset;
+            const cache_index = flags;
+            const offset = cursor.position;
+            chunks.push({
+                type: NjChunkType.CachePolygonList,
+                type_id,
+                cache_index,
+                offset
+            });
+            cached_chunk_offsets[cache_index] = offset;
             loop = false;
-            } else if (chunk_type_id === 5) {
+        } else if (type_id === 5) {
-                chunk_sub_type = 'DRAW_POLYGON_LIST';
+            const cache_index = flags;
-                data = {
+            const cached_offset = cached_chunk_offsets[cache_index];
-                    store_index: flags
+
-                };
+            if (cached_offset != null) {
-                cursor.seek_start(cached_chunk_offsets[data.store_index]);
+                cursor.seek_start(cached_offset);
                 chunks.push(
                     ...parse_chunks(cursor, cached_chunk_offsets, wide_end_chunks)
                 );
             }
-        } else if (8 <= chunk_type_id && chunk_type_id <= 9) {
+
-            chunk_type = 'TINY';
+            chunks.push({
+                type: NjChunkType.DrawPolygonList,
+                type_id,
+                cache_index
+            });
+        } else if (8 <= type_id && type_id <= 9) {
             size = 2;
-        } else if (17 <= chunk_type_id && chunk_type_id <= 31) {
+            chunks.push({
-            chunk_type = 'MATERIAL';
+                type: NjChunkType.Tiny,
+                type_id
+            });
+        } else if (17 <= type_id && type_id <= 31) {
             size = 2 + 2 * cursor.u16();
-        } else if (32 <= chunk_type_id && chunk_type_id <= 50) {
+            chunks.push({
-            chunk_type = 'VERTEX';
+                type: NjChunkType.Material,
+                type_id
+            });
+        } else if (32 <= type_id && type_id <= 50) {
             size = 2 + 4 * cursor.u16();
-            data = parse_chunk_vertex(cursor, chunk_type_id, flags);
+            chunks.push({
-        } else if (56 <= chunk_type_id && chunk_type_id <= 58) {
+                type: NjChunkType.Vertex,
-            chunk_type = 'VOLUME';
+                type_id,
+                vertices: parse_vertex_chunk(cursor, type_id, flags)
+            });
+        } else if (56 <= type_id && type_id <= 58) {
             size = 2 + 2 * cursor.u16();
-        } else if (64 <= chunk_type_id && chunk_type_id <= 75) {
+            chunks.push({
-            chunk_type = 'STRIP';
+                type: NjChunkType.Volume,
+                type_id
+            });
+        } else if (64 <= type_id && type_id <= 75) {
             size = 2 + 2 * cursor.u16();
-            data = parse_chunk_triangle_strip(cursor, chunk_type_id);
+            chunks.push({
-        } else if (chunk_type_id === 255) {
+                type: NjChunkType.Strip,
-            chunk_type = 'END';
+                type_id,
+                triangle_strips: parse_triangle_strip_chunk(cursor, type_id)
+            });
+        } else if (type_id === 255) {
             size = wide_end_chunks ? 2 : 0;
+            chunks.push({
+                type: NjChunkType.End,
+                type_id
+            });
             loop = false;
         } else {
-            // Ignore unknown chunks.
-            logger.warn(`Unknown chunk type: ${chunk_type_id}.`);
             size = 2 + 2 * cursor.u16();
+            chunks.push({
+                type: NjChunkType.Unknown,
+                type_id
+            });
+            logger.warn(`Unknown chunk type ${type_id} at offset ${chunk_start_position}.`);
         }
 
         cursor.seek_start(chunk_start_position + size);
-
-        chunks.push({
-            chunk_type,
-            chunk_sub_type,
-            chunk_type_id,
-            data
-        });
     }
 
     return chunks;
 }
 
-function parse_chunk_vertex(
+function parse_vertex_chunk(
     cursor: BufferCursor,
     chunk_type_id: number,
     flags: number
-): ChunkVertex[] {
+): NjVertex[] {
     // There are apparently 4 different sets of vertices, ignore all but set 0.
     if ((flags & 0b11) !== 0) {
         return [];
@@ -196,27 +258,27 @@ function parse_chunk_vertex(
     const index = cursor.u16();
     const vertex_count = cursor.u16();
 
-    const vertices: ChunkVertex[] = [];
+    const vertices: NjVertex[] = [];
 
     for (let i = 0; i < vertex_count; ++i) {
-        const vertex: ChunkVertex = {
+        const vertex: NjVertex = {
             index: index + i,
-            position: [
+            position: new Vec3(
                 cursor.f32(), // x
                 cursor.f32(), // y
                 cursor.f32(), // z
-            ]
+            )
         };
 
         if (chunk_type_id === 32) {
             cursor.seek(4); // Always 1.0
         } else if (chunk_type_id === 33) {
             cursor.seek(4); // Always 1.0
-            vertex.normal = [
+            vertex.normal = new Vec3(
                 cursor.f32(), // x
                 cursor.f32(), // y
                 cursor.f32(), // z
-            ];
+            );
             cursor.seek(4); // Always 0.0
         } else if (35 <= chunk_type_id && chunk_type_id <= 40) {
             if (chunk_type_id === 37) {
@@ -228,11 +290,11 @@ function parse_chunk_vertex(
                 cursor.seek(4);
             }
         } else if (41 <= chunk_type_id && chunk_type_id <= 47) {
-            vertex.normal = [
+            vertex.normal = new Vec3(
                 cursor.f32(), // x
                 cursor.f32(), // y
                 cursor.f32(), // z
-            ];
+            );
 
             if (chunk_type_id >= 42) {
                 if (chunk_type_id === 44) {
@@ -260,10 +322,10 @@ function parse_chunk_vertex(
     return vertices;
 }
 
