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Properly take skybox viewpoint angle into account.

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This commit is contained in:
Nev3r 2019-06-11 14:47:58 +02:00
parent ae6997621d
commit a1b2a0a344
1 changed files with 4 additions and 2 deletions
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6
src/r_portal.c
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@ -279,6 +279,7 @@ void Portal_AddSkybox (const visplane_t* plane)
if (skyboxmo[1])
{
fixed_t x = 0, y = 0;
angle_t ang = skyboxmo[0]->angle>>ANGLETOFINESHIFT;
if (mh->skybox_scalex > 0)
x = (viewx - skyboxmo[1]->x) / mh->skybox_scalex;
@ -290,8 +291,9 @@ void Portal_AddSkybox (const visplane_t* plane)
else if (mh->skybox_scaley < 0)
y = (viewy - skyboxmo[1]->y) * -mh->skybox_scaley;
portal->viewx += x;
portal->viewy += y;
// Apply transform to account for the skybox viewport angle.
portal->viewx += FixedMul(x,FINECOSINE(ang)) - FixedMul(y, FINESINE(ang));
portal->viewy += FixedMul(x, FINESINE(ang)) + FixedMul(y,FINECOSINE(ang));
}
if (mh->skybox_scalez > 0)