319 lines
13 KiB
GLSL
319 lines
13 KiB
GLSL
//======= Copyright (c) Valve Corporation, All rights reserved. ===============
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//
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// Purpose: Used to show the outline of the object
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//
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//=============================================================================
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// UNITY_SHADER_NO_UPGRADE
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Shader "Valve/VR/Silhouette"
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{
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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Properties
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{
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g_vOutlineColor( "Outline Color", Color ) = ( .5, .5, .5, 1 )
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g_flOutlineWidth( "Outline width", Range ( .001, 0.03 ) ) = .005
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g_flCornerAdjust( "Corner Adjustment", Range( 0, 2 ) ) = .5
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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CGINCLUDE
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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#pragma target 5.0
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#pragma multi_compile_instancing
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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#include "UnityCG.cginc"
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#if UNITY_VERSION >= 201810
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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UNITY_INSTANCING_BUFFER_START( Props )
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UNITY_DEFINE_INSTANCED_PROP( float4, g_vOutlineColor )
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UNITY_DEFINE_INSTANCED_PROP( float, g_flOutlineWidth )
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UNITY_DEFINE_INSTANCED_PROP( float, g_flCornerAdjust )
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UNITY_INSTANCING_BUFFER_END( Props )
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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struct VS_INPUT
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{
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float4 vPositionOs : POSITION;
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float3 vNormalOs : NORMAL;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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struct PS_INPUT
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{
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float4 vPositionOs : TEXCOORD0;
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float3 vNormalOs : TEXCOORD1;
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float4 vPositionPs : SV_POSITION;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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UNITY_VERTEX_OUTPUT_STEREO
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};
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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PS_INPUT MainVs( VS_INPUT i )
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{
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PS_INPUT o;
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UNITY_SETUP_INSTANCE_ID( i );
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UNITY_INITIALIZE_OUTPUT( PS_INPUT, o );
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO( o );
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o.vPositionOs.xyzw = i.vPositionOs.xyzw;
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o.vNormalOs.xyz = i.vNormalOs.xyz;
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o.vPositionPs = UnityObjectToClipPos( i.vPositionOs.xyzw );
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return o;
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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PS_INPUT Extrude( PS_INPUT vertex )
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{
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PS_INPUT extruded = vertex;
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// Offset along normal in projection space
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float3 vNormalVs = mul( ( float3x3 )UNITY_MATRIX_IT_MV, vertex.vNormalOs.xyz );
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float2 vOffsetPs = TransformViewToProjection( vNormalVs.xy );
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vOffsetPs.xy = normalize( vOffsetPs.xy );
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// Calculate position
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extruded.vPositionPs = UnityObjectToClipPos( vertex.vPositionOs.xyzw );
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extruded.vPositionPs.xy += vOffsetPs.xy * extruded.vPositionPs.w * UNITY_ACCESS_INSTANCED_PROP( Props, g_flOutlineWidth );
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return extruded;
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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[maxvertexcount(18)]
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void ExtrudeGs( triangle PS_INPUT inputTriangle[3], inout TriangleStream<PS_INPUT> outputStream )
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{
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UNITY_SETUP_INSTANCE_ID ( inputTriangle[ 0 ] )
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UNITY_SETUP_INSTANCE_ID ( inputTriangle[ 1 ] )
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UNITY_SETUP_INSTANCE_ID ( inputTriangle[ 2 ] )
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DEFAULT_UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX ( inputTriangle[ 0 ] )
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DEFAULT_UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX ( inputTriangle[ 1 ] )
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DEFAULT_UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX ( inputTriangle[ 2 ] )
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PS_INPUT inputTriangle0 = inputTriangle[ 0 ];
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PS_INPUT inputTriangle1 = inputTriangle[ 1 ];
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PS_INPUT inputTriangle2 = inputTriangle[ 2 ];
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float3 a = normalize(inputTriangle0.vPositionOs.xyz - inputTriangle1.vPositionOs.xyz);
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float3 b = normalize(inputTriangle1.vPositionOs.xyz - inputTriangle2.vPositionOs.xyz);
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float3 c = normalize(inputTriangle2.vPositionOs.xyz - inputTriangle0.vPositionOs.xyz);
