Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/Voxels/convertLocalToBoxUv.glsl

@@ -0,0 +1,29 @@
+uniform vec3 u_boxLocalToShapeUvScale;
+
+uniform ivec4 u_cameraTileCoordinates;
+uniform vec3 u_cameraTileUv;
+uniform mat3 u_boxEcToXyz;
+
+mat3 convertLocalToShapeSpaceDerivative(in vec3 positionLocal) {
+    // For BOX, local space = shape space, so the Jacobian is the identity matrix.
+    return mat3(1.0);
+}
+
+vec3 scaleShapeUvToShapeSpace(in vec3 shapeUv) {
+    return shapeUv / u_boxLocalToShapeUvScale;
+}
+
+vec3 convertEcToDeltaTile(in vec3 positionEC) {
+    vec3 dPosition = u_boxEcToXyz * positionEC;
+    return u_boxLocalToShapeUvScale * dPosition * float(1 << u_cameraTileCoordinates.w);
+}
+
+TileAndUvCoordinate getTileAndUvCoordinate(in vec3 positionEC) {
+    vec3 deltaTileCoordinate = convertEcToDeltaTile(positionEC);
+    vec3 tileUvSum = u_cameraTileUv + deltaTileCoordinate;
+    ivec3 tileCoordinate = u_cameraTileCoordinates.xyz + ivec3(floor(tileUvSum));
+    tileCoordinate = min(max(ivec3(0), tileCoordinate), ivec3((1 << u_cameraTileCoordinates.w) - 1));
+    ivec3 tileCoordinateChange = tileCoordinate - u_cameraTileCoordinates.xyz;
+    vec3 tileUv = clamp(tileUvSum - vec3(tileCoordinateChange), 0.0, 1.0);
+    return TileAndUvCoordinate(ivec4(tileCoordinate, u_cameraTileCoordinates.w), tileUv);
+}