mirror of
https://github.com/thug1src/thug.git
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54 lines
2.2 KiB
V Shell
54 lines
2.2 KiB
V Shell
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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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; Transform position
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dp4 VSTMP_REG_POS_TMP.x, VSIN_REG_POS, c[0 + a0.x VSCONST_REG_MATRIX_OFFSET]
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dp4 VSTMP_REG_POS_TMP.y, VSIN_REG_POS, c[1 + a0.x VSCONST_REG_MATRIX_OFFSET]
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dp4 VSTMP_REG_POS_TMP.z, VSIN_REG_POS, c[2 + a0.x VSCONST_REG_MATRIX_OFFSET]
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mov VSTMP_REG_POS_TMP.w, VSIN_REG_POS.w
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; No need to scale by results by vertex weights, since this is a one-weight shader so the weight
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; is assumed to be 1.0
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;------------------------------------------------------------------------------
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; Combined camera & projection matrix
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;------------------------------------------------------------------------------
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dp4 oPos.x, VSTMP_REG_POS_TMP, VSCONST_REG_TRANSFORM_X
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dp4 oPos.y, VSTMP_REG_POS_TMP, VSCONST_REG_TRANSFORM_Y
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dp4 oPos.z, VSTMP_REG_POS_TMP, VSCONST_REG_TRANSFORM_Z
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dp4 oPos.w, VSTMP_REG_POS_TMP, 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_TMP, VSCONST_REG_SHADOWBUFFER_TRANSFORM_X
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dp4 oT3.y, VSTMP_REG_POS_TMP, VSCONST_REG_SHADOWBUFFER_TRANSFORM_Y
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dp4 oT3.z, VSTMP_REG_POS_TMP, VSCONST_REG_SHADOWBUFFER_TRANSFORM_Z
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dp4 r0.w, VSTMP_REG_POS_TMP, 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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