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Improved Ninja geometry to Three.js conversion speed by avoiding some GC.

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This commit is contained in:
Daan Vanden Bosch 2021-03-22 21:07:39 +01:00
parent f57de99577
commit b8edf35b30
1 changed files with 18 additions and 11 deletions
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29
web/src/main/kotlin/world/phantasmal/web/core/rendering/conversion/NinjaGeometryConversion.kt
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@ -2,9 +2,7 @@ package world.phantasmal.web.core.rendering.conversion
import mu.KotlinLogging
import world.phantasmal.lib.fileFormats.ninja.*
import world.phantasmal.web.core.cross
import world.phantasmal.web.core.dot
import world.phantasmal.web.core.minus
import world.phantasmal.web.core.toQuaternion
import world.phantasmal.web.externals.three.*
@ -16,6 +14,11 @@ private val NO_TRANSLATION = Vector3(0.0, 0.0, 0.0)
private val NO_ROTATION = Quaternion()
private val NO_SCALE = Vector3(1.0, 1.0, 1.0)
// Objects used for temporary calculations to avoid GC.
private val tmpNormal = Vector3()
private val tmpVec = Vector3()
private val tmpNormalMatrix = Matrix3()
fun ninjaObjectToMesh(
ninjaObject: NinjaObject<*>,
textures: List<XvrTexture?>,
@ -128,7 +131,7 @@ private class NinjaToMeshConverter(private val builder: MeshBuilder) {
}
private fun convertNjModel(model: NjModel, matrix: Matrix4) {
val normalMatrix = Matrix3().getNormalMatrix(matrix)
tmpNormalMatrix.getNormalMatrix(matrix)
val newVertices = model.vertices.map { vertex ->
vertex?.let {
@ -136,7 +139,7 @@ private class NinjaToMeshConverter(private val builder: MeshBuilder) {
val normal = vertex.normal?.let(::vec3ToThree) ?: Vector3(0.0, 1.0, 0.0)
position.applyMatrix4(matrix)
normal.applyMatrix3(normalMatrix)
normal.applyMatrix3(tmpNormalMatrix)
Vertex(
boneIndex,
@ -218,14 +221,14 @@ private class NinjaToMeshConverter(private val builder: MeshBuilder) {
private fun convertXjModel(model: XjModel, matrix: Matrix4) {
val indexOffset = builder.vertexCount
val normalMatrix = Matrix3().getNormalMatrix(matrix)
tmpNormalMatrix.getNormalMatrix(matrix)
for (vertex in model.vertices) {
val p = vec3ToThree(vertex.position)
p.applyMatrix4(matrix)
val n = vertex.normal?.let(::vec3ToThree) ?: Vector3(0.0, 1.0, 0.0)
n.applyMatrix3(normalMatrix)
n.applyMatrix3(tmpNormalMatrix)
val uv = vertex.uv?.let(::vec2ToThree) ?: DEFAULT_UV
@ -263,16 +266,20 @@ private class NinjaToMeshConverter(private val builder: MeshBuilder) {
// 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.
val normal = (pb - pa) cross (pc - pa)
tmpNormal.copy(pb)
tmpNormal.sub(pa)
tmpVec.copy(pc)
tmpVec.sub(pa)
tmpNormal.cross(tmpVec)
if (clockwise) {
normal.negate()
tmpNormal.negate()
}
val oppositeCount =
(if (normal dot na < 0) 1 else 0) +
(if (normal dot nb < 0) 1 else 0) +
(if (normal dot nc < 0) 1 else 0)
(if (tmpNormal dot na < 0) 1 else 0) +
(if (tmpNormal dot nb < 0) 1 else 0) +
(if (tmpNormal dot nc < 0) 1 else 0)
if (oppositeCount >= 2) {
clockwise = !clockwise