From 1c44ce46208ff9b53901999fb848afce507b1846 Mon Sep 17 00:00:00 2001
From: Daan Vanden Bosch <daan.v.d.bosch@gmail.com>
Date: Fri, 26 Mar 2021 14:56:09 +0100
Subject: [PATCH] Light source now stays in place when rotating a model in the
 viewer.

---
 .../world/phantasmal/web/core/rendering/RenderContext.kt       | 3 ++-
 .../main/kotlin/world/phantasmal/web/externals/three/three.kt  | 2 ++
 .../world/phantasmal/web/viewer/rendering/MeshRenderer.kt      | 2 ++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/web/src/main/kotlin/world/phantasmal/web/core/rendering/RenderContext.kt b/web/src/main/kotlin/world/phantasmal/web/core/rendering/RenderContext.kt
index 87e2f678..0474705b 100644
--- a/web/src/main/kotlin/world/phantasmal/web/core/rendering/RenderContext.kt
+++ b/web/src/main/kotlin/world/phantasmal/web/core/rendering/RenderContext.kt
@@ -13,7 +13,8 @@ open class RenderContext(
         groundColor = 0x505050,
         intensity = 1.0
     )
-    private val lightHolder = Group().add(light)
+
+    val lightHolder = Group().add(light)
 
     var width: Int = 0
     var height: Int = 0
diff --git a/web/src/main/kotlin/world/phantasmal/web/externals/three/three.kt b/web/src/main/kotlin/world/phantasmal/web/externals/three/three.kt
index 228141ec..f3b34e43 100644
--- a/web/src/main/kotlin/world/phantasmal/web/externals/three/three.kt
+++ b/web/src/main/kotlin/world/phantasmal/web/externals/three/three.kt
@@ -119,6 +119,8 @@ external class Quaternion(
     var z: Double
     var w: Double
 
+    fun copy(q: Quaternion): Quaternion
+
     fun setFromEuler(euler: Euler): Quaternion
 
     /**
diff --git a/web/src/main/kotlin/world/phantasmal/web/viewer/rendering/MeshRenderer.kt b/web/src/main/kotlin/world/phantasmal/web/viewer/rendering/MeshRenderer.kt
index 2627ab01..a87fb588 100644
--- a/web/src/main/kotlin/world/phantasmal/web/viewer/rendering/MeshRenderer.kt
+++ b/web/src/main/kotlin/world/phantasmal/web/viewer/rendering/MeshRenderer.kt
@@ -52,6 +52,8 @@ class MeshRenderer(
     override fun render() {
         animation?.mixer?.update(clock.getDelta())
 
+        context.lightHolder.quaternion.copy(context.camera.quaternion)
+
         super.render()
 
         animation?.let {