Gsplat rotation fix (#7587)

slimbuck · web-flow · commit 2e8c8a03f902 · 2025-04-23T15:55:57.000+01:00
diff --git a/src/scene/shader-lib/chunks/gsplat/vert/gsplatData.js b/src/scene/shader-lib/chunks/gsplat/vert/gsplatData.js
@@ -32,7 +32,7 @@ mat3 quatToMat3(vec4 R) {
 }
 
 vec4 unpackRotation(vec3 packed) {
-    return vec4(packed.xyz, sqrt(1.0 - dot(packed, packed)));
+    return vec4(packed.xyz, sqrt(max(0.0, 1.0 - dot(packed, packed))));
 }
 
 // sample covariance vectors

Original file line number	Diff line number	Diff line change
`@@ -32,7 +32,7 @@ mat3 quatToMat3(vec4 R) {`
`32`	`32`	`}`
`33`	`33`
`34`	`34`	`vec4 unpackRotation(vec3 packed) {`
`35`		`- return vec4(packed.xyz, sqrt(1.0 - dot(packed, packed)));`
	`35`	`+ return vec4(packed.xyz, sqrt(max(0.0, 1.0 - dot(packed, packed))));`
`36`	`36`	`}`
`37`	`37`
`38`	`38`	`// sample covariance vectors`