thesis-motion-guidance/KinectForWindows_UnityPro_2.0.1410/GreenScreen/Materials/GreenScreenShader.shader

Shader "DX11/GreenScreenShader" {
SubShader {
Pass {

CGPROGRAM
#pragma target 5.0

#pragma vertex vert
#pragma fragment frag

#include "UnityCG.cginc"

Texture2D _MainTex;

sampler SampleType;

struct vs_input {
	float4 pos : POSITION;
	float2 tex : TEXCOORD0;
};

StructuredBuffer<float2> depthCoordinates;
StructuredBuffer<float> bodyIndexBuffer;

struct ps_input {
	float4 pos : SV_POSITION;
    float2 tex : TEXCOORD0;
};

ps_input vert (vs_input v)
{
	ps_input o;
	o.pos = mul (UNITY_MATRIX_MVP, v.pos);
	o.tex = v.tex;
	// Flip x texture coordinate to mimic mirror.
	o.tex.x = 1 - v.tex.x;
	return o;
}

float4 frag (ps_input i, in uint id : SV_InstanceID) : COLOR
{
	float4 o;
	
	int colorWidth = (int)(i.tex.x * (float)1920);
	int colorHeight = (int)(i.tex.y * (float)1080);
	int colorIndex = (int)(colorWidth + colorHeight * (float)1920);
	
	o = float4(0, 1, 0, 1);
	
	if ((!isinf(depthCoordinates[colorIndex].x) && !isnan(depthCoordinates[colorIndex].x) && depthCoordinates[colorIndex].x != 0) || 
		!isinf(depthCoordinates[colorIndex].y) && !isnan(depthCoordinates[colorIndex].y) && depthCoordinates[colorIndex].y != 0)
	{
		// We have valid depth data coordinates from our coordinate mapper.  Find player mask from corresponding depth points.
		float player = bodyIndexBuffer[(int)depthCoordinates[colorIndex].x + (int)(depthCoordinates[colorIndex].y * 512)];
		if (player != 255)
		{
			o = _MainTex.Sample(SampleType, i.tex);
		}
	}
	
	return o;
}

ENDCG

}
}

Fallback Off
}