Facial animation support

[platform/core/uifw/dali-toolkit.git] / dali-scene-loader / internal / graphics / shaders / default-physically-based-shader.vert

diff --git a/dali-scene-loader/internal/graphics/shaders/default-physically-based-shader.vert b/dali-scene-loader/internal/graphics/shaders/default-physically-based-shader.vert
index e9381c5..ea4fd32 100644 (file)
--- a/dali-scene-loader/internal/graphics/shaders/default-physically-based-shader.vert
+++ b/dali-scene-loader/internal/graphics/shaders/default-physically-based-shader.vert
@@ -1,5 +1,9 @@
 #version 300 es
 
+// Original Code
+// https://github.com/KhronosGroup/glTF-Sample-Viewer/blob/glTF-WebGL-PBR/shaders/pbr-vert.glsl
+// Commit dc84b5e374fb3d23153d2248a338ef88173f9eb6
+
 #ifdef HIGHP
   precision highp float;
 #else
@@ -9,23 +13,29 @@
 in vec3 aPosition;
 in vec2 aTexCoord;
 in vec3 aNormal;
+
+#ifdef VEC4_TANGENT
+in vec4 aTangent;
+#else
 in vec3 aTangent;
+#endif
+
+in vec4 aVertexColor;
 
 #ifdef MORPH
-  uniform sampler2D sBlendShapeGeometry;
+  uniform highp sampler2D sBlendShapeGeometry;
 #endif
 
 out vec2 vUV;
-out vec3 vNormal;
-out vec3 vTangent;
-out vec3 vViewVec;
+out lowp mat3 vTBN;
+out lowp vec4 vColor;
+out highp vec3 vPositionToCamera;
 
-uniform highp mat4 uMvpMatrix;
 uniform highp mat4 uViewMatrix;
 uniform mat3 uNormalMatrix;
 uniform mat4 uModelMatrix;
-uniform mat4 uModelView;
 uniform mat4 uProjection;
+uniform lowp float uHasVertexColor;
 
 #ifdef SKINNING
   in vec4 aJoints;
@@ -36,35 +46,39 @@ uniform mat4 uProjection;
 
 #ifdef MORPH
 #define MAX_BLEND_SHAPE_NUMBER 128
-uniform int uNumberOfBlendShapes;                                   ///< Total number of blend shapes loaded.
-uniform float uBlendShapeWeight[MAX_BLEND_SHAPE_NUMBER];            ///< The weight of each blend shape.
+uniform float uNumberOfBlendShapes;                                 ///< Total number of blend shapes loaded.
+uniform highp float uBlendShapeWeight[MAX_BLEND_SHAPE_NUMBER];            ///< The weight of each blend shape.
 #ifdef MORPH_VERSION_2_0
 uniform float uBlendShapeUnnormalizeFactor;                         ///< Factor used to unnormalize the geometry of the blend shape.
 #else
 uniform float uBlendShapeUnnormalizeFactor[MAX_BLEND_SHAPE_NUMBER]; ///< Factor used to unnormalize the geometry of the blend shape.
 #endif
-uniform int uBlendShapeComponentSize;                               ///< The size in the texture of either the vertices, normals or tangents. Used to calculate the offset to address them.
+uniform float uBlendShapeComponentSize;                             ///< The size in the texture of either the vertices, normals or tangents. Used to calculate the offset to address them.
 #endif
 
 void main()
 {
-  vec4 position = vec4(aPosition, 1.0);
-  vec3 normal = aNormal;
-  vec3 tangent = aTangent;
+  highp vec4 position = vec4(aPosition, 1.0);
+  highp vec3 normal = aNormal;
+  highp vec3 tangent = aTangent.xyz;
 
 #ifdef MORPH
   int width = textureSize( sBlendShapeGeometry, 0 ).x;
 
   int blendShapeBufferOffset = 0;
-  for( int index = 0; index < uNumberOfBlendShapes; ++index )
+  int blendShapeComponentSize = int(uBlendShapeComponentSize);
+  int numberOfBlendShapes = int(uNumberOfBlendShapes);
+
+  for( int index = 0; index < numberOfBlendShapes; ++index )
   {
+    highp vec3 diff = vec3(0.0);
+
 #ifdef MORPH_POSITION
     // Calculate the index to retrieve the geometry from the texture.
     int vertexId = gl_VertexID + blendShapeBufferOffset;
     int x = vertexId % width;
     int y = vertexId / width;
 
-    vec3 diff = vec3(0.0);
     // Retrieves the blend shape geometry from the texture, unnormalizes it and multiply by the weight.
     if( 0.0 != uBlendShapeWeight[index] )
     {
@@ -79,12 +93,12 @@ void main()
 
     position.xyz += diff;
 
-    blendShapeBufferOffset += uBlendShapeComponentSize;
+    blendShapeBufferOffset += blendShapeComponentSize;
 #endif
 
 #ifdef MORPH_NORMAL
     // Calculate the index to retrieve the normal from the texture.
-    vertexId = gl_VertexID + blendShapeBufferOffset;
+    vertexId = gl_VertexID + int(blendShapeBufferOffset);
     x = vertexId % width;
     y = vertexId / width;
 
@@ -96,7 +110,7 @@ void main()
 
     normal += diff.xyz;
 
-    blendShapeBufferOffset += uBlendShapeComponentSize;
+    blendShapeBufferOffset += blendShapeComponentSize;
 #endif
 
 #ifdef MORPH_TANGENT
@@ -113,14 +127,14 @@ void main()
 
     tangent += diff.xyz;
 
-    blendShapeBufferOffset += uBlendShapeComponentSize;
+    blendShapeBufferOffset += blendShapeComponentSize;
 #endif
   }
 
 #endif
 
 #ifdef SKINNING
-  mat4 bone = uBone[int(aJoints.x)] * aWeights.x +
+  highp mat4 bone = uBone[int(aJoints.x)] * aWeights.x +
     uBone[int(aJoints.y)] * aWeights.y +
     uBone[int(aJoints.z)] * aWeights.z +
     uBone[int(aJoints.w)] * aWeights.w;
@@ -129,15 +143,16 @@ void main()
   tangent = (bone * vec4(tangent, 0.0)).xyz;
 #endif
 
-  vec4 vPosition = uModelMatrix * position;
-
-  vNormal = normalize(uNormalMatrix * normal);
+  highp vec4 positionW = uModelMatrix * position;
+  highp vec4 positionV = uViewMatrix * positionW;
 
-  vTangent = normalize(uNormalMatrix * tangent);
+  vPositionToCamera = transpose(mat3(uViewMatrix)) * -vec3(positionV.xyz / positionV.w);
 
-
-  vec4 viewPosition = uViewMatrix * vPosition;
-  gl_Position = uProjection * viewPosition;
+  vec3 bitangent = cross(normal, tangent);
+#ifdef VEC4_TANGENT
+  bitangent *= aTangent.w;
+#endif
+  vTBN = mat3(uModelMatrix) * mat3(tangent, bitangent, normal);
 
 #ifdef FLIP_V
   vUV = vec2(aTexCoord.x, 1.0 - aTexCoord.y);
@@ -145,5 +160,7 @@ void main()
   vUV = aTexCoord;
 #endif
 
-  vViewVec = viewPosition.xyz;
+  vColor = mix(vec4(1.0f), aVertexColor, uHasVertexColor);
+
+  gl_Position = uProjection * positionV;
 }