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Make Compatible with Single Pass Instanced Mode #9

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Make Compatible with Single Pass Instanced Mode #9

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37 changes: 35 additions & 2 deletions Assets/Wireframe/UCLA GameLab Wireframe Shaders.cginc
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Original file line number Diff line number Diff line change
@@ -1,12 +1,25 @@
//https://answers.unity.com/questions/1702908/geometry-shader-in-vr-stereo-rendering-mode-single.html

#include "UnityCG.cginc"
#include "UCLA GameLab Wireframe Functions.cginc"

// DATA STRUCTURES //

struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;

UNITY_VERTEX_INPUT_INSTANCE_ID
};

// Vertex to Geometry
struct UCLAGL_v2g
{
float4 pos : POSITION; // vertex position
float2 uv : TEXCOORD0; // vertex uv coordinate

UNITY_VERTEX_INPUT_INSTANCE_ID
};

// Geometry to UCLAGL_fragment
Expand All @@ -15,6 +28,9 @@ struct UCLAGL_g2f
float4 pos : POSITION; // fragment position
float2 uv : TEXCOORD0; // fragment uv coordinate
float3 dist : TEXCOORD1; // distance to each edge of the triangle

UNITY_VERTEX_INPUT_INSTANCE_ID
UNITY_VERTEX_OUTPUT_STEREO
};

// PARAMETERS //
Expand All @@ -27,11 +43,16 @@ sampler2D _MainTex; // Texture used for the line

// SHADER PROGRAMS //
// Vertex Shader
UCLAGL_v2g UCLAGL_vert(appdata_base v)
UCLAGL_v2g UCLAGL_vert(appdata v)
{
UCLAGL_v2g output;

UNITY_INITIALIZE_OUTPUT( UCLAGL_v2g, output );
UNITY_SETUP_INSTANCE_ID( v );
UNITY_TRANSFER_INSTANCE_ID( v, output );

output.pos = UnityObjectToClipPos(v.vertex);
output.uv = TRANSFORM_TEX (v.texcoord, _MainTex);
output.uv = TRANSFORM_TEX (v.uv, _MainTex);

return output;
}
Expand All @@ -45,18 +66,30 @@ void UCLAGL_geom(triangle UCLAGL_v2g p[3], inout TriangleStream<UCLAGL_g2f> triS
UCLAGL_g2f pIn;

// add the first point
UNITY_INITIALIZE_OUTPUT( UCLAGL_g2f, pIn );
UNITY_SETUP_INSTANCE_ID( p[0] );
UNITY_TRANSFER_INSTANCE_ID( p[0], pIn );
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO( pIn );
pIn.pos = p[0].pos;
pIn.uv = p[0].uv;
pIn.dist = float3(dist.x, 0, 0);
triStream.Append(pIn);

// add the second point
UNITY_INITIALIZE_OUTPUT( UCLAGL_g2f, pIn );
UNITY_SETUP_INSTANCE_ID( p[1] );
UNITY_TRANSFER_INSTANCE_ID( p[1], pIn );
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO( pIn );
pIn.pos = p[1].pos;
pIn.uv = p[1].uv;
pIn.dist = float3(0, dist.y, 0);
triStream.Append(pIn);

// add the third point
UNITY_INITIALIZE_OUTPUT( UCLAGL_g2f, pIn );
UNITY_SETUP_INSTANCE_ID( p[2] );
UNITY_TRANSFER_INSTANCE_ID( p[2], pIn );
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO( pIn );
pIn.pos = p[2].pos;
pIn.uv = p[2].uv;
pIn.dist = float3(0, 0, dist.z);
Expand Down