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Patch from Nuke.YKT to work around a Polymost glitch with slopes

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git-svn-id: https://svn.eduke32.com/eduke32@7401 1a8010ca-5511-0410-912e-c29ae57300e0
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terminx 2019-03-19 17:07:57 +00:00
parent f1ea04e7da
commit c8b161704b
1 changed files with 8 additions and 1 deletions
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9
source/build/src/polymost.cpp
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@ -4590,7 +4590,14 @@ static void polymost_internal_nonparallaxed(vec2f_t n0, vec2f_t n1, float ryp0,
if (globalorientation&2) //slopes
{
//Pick some point guaranteed to be not collinear to the 1st two points
vec2f_t const oxy = { n0.x + (n1.y - n0.y), n0.y + (n0.x - n1.x) };
vec2f_t dxy = { n1.y - n0.y, n0.x - n1.x };
float const dxyr = polymost_invsqrt_approximation(dxy.x * dxy.x + dxy.y * dxy.y);
dxy.x *= dxyr * 4096.f;
dxy.y *= dxyr * 4096.f;
vec2f_t const oxy = { n0.x + dxy.x, n0.y + dxy.y };
float const ox2 = (oxy.y - fglobalposy) * gcosang - (oxy.x - fglobalposx) * gsinang;
float oy2 = 1.f / ((oxy.x - fglobalposx) * gcosang2 + (oxy.y - fglobalposy) * gsinang2);