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23 lines
648 B
23 lines
648 B
5 years ago
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ps.1.1
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;------------------------------------------------------------------------------
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; Draw a texture . . woo hoo!
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; t0 - texture
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;
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; The texture coordinates need to be defined as follows:
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; tc0 - texcoords
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;------------------------------------------------------------------------------
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def c0,1.0f, 1.0f, 1.0f, 1.0f
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tex t0 ; shadow color
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texkill t1 ; Clip
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texkill t2
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texkill t3 ; backface cull
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; Darkening equation, compute a color = (shadow color * shadow alpha + 1- shadow alpha)
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;sub r1, t0, v0.a ; r1 = shadow alpha
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lrp r0.rgb, t0.a, v0, c0 + ; r0.rgb = (shadow color * shadow alpha + 1 - shadow alpha)
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mov r0.a, c0.a ; r0.a = 1
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