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[PATCH] qbsp: Make NormalizePlane tell us when the plane is flipped 

Signed-off-by: Tyrann <tyrann@disenchant.net>
This commit is contained in:
Tyrann 2007-08-20 21:21:17 +09:30
parent de9f49f954
commit 984d696b46
1 changed files with 30 additions and 33 deletions
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63
qbsp/brush.c
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@ -121,49 +121,46 @@ AddToBounds(vec3_t v)
//===========================================================================
static void
NormalizePlane(plane_t *dp)
static int
NormalizePlane(plane_t *p)
{
int i;
vec_t ax, ay, az;
if (dp->normal[0] == -1.0) {
dp->normal[0] = 1.0;
dp->dist = -dp->dist;
} else if (dp->normal[1] == -1.0) {
dp->normal[1] = 1.0;
dp->dist = -dp->dist;
} else if (dp->normal[2] == -1.0) {
dp->normal[2] = 1.0;
dp->dist = -dp->dist;
for (i = 0; i < 3; i++) {
if (p->normal[i] == 1.0) {
p->normal[(i + 1) % 3] = 0;
p->normal[(i + 2) % 3] = 0;
p->type = PLANE_X + i;
return 0; /* no flip */
}
if (p->normal[i] == -1.0) {
p->normal[i] = 1.0;
p->normal[(i + 1) % 3] = 0;
p->normal[(i + 2) % 3] = 0;
p->dist = -p->dist;
p->type = PLANE_X + i;
return 1; /* plane flipped */
}
}
if (dp->normal[0] == 1.0) {
dp->type = PLANE_X;
return;
}
if (dp->normal[1] == 1.0) {
dp->type = PLANE_Y;
return;
}
if (dp->normal[2] == 1.0) {
dp->type = PLANE_Z;
return;
}
ax = fabs(dp->normal[0]);
ay = fabs(dp->normal[1]);
az = fabs(dp->normal[2]);
ax = fabs(p->normal[0]);
ay = fabs(p->normal[1]);
az = fabs(p->normal[2]);
if (ax >= ay && ax >= az)
dp->type = PLANE_ANYX;
p->type = PLANE_ANYX;
else if (ay >= ax && ay >= az)
dp->type = PLANE_ANYY;
p->type = PLANE_ANYY;
else
dp->type = PLANE_ANYZ;
if (dp->normal[dp->type - PLANE_ANYX] < 0) {
VectorSubtract(vec3_origin, dp->normal, dp->normal);
dp->dist = -dp->dist;
p->type = PLANE_ANYZ;
if (p->normal[p->type - PLANE_ANYX] < 0) {
VectorSubtract(vec3_origin, p->normal, p->normal);
p->dist = -p->dist;
return 1; /* plane flipped */
}
return 0; /* no flip */
}
/*