fix: anisotropy works without Surface

bhouston · Jul 29, 2020 · b5c3280 · b5c3280
1 parent 60caa7e
commit b5c3280
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/examples/brdfs/specularAnisotropic/fragment.glsl b/src/examples/brdfs/specularAnisotropic/fragment.glsl
@@ -18,6 +18,7 @@ uniform sampler2D specularAnisotropicFlowMap;
 #pragma include <brdfs/specular/anisotropy>
 #pragma include <color/spaces/srgb>
 #pragma include <normals/tangentSpace>
+#pragma include <math/mat2>
 #pragma include <math/mat3>
 
 void main() {
@@ -33,8 +34,9 @@ void main() {
   vec3 viewDirection = normalize( -v_viewSurfacePosition );
 
   mat3 tangentToView = tangentToViewFromPositionNormalUV( position, normal, v_uv0 );
-  tangentToView = tangentToView * mat3RotateZDirection( normalize( specularAnisotropicFlow ).yx );
+  tangentToView = tangentToView * mat3RotateZDirection( normalize( specularAnisotropicFlow ) * mat2Rotate( degToRad( 90. ) ) );
   tangentToView[2] = bendNormalForAnistropicReflections( viewDirection, tangentToView, length( specularAnisotropicFlow ), specularRoughness );
+
   normal = tangentToView[2];
 
   PunctualLight punctualLight;