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https://github.com/wheremyfoodat/Panda3DS.git
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73 lines
No EOL
1.5 KiB
Text
73 lines
No EOL
1.5 KiB
Text
; Example PICA200 vertex shader
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; Uniforms
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.fvec projection[4]
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; Constants
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.constf myconst(0.0, 1.0, -1.0, 0.1)
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.constf myconst2(0.3, 0.0, 0.0, 0.0)
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.alias zeros myconst.xxxx ; Vector full of zeros
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.alias ones myconst.yyyy ; Vector full of ones
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.constf magenta(0.8, 0.192, 0.812, 1.0)
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.constf cyan(0.137, 0.949, 0.906, 1.0)
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.constf lime(0.286, 0.929, 0.412, 1.0)
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.constf normalize_y(1.0, 1.0/128.0, 1.0, 1.0)
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; Outputs
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.out outpos position
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.out outclr color
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; Inputs (defined as aliases for convenience)
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.alias inpos v0
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.alias inclr v1
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.bool test
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.proc main
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; Force the w component of inpos to be 1.0
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mov r0.xyz, inpos
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mov r0.w, ones
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; outpos = projectionMatrix * inpos
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dp4 outpos.x, projection[0], r0
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dp4 outpos.y, projection[1], r0
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dp4 outpos.z, projection[2], r0
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dp4 outpos.w, projection[3], r0
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; Test litp via the output fragment colour
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; r1 = input colour
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mov r1, inclr
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; This should perform the following operation:
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; cmp = (x >= 0, w >= 0)
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; dest = ( max(x, 0), clamp(y, -128, +128 ), 0, max(w, 0) );
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litp r2, r1
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ifc cmp.x
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ifc cmp.y
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; cmp.x = 1, cmp.y = 1, write magenta
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mov outclr, magenta
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end
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.else
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; cmp.x = 1, cmp.y = 0, write cyan
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mov outclr, cyan
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end
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.end
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.else
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ifc cmp.y
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; cmp.x = 0, cmp.y
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mov outclr, lime
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end
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.end
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.end
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; cmp.x 0, cmp.y = 0, write output of litp to out colour, with y normalized to [-1, 1]
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mul r2.xyz, normalize_y, r2
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; Set alpha to one
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mov r2.a, ones.a
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mov outclr, r2
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end
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.end |