/
SetBrush.m
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SetBrush.m
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#import "qedefs.h"
@implementation SetBrush
/*
==================
textureAxisFromPlane
==================
*/
#if 1
vec3_t baseaxis[18] =
{
{0,0,1}, {1,0,0}, {0,-1,0}, // floor
{0,0,-1}, {1,0,0}, {0,-1,0}, // ceiling
{1,0,0}, {0,1,0}, {0,0,-1}, // west wall
{-1,0,0}, {0,1,0}, {0,0,-1}, // east wall
{0,1,0}, {1,0,0}, {0,0,-1}, // south wall
{0,-1,0}, {1,0,0}, {0,0,-1} // north wall
};
#else
vec3_t baseaxis[18] =
{
{0,0,1}, {1,0,0}, {0,-1,0}, // floor
{0,0,-1}, {1,0,0}, {0,1,0}, // ceiling
{1,0,0}, {0,1,0}, {0,0,-1}, // west wall
{-1,0,0}, {0,-1,0}, {0,0,-1}, // east wall
{0,1,0}, {-1,0,0}, {0,0,-1}, // south wall
{0,-1,0}, {1,0,0}, {0,0,-1} // north wall
};
#endif
float TextureAxisFromPlane(plane_t *pln, float *xv, float *yv)
{
int bestaxis;
float dot,best;
int i;
best = 0;
bestaxis = 0;
for (i=0 ; i<6 ; i++)
{
dot = DotProduct (pln->normal, baseaxis[i*3]);
if (dot > best)
{
best = dot;
bestaxis = i;
}
}
VectorCopy (baseaxis[bestaxis*3+1], xv);
VectorCopy (baseaxis[bestaxis*3+2], yv);
return lightaxis[bestaxis>>1];
}
#define BOGUS_RANGE 18000
/*
=================
CheckFace
Note: this will not catch 0 area polygons
=================
*/
void CheckFace (face_t *f)
{
int i, j;
float *p1, *p2;
float d, edgedist;
vec3_t dir, edgenormal;
winding_t *w;
w = f->w;
if (!w)
Error ("CheckFace: no winding");
if (w->numpoints < 3)
Error ("CheckFace: %i points",w->numpoints);
for (i=0 ; i<w->numpoints ; i++)
{
p1 = w->points[i];
for (j=0 ; j<3 ; j++)
if (p1[j] > BOGUS_RANGE || p1[j] < -BOGUS_RANGE)
Error ("CheckFace: BUGUS_RANGE: %f",p1[j]);
j = i+1 == w->numpoints ? 0 : i+1;
// check the point is on the face plane
d = DotProduct (p1, f->plane.normal) - f->plane.dist;
if (d < -ON_EPSILON || d > ON_EPSILON)
Error ("CheckFace: point off plane");
// check the edge isn't degenerate
p2 = w->points[j];
VectorSubtract (p2, p1, dir);
if (VectorLength (dir) < ON_EPSILON)
Error ("CheckFace: degenerate edge");
CrossProduct (f->plane.normal, dir, edgenormal);
VectorNormalize (edgenormal);
edgedist = DotProduct (p1, edgenormal);
edgedist += ON_EPSILON;
// all other points must be on front side
for (j=0 ; j<w->numpoints ; j++)
{
if (j == i)
continue;
d = DotProduct (w->points[j], edgenormal);
if (d > edgedist)
Error ("CheckFace: non-convex");
}
}
}
/*
=============================================================================
TURN PLANES INTO GROUPS OF FACES
=============================================================================
*/
/*
==================
NewWinding
==================
*/
winding_t *NewWinding (int points)
{
winding_t *w;
int size;
if (points > MAX_POINTS_ON_WINDING)
Error ("NewWinding: %i points", points);
size = (int)((winding_t *)0)->points[points];
w = malloc (size);
memset (w, 0, size);
return w;
}
/*
==================
CopyWinding
==================
*/
winding_t *CopyWinding (winding_t *w)
{
int size;
winding_t *c;
size = (int)((winding_t *)0)->points[w->numpoints];
c = malloc (size);
memcpy (c, w, size);
return c;
}
/*
==================
ClipWinding
Clips the winding to the plane, returning the new winding on the positive side
Frees the input winding.
