Using Scribe preprocessor @func@ instead of regular glsl function to solve the intel bug with the transform stack

libraries/gpu/src/gpu/Transform.slh

@@ -10,6 +10,7 @@
 <@if not GPU_TRANSFORM_STATE_SLH@>
 <@def GPU_TRANSFORM_STATE_SLH@>
 
+<@func declareStandardTransform()@>
 struct TransformObject { 
     mat4 _model;
     mat4 _modelInverse;
@@ -23,48 +24,19 @@ struct TransformCamera {
     vec4 _viewport;
 };
 
-vec4 transformModelToClipPos(TransformCamera camera, TransformObject object, vec4 pos) {
-<@if GPU_TRANSFORM_PROFILE == GPU_CORE@>
-    vec4 epos = (object._model * pos) + vec4(-pos.w * camera._viewInverse[3].xyz, 0.0);
-    return camera._projectionViewUntranslated * epos;
-    // Equivalent to the following but hoppefully a bit more accurate
-    //return camera._projection * camera._view * object._model * pos;
-<@else@>
-    return gl_ModelViewProjectionMatrix * pos;
-<@endif@>
-}
-
-vec3 transformModelToEyeDir(TransformCamera camera, TransformObject object, vec3 dir) {
-<@if GPU_TRANSFORM_PROFILE == GPU_CORE@>
-    vec3 mr0 = vec3(object._modelInverse[0].x, object._modelInverse[1].x, object._modelInverse[2].x);
-    vec3 mr1 = vec3(object._modelInverse[0].y, object._modelInverse[1].y, object._modelInverse[2].y);
-    vec3 mr2 = vec3(object._modelInverse[0].z, object._modelInverse[1].z, object._modelInverse[2].z);
-
-    vec3 mvc0 = vec3(dot(camera._viewInverse[0].xyz, mr0), dot(camera._viewInverse[0].xyz, mr1), dot(camera._viewInverse[0].xyz, mr2));
-    vec3 mvc1 = vec3(dot(camera._viewInverse[1].xyz, mr0), dot(camera._viewInverse[1].xyz, mr1), dot(camera._viewInverse[1].xyz, mr2));
-    vec3 mvc2 = vec3(dot(camera._viewInverse[2].xyz, mr0), dot(camera._viewInverse[2].xyz, mr1), dot(camera._viewInverse[2].xyz, mr2));
-
-    vec3 result = vec3(dot(mvc0, dir), dot(mvc1, dir), dot(mvc2, dir));
-
-    return result;
-<@else@>
-    return gl_NormalMatrix * dir;
-<@endif@>
-}
-
 <@if GPU_TRANSFORM_PROFILE == GPU_CORE@>
 uniform transformObjectBuffer {
-    TransformObject object;
+    TransformObject _object;
 };
 TransformObject getTransformObject() {
-    return object;
+    return _object;
 }
 
 uniform transformCameraBuffer {
-    TransformCamera camera;
+    TransformCamera _camera;
 };
 TransformCamera getTransformCamera() {
-    return camera;
+    return _camera;
 }
 
