투명디스플레이 연구사업

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Kinect/DepthShader" {

    Properties {

        _MainTex ("Base (RGB)", 2D) = "black" {}

    }

	SubShader {

		Pass {

			ZTest Always Cull Off ZWrite Off

			Fog { Mode off }

			CGPROGRAM

			#pragma target 5.0

			//#pragma enable_d3d11_debug_symbols

			#pragma vertex vert

			#pragma fragment frag

			#include "UnityCG.cginc"

			uniform sampler2D _MainTex;

			uniform float _TexResX;

			uniform float _TexResY;

			uniform float _TotalPoints;

			uniform int _FirstUserIndex;

			StructuredBuffer<float> _DepthBuffer;

			StructuredBuffer<float> _HistBuffer;

			StructuredBuffer<float> _BodyIndexBuffer;

			struct v2f {

				float4 pos : SV_POSITION;

			    float2 uv : TEXCOORD0;

			};

			v2f vert (appdata_base v)

			{

				v2f o;

				o.pos = UnityObjectToClipPos (v.vertex);

				o.uv = v.texcoord;

				return o;

			}

			float4 frag (v2f i) : COLOR

			{

				int dx = (int)(i.uv.x * _TexResX);

				int dy = (int)(i.uv.y * _TexResY);

				int di = (int)(dx + dy * _TexResX);

				//float player = tex2D(_MainTex, i.uv).w;

				//int playerIndex = (int)(player * 255);

				float playerIndex = (int)_BodyIndexBuffer[di];

				//if (player != 0)

				if (playerIndex != 255)

				{

					int depth = (int)_DepthBuffer[di];

					float hist = 1 - (_HistBuffer[depth] / _TotalPoints);

					if((playerIndex % 8) == _FirstUserIndex)

					{

						return float4(hist, hist, 0, 1);  // yellow

					}

					else

					{

						switch(playerIndex % 4)

						{

							case 0:

								return float4(hist, 0, 0, 0.9);  // red

							case 1:

								return float4(0, hist, 0, 0.9);  // green

							case 2:

								return float4(0, 0, hist, 0.9);  // blue

							case 3:

								return float4(hist, 0, hist, 0.9);  // magenta

						}

					}

					return float4(hist, hist, hist, 1); // white

				}

//				else

//				{

//					float depth = _DepthBuffer[di];

//					if(depth == 0) depth = 5000;

//					float hist = 1 - depth / 5000;

//					

//					return float4(hist, hist, hist, 1); // gray

//				}

				return float4(0, 0, 0, 0);  // invisible

			}

			ENDCG

		}

	}

	Fallback Off

}