color.psh

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// GLOBALS //
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Texture2D shaderTexture;
SamplerState SampleType;

cbuffer LightBuffer
{
	float4 ambientColor;
	float4 diffuseColor;
	float3 lightDirection;
	float padding;
};

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// TYPEDEFS //
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struct PixelInputType
{
	float4 position : SV_POSITION;
	float4 color : COLOR;
	float2 tex : TEXCOORD0;
	float3 normal : NORMAL;
};

float4 ColorPixelShader(PixelInputType input) : SV_TARGET
{
	float3 lightDir;
	float lightIntensity;
	float4 color;

	// Set the default output color to the ambient light value for all pixels.
	color = ambientColor;

	// 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 final light color.
	color = saturate(color);

	// Multiply the texture pixel and the final diffuse color to get the final pixel color result.
	color = color * input.color;

	return color;
}