minor update - préparation sunlight

enginecustom/sunlight.vs

@@ -0,0 +1,78 @@
+/////////////
+// GLOBALS //
+/////////////
+cbuffer MatrixBuffer
+{
+    matrix worldMatrix;
+    matrix viewMatrix;
+    matrix projectionMatrix;
+};
+
+cbuffer CameraBuffer
+{
+    float3 cameraPosition;
+    float padding;
+};
+
+cbuffer SunLightPositionBuffer
+{
+    float4 sunPosition;
+};
+
+//////////////
+// TYPEDEFS //
+//////////////
+struct VertexInputType
+{
+    float4 position : POSITION;
+    float2 tex : TEXCOORD0;
+    float3 normal : NORMAL;
+};
+
+struct PixelInputType
+{
+    float4 position : SV_POSITION;
+    float2 tex : TEXCOORD0;
+    float3 normal : NORMAL;
+    float3 lightPos : TEXCOORD1;
+};
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Vertex Shader
+////////////////////////////////////////////////////////////////////////////////
+PixelInputType SunLightVertexShader(VertexInputType input)
+{
+    PixelInputType output;
+    float4 worldPosition;
+    int i;
+
+    // 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;
+    
+    // Calculate the normal vector against the world matrix only.
+    output.normal = mul(input.normal, (float3x3) worldMatrix);
+	
+    // Normalize the normal vector.
+    output.normal = normalize(output.normal);
+
+     // Calculate the position of the vertex in the world.
+    worldPosition = mul(input.position, worldMatrix);
+
+    // Determine the light positions based on the position of the lights and the position of the vertex in the world.
+    output.lightPos = sunPosition.xyz - worldPosition.xyz;
+
+    // Normalize the light position vectors.
+    output.lightPos = normalize(output.lightPos);
+    
+
+    return output;
+}