+feat ( début reflection )

enginecustom/reflection.vs

@@ -0,0 +1,61 @@
+/////////////
+// GLOBALS //
+/////////////
+cbuffer MatrixBuffer
+{
+    matrix worldMatrix;
+    matrix viewMatrix;
+    matrix projectionMatrix;
+};
+
+cbuffer ReflectionBuffer
+{
+    matrix reflectionMatrix;
+};
+
+//////////////
+// TYPEDEFS //
+//////////////
+struct VertexInputType
+{
+    float4 position : POSITION;
+    float2 tex : TEXCOORD0;
+};
+
+struct PixelInputType
+{
+    float4 position : SV_POSITION;
+    float2 tex : TEXCOORD0;
+    float4 reflectionPosition : TEXCOORD1;
+};
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Vertex Shader
+////////////////////////////////////////////////////////////////////////////////
+PixelInputType ReflectionVertexShader(VertexInputType input)
+{
+    PixelInputType output;
+    matrix reflectProjectWorld;
+
+
+    // Change the position vector to be 4 units for proper matrix calculations.
+    input.position.w = 1.0f;
+
+    // Calculate the position of the vertex against the world, view, and projection matrices.
+    output.position = mul(input.position, worldMatrix);
+    output.position = mul(output.position, viewMatrix);
+    output.position = mul(output.position, projectionMatrix);
+    
+    // Store the texture coordinates for the pixel shader.
+    output.tex = input.tex;
+
+    // Create the reflection projection world matrix.
+    reflectProjectWorld = mul(reflectionMatrix, projectionMatrix);
+    reflectProjectWorld = mul(worldMatrix, reflectProjectWorld);
+
+    // Calculate the input position against the reflectProjectWorld matrix.
+    output.reflectionPosition = mul(input.position, reflectProjectWorld);
+
+    return output;
+}