-function parse_chunk_triangle_strip(
+function parse_triangle_strip_chunk(
     cursor: BufferCursor,
     chunk_type_id: number
-): ChunkTriangleStrip[] {
+): NjTriangleStrip[] {
     const user_offset_and_strip_count = cursor.u16();
     const user_flags_size = user_offset_and_strip_count >>> 14;
     const strip_count = user_offset_and_strip_count & 0x3FFF;
@@ -292,7 +354,7 @@ function parse_chunk_triangle_strip(
         parse_texture_coords_hires
     ] = options;
 
-    const strips = [];
+    const strips: NjTriangleStrip[] = [];
 
     for (let i = 0; i < strip_count; ++i) {
         const winding_flag_and_index_count = cursor.i16();

src/bin_data/parsing/ninja/xj.ts

@@ -1,5 +1,6 @@
-import { Matrix3, Matrix4, Vector3 } from 'three';
 import { BufferCursor } from '../../BufferCursor';
+import { Vec3 } from '../../../domain';
+import { NinjaVertex } from '.';
 
 // TODO:
 // - textures
@@ -7,16 +8,17 @@ import { BufferCursor } from '../../BufferCursor';
 // - bump maps
 // - animation
 
-export interface XjContext {
+export type XjModel = {
-    format: 'xj';
+    type: 'xj',
-    positions: number[];
+    vertices: NinjaVertex[],
-    normals: number[];
+    meshes: XjTriangleStrip[],
-    indices: number[];
 }
 
-export function parse_xj_model(cursor: BufferCursor, matrix: Matrix4, context: XjContext): void {
+export type XjTriangleStrip = {
-    const { positions, normals, indices } = context;
+    indices: number[],
+}
 
+export function parse_xj_model(cursor: BufferCursor): XjModel {
     cursor.seek(4); // Flags according to QEdit, seemingly always 0.
     const vertex_info_list_offset = cursor.u32();
     cursor.seek(4); // Seems to be the vertexInfoCount, always 1.
@@ -26,8 +28,11 @@ export function parse_xj_model(cursor: BufferCursor, matrix: Matrix4, context: X
     const triangle_strip_b_count = cursor.u32();
     cursor.seek(16); // Bounding sphere position and radius in floats.
 
-    const normal_matrix = new Matrix3().getNormalMatrix(matrix);
+    const model: XjModel = {
-    const index_offset = positions.length / 3;
+        type: 'xj',
+        vertices: [],
+        meshes: []
+    };
 
     if (vertex_info_list_offset) {
         cursor.seek_start(vertex_info_list_offset);
@@ -38,66 +43,55 @@ export function parse_xj_model(cursor: BufferCursor, matrix: Matrix4, context: X
 
         for (let i = 0; i < vertex_count; ++i) {
             cursor.seek_start(vertexList_offset + i * vertex_size);
-            const position = new Vector3(
+            const position = new Vec3(
                 cursor.f32(),
                 cursor.f32(),
                 cursor.f32()
-            ).applyMatrix4(matrix);
+            );
-            let normal;
+            let normal: Vec3 | undefined;
 
             if (vertex_size === 28 || vertex_size === 32 || vertex_size === 36) {
-                normal = new Vector3(
+                normal = new Vec3(
                     cursor.f32(),
                     cursor.f32(),
                     cursor.f32()
-                ).applyMatrix3(normal_matrix);
+                );
-            } else {
-                normal = new Vector3(0, 1, 0);
             }
 
-            positions.push(position.x);
+            model.vertices.push({ position, normal });
-            positions.push(position.y);
-            positions.push(position.z);
-            normals.push(normal.x);
-            normals.push(normal.y);
-            normals.push(normal.z);
         }
     }
 
     if (triangle_strip_list_a_offset) {
-        parse_triangle_strip_list(
+        model.meshes.push(
+            ...parse_triangle_strip_list(
                 cursor,
                 triangle_strip_list_a_offset,
-            triangle_strip_a_count,
+                triangle_strip_a_count
-            positions,
+            )
-            normals,
-            indices,
-            index_offset
         );
     }
 
     if (triangle_strip_list_b_offset) {
-        parse_triangle_strip_list(
+        model.meshes.push(
+            ...parse_triangle_strip_list(
                 cursor,
                 triangle_strip_list_b_offset,
-            triangle_strip_b_count,
+                triangle_strip_b_count
-            positions,
+            )
-            normals,
-            indices,
-            index_offset
         );
     }
+
+    return model;
 }
 