 <@else@>
@@ -114,6 +86,38 @@ TransformCamera getTransformCamera() {
 }
 
 <@endif@>
+<@endfunc@>
 
+
+<@func transformModelToClipPos(cameraTransform, objectTransform, modelPos, clipPos)@>
+<@if GPU_TRANSFORM_PROFILE == GPU_CORE@>
+    <!// Equivalent to the following but hoppefully a tad more accurate
+      //return camera._projection * camera._view * object._model * pos; !>
+    { // transformModelToClipPos
+        vec4 _eyepos = (<$objectTransform$>._model * <$modelPos$>) + vec4(-<$modelPos$>.w * <$cameraTransform$>._viewInverse[3].xyz, 0.0);
+        <$clipPos$> = <$cameraTransform$>._projectionViewUntranslated * _eyepos;
+    }
+<@else@>
+    <$clippos$> = gl_ModelViewProjectionMatrix * <$modelPos$>;
+<@endif@>
+<@endfunc@>
+
+<@func transformModelToEyeDir(cameraTransform, objectTransform, modelDir, eyeDir)@>
+<@if GPU_TRANSFORM_PROFILE == GPU_CORE@>
+    { // transformModelToEyeDir
+        vec3 mr0 = vec3(<$objectTransform$>._modelInverse[0].x, <$objectTransform$>._modelInverse[1].x, <$objectTransform$>._modelInverse[2].x);
+        vec3 mr1 = vec3(<$objectTransform$>._modelInverse[0].y, <$objectTransform$>._modelInverse[1].y, <$objectTransform$>._modelInverse[2].y);
+        vec3 mr2 = vec3(<$objectTransform$>._modelInverse[0].z, <$objectTransform$>._modelInverse[1].z, <$objectTransform$>._modelInverse[2].z);
+
+        vec3 mvc0 = vec3(dot(<$cameraTransform$>._viewInverse[0].xyz, mr0), dot(<$cameraTransform$>._viewInverse[0].xyz, mr1), dot(<$cameraTransform$>._viewInverse[0].xyz, mr2));
+        vec3 mvc1 = vec3(dot(<$cameraTransform$>._viewInverse[1].xyz, mr0), dot(<$cameraTransform$>._viewInverse[1].xyz, mr1), dot(<$cameraTransform$>._viewInverse[1].xyz, mr2));
+        vec3 mvc2 = vec3(dot(<$cameraTransform$>._viewInverse[2].xyz, mr0), dot(<$cameraTransform$>._viewInverse[2].xyz, mr1), dot(<$cameraTransform$>._viewInverse[2].xyz, mr2));
+
+        <$eyeDir$> = vec3(dot(mvc0, <$modelDir$>), dot(mvc1, <$modelDir$>), dot(mvc2, <$modelDir$>));
+    }
+<@else@>
+    <$eyeDir$> = gl_NormalMatrix * <$modelDir$>;
+<@endif@>
+<@endfunc@>
 
 <@endif@>

libraries/render-utils/src/model.slv

@@ -12,6 +12,9 @@
 //
 
 <@include gpu/Transform.slh@>
+
+<$declareStandardTransform()$>
+
 const int MAX_TEXCOORDS = 2;
 
 uniform mat4 texcoordMatrices[MAX_TEXCOORDS];
@@ -28,13 +31,11 @@ void main(void) {
     // and the texture coordinates
     gl_TexCoord[0] = texcoordMatrices[0] * vec4(gl_MultiTexCoord0.xy, 0.0, 1.0);
 
-    // use standard pipeline transform
+    // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
+    <$transformModelToClipPos(cam, obj, gl_Vertex, gl_Position)$>
+    <$transformModelToEyeDir(cam, obj, gl_Normal, normal.xyz)$>
 
-    gl_Position = transformModelToClipPos(cam, obj, vec4(gl_Vertex.xyz, 1.0));
-    
-    // transform and store the normal for interpolation
-    normal = vec4(normalize(transformModelToEyeDir(cam, obj, gl_Normal)), 0.0);
-
+    normal = vec4(normalize(normal.xyz), 0.0);
 }

libraries/render-utils/src/model_lightmap.slv

@@ -14,6 +14,8 @@
 
 <@include gpu/Transform.slh@>
 
+<$declareStandardTransform()$>
+
 const int MAX_TEXCOORDS = 2;
 
 uniform mat4 texcoordMatrices[MAX_TEXCOORDS];
@@ -35,12 +37,12 @@ void main(void) {
   //  interpolatedTexcoord1 = vec2(texcoordMatrices[1] * vec4(gl_MultiTexCoord0.xy, 0.0, 1.0)).xy;
     interpolatedTexcoord1 = vec2(texcoordMatrices[1] * vec4(texcoord1.xy, 0.0, 1.0)).xy;
 
