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Use 64-bit math for calculating the texture origin X/Z

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This commit is contained in:
Jaime Ita Passos 2021-04-29 19:24:37 -03:00
parent 9d41325843
commit b4a09405a7
1 changed files with 7 additions and 4 deletions
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11
src/r_plane.c
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@ -707,15 +707,18 @@ static void R_SetSlopePlaneOrigin(pslope_t *slope, fixed_t xpos, fixed_t ypos, f
{
floatv3_t *p = &ds_slope_origin;
float vx = FixedToFloat(xpos + xoff);
float vy = FixedToFloat(ypos - yoff);
INT64 vx = (INT64)xpos + (INT64)xoff;
INT64 vy = (INT64)ypos - (INT64)yoff;
float vxf = vx / (float)FRACUNIT;
float vyf = vy / (float)FRACUNIT;
float ang = ANG2RAD(ANGLE_270 - angle);
// p is the texture origin in view space
// Don't add in the offsets at this stage, because doing so can result in
// errors if the flat is rotated.
p->x = vx * cos(ang) - vy * sin(ang);
p->z = vx * sin(ang) + vy * cos(ang);
p->x = vxf * cos(ang) - vyf * sin(ang);
p->z = vxf * sin(ang) + vyf * cos(ang);
p->y = (R_GetSlopeZAt(slope, -xoff, yoff) - zpos) / (float)FRACUNIT;
}