 function parse_triangle_strip_list(
     cursor: BufferCursor,
     triangle_strip_list_offset: number,
     triangle_strip_count: number,
-    positions: number[],
+): XjTriangleStrip[] {
-    normals: number[],
+    const strips: XjTriangleStrip[] = [];
-    indices: number[],
+
-    index_offset: number
-): void {
     for (let i = 0; i < triangle_strip_count; ++i) {
         cursor.seek_start(triangle_strip_list_offset + i * 20);
         cursor.seek(8); // Skip material information.
@@ -106,67 +100,10 @@ function parse_triangle_strip_list(
         // Ignoring 4 bytes.
 
         cursor.seek_start(index_list_offset);
-        const strip_indices = cursor.u16_array(index_count);
+        const indices = cursor.u16_array(index_count);
-        let clockwise = true;
 
-        for (let j = 2; j < strip_indices.length; ++j) {
+        strips.push({ indices });
-            const a = index_offset + strip_indices[j - 2];
-            const b = index_offset + strip_indices[j - 1];
-            const c = index_offset + strip_indices[j];
-            const pa = new Vector3(positions[3 * a], positions[3 * a + 1], positions[3 * a + 2]);
-            const pb = new Vector3(positions[3 * b], positions[3 * b + 1], positions[3 * b + 2]);
-            const pc = new Vector3(positions[3 * c], positions[3 * c + 1], positions[3 * c + 2]);
-            const na = new Vector3(normals[3 * a], normals[3 * a + 1], normals[3 * a + 2]);
-            const nb = new Vector3(normals[3 * a], normals[3 * a + 1], normals[3 * a + 2]);
-            const nc = new Vector3(normals[3 * a], normals[3 * a + 1], normals[3 * a + 2]);
-
-            // Calculate a surface normal and reverse the vertex winding if at least 2 of the vertex normals point in the opposite direction.
-            // This hack fixes the winding for most models.
-            const normal = pb.clone().sub(pa).cross(pc.clone().sub(pa));
-
-            if (clockwise) {
-                normal.negate();
     }
 
-            const opposite_count =
+    return strips;
-                (normal.dot(na) < 0 ? 1 : 0) +
-                (normal.dot(nb) < 0 ? 1 : 0) +
-                (normal.dot(nc) < 0 ? 1 : 0);
-
-            if (opposite_count >= 2) {
-                clockwise = !clockwise;
-            }
-
-            if (clockwise) {
-                indices.push(b);
-                indices.push(a);
-                indices.push(c);
-            } else {
-                indices.push(a);
-                indices.push(b);
-                indices.push(c);
-            }
-
-            clockwise = !clockwise;
-
-            // The following switch statement fixes model 180.xj (zanba).
-            // switch (j) {
-            //     case 17:
-            //     case 52:
-            //     case 70:
-            //     case 92:
-            //     case 97:
-            //     case 126:
-            //     case 140:
-            //     case 148:
-            //     case 187:
-            //     case 200:
-            //         console.warn(`swapping winding at: ${j}, (${a}, ${b}, ${c})`);
-            //         break;
-            //     default:
-            //         ccw = !ccw;
-            //         break;
-            // }
-        }
-    }
 }

src/domain/index.ts

@@ -60,10 +60,10 @@ export class Vec3 {
     y: number;
     z: number;
 
-    constructor(x?: number, y?: number, z?: number) {
+    constructor(x: number, y: number, z: number) {
-        this.x = x || 0;
+        this.x = x;
-        this.y = y || 0;
+        this.y = y;
-        this.z = z || 0;
+        this.z = z;
     }
 
     add(v: Vec3): Vec3 {
@@ -73,11 +73,8 @@ export class Vec3 {
         return this;
     }
 
-    clone(x?: number, y?: number, z?: number) {
+    clone() {
-        return new Vec3(
+        return new Vec3(this.x, this.y, this.z);
-            typeof x === 'number' ? x : this.x,
-            typeof y === 'number' ? y : this.y,
-            typeof z === 'number' ? z : this.z);
     }
 };
 
@@ -216,7 +213,7 @@ export class QuestEntity {
         }
     }
 
-    object3d?: Object3D;
+    object_3d?: Object3D;
 
     constructor(
         area_id: number,

src/rendering/Renderer.ts

@@ -198,8 +198,8 @@ export class Renderer {
 
             for (const object of this.quest.objects) {
                 if (object.area_id === this.area.id) {
-                    if (object.object3d) {
+                    if (object.object_3d) {
-                        this.objGeometry.add(object.object3d);
+                        this.objGeometry.add(object.object_3d);
                     } else {
                         loaded = false;
                     }
@@ -208,8 +208,8 @@ export class Renderer {
 