-    // use standard pipeline transform
+    // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
-    gl_Position = transformModelToClipPos(cam, obj, gl_Vertex);
-    
-    // transform and store the normal for interpolation
-    normal = vec4(normalize(transformModelToEyeDir(cam, obj, gl_Normal)), 0.0);
+    <$transformModelToClipPos(cam, obj, gl_Vertex, gl_Position)$>
+    <$transformModelToEyeDir(cam, obj, gl_Normal, normal.xyz)$>
+
+    normal = vec4(normalize(normal.xyz), 0.0);
 }
 

libraries/render-utils/src/model_lightmap_normal_map.slv

@@ -14,6 +14,8 @@
 
 <@include gpu/Transform.slh@>
 
+<$declareStandardTransform()$>
+
 const int MAX_TEXCOORDS = 2;
 
 uniform mat4 texcoordMatrices[MAX_TEXCOORDS];
@@ -44,12 +46,13 @@ void main(void) {
     gl_TexCoord[0] = texcoordMatrices[0] * vec4(gl_MultiTexCoord0.xy, 0.0, 1.0);
     interpolatedTexcoord1 = vec2(texcoordMatrices[1] * vec4(texcoord1.xy, 0.0, 1.0)).xy;
    
-    // use standard pipeline transform
+    // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
-    gl_Position = transformModelToClipPos(cam, obj, gl_Vertex);
-    
-    // transform and store the normal for interpolation
-    interpolatedNormal = vec4(normalize(transformModelToEyeDir(cam, obj, gl_Normal)), 0.0);
-    interpolatedTangent = vec4(normalize(transformModelToEyeDir(cam, obj, tangent)), 0.0);
+    <$transformModelToClipPos(cam, obj, gl_Vertex, gl_Position)$>
+    <$transformModelToEyeDir(cam, obj, gl_Normal, interpolatedNormal.xyz)$>
+    <$transformModelToEyeDir(cam, obj, tangent, interpolatedTangent.xyz)$>
+
+    interpolatedNormal = vec4(normalize(interpolatedNormal.xyz), 0.0);
+    interpolatedTangent = vec4(normalize(interpolatedTangent.xyz), 0.0);
 }

libraries/render-utils/src/model_normal_map.slv

@@ -13,6 +13,8 @@
 //
 
 <@include gpu/Transform.slh@>
+
+<$declareStandardTransform()$>
 
 const int MAX_TEXCOORDS = 2;
 
@@ -38,12 +40,13 @@ void main(void) {
     // and the texture coordinates
     gl_TexCoord[0] = texcoordMatrices[0] * vec4(gl_MultiTexCoord0.xy, 0.0, 1.0);
     
-    // use standard pipeline transform
+    // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
-    gl_Position = transformModelToClipPos(cam, obj, gl_Vertex);
-    
-    // transform and store the normal for interpolation
-    interpolatedNormal = vec4(normalize(transformModelToEyeDir(cam, obj, gl_Normal)), 0.0);
-    interpolatedTangent = vec4(normalize(transformModelToEyeDir(cam, obj, tangent)), 0.0);
+    <$transformModelToClipPos(cam, obj, gl_Vertex, gl_Position)$>
+    <$transformModelToEyeDir(cam, obj, gl_Normal, interpolatedNormal.xyz)$>
+    <$transformModelToEyeDir(cam, obj, tangent, interpolatedTangent.xyz)$>
+
+    interpolatedNormal = vec4(normalize(interpolatedNormal.xyz), 0.0);
+    interpolatedTangent = vec4(normalize(interpolatedTangent.xyz), 0.0);
 }

libraries/render-utils/src/model_shadow.slv

@@ -12,10 +12,11 @@
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 //
 <@include gpu/Transform.slh@>
+<$declareStandardTransform()$>
 
