Chore: Add docs for MV matrix updates

Famous · Jun 19, 2015 · 88313b9 · 88313b9
1 parent 244494f
commit 88313b9
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/webgl-renderers/WebGLRenderer.js b/webgl-renderers/WebGLRenderer.js
@@ -582,7 +582,10 @@ WebGLRenderer.prototype.drawMeshes = function drawMeshes(renderState) {
 
         if (mesh.options) this.handleOptions(mesh.options, mesh);
 
+        // Model View Matrix from View Matrix multipled by the Mesh transform
         mat44.multiply(meshTransforms.values[0], renderState.viewTransform, mesh.uniformValues[1]);
+
+        // Normal Matrix calculated from the Model View Matrix
         mat33.normalFromMat4(meshTransforms.values[1], mesh.uniformValues[1]);
 
         this.program.setUniforms(mesh.uniformKeys, mesh.uniformValues);

diff --git a/webgl-shaders/VertexShader.glsl b/webgl-shaders/VertexShader.glsl
@@ -100,12 +100,14 @@ void main() {
     vec3 offsetPos,
          invertedNormals;
 
-    v_textureCoordinate = a_texCoord;
     v_normal = a_normals;
+    v_textureCoordinate = a_texCoord;
+
     offsetPos = (u_positionOffset.x < 0.0) ? a_pos + calculateOffset(u_positionOffset) : a_pos;
     offsetPos = clipSpacePos(offsetPos);
     mvPos = u_mvMatrix * vec4(offsetPos, 1.0);
     v_position = mvPos.xyz;
     v_eyeVector = (u_resolution * 0.5) - v_position;
+
     gl_Position = u_perspective * mvPos;
 }