             for (const npc of this.quest.npcs) {
                 if (npc.area_id === this.area.id) {
-                    if (npc.object3d) {
+                    if (npc.object_3d) {
-                        this.npcGeometry.add(npc.object3d);
+                        this.npcGeometry.add(npc.object_3d);
                     } else {
                         loaded = false;
                     }
@@ -257,7 +257,7 @@ export class Renderer {
             : oldSelectedData !== data;
 
         if (selectionChanged) {
-            quest_editor_store.setSelectedEntity(data && data.entity);
+            quest_editor_store.set_selected_entity(data && data.entity);
         }
     }
 

src/rendering/animation.ts

@@ -1,4 +1,4 @@
-import { AnimationClip, InterpolateLinear, InterpolateSmooth, KeyframeTrack, VectorKeyframeTrack } from "three";
+import { AnimationClip, Euler, InterpolateLinear, InterpolateSmooth, KeyframeTrack, Quaternion, QuaternionKeyframeTrack, VectorKeyframeTrack } from "three";
 import { NjAction, NjInterpolation, NjKeyframeTrackType } from "../bin_data/parsing/ninja/motion";
 
 const PSO_FRAME_RATE = 30;
@@ -8,32 +8,50 @@ export function create_animation_clip(action: NjAction): AnimationClip {
     const interpolation = motion.interpolation === NjInterpolation.Spline
         ? InterpolateSmooth
         : InterpolateLinear;
-    // TODO: parse data for all objects.
-    const motion_data = motion.motion_data[0];
 
     const tracks: KeyframeTrack[] = [];
 
+    motion.motion_data.forEach((motion_data, object_id) => {
         motion_data.tracks.forEach(({ type, keyframes }) => {
-        // TODO: rotation
-        if (type === NjKeyframeTrackType.Rotation) return;
-
             const times: number[] = [];
             const values: number[] = [];
 
+            if (type === NjKeyframeTrackType.Position) {
+                const name = `obj_${object_id}.position`;
+
                 for (const keyframe of keyframes) {
                     times.push(keyframe.frame / PSO_FRAME_RATE);
-            values.push(...keyframe.value);
+                    values.push(keyframe.value.x, keyframe.value.y, keyframe.value.z);
                 }
 
-        let name: string;
+                tracks.push(new VectorKeyframeTrack(name, times, values, interpolation));
+            } else if (type === NjKeyframeTrackType.Scale) {
+                const name = `obj_${object_id}.scale`;
 
-        switch (type) {
+                for (const keyframe of keyframes) {
-            case NjKeyframeTrackType.Position: name = '.position'; break;
+                    times.push(keyframe.frame / PSO_FRAME_RATE);
-            // case NjKeyframeTrackType.Rotation: name = 'rotation'; break;
+                    values.push(keyframe.value.x, keyframe.value.y, keyframe.value.z);
-            case NjKeyframeTrackType.Scale: name = '.scale'; break;
                 }
 
-        tracks.push(new VectorKeyframeTrack(name!, times, values, interpolation));
+                tracks.push(new VectorKeyframeTrack(name, times, values, interpolation));
+            } else {
+                for (const keyframe of keyframes) {
+                    times.push(keyframe.frame / PSO_FRAME_RATE);
+
+                    const quat = new Quaternion().setFromEuler(
+                        new Euler(keyframe.value.x, keyframe.value.y, keyframe.value.z)
+                    );
+
+                    values.push(quat.x, quat.y, quat.z, quat.w);
+                }
+
+                tracks.push(
+                    new QuaternionKeyframeTrack(
+                        `obj_${object_id}.quaternion`, times, values, interpolation
+                    )
+                );
+            }
+        });
     });
 
     return new AnimationClip(

src/rendering/entities.ts

@@ -1,6 +1,6 @@
 import { autorun } from 'mobx';
 import { BufferGeometry, DoubleSide, Mesh, MeshLambertMaterial } from 'three';
-import { QuestNpc, QuestObject, QuestEntity } from '../domain';
+import { QuestEntity, QuestNpc, QuestObject } from '../domain';
 
 export const OBJECT_COLOR = 0xFFFF00;
 export const OBJECT_HOVER_COLOR = 0xFFDF3F;
@@ -23,23 +23,23 @@ function create_mesh(
     color: number,
     type: string
 ): Mesh {
-    const object_3d = new Mesh(
+    const mesh = new Mesh(
         geometry,
         new MeshLambertMaterial({
             color,
             side: DoubleSide
         })
-    );
+    )
-    object_3d.name = type;
+    mesh.name = type;
-    object_3d.userData.entity = entity;
+    mesh.userData.entity = entity;
 
     // TODO: dispose autorun?
     autorun(() => {
         const { x, y, z } = entity.position;
-        object_3d.position.set(x, y, z);
+        mesh.position.set(x, y, z);
         const rot = entity.rotation;
-        object_3d.rotation.set(rot.x, rot.y, rot.z);
+        mesh.rotation.set(rot.x, rot.y, rot.z);
     });
 