==================
*/
winding_t *ClipWinding (winding_t *in, plane_t *split)
{
float dists[MAX_POINTS_ON_WINDING];
int sides[MAX_POINTS_ON_WINDING];
int counts[3];
float dot;
int i, j;
float *p1, *p2, *mid;
winding_t *neww;
int maxpts;
counts[0] = counts[1] = counts[2] = 0;
// determine sides for each point
for (i=0 ; i<in->numpoints ; i++)
{
dot = DotProduct (in->points[i], split->normal);
dot -= split->dist;
dists[i] = dot;
if (dot > ON_EPSILON)
sides[i] = SIDE_FRONT;
else if (dot < -ON_EPSILON)
sides[i] = SIDE_BACK;
else
{
sides[i] = SIDE_ON;
}
counts[sides[i]]++;
}
sides[i] = sides[0];
dists[i] = dists[0];
if (!counts[0] && !counts[1])
return in;
if (!counts[0])
{
free (in);
return NULL;
}
if (!counts[1])
return in;
maxpts = in->numpoints+4; // can't use counts[0]+2 because
// of fp grouping errors
neww = NewWinding (maxpts);
for (i=0 ; i<in->numpoints ; i++)
{
p1 = in->points[i];
mid = neww->points[neww->numpoints];
if (sides[i] == SIDE_FRONT || sides[i] == SIDE_ON)
{
VectorCopy (p1, mid);
mid[3] = p1[3];
mid[4] = p1[4];
neww->numpoints++;
if (sides[i] == SIDE_ON)
continue;
mid = neww->points[neww->numpoints];
}
if (sides[i+1] == SIDE_ON || sides[i+1] == sides[i])
continue;
// generate a split point
if (i == in->numpoints - 1)
p2 = in->points[0];
else
p2 = p1 + 5;
neww->numpoints++;
dot = dists[i] / (dists[i]-dists[i+1]);
for (j=0 ; j<3 ; j++)
{ // avoid round off error when possible
if (split->normal[j] == 1)
mid[j] = split->dist;
else if (split->normal[j] == -1)
mid[j] = -split->dist;
mid[j] = p1[j] + dot*(p2[j]-p1[j]);
}
mid[3] = p1[3] + dot*(p2[3]-p1[3]);
mid[4] = p1[4] + dot*(p2[4]-p1[4]);
}
if (neww->numpoints > maxpts)
Error ("ClipWinding: points exceeded estimate");
// free the original winding
free (in);
return neww;
}
/*
=================
BasePolyForPlane
There has GOT to be a better way of doing this...
=================
*/
winding_t *BasePolyForPlane (face_t *f)
{
int i, x;
float max, v;
vec3_t org, vright, vup;
vec3_t xaxis, yaxis;
winding_t *w;
texturedef_t *td;
plane_t *p;
float ang, sinv, cosv;
float s, t, ns, nt;
p = &f->plane;
// 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");
VectorCopy (vec3_origin, vup);
switch (x)
{
case 0:
case 1:
vup[2] = 1;
break;
case 2:
vup[0] = 1;
break;
}
v = DotProduct (vup, p->normal);
VectorMA (vup, -v, p->normal, vup);
VectorNormalize (vup);
VectorScale (p->normal, p->dist, org);
CrossProduct (vup, p->normal, vright);
VectorScale (vup, 8192, vup);
VectorScale (vright, 8192, vright);
// project a really big axis aligned box onto the plane
w = NewWinding (4);
w->numpoints = 4;
VectorSubtract (org, vright, w->points[0]);
VectorAdd (w->points[0], vup, w->points[0]);
VectorAdd (org, vright, w->points[1]);
VectorAdd (w->points[1], vup, w->points[1]);
VectorAdd (org, vright, w->points[2]);
VectorSubtract (w->points[2], vup, w->points[2]);
VectorSubtract (org, vright, w->points[3]);
VectorSubtract (w->points[3], vup, w->points[3]);
// set texture values
f->light = TextureAxisFromPlane(&f->plane, xaxis, yaxis);
td = &f->texture;
// rotate axis
ang = td->rotate / 180 * M_PI;
sinv = sin(ang);
cosv = cos(ang);
if (!td->scale[0])
td->scale[0] = 1;
if (!td->scale[1])
td->scale[1] = 1;
for (i=0 ; i<4 ; i++)
{
s = DotProduct (w->points[i], xaxis);
t = DotProduct (w->points[i], yaxis);
ns = cosv * s - sinv * t;
nt = sinv * s + cosv * t;
w->points[i][3] = ns/td->scale[0] + td->shift[0];
w->points[i][4] = nt/td->scale[1] + td->shift[1];
}
return w;
}
/*
===========
calcWindings
recalc the faces and mins / maxs from the planes
If a face has a NULL winding, it is an overconstraining plane and
can be removed.
