void rt_heightfield(void * tex, vector ctr, int m, int n,
apiflt * field, apiflt wx, apiflt wy) {
int xx,yy;
vector v0, v1, v2;
apiflt xoff, yoff, zoff;
xoff=ctr.x - (wx / 2.0);
yoff=ctr.z - (wy / 2.0);
zoff=ctr.y;
for (yy=0; yy<(n-1); yy++) {
for (xx=0; xx<(m-1); xx++) {
v0.x=wx*(xx )/(m*1.0) + xoff;
v0.y=field[(yy )*m + (xx )] + zoff;
v0.z=wy*(yy )/(n*1.0) + yoff;
v1.x=wx*(xx + 1)/(m*1.0) + xoff;
v1.y=field[(yy )*m + (xx + 1)] + zoff;
v1.z=wy*(yy )/(n*1.0) + yoff;
v2.x=wx*(xx + 1)/(m*1.0) + xoff;
v2.y=field[(yy + 1)*m + (xx + 1)] + zoff;
v2.z=wy*(yy + 1)/(n*1.0) + yoff;
rt_tri(tex, v1, v0, v2);
v0.x=wx*(xx )/(m*1.0) + xoff;
v0.y=field[(yy )*m + (xx )] + zoff;
v0.z=wy*(yy )/(n*1.0) + yoff;
v1.x=wx*(xx )/(m*1.0) + xoff;
v1.y=field[(yy + 1)*m + (xx )] + zoff;
v1.z=wy*(yy + 1)/(n*1.0) + yoff;
v2.x=wx*(xx + 1)/(m*1.0) + xoff;
v2.y=field[(yy + 1)*m + (xx + 1)] + zoff;
v2.z=wy*(yy + 1)/(n*1.0) + yoff;
rt_tri(tex, v0, v1, v2);
}
}
} /* end of heightfield */
int NFFGetPolygon(FILE *dfile, SceneHandle scene) {
int numverts, i;
apivector v0, vold, vnew;
fscanf(dfile, "%d", &numverts);
NFFGetVector(dfile, &v0);
NFFGetVector(dfile, &vold);
for (i=2; i<numverts; i++) {
NFFGetVector(dfile, &vnew);
rt_tri(scene, curtexture, v0, vold, vnew);
vold = vnew;
}
return NFFNOERR;
}
static errcode GetTri(parsehandle * ph, SceneHandle scene) {
apivector v0,v1,v2;
void * tex;
errcode rc;
rc = GetString(ph, "V0");
rc |= GetVector(ph, &v0);
rc |= GetString(ph, "V1");
rc |= GetVector(ph, &v1);
rc |= GetString(ph, "V2");
rc |= GetVector(ph, &v2);
rc |= GetTexture(ph, scene, &tex);
rt_tri(scene, tex, v0, v1, v2);
return rc;
}
static errcode GetTri(FILE * dfile) {
vector v0,v1,v2;
void * tex;
errcode rc;
rc = GetString(dfile, "V0");
rc |= GetVector(dfile, &v0);
rc |= GetString(dfile, "V1");
rc |= GetVector(dfile, &v1);
rc |= GetString(dfile, "V2");
rc |= GetVector(dfile, &v2);
rc |= GetTexture(dfile, &tex);
rt_tri(tex, v0, v1, v2);
return rc;
}
static void gen_triangles(SceneHandle scene, tri_list * tlist,
apivector * vertex, apivector * normal) {
tri_list * cur;
cur = tlist;
while (cur != NULL) {
if (cur->smooth) {
rt_stri(scene, textable[cur->texnum].tex,
vertex[cur->v0], vertex[cur->v1], vertex[cur->v2],
normal[cur->v0], normal[cur->v1], normal[cur->v2]);
}
else {
rt_tri(scene, textable[cur->texnum].tex,
vertex[cur->v0], vertex[cur->v1], vertex[cur->v2]);
}
cur = cur->next;
}
}
void rt_tri_box(void * tex, vector min, vector max) {
/* -XY face */