-    return object_3d;
+    return mesh;
 }

src/rendering/index.ts

@@ -0,0 +1,6 @@
+import { Vec3 } from "../domain";
+import { Vector3 } from "three";
+
+export function vec3_to_threejs(v: Vec3): Vector3 {
+    return new Vector3(v.x, v.y, v.z);
+}

src/rendering/models.ts

@@ -1,11 +1,340 @@
-import { BufferGeometry, DoubleSide, Mesh, MeshLambertMaterial } from 'three';
+import { BufferAttribute, BufferGeometry, DoubleSide, Euler, Material, Matrix3, Matrix4, Mesh, MeshLambertMaterial, Object3D, Quaternion, Vector3 } from 'three';
+import { vec3_to_threejs } from '.';
+import { NinjaModel, NinjaObject } from '../bin_data/parsing/ninja';
+import { NjModel } from '../bin_data/parsing/ninja/nj';
+import { XjModel } from '../bin_data/parsing/ninja/xj';
+import { Vec3 } from '../domain';
 
-export function create_model_mesh(geometry?: BufferGeometry): Mesh | undefined {
+const DEFAULT_MATERIAL = new MeshLambertMaterial({
-    return geometry && new Mesh(
-        geometry,
-        new MeshLambertMaterial({
     color: 0xFF00FF,
     side: DoubleSide
-        })
+});
-    );
+const DEFAULT_NORMAL = new Vec3(0, 1, 0);
+
+export function ninja_object_to_object3d(
+    object: NinjaObject<NinjaModel>,
+    material: Material = DEFAULT_MATERIAL
+): Object3D {
+    return new Object3DCreator(material).create_object_3d(object);
+}
+
+/**
+ * Generate a single BufferGeometry.
+ */
+export function ninja_object_to_buffer_geometry(
+    object: NinjaObject<NinjaModel>,
+    material: Material = DEFAULT_MATERIAL
+): BufferGeometry {
+    return new Object3DCreator(material).create_buffer_geometry(object);
+}
+
+class Object3DCreator {
+    private id: number = 0;
+    private vertices: { position: Vector3, normal?: Vector3 }[] = [];
+    private positions: number[] = [];
+    private normals: number[] = [];
+    private indices: number[] = [];
+    private flat: boolean = false;
+
+    constructor(
+        private material: Material
+    ) { }
+
+    create_object_3d(object: NinjaObject<NinjaModel>): Object3D {
+        return this.object_to_object3d(object, new Matrix4())!;
+    }
+
+    create_buffer_geometry(object: NinjaObject<NinjaModel>): BufferGeometry {
+        this.flat = true;
+
+        this.object_to_object3d(object, new Matrix4());
+
+        const geom = new BufferGeometry();
+
+        geom.addAttribute('position', new BufferAttribute(new Float32Array(this.positions), 3));
+        geom.addAttribute('normal', new BufferAttribute(new Float32Array(this.normals), 3));
+
+        if (this.indices.length) {
+            geom.setIndex(new BufferAttribute(new Uint16Array(this.indices), 1));
+        }
+
+        // The bounding spheres from the object seem be too small.
+        geom.computeBoundingSphere();
+
+        return geom;
+    }
+
+    private object_to_object3d(object: NinjaObject<NinjaModel>, parent_matrix: Matrix4): Object3D | undefined {
+        const {
+            no_translate, no_rotate, no_scale, hidden, break_child_trace, zxy_rotation_order, eval_skip
+        } = object.evaluation_flags;
+        const { position, rotation, scale } = object;
+
+        const euler = new Euler(
+            rotation.x, rotation.y, rotation.z, zxy_rotation_order ? 'ZXY' : 'ZYX'
+        );
+        const matrix = new Matrix4()
+            .compose(
+                no_translate ? new Vector3() : vec3_to_threejs(position),
+                no_rotate ? new Quaternion(0, 0, 0, 1) : new Quaternion().setFromEuler(euler),
+                no_scale ? new Vector3(1, 1, 1) : vec3_to_threejs(scale)
+            )
+            .premultiply(parent_matrix);
+
+        if (this.flat) {
+            if (object.model && !hidden) {
+                this.model_to_geometry(object.model, matrix);
+            }
+
+            if (!break_child_trace) {
+                for (const child of object.children) {
+                    this.object_to_object3d(child, matrix);
+                }
+            }
+
+            return undefined;
+        } else {
+            let mesh: Object3D;
+
+            if (object.model && !hidden) {
+                mesh = new Mesh(
+                    this.model_to_geometry(object.model, matrix),
+                    this.material
+                );
+            } else {
+                mesh = new Object3D();
+            }
+
+            if (!eval_skip) {
+                mesh.name = `obj_${this.id++}`;
+            }
+
+            mesh.position.set(position.x, position.y, position.z);
+            mesh.setRotationFromEuler(euler);
+            mesh.scale.set(scale.x, scale.y, scale.z);
+
+            if (!break_child_trace) {
+                for (const child of object.children) {
+                    mesh.add(this.object_to_object3d(child, matrix)!);
+                }
+            }
+
+            return mesh;
+        }
+    }
+
+    private model_to_geometry(model: NinjaModel, matrix: Matrix4): BufferGeometry | undefined {
+        if (model.type === 'nj') {
+            return this.nj_model_to_geometry(model, matrix);
+        } else {
+            return this.xj_model_to_geometry(model, matrix);
+        }
+    }
+
+    // TODO: use indices and don't add duplicate positions/normals.
+    private nj_model_to_geometry(model: NjModel, matrix: Matrix4): BufferGeometry | undefined {
+        const positions = this.flat ? this.positions : [];
+        const normals = this.flat ? this.normals : [];
+
+        const normal_matrix = new Matrix3().getNormalMatrix(matrix);
+
+        const matrix_inverse = new Matrix4().getInverse(matrix);
+        const normal_matrix_inverse = new Matrix3().getNormalMatrix(matrix_inverse);
+
+        const new_vertices = model.vertices.map(({ position, normal }) => {
+            const new_position = vec3_to_threejs(position).applyMatrix4(matrix);
+
+            const new_normal = normal
+                ? vec3_to_threejs(normal).applyMatrix3(normal_matrix)
+                : DEFAULT_NORMAL;
+
+            return {
+                position: new_position,
+                normal: new_normal
+            };
+        });
+
+        if (this.flat) {
+            Object.assign(this.vertices, new_vertices);
+        }
+
+        for (const mesh of model.meshes) {
+            for (let i = 2; i < mesh.indices.length; ++i) {
+                const a_idx = mesh.indices[i - 2];
+                const b_idx = mesh.indices[i - 1];
+                const c_idx = mesh.indices[i];
+                let a;
+                let b;
+                let c;
+
+                if (this.flat) {
+                    a = this.vertices[a_idx];
+                    b = this.vertices[b_idx];
+                    c = this.vertices[c_idx];
+                } else {
+                    a = model.vertices[a_idx];
+                    b = model.vertices[b_idx];
+                    c = model.vertices[c_idx];
+
+                    if (!a && this.vertices[a_idx]) {
+                        const { position, normal } = this.vertices[a_idx];