===========
*/
- calcWindings
{
int i,j, k;
float v;
face_t *f;
winding_t *w;
plane_t plane;
vec3_t t1, t2, t3;
BOOL useplane[MAX_FACES];
bmins[0] = bmins[1] = bmins[2] = 99999;
bmaxs[0] = bmaxs[1] = bmaxs[2] = -99999;
invalid = NO;
[self freeWindings];
for (i=0 ; i<MAX_FACES ; i++)
{
f = &faces[i];
// calc a plane from the points
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];
}
CrossProduct(t1,t2, f->plane.normal);
if (VectorCompare (f->plane.normal, vec3_origin))
{
useplane[i] = NO;
break;
}
VectorNormalize (f->plane.normal);
f->plane.dist = DotProduct (t3, f->plane.normal);
// if the plane duplicates another plane, ignore it
// (assume it is a brush being edited that will be fixed)
useplane[i] = YES;
for (j=0 ; j< i ; j++)
{
if ( f->plane.normal[0] == faces[j].plane.normal[0]
&& f->plane.normal[1] == faces[j].plane.normal[1]
&& f->plane.normal[2] == faces[j].plane.normal[2]
&& f->plane.dist == faces[j].plane.dist )
{
useplane[i] = NO;
break;
}
}
}
for (i=0 ; i<numfaces ; i++)
{
if (!useplane[i])
continue; // duplicate plane
f = &faces[i];
w = BasePolyForPlane (f);
for (j=0 ; j<numfaces && w ; j++)
{
if (j == i)
continue;
// flip the plane, because we want to keep the back side
VectorSubtract (vec3_origin, faces[j].plane.normal, plane.normal);
plane.dist = -faces[j].plane.dist;
w = ClipWinding (w, &plane);
}
f->w = w;
if (w)
{
CheckFace (f);
for (j=0 ; j<w->numpoints ; j++)
{
for (k=0 ; k<3 ; k++)
{
v = w->points[j][k];
if (fabs(v - rint(v)) < FP_EPSILON)
v = w->points[j][k] = rint(v);
if (v < bmins[k])
bmins[k] = v;
if (v > bmaxs[k])
bmaxs[k] = v;
}
}
}
}
if (bmins[0] == 99999)
{
invalid = YES;
VectorCopy (vec3_origin, bmins);
VectorCopy (vec3_origin, bmaxs);
return nil;
}
return self;
}
//============================================================================
/*
===========
initOwner:::
===========
*/
- initOwner: own mins:(float *)mins maxs:(float *)maxs texture:(texturedef_t *)tex
{
[super init];
parent = own;
[self setTexturedef: tex];
[self setMins: mins maxs: maxs];
return self;
}
- setMins:(float *)mins maxs:(float *)maxs
{
int i, j;
vec3_t pts[4][2];
for (i=0 ; i<3 ; i++)
{
if (maxs[i] - mins[i] <= 0)
{
VectorCopy (mins, bmins);
VectorCopy (maxs, bmaxs);
invalid = YES;
numfaces = 0;
return self;
}
}
pts[0][0][0] = mins[0];
pts[0][0][1] = mins[1];
pts[1][0][0] = mins[0];
pts[1][0][1] = maxs[1];
pts[2][0][0] = maxs[0];
pts[2][0][1] = maxs[1];
pts[3][0][0] = maxs[0];
pts[3][0][1] = mins[1];
for (i=0 ; i<4 ; i++)
{
pts[i][0][2] = mins[2];
pts[i][1][0] = pts[i][0][0];
pts[i][1][1] = pts[i][0][1];
pts[i][1][2] = maxs[2];
}
numfaces = 6;
for (i=0 ; i<4 ; i++)
{
j = (i+1)%4;
faces[i].planepts[0][0] = pts[j][1][0];
faces[i].planepts[0][1] = pts[j][1][1];
faces[i].planepts[0][2] = pts[j][1][2];
faces[i].planepts[1][0] = pts[i][1][0];
faces[i].planepts[1][1] = pts[i][1][1];
faces[i].planepts[1][2] = pts[i][1][2];
faces[i].planepts[2][0] = pts[i][0][0];
faces[i].planepts[2][1] = pts[i][0][1];
faces[i].planepts[2][2] = pts[i][0][2];
}
faces[4].planepts[0][0] = pts[0][1][0];
faces[4].planepts[0][1] = pts[0][1][1];
faces[4].planepts[0][2] = pts[0][1][2];
faces[4].planepts[1][0] = pts[1][1][0];
