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enginecustom/Light.ps

@@ -0,0 +1,79 @@
+////////////////////////////////////////////////////////////////////////////////
+// Filename: light.ps
+////////////////////////////////////////////////////////////////////////////////
+
+
+/////////////
+// GLOBALS //
+/////////////
+Texture2D shaderTexture : register(t0);
+SamplerState SampleType : register(s0);
+cbuffer LightBuffer
+{
+    float4 ambientColor;
+    float4 diffuseColor;
+    float3 lightDirection;
+    float specularPower;
+    float4 specularColor;
+};
+//////////////
+// TYPEDEFS //
+//////////////
+struct PixelInputType
+{
+    float4 position : SV_POSITION;
+    float2 tex : TEXCOORD0;
+    float3 normal : NORMAL;
+    float3 viewDirection : TEXCOORD1;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// Pixel Shader
+////////////////////////////////////////////////////////////////////////////////
+float4 LightPixelShader(PixelInputType input) : SV_TARGET
+{
+    float4 textureColor;
+    float3 lightDir;
+    float lightIntensity;
+    float4 color;
+    float3 reflection;
+    float4 specular;
+
+
+    // Sample the pixel color from the texture using the sampler at this texture coordinate location.
+    textureColor = shaderTexture.Sample(SampleType, input.tex);
+
+    // Set the default output color to the ambient light value for all pixels.
+    color = ambientColor;
+
+    // Initialize the specular color.
+    specular = float4(0.0f, 0.0f, 0.0f, 0.0f);
+
+    // Invert the light direction for calculations.
+    lightDir = -lightDirection;
+
+    // Calculate the amount of light on this pixel.
+    lightIntensity = saturate(dot(input.normal, lightDir));
+
+    if(lightIntensity > 0.0f)
+    {
+        // Determine the final diffuse color based on the diffuse color and the amount of light intensity.
+        color += (diffuseColor * lightIntensity);
+
+        // Saturate the ambient and diffuse color.
+        color = saturate(color);
+
+        // Calculate the reflection vector based on the light intensity, normal vector, and light direction.
+        reflection = normalize(2.0f * lightIntensity * input.normal - lightDir); 
+
+        // Determine the amount of specular light based on the reflection vector, viewing direction, and specular power.
+        specular = pow(saturate(dot(reflection, input.viewDirection)), specularPower);
+    }
+
+    // Multiply the texture pixel and the final diffuse color to get the final pixel color result.
+    color = color * textureColor;
+        // Add the specular component last to the output color.
+    color = saturate(color + specular);
+
+    return color;
+}

enginecustom/Light.vs

@@ -0,0 +1,73 @@
+////////////////////////////////////////////////////////////////////////////////
+// Filename: light.vs
+////////////////////////////////////////////////////////////////////////////////
+
+
+/////////////
+// GLOBALS //
+/////////////
+cbuffer MatrixBuffer
+{
+    matrix worldMatrix;
+    matrix viewMatrix;
+    matrix projectionMatrix;
+};
+cbuffer CameraBuffer
+{
+    float3 cameraPosition;
+    float padding;
+};
+//////////////
+// 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 viewDirection : TEXCOORD1;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// Vertex Shader
+////////////////////////////////////////////////////////////////////////////////
+PixelInputType LightVertexShader(VertexInputType input)
+{
+    PixelInputType output;
+    float4 worldPosition;
+
+
+    // 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 viewing direction based on the position of the camera and the position of the vertex in the world.
+    output.viewDirection = cameraPosition.xyz - worldPosition.xyz;
+	
+    // Normalize the viewing direction vector.
+    output.viewDirection = normalize(output.viewDirection);
+
+    return output;
+}

enginecustom/enginecustom.vcxproj

@@ -43,6 +43,7 @@
     <ClInclude Include="textureshaderclass.h" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="Light.vs" />
     <None Include="packages.config" />
     <None Include="texture.ps" />
     <None Include="texture.vs" />

enginecustom/enginecustom.vcxproj.filters

@@ -98,6 +98,9 @@
     <None Include="texture.ps">
       <Filter>texture</Filter>
     </None>
+    <None Include="Light.vs">
+      <Filter>shader</Filter>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <Image Include="stone01.tga">