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inputTriangle0.vNormalOs = inputTriangle0.vNormalOs + normalize( a - c) * UNITY_ACCESS_INSTANCED_PROP( Props, g_flCornerAdjust );
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inputTriangle1.vNormalOs = inputTriangle1.vNormalOs + normalize(-a + b) * UNITY_ACCESS_INSTANCED_PROP( Props, g_flCornerAdjust );
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inputTriangle2.vNormalOs = inputTriangle2.vNormalOs + normalize(-b + c) * UNITY_ACCESS_INSTANCED_PROP( Props, g_flCornerAdjust );
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PS_INPUT extrudedTriangle0;
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PS_INPUT extrudedTriangle1;
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PS_INPUT extrudedTriangle2;
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UNITY_INITIALIZE_OUTPUT( PS_INPUT, extrudedTriangle0 );
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UNITY_INITIALIZE_OUTPUT( PS_INPUT, extrudedTriangle0 );
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UNITY_INITIALIZE_OUTPUT( PS_INPUT, extrudedTriangle0 );
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extrudedTriangle0 = Extrude( inputTriangle0 );
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extrudedTriangle1 = Extrude( inputTriangle1 );
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extrudedTriangle2 = Extrude( inputTriangle2 );
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outputStream.Append( inputTriangle0 );
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outputStream.Append( extrudedTriangle0 );
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outputStream.Append( inputTriangle1 );
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outputStream.Append( extrudedTriangle0 );
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outputStream.Append( extrudedTriangle1 );
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outputStream.Append( inputTriangle1 );
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outputStream.Append( inputTriangle1 );
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outputStream.Append( extrudedTriangle1 );
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append( inputTriangle1 );
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append( inputTriangle2 );
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outputStream.Append( inputTriangle2 );
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append( inputTriangle0 );
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append( extrudedTriangle0 );
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outputStream.Append( inputTriangle0 );
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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fixed4 MainPs( PS_INPUT i ) : SV_Target
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{
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO( i );
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return UNITY_ACCESS_INSTANCED_PROP( Props, g_vOutlineColor );
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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fixed4 NullPs( PS_INPUT i ) : SV_Target
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{
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO( i );
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return float4( 1.0, 0.0, 1.0, 1.0 );
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}
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#else
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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float4 g_vOutlineColor;
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float g_flOutlineWidth;
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float g_flCornerAdjust;
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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struct VS_INPUT
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{
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float4 vPositionOs : POSITION;
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float3 vNormalOs : NORMAL;
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};
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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struct PS_INPUT
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{
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float4 vPositionOs : TEXCOORD0;
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float3 vNormalOs : TEXCOORD1;
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float4 vPositionPs : SV_POSITION;
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};
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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PS_INPUT MainVs( VS_INPUT i )
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{
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PS_INPUT o;
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o.vPositionOs.xyzw = i.vPositionOs.xyzw;
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o.vNormalOs.xyz = i.vNormalOs.xyz;
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#if UNITY_VERSION >= 540
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o.vPositionPs = UnityObjectToClipPos( i.vPositionOs.xyzw );
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#else
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o.vPositionPs = mul( UNITY_MATRIX_MVP, i.vPositionOs.xyzw );
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#endif
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return o;
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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PS_INPUT Extrude( PS_INPUT vertex )
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{
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PS_INPUT extruded = vertex;
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// Offset along normal in projection space
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float3 vNormalVs = mul( ( float3x3 )UNITY_MATRIX_IT_MV, vertex.vNormalOs.xyz );
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float2 vOffsetPs = TransformViewToProjection( vNormalVs.xy );
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vOffsetPs.xy = normalize( vOffsetPs.xy );
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// Calculate position
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#if UNITY_VERSION >= 540
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extruded.vPositionPs = UnityObjectToClipPos( vertex.vPositionOs.xyzw );
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#else
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extruded.vPositionPs = mul( UNITY_MATRIX_MVP, vertex.vPositionOs.xyzw );
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#endif
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extruded.vPositionPs.xy += vOffsetPs.xy * extruded.vPositionPs.w * g_flOutlineWidth;
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return extruded;
