soundvision/UnityProject/Assets/AzureKinectExamples/Resources/UserBlendShader.shader

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// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "Kinect/UserBlendShader"
{
Properties
{
_MainTex ("MainTex", 2D) = "white" {}
_BackTex ("BackTex", 2D) = "white" {}
_ColorTex ("ColorTex", 2D) = "white" {}
_Threshold ("Depth Threshold", Range(0, 0.5)) = 0.1
_BlurOffset("Blur Offset", Range(0, 10)) = 2
}
SubShader
{
Tags { "Queue"="Transparent" "RenderType"="Transparent" }
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"
sampler2D _MainTex;
//float4 _MainTex_ST;
uniform float4 _MainTex_TexelSize;
sampler2D _CameraDepthTexture;
uniform sampler2D _BackTex;
uniform sampler2D _ColorTex;
uniform float _Threshold;
uniform int _BlurOffset;
uniform float _ColorResX;
uniform float _ColorResY;
uniform float _ColorScaleX;
uniform float _ColorOfsX;
uniform float _ColorMulX;
uniform float _ColorOfsY;
uniform float _ColorMulY;
StructuredBuffer<uint> _DepthMap;
struct v2f
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
float2 uv2 : TEXCOORD1;
float4 scrPos : TEXCOORD2;
};
v2f vert (appdata_base v)
{
v2f o;
o.pos = UnityObjectToClipPos (v.vertex);
o.uv = v.texcoord;
o.uv2.x = o.uv.x;
o.uv2.y = 1 - o.uv.y;
o.scrPos = ComputeScreenPos(o.pos);
return o;
}
half getKinectAlpha(int2 cxy, float camDepth)
{
int rcCount = 2 * _BlurOffset + 1;
int maxCount = rcCount * rcCount;
int ci0 = (int)((cxy.x - _BlurOffset) + (cxy.y - _BlurOffset) * _ColorResX);
int pixCount = 0;
for (int iY = -_BlurOffset; iY <= _BlurOffset; iY++)
{
uint ci = ci0;
for (int iX = -_BlurOffset; iX <= _BlurOffset; iX++, ci++)
{
uint depth2 = _DepthMap[ci >> 1];
//uint depth = (ci % 2 == 0 ? depth2 <<= 16 : depth2) >> 16;
uint depth = ci & 1 != 0 ? depth2 >> 16 : depth2 & 0xffff;
if (depth != 0)
{
float kinDepth = depth / 1000.0;
if ((camDepth < 0.1 || camDepth >= 10.0) || (kinDepth >= 0.1 && camDepth > (kinDepth + _Threshold)))
{
pixCount++;
}
}
else
{
if (camDepth < 0.1 || camDepth >= 10.0)
{
pixCount++;
}
}
}
ci0 += _ColorResX;
}
half alpha = (half)pixCount / (half)maxCount;
return alpha;
}
half4 frag (v2f i) : COLOR
{
float camDepth = LinearEyeDepth (tex2Dproj(_CameraDepthTexture, UNITY_PROJ_COORD(i.scrPos)).r);
//float camDepth01 = Linear01Depth (tex2Dproj(_CameraDepthTexture, UNITY_PROJ_COORD(i.scrPos)).r);
float2 ctUv = float2(_ColorOfsX + i.uv.x * _ColorMulX, 1.0 - i.uv.y /**_ColorOfsY + i.uv.y * _ColorMulY*/);
#if UNITY_UV_STARTS_AT_TOP
if (_MainTex_TexelSize.y < 0.0)
{
ctUv.y = 1.0 - ctUv.y;
}
#endif
// for non-flipped textures
float2 ctUv2 = float2(ctUv.x, 1.0 - ctUv.y);
if (_ColorScaleX < 0.0)
{
ctUv.x = 1.0 - ctUv.x;
}
uint cx = (int)(ctUv.x * _ColorResX);
uint cy = (int)(ctUv.y * _ColorResY);
half4 clrBack = tex2D(_BackTex, ctUv2);
half4 clrFront = tex2D(_ColorTex, ctUv);
half3 clrBlend = clrBack.rgb * (1.0 - clrFront.a) + clrFront.rgb * clrFront.a;
half4 clrMain = tex2D(_MainTex, i.uv);
half kinAlpha = getKinectAlpha(int2(cx, cy), camDepth);
//clrBlend = lerp(clrMain.rgb, clrBlend.rgb, kinAlpha);
clrBlend = clrMain.rgb * (1.0 - kinAlpha) + clrBlend * kinAlpha;
//uint ci = cx + cy * _ColorResX;
//uint depth2 = _DepthMap[ci >> 1];
//uint depth = ci & 1 != 0 ? depth2 >> 16 : depth2 & 0xffff;
//float kinDepth = (float)depth / 4000.0;
//return half4(kinDepth, kinDepth, kinDepth, 1.0);
//bool mask = depth <= 1000;
//clrBlend = half4(kinDepth, kinDepth, kinDepth, 1.0);
//clrBlend = clrMain.rgb * (1 - mask) + clrBlend * mask;
return half4(clrBlend, 1.0);
}
ENDCG
}
}
FallBack "Diffuse"
}