invert S, T when the UV direction is backwards

c7f8f3d1 · sunag · 6f63ebba · c7f8f3d1 · c7f8f3d1
Showing with 2 addition and 2 deletion

examples/jsm/nodes/misc/NormalMapNode.js examples/jsm/nodes/misc/NormalMapNode.js +1 -1

src/renderers/shaders/ShaderChunk/normalmap_pars_fragment.glsl.js ...erers/shaders/ShaderChunk/normalmap_pars_fragment.glsl.js +1 -1

未找到文件。
--- a/examples/jsm/nodes/misc/NormalMapNode.js
+++ b/examples/jsm/nodes/misc/NormalMapNode.js
@@ -49,7 +49,7 @@ NormalMapNode.Nodes = ( function () {
 		// Workaround for Adreno GPUs gl_FrontFacing bug. See #15850 and #10331
 		// http://hacksoflife.blogspot.com/2009/11/per-pixel-tangent-space-normal-mapping.html?showComment=1522254677437#c5087545147696715943
 		vec3 NfromST = cross( S, T );
-		if( dot( NfromST, N ) > 0.0 ) {
+		if( dot( NfromST, N ) < 0.0 ) {

 			S *= -1.0;
 			T *= -1.0;

--- a/src/renderers/shaders/ShaderChunk/normalmap_pars_fragment.glsl.js
+++ b/src/renderers/shaders/ShaderChunk/normalmap_pars_fragment.glsl.js
@@ -41,7 +41,7 @@ export default /* glsl */`
 			// Workaround for Adreno GPUs gl_FrontFacing bug. See #15850 and #10331
 			// http://hacksoflife.blogspot.com/2009/11/per-pixel-tangent-space-normal-mapping.html?showComment=1522254677437#c5087545147696715943
 			vec3 NfromST = cross( S, T );
-			if( dot( NfromST, N ) > 0.0 ) {
+			if( dot( NfromST, N ) < 0.0 ) {

 				S *= -1.0;
 				T *= -1.0;