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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[maxvertexcount(18)]
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void ExtrudeGs( triangle PS_INPUT inputTriangle[3], inout TriangleStream<PS_INPUT> outputStream )
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{
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float3 a = normalize(inputTriangle[0].vPositionOs.xyz - inputTriangle[1].vPositionOs.xyz);
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float3 b = normalize(inputTriangle[1].vPositionOs.xyz - inputTriangle[2].vPositionOs.xyz);
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float3 c = normalize(inputTriangle[2].vPositionOs.xyz - inputTriangle[0].vPositionOs.xyz);
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inputTriangle[0].vNormalOs = inputTriangle[0].vNormalOs + normalize( a - c) * g_flCornerAdjust;
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inputTriangle[1].vNormalOs = inputTriangle[1].vNormalOs + normalize(-a + b) * g_flCornerAdjust;
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inputTriangle[2].vNormalOs = inputTriangle[2].vNormalOs + normalize(-b + c) * g_flCornerAdjust;
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PS_INPUT extrudedTriangle0 = Extrude( inputTriangle[0] );
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PS_INPUT extrudedTriangle1 = Extrude( inputTriangle[1] );
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PS_INPUT extrudedTriangle2 = Extrude( inputTriangle[2] );
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outputStream.Append( inputTriangle[0] );
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outputStream.Append( extrudedTriangle0 );
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outputStream.Append( inputTriangle[1] );
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outputStream.Append( extrudedTriangle0 );
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outputStream.Append( extrudedTriangle1 );
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outputStream.Append( inputTriangle[1] );
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outputStream.Append( inputTriangle[1] );
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outputStream.Append( extrudedTriangle1 );
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append( inputTriangle[1] );
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append( inputTriangle[2] );
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outputStream.Append( inputTriangle[2] );
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append(inputTriangle[0]);
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outputStream.Append( extrudedTriangle2 );
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outputStream.Append( extrudedTriangle0 );
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outputStream.Append( inputTriangle[0] );
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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fixed4 MainPs( PS_INPUT i ) : SV_Target
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{
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return g_vOutlineColor;
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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fixed4 NullPs( PS_INPUT i ) : SV_Target
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{
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return float4( 1.0, 0.0, 1.0, 1.0 );
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}
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#endif
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ENDCG
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SubShader
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{
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Tags { "RenderType"="Outline" "Queue" = "Geometry-1" }
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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// Render the object with stencil=1 to mask out the part that isn't the silhouette
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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Pass
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{
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Tags { "LightMode" = "Always" }
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ColorMask 0
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Cull Off
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ZWrite Off
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Stencil
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{
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Ref 1
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Comp always
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Pass replace
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}
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CGPROGRAM
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#pragma vertex MainVs
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#pragma fragment NullPs
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ENDCG
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}
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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// Render the outline by extruding along vertex normals and using the stencil mask previously rendered. Only render depth, so that the final pass executes
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// once per fragment (otherwise alpha blending will look bad).
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//-------------------------------------------------------------------------------------------------------------------------------------------------------------
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Pass
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{
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Tags { "LightMode" = "Always" }
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Cull Off
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ZWrite On
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Stencil
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{
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Ref 1
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Comp notequal
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Pass keep
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Fail keep
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}
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CGPROGRAM
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#pragma vertex MainVs
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#pragma geometry ExtrudeGs
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#pragma fragment MainPs
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ENDCG
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}
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}
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} |