#if OPENGL
	#define SV_POSITION POSITION
	#define VS_SHADERMODEL vs_3_0
	#define PS_SHADERMODEL ps_3_0
#else
	#define VS_SHADERMODEL vs_4_0_level_9_1
	#define PS_SHADERMODEL ps_4_0_level_9_1
#endif

matrix WorldViewProjection;
float thickness;

struct VertexShaderInput
{
	float4 Position : POSITION0;
	float4 Color : COLOR0;
	float2 Normal : TEXCOORD0;
};

struct VertexShaderOutput
{
	float4 Position : SV_POSITION;
	float4 Color : COLOR0;
	float2 Normal : TEXCOORD0;
};

VertexShaderOutput MainVS(in VertexShaderInput input)
{
	VertexShaderOutput output = (VertexShaderOutput)0;
	float4 temp =  input.Position + (float4(input.Normal,0.0,0.0) * thickness);
	output.Position = mul(temp, WorldViewProjection);
	output.Color = input.Color;
	output.Normal = input.Normal;
	return output;
}

float4 MainPS(VertexShaderOutput input) : COLOR
{
	float feather = 0.2; //Fade off part
	float4 res = input.Color;
	float distFromLine = length(input.Normal);
    float alpha =  1.0 - ((clamp(distFromLine, (1.0 - feather),1.0) - (1.0 - feather)) / feather);	
	//res.a = alpha;
	return res;
}

technique BasicColorDrawing
{
	pass P0
	{
		AlphaBlendEnable = TRUE;
		DestBlend = INVSRCALPHA;
		SrcBlend = SRCALPHA;
		VertexShader = compile VS_SHADERMODEL MainVS();
		PixelShader = compile PS_SHADERMODEL MainPS();
	}
};