+                        a = {
+                            position: position.clone().applyMatrix4(matrix_inverse),
+                            normal: normal && normal.clone().applyMatrix3(normal_matrix_inverse)
+                        };
+                    }
+
+                    if (!b && this.vertices[b_idx]) {
+                        const { position, normal } = this.vertices[b_idx];
+                        b = {
+                            position: position.clone().applyMatrix4(matrix_inverse),
+                            normal: normal && normal.clone().applyMatrix3(normal_matrix_inverse)
+                        };
+                    }
+
+                    if (!c && this.vertices[c_idx]) {
+                        const { position, normal } = this.vertices[c_idx];
+                        c = {
+                            position: position.clone().applyMatrix4(matrix_inverse),
+                            normal: normal && normal.clone().applyMatrix3(normal_matrix_inverse)
+                        };
+                    }
+                }
+
+                if (a && b && c) {
+                    const a_n = a.normal || DEFAULT_NORMAL;
+                    const b_n = b.normal || DEFAULT_NORMAL;
+                    const c_n = c.normal || DEFAULT_NORMAL;
+
+                    if (i % 2 === (mesh.clockwise_winding ? 1 : 0)) {
+                        positions.push(a.position.x, a.position.y, a.position.z);
+                        positions.push(b.position.x, b.position.y, b.position.z);
+                        positions.push(c.position.x, c.position.y, c.position.z);
+                        normals.push(a_n.x, a_n.y, a_n.z);
+                        normals.push(b_n.x, b_n.y, b_n.z);
+                        normals.push(c_n.x, c_n.y, c_n.z);
+                    } else {
+                        positions.push(b.position.x, b.position.y, b.position.z);
+                        positions.push(a.position.x, a.position.y, a.position.z);
+                        positions.push(c.position.x, c.position.y, c.position.z);
+                        normals.push(b_n.x, b_n.y, b_n.z);
+                        normals.push(a_n.x, a_n.y, a_n.z);
+                        normals.push(c_n.x, c_n.y, c_n.z);
+                    }
+                }
+            }
+        }
+
+        if (this.flat) {
+            return undefined;
+        } else {
+            Object.assign(this.vertices, new_vertices);
+
+            const geom = new BufferGeometry();
+
+            geom.addAttribute('position', new BufferAttribute(new Float32Array(positions), 3));
+            geom.addAttribute('normal', new BufferAttribute(new Float32Array(normals), 3));
+            // The bounding spheres from the object seem be too small.
+            geom.computeBoundingSphere();
+
+            return geom;
+        }
+    }
+
+    private xj_model_to_geometry(model: XjModel, matrix: Matrix4): BufferGeometry | undefined {
+        const positions = this.flat ? this.positions : [];
+        const normals = this.flat ? this.normals : [];
+        const indices = this.flat ? this.indices : [];
+        const index_offset = this.flat ? this.positions.length / 3 : 0;
+        let clockwise = true;
+
+        const normal_matrix = new Matrix3().getNormalMatrix(matrix);
+
+        for (let { position, normal } of model.vertices) {
+            const p = this.flat ? vec3_to_threejs(position).applyMatrix4(matrix) : position;
+            positions.push(p.x, p.y, p.z);
+
+            normal = normal || DEFAULT_NORMAL;
+            const n = this.flat ? vec3_to_threejs(normal).applyMatrix3(normal_matrix) : normal;
+            normals.push(n.x, n.y, n.z);
+        }
+
+        for (const mesh of model.meshes) {
+            const strip_indices = mesh.indices;
+
+            for (let j = 2; j < strip_indices.length; ++j) {
+                const a = index_offset + strip_indices[j - 2];
+                const b = index_offset + strip_indices[j - 1];
+                const c = index_offset + strip_indices[j];
+                const pa = new Vector3(positions[3 * a], positions[3 * a + 1], positions[3 * a + 2]);
+                const pb = new Vector3(positions[3 * b], positions[3 * b + 1], positions[3 * b + 2]);
+                const pc = new Vector3(positions[3 * c], positions[3 * c + 1], positions[3 * c + 2]);
+                const na = new Vector3(normals[3 * a], normals[3 * a + 1], normals[3 * a + 2]);
+                const nb = new Vector3(normals[3 * a], normals[3 * a + 1], normals[3 * a + 2]);
+                const nc = new Vector3(normals[3 * a], normals[3 * a + 1], normals[3 * a + 2]);
+
+                // Calculate a surface normal and reverse the vertex winding if at least 2 of the vertex normals point in the opposite direction.
+                // This hack fixes the winding for most models.
+                const normal = pb.clone().sub(pa).cross(pc.clone().sub(pa));
+
+                if (clockwise) {
+                    normal.negate();
+                }
+
+                const opposite_count =
+                    (normal.dot(na) < 0 ? 1 : 0) +
+                    (normal.dot(nb) < 0 ? 1 : 0) +
+                    (normal.dot(nc) < 0 ? 1 : 0);
+
+                if (opposite_count >= 2) {
+                    clockwise = !clockwise;
+                }
+
+                if (clockwise) {
+                    indices.push(b);
+                    indices.push(a);
+                    indices.push(c);
+                } else {
+                    indices.push(a);
+                    indices.push(b);
+                    indices.push(c);
+                }
+
+                clockwise = !clockwise;
+
+                // The following switch statement fixes model 180.xj (zanba).
+                // switch (j) {
+                //     case 17:
+                //     case 52:
+                //     case 70:
+                //     case 92:
+                //     case 97:
+                //     case 126:
+                //     case 140:
+                //     case 148:
+                //     case 187:
+                //     case 200:
+                //         console.warn(`swapping winding at: ${j}, (${a}, ${b}, ${c})`);
+                //         break;
+                //     default:
+                //         ccw = !ccw;
+                //         break;
+                // }
+            }
+        }
+
+        if (this.flat) {
+            return undefined;
+        } else {
+            const geom = new BufferGeometry();
+
+            geom.addAttribute('position', new BufferAttribute(new Float32Array(positions), 3));
+            geom.addAttribute('normal', new BufferAttribute(new Float32Array(normals), 3));
+            geom.setIndex(new BufferAttribute(new Uint16Array(indices), 1));
+            // The bounding spheres from the object seem be too small.
+            geom.computeBoundingSphere();
+
+            return geom;
+        }
+    }
 }

