94 lines
1.7 KiB
Plaintext
94 lines
1.7 KiB
Plaintext
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; This is a geometry Shader
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; Constants
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.constf myconst(0.0, 1.0, 2.0, 3.0)
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.alias zeros myconst.xxxx
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.alias ones myconst.yyyy
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; Outputs
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.out outpos position
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.out outtc0 texcoord0
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.out outtc1 texcoord1
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.out outtc2 texcoord2
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.out outclr color
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.proc main
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; === EMIT THE FIRST TRIANGLE - passed through as-is ===
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; Emit the first vertex of the triangle
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setemit 0
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mov outpos, v0
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mov outtc0, v1
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mov outtc1, v2
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mov outtc2, v3
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mov outclr, v4
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emit
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; Emit the second vertex of the triangle
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setemit 1
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mov outpos, v5
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mov outtc0, v6
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mov outtc1, v7
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mov outtc2, v8
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mov outclr, v9
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emit
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; Emit the third and final vertex of the triangle
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setemit 2, prim
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mov outpos, v10
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mov outtc0, v11
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mov outtc1, v12
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mov outtc2, v13
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mov outclr, v14
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emit
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; === EMIT THE SECOND TRIANGLE - translated and its color inverted ===
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; Adjust the coordinates of the first vertex & invert its color
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add r0, -myconst.xzxx, v0
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mul r0, myconst.zzyy, r0
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add r4.xyz, ones, -v4
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mov r4.w, v4
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; Adjust the coordinates of the second vertex & invert its color
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add r5, -myconst.xzxx, v5
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mul r5, myconst.zzyy, r5
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add r9.xyz, ones, -v9
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mov r9.w, v9
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; Adjust the coordinates of the third vertex & invert its color
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add r10, -myconst.xzxx, v10
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mul r10, myconst.zzyy, r10
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add r14.xyz, ones, -v14
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mov r14.w, v14
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; Emit the first vertex of the triangle
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setemit 0
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mov outpos, r0
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mov outtc0, v1
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mov outtc1, v2
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mov outtc2, v3
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mov outclr, r4
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emit
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; Emit the second vertex of the triangle
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setemit 1
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mov outpos, r5
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mov outtc0, v6
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mov outtc1, v7
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mov outtc2, v8
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mov outclr, r9
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emit
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; Emit the third and final vertex of the triangle
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setemit 2, prim
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mov outpos, r10
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mov outtc0, v11
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mov outtc1, v12
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mov outtc2, v13
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mov outclr, r14
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emit
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end
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.end
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