 void main(void) {
-    // use standard pipeline transform
+    // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
-    gl_Position = transformModelToClipPos(cam, obj, gl_Vertex);
+    <$transformModelToClipPos(cam, obj, gl_Vertex, gl_Position)$>
 }

libraries/render-utils/src/skin_model.slv

@@ -13,6 +13,7 @@
 //
 
 <@include gpu/Transform.slh@>
+<$declareStandardTransform()$>
 
 const int MAX_TEXCOORDS = 2;
 const int MAX_CLUSTERS = 128;
@@ -43,11 +44,11 @@ void main(void) {
     // and the texture coordinates
     gl_TexCoord[0] = texcoordMatrices[0] * vec4(gl_MultiTexCoord0.xy, 0.0, 1.0);
     
-    // use standard pipeline transform
+    // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
-    gl_Position = transformModelToClipPos(cam, obj, position);
-    
-    // transform and store the normal for interpolation
-    normal = vec4(normalize(transformModelToEyeDir(cam, obj, normal.xyz)), 0.0);
+    <$transformModelToClipPos(cam, obj, position, gl_Position)$>
+    <$transformModelToEyeDir(cam, obj, normal.xyz, normal.xyz)$>
+
+    normal = vec4(normalize(normal.xyz), 0.0);
 }

libraries/render-utils/src/skin_model_normal_map.slv

@@ -13,6 +13,7 @@
 //
 
 <@include gpu/Transform.slh@>
+<$declareStandardTransform()$>
 
 const int MAX_TEXCOORDS = 2;
 const int MAX_CLUSTERS = 128;
@@ -44,22 +45,20 @@ void main(void) {
         interpolatedNormal += clusterMatrix * vec4(gl_Normal, 0.0) * clusterWeight;
         interpolatedTangent += clusterMatrix * vec4(tangent, 0.0) * clusterWeight;
     }
-  //  interpolatedNormal = gl_ModelViewMatrix * interpolatedNormal;
-  //  interpolatedTangent = gl_ModelViewMatrix * interpolatedTangent;
-    
+
     // pass along the diffuse color
     gl_FrontColor = gl_Color;
 
     // and the texture coordinates
     gl_TexCoord[0] = texcoordMatrices[0] * vec4(gl_MultiTexCoord0.xy, 0.0, 1.0);
     
-    gl_Position = gl_ModelViewProjectionMatrix * interpolatedPosition;
-
-    // use standard pipeline transform
+    // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
-    gl_Position = transformModelToClipPos(cam, obj, interpolatedPosition);
-
-    interpolatedNormal = vec4(normalize(transformModelToEyeDir(cam, obj, interpolatedNormal.xyz)), 0.0);
-    interpolatedTangent = vec4(normalize(transformModelToEyeDir(cam, obj, interpolatedTangent.xyz)), 0.0);
+    <$transformModelToClipPos(cam, obj, interpolatedPosition, gl_Position)$>
+    <$transformModelToEyeDir(cam, obj, gl_Normal, interpolatedNormal.xyz)$>
+    <$transformModelToEyeDir(cam, obj, tangent, interpolatedTangent.xyz)$>
+
+    interpolatedNormal = vec4(normalize(interpolatedNormal.xyz), 0.0);
+    interpolatedTangent = vec4(normalize(interpolatedTangent.xyz), 0.0);
 }

libraries/render-utils/src/skin_model_shadow.slv

@@ -13,6 +13,7 @@
 //
 
 <@include gpu/Transform.slh@>
+<$declareStandardTransform()$>
 
 const int MAX_CLUSTERS = 128;
 const int INDICES_PER_VERTEX = 4;
@@ -30,8 +31,8 @@ void main(void) {
         position += clusterMatrix * gl_Vertex * clusterWeight;
     }
 
-    // use standard pipeline transform
+   // standard transform
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
-    gl_Position = transformModelToClipPos(cam, obj, position);
+    <$transformModelToClipPos(cam, obj, position, gl_Position)$>
 }