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Polymost relative texture alignment patch from Nuke

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This "fixes" relative texture alignment for floors and ceilings in Polymost to match classic mode. "Fix" is in quotes because this actually means the alignment is less correct in terms of proper scaling than before, but more correct in terms of accuracy to classic mode.

git-svn-id: https://svn.eduke32.com/eduke32@7411 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2019-03-19 17:08:35 +00:00
parent b819b298ee
commit 1a0ee0f4c3
1 changed files with 14 additions and 6 deletions
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20
source/build/src/polymost.cpp
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@ -4514,13 +4514,21 @@ static void polymost_internal_nonparallaxed(vec2f_t n0, vec2f_t n1, float ryp0,
if (globalorientation & 64)
{
//relative alignment
vec2f_t fxy = { (float)(wall[wall[sec->wallptr].point2].x - wall[sec->wallptr].x),
(float)(wall[wall[sec->wallptr].point2].y - wall[sec->wallptr].y) };
vec2_t const xy = { wall[wall[sec->wallptr].point2].x - wall[sec->wallptr].x,
wall[wall[sec->wallptr].point2].y - wall[sec->wallptr].y };
float r;
if (globalorientation & 2)
{
int i = krecipasm(nsqrtasm(uhypsq(xy.x,xy.y)));
r = i * (1.f/1073741824.f);
}
else
{
int i = nsqrtasm(uhypsq(xy.x,xy.y)); if (i == 0) i = 1024; else i = tabledivide32(1048576, i);
r = i * (1.f/1048576.f);
}
float r = polymost_invsqrt_approximation(fxy.x * fxy.x + fxy.y * fxy.y);
fxy.x *= r;
fxy.y *= r;
vec2f_t const fxy = { xy.x*r, xy.y*r };
ft[0] = ((float)(globalposx - wall[sec->wallptr].x)) * fxy.x + ((float)(globalposy - wall[sec->wallptr].y)) * fxy.y;
ft[1] = ((float)(globalposy - wall[sec->wallptr].y)) * fxy.x - ((float)(globalposx - wall[sec->wallptr].x)) * fxy.y;