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rsx: Handle rare rounding issue where position.w is very close to zero

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kd-11 2021-04-13 21:00:33 +03:00 • committed by kd-11
parent f5415fb4ac
commit 14a64e2529
1 changed files with 2 additions and 2 deletions
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4
rpcs3/Emu/RSX/Common/GLSLCommon.cpp
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@ -616,7 +616,7 @@ namespace glsl
// Forward mapping eqn is d' = d * (f - n) + n, where d' is the stored Z value (this) and d is the normalized API value. // Forward mapping eqn is d' = d * (f - n) + n, where d' is the stored Z value (this) and d is the normalized API value.
"vec4 apply_zclip_xform(const in vec4 pos, const in float near_plane, const in float far_plane)\n" "vec4 apply_zclip_xform(const in vec4 pos, const in float near_plane, const in float far_plane)\n"
"{\n" "{\n"
" if (far_plane != 0.0)\n" " if (far_plane != 0.0 && pos.w != 0.0)\n"
" {\n" " {\n"
" double z_range = (far_plane > near_plane)? (far_plane - near_plane) : far_plane;\n" " double z_range = (far_plane > near_plane)? (far_plane - near_plane) : far_plane;\n"
" double inv_range = rcp_precise(z_range);\n" " double inv_range = rcp_precise(z_range);\n"
@ -646,7 +646,7 @@ namespace glsl
" // Compress Z and store towards highest end of the range\n" " // Compress Z and store towards highest end of the range\n"
" d = min(1., 0.99 + (0.01 * (pos.z - near_plane) / (far_plane - near_plane)));\n" " d = min(1., 0.99 + (0.01 * (pos.z - near_plane) / (far_plane - near_plane)));\n"
" }\n" " }\n"
" else\n" " else\n" // This catch-call also handles w=0 since d=inf
" {\n" " {\n"
" return pos;\n" " return pos;\n"
" }\n" " }\n"