79 lines
3.1 KiB
Plaintext
79 lines
3.1 KiB
Plaintext
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/*========================================================================
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Copyright (c) 2017 PTC Inc. All Rights Reserved.
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Vuforia is a trademark of PTC Inc., registered in the United States and other
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countries.
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=========================================================================*/
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Shader "Custom/DepthContour" {
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Properties{
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_ContourColor("Contour Color", Color) = (1,1,1,1)
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_SurfaceColor("Surface Color", Color) = (0.5,0.5,0.5,1)
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_DepthThreshold("Depth Threshold", Float) = 0.002
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}
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SubShader {
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Tags { "Queue" = "Geometry" "RenderType" = "Transparent" }
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Pass {
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Cull Back
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Blend SrcAlpha OneMinusSrcAlpha
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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uniform sampler2D _CameraDepthTexture;
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uniform float4 _ContourColor;
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uniform float4 _SurfaceColor;
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uniform float _DepthThreshold;
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struct v2f {
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float4 pos : SV_POSITION;
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float4 screenPos : TEXCOORD0;
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float depth : TEXCOORD1;
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};
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v2f vert(appdata_base v)
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{
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v2f o;
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o.pos = UnityObjectToClipPos(v.vertex);
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o.screenPos = ComputeScreenPos(o.pos);
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COMPUTE_EYEDEPTH(o.depth);
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o.depth = (o.depth - _ProjectionParams.y) / (_ProjectionParams.z - _ProjectionParams.y);
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return o;
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}
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half4 frag(v2f i) : COLOR
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{
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float2 uv = i.screenPos.xy / i.screenPos.w;
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float du = 1.0 / _ScreenParams.x;
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float dv = 1.0 / _ScreenParams.y;
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float2 uv_X1 = uv + float2(du, 0.0);
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float2 uv_Y1 = uv + float2(0.0, dv);
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float2 uv_X2 = uv + float2(-du, 0.0);
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float2 uv_Y2 = uv + float2(0.0, -dv);
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float depth0 = Linear01Depth(UNITY_SAMPLE_DEPTH(tex2D(_CameraDepthTexture, uv)));
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float depthX1 = Linear01Depth(UNITY_SAMPLE_DEPTH(tex2D(_CameraDepthTexture, uv_X1)));
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float depthY1 = Linear01Depth(UNITY_SAMPLE_DEPTH(tex2D(_CameraDepthTexture, uv_Y1)));
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float depthX2 = Linear01Depth(UNITY_SAMPLE_DEPTH(tex2D(_CameraDepthTexture, uv_X2)));
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float depthY2 = Linear01Depth(UNITY_SAMPLE_DEPTH(tex2D(_CameraDepthTexture, uv_Y2)));
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float farDist = _ProjectionParams.z;
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float refDepthStep = _DepthThreshold / farDist;
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float depthStepX = max(abs(depth0 - depthX1), abs(depth0 - depthX2));
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float depthStepY = max(abs(depth0 - depthY1), abs(depth0 - depthY2));
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float maxDepthStep = length(float2(depthStepX, depthStepY));
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half contour = (maxDepthStep > refDepthStep) ? 1.0 : 0.0;
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return _SurfaceColor * (1.0 - contour) + _ContourColor * contour;
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}
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ENDCG
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}
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}
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Fallback "Diffuse"
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}
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