src/stores/QuestEditorStore.ts

@@ -4,22 +4,44 @@ import { AnimationClip, AnimationMixer, Object3D } from 'three';
 import { BufferCursor } from '../bin_data/BufferCursor';
 import { get_area_sections } from '../bin_data/loading/areas';
 import { get_npc_geometry, get_object_geometry } from '../bin_data/loading/entities';
-import { parse_nj, parse_xj } from '../bin_data/parsing/ninja';
+import { parse_nj, parse_xj, NinjaObject, NinjaModel } from '../bin_data/parsing/ninja';
 import { parse_njm_4 } from '../bin_data/parsing/ninja/motion';
 import { parse_quest, write_quest_qst } from '../bin_data/parsing/quest';
 import { Area, Quest, QuestEntity, Section, Vec3 } from '../domain';
 import { create_animation_clip } from '../rendering/animation';
-import { create_npc_mesh, create_object_mesh } from '../rendering/entities';
+import { create_npc_mesh as create_npc_object_3d, create_object_mesh as create_object_object_3d } from '../rendering/entities';
-import { create_model_mesh } from '../rendering/models';
+import { ninja_object_to_object3d as create_model_obj3d } from '../rendering/models';
 
 const logger = Logger.get('stores/QuestEditorStore');
 
+function traverse(
+    object: NinjaObject<NinjaModel>,
+    head_part: NinjaObject<NinjaModel>,
+    id_ref: [number]
+) {
+    if (!object.evaluation_flags.eval_skip) {
+        const id = id_ref[0]++;
+
+        if (id === 59) {
+            object.evaluation_flags.hidden = false;
+            object.evaluation_flags.break_child_trace = false;
+            object.children.push(head_part);
+            return;
+        }
+    }
+
+    for (const child of object.children) {
+        traverse(child, head_part, id_ref);
+    }
+}
+
 class QuestEditorStore {
     @observable current_quest?: Quest;
     @observable current_area?: Area;
     @observable selected_entity?: QuestEntity;
 
