[Rendering] Fix Skinning Matrix multiplication;

LittleCodingFox · LittleCodingFox · commit 8ce2fc72b4ee · 2025-12-11T01:56:41.000Z
diff --git a/Tools/ShaderIncludes/Staple.slang b/Tools/ShaderIncludes/Staple.slang
@@ -95,9 +95,9 @@ public float4x4 StapleGetBoneMatrix(int index)
 
 public float4x4 StapleGetSkinningMatrix(float4x4 world, float4 indices, float4 weights)
 {
-    return mul(weights.x * StapleGetBoneMatrix(int(indices.x)) +
+    return mul(world, weights.x * StapleGetBoneMatrix(int(indices.x)) +
         weights.y * StapleGetBoneMatrix(int(indices.y)) +
         weights.z * StapleGetBoneMatrix(int(indices.z)) +
-        weights.w * StapleGetBoneMatrix(int(indices.w)), world);
+        weights.w * StapleGetBoneMatrix(int(indices.w)));
 }
 #endif

Original file line number	Diff line number	Diff line change
`@@ -95,9 +95,9 @@ public float4x4 StapleGetBoneMatrix(int index)`
`95`	`95`
`96`	`96`	`public float4x4 StapleGetSkinningMatrix(float4x4 world, float4 indices, float4 weights)`
`97`	`97`	`{`
`98`		`- return mul(weights.x * StapleGetBoneMatrix(int(indices.x)) +`
	`98`	`+ return mul(world, weights.x * StapleGetBoneMatrix(int(indices.x)) +`
`99`	`99`	`weights.y * StapleGetBoneMatrix(int(indices.y)) +`
`100`	`100`	`weights.z * StapleGetBoneMatrix(int(indices.z)) +`
`101`		`- weights.w * StapleGetBoneMatrix(int(indices.w)), world);`
	`101`	`+ weights.w * StapleGetBoneMatrix(int(indices.w)));`
`102`	`102`	`}`
`103`	`103`	`#endif`