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26 lines
736 B
PHP
Executable File
26 lines
736 B
PHP
Executable File
// ======================================================================
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// inputs:
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//
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// none
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//
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// outputs:
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//
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// r9.xyz = vertex in world space
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// r11.xyz = unit vector from vertex to camera
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// r11.w = distance squared from vertex to camera
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//
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// ======================================================================
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// ----------------------------------------------------------------------
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// transform vertex position into world space
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m4x3 r9.xyz, vPosition, cObjectWorldMatrix
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// ----------------------------------------------------------------------
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// calculate the direction to the viewer
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sub r11.xyz, cCameraPosition, r9
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dp3 r11.w, r11, r11
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rsq r0.w, r11.w
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mul r11.xyz, r11, r0.w
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