A Add dummy methods to morph/skin tangents

src/aerys/minko/render/shader/part/animation/MorphingShaderPart.as

@@ -1,14 +1,13 @@
 package aerys.minko.render.shader.part.animation
 {
-	import aerys.minko.render.shader.Shader;
 	import aerys.minko.render.shader.SFloat;
+	import aerys.minko.render.shader.Shader;
 	import aerys.minko.render.shader.part.ShaderPart;
 	import aerys.minko.type.stream.format.VertexComponent;
 
 	/**
 	 * The shader part to handle morphing vertex animations.
 	 * @author Romain Gilliotte
-	 * 
 	 */
 	public class MorphingShaderPart extends ShaderPart
 	{
@@ -27,5 +26,9 @@ package aerys.minko.render.shader.part.animation
 			return getVertexAttribute(VertexComponent.NORMAL);
 		}
 
+		public function getMorphedTangent() : SFloat
+		{
+			return getVertexAttribute(VertexComponent.TANGENT);
+		}
 	}
-}
+}

src/aerys/minko/render/shader/part/animation/SkinningShaderPart.as

@@ -1,7 +1,7 @@
 package aerys.minko.render.shader.part.animation
 {
-	import aerys.minko.render.shader.Shader;
 	import aerys.minko.render.shader.SFloat;
+	import aerys.minko.render.shader.Shader;
 	import aerys.minko.render.shader.part.ShaderPart;
 	import aerys.minko.type.animation.SkinningMethod;
 	import aerys.minko.type.stream.format.VertexComponent;
@@ -60,6 +60,26 @@ package aerys.minko.render.shader.part.animation
 			}
 		}
 
+		public function skinTangent(inTangent : SFloat) : SFloat
+		{
+			var skinningMethod : uint = uint(meshBindings.getConstant('skinningMethod'));
+
+			switch (skinningMethod)
+			{
+				case SkinningMethod.MATRIX:
+					return matrixSkinTangent(inTangent);
+
+				case SkinningMethod.DUAL_QUATERNION:
+					return dualQuaternionSkinTangent(inTangent);
+
+				case SkinningMethod.DUAL_QUATERNION_SCALE:
+					return dualQuaternionScaleSkinTangent(inTangent);
+
+				default :
+					throw new Error('Unknown animation method.');
+			}
+		}
+
 		private function matrixSkinPosition(inVertexPosition : SFloat) : SFloat
 		{
 			var numBones			: uint		= uint(meshBindings.getConstant('skinningNumBones'));
@@ -167,6 +187,10 @@ package aerys.minko.render.shader.part.animation
 			return outVertexNormal;
 		}
 
+		private function matrixSkinTangent(inTangent:SFloat):SFloat
+		{
+			return inTangent;
+		}
 
 		private function dualQuaternionSkinPosition(inPosition : SFloat) : SFloat
 		{
@@ -338,6 +362,10 @@ package aerys.minko.render.shader.part.animation
 			return normalize(outNormal);
 		}
 
+		private function dualQuaternionSkinTangent(inTangent:SFloat):SFloat
+		{
+			return inTangent;
+		}
 
 		private function dualQuaternionScaleSkinPosition(inPosition : SFloat) : SFloat
 		{
@@ -348,6 +376,13 @@ package aerys.minko.render.shader.part.animation
 		{
 			throw new Error("This feature is still to be implemented. Use DualQuaternion of Matrix instead.");
 		}
+
+		private function dualQuaternionScaleSkinTangent(inTangent:SFloat):SFloat
+		{
+			throw new Error("This feature is still to be implemented. Use DualQuaternion of Matrix instead.");
+		}
+
+
 
 	}
 }

src/aerys/minko/render/shader/part/animation/VertexAnimationShaderPart.as

@@ -53,5 +53,20 @@ package aerys.minko.render.shader.part.animation
 
 			return vertexNormal;
 		}
+
+		public function getAnimatedVertexTangent() : SFloat
+		{
+			var vertexTangent : SFloat;
+
+			if (meshBindings.propertyExists('morphingEnabled'))
+				vertexTangent = _morphing.getMorphedTangent();
+			else
+				vertexTangent = getVertexAttribute(VertexComponent.TANGENT);
+
+			if (meshBindings.propertyExists('skinningMethod'))
+				vertexTangent = _skinning.skinTangent(vertexTangent);
+
+			return vertexTangent;
+		}
 	}
 }