faces[4].planepts[1][1] = pts[1][1][1];
faces[4].planepts[1][2] = pts[1][1][2];
faces[4].planepts[2][0] = pts[2][1][0];
faces[4].planepts[2][1] = pts[2][1][1];
faces[4].planepts[2][2] = pts[2][1][2];
faces[5].planepts[0][0] = pts[2][0][0];
faces[5].planepts[0][1] = pts[2][0][1];
faces[5].planepts[0][2] = pts[2][0][2];
faces[5].planepts[1][0] = pts[1][0][0];
faces[5].planepts[1][1] = pts[1][0][1];
faces[5].planepts[1][2] = pts[1][0][2];
faces[5].planepts[2][0] = pts[0][0][0];
faces[5].planepts[2][1] = pts[0][0][1];
faces[5].planepts[2][2] = pts[0][0][2];
[self calcWindings];
return self;
}
- parent
{
return parent;
}
- setParent: (id)p
{
parent = p;
return self;
}
- setEntityColor: (vec3_t)color
{
VectorCopy (color, entitycolor);
return self;
}
- freeWindings
{
int i;
for (i=0 ; i<MAX_FACES ; i++)
if (faces[i].w)
{
free (faces[i].w);
faces[i].w = NULL;
}
return self;
}
- copyFromZone:(NXZone *)zone
{
id new;
[self freeWindings];
new = [super copyFromZone: zone];
[self calcWindings];
[new calcWindings];
return new;
}
- free
{
[self freeWindings];
return [super free];
}
/*
===========
initOwner: fromTokens
===========
*/
int numsb;
- initFromTokens: own
{
face_t *f;
int i,j;
[self init];
parent = own;
f = faces;
numfaces = 0;
do
{
if (!GetToken (true))
break;
if (!strcmp (token, "}") )
break;
for (i=0 ; i<3 ; i++)
{
if (i != 0)
GetToken (true);
if (strcmp (token, "(") )
Error ("parsing map file");
for (j=0 ; j<3 ; j++)
{
GetToken (false);
f->planepts[i][j] = atoi(token);
}
GetToken (false);
if (strcmp (token, ")") )
Error ("parsing map file");
}
GetToken (false);
strcpy (f->texture.texture, token);
GetToken (false);
f->texture.shift[0] = atof(token);
GetToken (false);
f->texture.shift[1] = atof(token);
GetToken (false);
f->texture.rotate = atof(token);
GetToken (false);
f->texture.scale[0] = atof(token);
GetToken (false);
f->texture.scale[1] = atof(token);
#if 0
flags = atoi(token);
flags &= 7;
f->texture.rotate = 0;
f->texture.scale[0] = 1;
f->texture.scale[1] = 1;
#define TEX_FLIPAXIS 1
#define TEX_FLIPS 2
#define TEX_FLIPT 4
if (flags & TEX_FLIPAXIS)
{
f->texture.rotate = 90;
if ( !(flags & TEX_FLIPT) )
f->texture.scale[0] = -1;
if (flags & TEX_FLIPS)
f->texture.scale[1] = -1;
}
else
{
if (flags & TEX_FLIPS)
f->texture.scale[0] = -1;
if (flags & TEX_FLIPT)
f->texture.scale[1] = -1;
}
#endif
f++;
numfaces++;
} while (1);
numsb++;
[self calcWindings];
return self;
}
/*
===========
writeToFILE
===========
*/
- writeToFILE: (FILE *)f region: (BOOL)reg
{
int i,j;
face_t *fa;
texturedef_t *td;
if (reg && regioned)
return self;
fprintf (f, "{\n");
for (i=0 ; i<numfaces ; i++)
{
fa = &faces[i];
for (j=0 ; j<3 ; j++)
fprintf (f,"( %d %d %d ) ", (int)fa->planepts[j][0], (int)fa->planepts[j][1], (int)fa->planepts[j][2]);
td = &fa->texture;
fprintf (f,"%s %d %d %d %f %f\n", td->texture, (int)td->shift[0], (int)td->shift[1], (int)td->rotate, td->scale[0], td->scale[1]);
}
fprintf (f, "}\n");
return self;
}
/*
==============================================================================
INTERACTION
==============================================================================
*/
- getMins: (vec3_t)mins maxs: (vec3_t)maxs
{
