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https://github.com/thug1src/thug.git
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70 lines
2.8 KiB
GLSL
70 lines
2.8 KiB
GLSL
xvs.1.1
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#include "anim_vertdefs.h"
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#pragma screenspace
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;------------------------------------------------------------------------------
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; Bone space transforms
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;------------------------------------------------------------------------------
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; Get matrix index 1
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mov a0.x, VSIN_REG_INDICES.x
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; Weight matrix
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mul VSTMP_REG_MAT0, VSIN_REG_WEIGHTS.x, c[0 + a0.x VSCONST_REG_MATRIX_OFFSET]
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mul VSTMP_REG_MAT1, VSIN_REG_WEIGHTS.x, c[1 + a0.x VSCONST_REG_MATRIX_OFFSET]
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mul VSTMP_REG_MAT2, VSIN_REG_WEIGHTS.x, c[2 + a0.x VSCONST_REG_MATRIX_OFFSET]
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;------------------------------------------------------------------------------
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; Get matrix index 2
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mov a0.x, VSIN_REG_INDICES.y
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; Weight matrix
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mad VSTMP_REG_MAT0, VSIN_REG_WEIGHTS.y, c[0 + a0.x VSCONST_REG_MATRIX_OFFSET], VSTMP_REG_MAT0
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mad VSTMP_REG_MAT1, VSIN_REG_WEIGHTS.y, c[1 + a0.x VSCONST_REG_MATRIX_OFFSET], VSTMP_REG_MAT1
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mad VSTMP_REG_MAT2, VSIN_REG_WEIGHTS.y, c[2 + a0.x VSCONST_REG_MATRIX_OFFSET], VSTMP_REG_MAT2
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;------------------------------------------------------------------------------
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; Transform position by weighted matrix
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dp4 VSTMP_REG_POS_ACCUM.x, VSIN_REG_POS, VSTMP_REG_MAT0
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dp4 VSTMP_REG_POS_ACCUM.y, VSIN_REG_POS, VSTMP_REG_MAT1
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dp4 VSTMP_REG_POS_ACCUM.z, VSIN_REG_POS, VSTMP_REG_MAT2
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; Copy w
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mov VSTMP_REG_POS_ACCUM.w, VSIN_REG_POS.w
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;------------------------------------------------------------------------------
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; Combined camera & projection matrix
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;------------------------------------------------------------------------------
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dph oPos.x, VSTMP_REG_POS_ACCUM, VSCONST_REG_TRANSFORM_X
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dph oPos.y, VSTMP_REG_POS_ACCUM, VSCONST_REG_TRANSFORM_Y
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dph oPos.z, VSTMP_REG_POS_ACCUM, VSCONST_REG_TRANSFORM_Z
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dph oPos.w, VSTMP_REG_POS_ACCUM, VSCONST_REG_TRANSFORM_W
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;------------------------------------------------------------------------------
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; Calculate second set of texture coordinates (into 4th slot) by transforming the world space
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; position into the shadowbuffer space
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;------------------------------------------------------------------------------
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dp4 oT3.x, VSTMP_REG_POS_ACCUM, VSCONST_REG_SHADOWBUFFER_TRANSFORM_X
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dp4 oT3.y, VSTMP_REG_POS_ACCUM, VSCONST_REG_SHADOWBUFFER_TRANSFORM_Y
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dp4 oT3.z, VSTMP_REG_POS_ACCUM, VSCONST_REG_SHADOWBUFFER_TRANSFORM_Z
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dp4 r0.w, VSTMP_REG_POS_ACCUM, VSCONST_REG_SHADOWBUFFER_TRANSFORM_W
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;clamp w (q) to 0
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slt r1, c0, c0
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max r0.w, r0.w, r1.w
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mov oT3.w, r0.w
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;------------------------------------------------------------------------------
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; oPos to screenspace transformation
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;------------------------------------------------------------------------------
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mul oPos.xyz, r12, c94 ; scale
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+ rcc r1.x, r12.w ; compute 1/w
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mad oPos.xyz, r12, r1.x, c95 ; scale by 1/w, add offset
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