Simple Ambient Light Shader

// ----------------------------------------------------------------------------------
// Parameters
// ----------------------------------------------------------------------------------
// Global matrix paramters
float4x4 World;
float4x4 View;
float4x4 Projection;

// Ambient Light Parameters
float4 AmbientColor = float4(1, 1, 1, 1);
float AmbientIntensity = 0.1;

// Diffuse Light Parameters

// ----------------------------------------------------------------------------------
// States
// ----------------------------------------------------------------------------------
RasterizerState rsSolid
{
	FillMode = Solid;
	CullMode = NONE;
	FrontCounterClockwise = false;
};

// ----------------------------------------------------------------------------------
// Inputs / Outputs
// ----------------------------------------------------------------------------------
struct VertexShaderInput
{
	float4 Position : POSITION;
	float2 Texture : TEXCOORD;
	float4 Color : COLOR;
	float3 Normal : NORMAL;
};

struct PixelShaderInput
{
	float4 Position : SV_POSITION;
	float2 Texture : TEXCOORD;
	float4 Color : COLOR;
};

// ----------------------------------------------------------------------------------
// Shaders
// ----------------------------------------------------------------------------------
PixelShaderInput VS_Ambient(VertexShaderInput input)
{
	PixelShaderInput i = (PixelShaderInput)0;

	i.Position = mul(input.Position, World);
	i.Position = mul(i.Position, View);
	i.Position = mul(i.Position, Projection);

	i.Texture = input.Texture;
	i.Color = input.Color;

	return i;
}

float4 PS_Ambient(PixelShaderInput input) : SV_Target
{
	return mul(input.Color, AmbientColor * AmbientIntensity);
}

// ----------------------------------------------------------------------------------
// Techniques
// ----------------------------------------------------------------------------------
technique10 Ambient
{
	pass P0
	{
		SetVertexShader(CompileShader(vs_4_0, VS_Ambient()));
		SetGeometryShader(NULL);
		SetPixelShader(CompileShader(ps_4_0, PS_Ambient()));
		SetRasterizerState(rsSolid);
	}
}