void Brush_MakeFacePlanes (brush_t *b)
{
face_t *f;
int j;
vec3_t t1, t2, t3;
for (f=b->brush_faces ; f ; f=f->next)
{
// convert to a vector / dist plane
for (j=0 ; j<3 ; j++)
{
t1[j] = f->planepts[0][j] - f->planepts[1][j];
t2[j] = f->planepts[2][j] - f->planepts[1][j];
t3[j] = f->planepts[1][j];
}
Math_CrossProduct(t1,t2,f->plane.normal);
if(Math_VectorCompare(f->plane.normal,vec3_origin))
printf("WARNING: brush plane with no normal!\n");
Math_VectorNormalize(f->plane.normal);
f->plane.dist = Math_DotProduct(t3,f->plane.normal);
}
}
void Discus_Follow(ServerEntity_t *ent)
{
vec3_t vtemp;
// [23/5/2012] Quick fix for possible issue ~hogsy
if(!ent || !ent->v.enemy)
return;
vtemp[0] = ent->v.enemy->v.origin[0]-ent->v.origin[0];
vtemp[1] = ent->v.enemy->v.origin[1]-ent->v.origin[1];
vtemp[2] = ent->v.enemy->v.origin[2]+22.0f-ent->v.origin[2];
Math_VectorNormalize(vtemp);
ent->v.velocity[0] = vtemp[0]*3000.0f;
ent->v.velocity[1] = vtemp[1]*3000.0f;
ent->v.velocity[2] = vtemp[2]*3000.0f;
// [25/6/2012] Simplified ~hogsy
Math_MVToVector(Math_VectorToAngles(ent->v.velocity),ent->v.angles);
ent->v.think = Discus_Follow;
ent->v.dNextThink = Server.dTime+0.01;
}
winding_t *BasePolyForPlane (plane_t *p)
{
int i, x;
vec_t max, v;
vec3_t org, vright, vup;
winding_t *w;
// find the major axis
max = -BOGUS_RANGE;
x = -1;
for (i=0 ; i<3; i++)
{
v = fabs(p->normal[i]);
if (v > max)
{
x = i;
max = v;
}
}
if (x==-1)
Error("BasePolyForPlane: no axis found");
Math_VectorCopy(vec3_origin,vup);
switch (x)
{
case 0:
case 1:
vup[2] = 1;
break;
case 2:
vup[0] = 1;
break;
}
v = Math_DotProduct(vup,p->normal);
Math_VectorMA(vup,-v,p->normal,vup);
Math_VectorNormalize(vup);
Math_VectorScale(p->normal,p->dist,org);
Math_CrossProduct(vup,p->normal,vright);
Math_VectorScale(vup,8192,vup);
Math_VectorScale(vright,8192,vright);
// project a really big axis aligned box onto the plane
w = NewWinding (4);
Math_VectorSubtract(org,vright,w->points[0]);
Math_VectorAdd(w->points[0],vup,w->points[0]);
Math_VectorAdd(org,vright,w->points[1]);
Math_VectorAdd(w->points[1],vup,w->points[1]);
Math_VectorAdd(org,vright,w->points[2]);
Math_VectorSubtract(w->points[2],vup,w->points[2]);
Math_VectorSubtract(org,vright,w->points[3]);
Math_VectorSubtract(w->points[3],vup,w->points[3]);
w->numpoints = 4;
return w;
}