VectorCopy (bmins, mins);
VectorCopy (bmaxs, maxs);
return self;
}
- (BOOL)selected
{
return selected;
}
- setSelected: (BOOL)s
{
selected = s;
return self;
}
- (BOOL)regioned
{
return regioned;
}
- setRegioned: (BOOL)s
{
regioned = s;
return self;
}
/*
===========
setTexturedef
===========
*/
- setTexturedef: (texturedef_t *)tex
{
int i;
for (i=0 ; i<MAX_FACES ; i++)
{
faces[i].texture = *tex;
faces[i].qtexture = NULL; // recache next render
}
[self calcWindings]; // in case texture coords changed
return self;
}
- setTexturedef: (texturedef_t *)tex forFace:(int)f
{
if ( (unsigned)f > numfaces)
Error ("setTexturedef:forFace: bad face number %i",f);
faces[f].texture = *tex;
faces[f].qtexture = NULL; // recache next render
[self calcWindings]; // in case texture coords changed
return self;
}
/*
===========
texturedef
===========
*/
- (texturedef_t *)texturedef
{
return &faces[0].texture;
}
- (texturedef_t *)texturedefForFace: (int)f
{
return &faces[f].texture;
}
/*
===========
removeIfInvalid
So created veneers don't stay around
===========
*/
- removeIfInvalid
{
int i, j;
for (i=0 ; i<numfaces ; i++)
{
if (faces[i].w)
continue;
for (j=i+1 ; j<numfaces ; j++)
faces[j-1] = faces[j];
i--;
numfaces--;
}
for ( ; i<MAX_FACES ; i++)
faces[i].w = NULL;
if (numfaces<4)
{
invalid = YES;
[self remove];
return nil;
}
return self;
}
/*
===========
containsPoint
===========
*/
- (BOOL)containsPoint: (vec3_t)pt
{
int i;
for (i=0 ; i<numfaces ; i++)
if (DotProduct (faces[i].plane.normal, pt) >= faces[i].plane.dist)
return NO;
return YES;
}
/*
===========
clipRay
===========
*/
- clipRay: (vec3_t)p1 : (vec3_t) p2
:(vec3_t)frontpoint : (int *)f_face
:(vec3_t)backpoint : (int *)b_face
{
int frontface, backface;
int i, j;
face_t *f;
float d1, d2, m;
float *start;
start = p1;
frontface = -2;
backface = -2;
f = faces;
for (i=0 ; i<numfaces ; i++, f++)
{
if (!f->w)
continue; // clipped off plane
d1 = DotProduct (p1, f->plane.normal) - f->plane.dist;
d2 = DotProduct (p2, f->plane.normal) - f->plane.dist;
if (d1 >= 0 && d2 >= 0)
{ // the entire ray is in front of the polytope
*f_face = -1;
*b_face = -1;
return self;
}
if (d1 > 0 && d2 < 0)
{ // new front plane
frontface = i;
m = d1 / (d1-d2);
for (j=0 ; j<3 ; j++)
frontpoint[j] = p1[j] + m*(p2[j]-p1[j]);
p1 = frontpoint;
}
if (d1 < 0 && d2 > 0)
{ // new back plane
backface = i;
m = d1 / (d1-d2);
for (j=0 ; j<3 ; j++)
backpoint[j] = p1[j] + m*(p2[j]-p1[j]);
p2 = backpoint;
}
}
*f_face = frontface;
*b_face = backface;
return self;
}
/*
===========
hitByRay
===========
*/
- hitByRay: (vec3_t)p1 : (vec3_t) p2 : (float *)time : (int *)face
{
vec3_t frontpoint, backpoint, dir;
int frontface, backface;
if (regioned)
{
*time = -1;
*face = -1;
return self;
}
[self clipRay: p1 : p2 : frontpoint: &frontface : backpoint : &backface];
if (frontface == -2 && backface == -2)
{ // entire ray is inside the brush, select first face
*time = 0;
*face = 0;
return self;
}
if (frontface < 0)
{ // ray started inside the polytope, don't select it
*time = -1;
*face = -1;
return self;
}
VectorSubtract (p2, p1, dir);
VectorNormalize (dir);
VectorSubtract (frontpoint, p1, frontpoint);
*time = DotProduct (frontpoint, dir);