rt_tri(tex, rt_vector(min.x, min.y, min.z),
rt_vector(min.x, max.y, min.z),
rt_vector(max.x, max.y, min.z));
rt_tri(tex, rt_vector(min.x, min.y, min.z),
rt_vector(max.x, max.y, min.z),
rt_vector(max.x, min.y, min.z));
/* +XY face */
rt_tri(tex, rt_vector(min.x, min.y, max.z),
rt_vector(max.x, max.y, max.z),
rt_vector(min.x, max.y, max.z));
rt_tri(tex, rt_vector(min.x, min.y, max.z),
rt_vector(max.x, min.y, max.z),
rt_vector(max.x, max.y, max.z));
/* -YZ face */
rt_tri(tex, rt_vector(min.x, min.y, min.z),
rt_vector(min.x, max.y, max.z),
rt_vector(min.x, min.y, max.z));
rt_tri(tex, rt_vector(min.x, min.y, min.z),
rt_vector(min.x, max.y, min.z),
rt_vector(min.x, max.y, max.z));
/* +YZ face */
rt_tri(tex, rt_vector(max.x, min.y, min.z),
rt_vector(max.x, min.y, max.z),
rt_vector(max.x, max.y, max.z));
rt_tri(tex, rt_vector(max.x, min.y, min.z),
rt_vector(max.x, max.y, max.z),
rt_vector(max.x, max.y, min.z));
/* -XZ face */
rt_tri(tex, rt_vector(min.x, min.y, min.z),
rt_vector(min.x, min.y, max.z),
rt_vector(max.x, min.y, max.z));
rt_tri(tex, rt_vector(min.x, min.y, min.z),
rt_vector(max.x, min.y, max.z),
rt_vector(max.x, min.y, min.z));
/* +XZ face */
rt_tri(tex, rt_vector(min.x, max.y, min.z),
rt_vector(max.x, max.y, max.z),
rt_vector(min.x, max.y, max.z));
rt_tri(tex, rt_vector(min.x, max.y, min.z),
rt_vector(max.x, max.y, min.z),
rt_vector(max.x, max.y, max.z));
}
static errcode GetTPolyFile(parsehandle * ph, SceneHandle scene) {
void * tex;
apivector ctr, rot, scale;
apivector v1, v2, v0;
char ifname[255];
FILE *ifp;
int v, totalpolys;
RotMat RotA;
errcode rc;
totalpolys=0;
rc = GetString(ph, "SCALE");
rc |= GetVector(ph, &scale);
rc |= GetString(ph, "ROT");
rc |= GetVector(ph, &rot);
degvectoradvec(&rot);
InitRot3d(&RotA, rot.x, rot.y, rot.z);
rc |= GetString(ph, "CENTER");
rc |= GetVector(ph, &ctr);
rc |= GetString(ph, "FILE");
fscanf(ph->ifp, "%s", ifname);
rc |= GetTexture(ph, scene, &tex);
if ((ifp=fopen(ifname, "r")) == NULL) {
printf("Can't open data file %s for input!! Aborting...\n", ifname);
return PARSEBADSUBFILE;
}
while (!feof(ifp)) {
fscanf(ifp, "%d", &v);
if (v != 3) { break; }
totalpolys++;
v=0;
rc |= GetVector(ph, &v0);
rc |= GetVector(ph, &v1);
rc |= GetVector(ph, &v2);
Scale3d(&scale, &v0);
Scale3d(&scale, &v1);
Scale3d(&scale, &v2);
Rotate3d(&RotA, &v0);
Rotate3d(&RotA, &v1);
Rotate3d(&RotA, &v2);
Trans3d(&ctr, &v0);
Trans3d(&ctr, &v1);
Trans3d(&ctr, &v2);
rt_tri(scene, tex, v1, v0, v2);
}
fclose(ifp);
return rc;
}
