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replace face related % and / with table lookups. gives almost 50% speedup in

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set_vertex (but it's not called that often) and 1/15 speedup in
R_DrawSkyBoxPoly
This commit is contained in:
Bill Currie 2001-01-04 06:24:18 +00:00
parent c3a0e96c46
commit 77970ba4d2
1 changed files with 7 additions and 7 deletions
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14
source/gl_sky_clip.c
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@ -178,10 +178,10 @@ find_intersect (int face1, vec3_t x1, int face2, vec3_t x2, vec3_t y)
int axis;
vec3_t t;
x[face1 % 3] = 1024 * (1 - 2 * (face1 / 3));
x[face2 % 3] = 1024 * (1 - 2 * (face2 / 3));
x[face_axis[face1]] = face_offset[face1];
x[face_axis[face2]] = face_offset[face2];
axis = 3 - ((face1 % 3) + (face2 % 3));
axis = 3 - ((face_axis[face1]) + (face_axis[face2]));
v[axis] = 1;
CrossProduct (x1, x2, n);
@ -206,9 +206,9 @@ find_intersect (int face1, vec3_t x1, int face2, vec3_t x2, vec3_t y)
static void
find_cube_vertex (int face1, int face2, int face3, vec3_t v)
{
v[face1 % 3] = 1024 * (1 - 2 * (face1 / 3));
v[face2 % 3] = 1024 * (1 - 2 * (face2 / 3));
v[face3 % 3] = 1024 * (1 - 2 * (face3 / 3));
v[face_axis[face1]] = face_offset[face1];
v[face_axis[face2]] = face_offset[face2];
v[face_axis[face3]] = face_offset[face3];
}
/*
@ -608,7 +608,7 @@ R_DrawSkyBoxPoly (glpoly_t *poly)
VectorSubtract (poly->verts[i], r_refdef.vieworg, v);
face = determine_face (v);
if (face != prev_face) {
if ((face % 3) == (prev_face % 3)) {
if ((face_axis[face]) == (face_axis[prev_face])) {
int x_face;
vec3_t x;