-    @observable.ref current_model?: Object3D;
+    @observable.ref current_model?: NinjaObject<NinjaModel>;
+    @observable.ref current_model_obj3d?: Object3D;
     @observable.ref animation_mixer?: AnimationMixer;
 
     set_quest = action('set_quest', (quest?: Quest) => {
@@ -31,19 +53,28 @@ class QuestEditorStore {
         }
     })
 
-    set_model = action('set_model', (model?: Object3D) => {
+    set_model = action('set_model', (model?: NinjaObject<NinjaModel>) => {
         this.reset_model_and_quest_state();
+
+        if (model) {
+            if (this.current_model) {
+                traverse(this.current_model, model, [0]);
+            } else {
                 this.current_model = model;
+            }
+
+            this.current_model_obj3d = create_model_obj3d(this.current_model);
+        }
     })
 
     add_animation = action('add_animation', (clip: AnimationClip) => {
-        if (!this.current_model) return;
+        if (!this.current_model_obj3d) return;
 
         if (this.animation_mixer) {
             this.animation_mixer.stopAllAction();
-            this.animation_mixer.uncacheRoot(this.current_model);
+            this.animation_mixer.uncacheRoot(this.current_model_obj3d);
         } else {
-            this.animation_mixer = new AnimationMixer(this.current_model);
+            this.animation_mixer = new AnimationMixer(this.current_model_obj3d);
         }
 
         const action = this.animation_mixer.clipAction(clip);
@@ -59,11 +90,11 @@ class QuestEditorStore {
             this.animation_mixer.uncacheRoot(this.current_model);
         }
 
-        this.current_model = undefined;
+        this.current_model_obj3d = undefined;
         this.animation_mixer = undefined;
     }
 
-    setSelectedEntity = (entity?: QuestEntity) => {
+    set_selected_entity = (entity?: QuestEntity) => {
         this.selected_entity = entity;
     }
 
@@ -94,12 +125,16 @@ class QuestEditorStore {
         }
 
         if (file.name.endsWith('.nj')) {
-            this.set_model(create_model_mesh(parse_nj(new BufferCursor(reader.result, true))));
+            const model = parse_nj(new BufferCursor(reader.result, true))[0];
+            this.set_model(model);
         } else if (file.name.endsWith('.xj')) {
-            this.set_model(create_model_mesh(parse_xj(new BufferCursor(reader.result, true))));
+            const model = parse_xj(new BufferCursor(reader.result, true))[0];
+            this.set_model(model);
         } else if (file.name.endsWith('.njm')) {
             this.add_animation(
-                create_animation_clip(parse_njm_4(new BufferCursor(reader.result, true)))
+                create_animation_clip(
+                    parse_njm_4(new BufferCursor(reader.result, true))
+                )
             );
         } else {
             const quest = parse_quest(new BufferCursor(reader.result, true));
@@ -118,9 +153,9 @@ class QuestEditorStore {
                     // Generate object geometry.
                     for (const object of quest.objects.filter(o => o.area_id === variant.area.id)) {
                         try {
-                            const geometry = await get_object_geometry(object.type);
+                            const object_geom = await get_object_geometry(object.type);
                             this.set_section_on_visible_quest_entity(object, sections);
-                            object.object3d = create_object_mesh(object, geometry);
+                            object.object_3d = create_object_object_3d(object, object_geom);
                         } catch (e) {
                             logger.error(e);
                         }
@@ -129,9 +164,9 @@ class QuestEditorStore {
                     // Generate NPC geometry.
                     for (const npc of quest.npcs.filter(npc => npc.area_id === variant.area.id)) {
                         try {
-                            const geometry = await get_npc_geometry(npc.type);
+                            const npc_geom = await get_npc_geometry(npc.type);
                             this.set_section_on_visible_quest_entity(npc, sections);
-                            npc.object3d = create_npc_mesh(npc, geometry);
+                            npc.object_3d = create_npc_object_3d(npc, npc_geom);
                         } catch (e) {
                             logger.error(e);
                         }

src/ui/quest_editor/QuestEditorComponent.tsx

@@ -22,8 +22,6 @@ export class QuestEditorComponent extends React.Component<{}, {
 
     render() {
         const quest = quest_editor_store.current_quest;
-        const model = quest_editor_store.current_model;
-        const area = quest_editor_store.current_area;
 
         return (
             <div className="qe-QuestEditorComponent">
@@ -32,8 +30,8 @@ export class QuestEditorComponent extends React.Component<{}, {
                     <QuestInfoComponent quest={quest} />
                     <RendererComponent
                         quest={quest}
-                        area={area}
+                        area={quest_editor_store.current_area}
-                        model={model}
+                        model={quest_editor_store.current_model_obj3d}
                     />
                     <EntityInfoComponent entity={quest_editor_store.selected_entity} />
                 </div>