static Bool Init(ModeInfo * mi)
{
int i;
firestruct *fs = &fire[MI_SCREEN(mi)];
/* default settings */
fs->eject_r = 0.1 + NRAND(10) * 0.03;
fs->dt = 0.015;
fs->eject_vy = 4;
fs->eject_vl = 1;
fs->ridtri = 0.1 + NRAND(10) * 0.005;
fs->maxage = 1.0 / fs->dt;
vinit(fs->obs, DEF_OBS[0], DEF_OBS[1], DEF_OBS[2]);
fs->v = 0.0;
fs->alpha = DEF_ALPHA;
fs->beta = DEF_BETA;
/* initialise texture stuff */
if (do_texture)
inittextures(mi);
else
{
fs->ttexture = (XImage*) NULL;
fs->gtexture = (XImage*) NULL;
}
if (MI_IS_DEBUG(mi)) {
(void) fprintf(stderr,
"%s:\n\tnum_part=%d\n\ttrees=%d\n\tfog=%s\n\tshadows=%s\n\teject_r=%.3f\n\tridtri=%.3f\n",
MI_NAME(mi),
fs->np,
fs->num_trees,
fs->fog ? "on" : "off",
fs->shadows ? "on" : "off",
fs->eject_r, fs->ridtri);
}
/* initialise particles and trees */
for (i = 0; i < fs->np; i++) {
setnewpart(fs, &(fs->p[i]));
}
if (fs->num_trees)
if (!inittree(mi)) {
return False;
}
/* if no fire particles then initialise rain particles */
if (!fs->np)
{
vinit(fs->min,-7.0f,-0.2f,-7.0f);
vinit(fs->max,7.0f,8.0f,7.0f);
for (i = 0; i < NUMPART; i++) {
setnewrain(fs, &(fs->r[i]));
}
}
return True;
}
/* set rain particle values */
static void setpartrain(firestruct * fs, rain * r, float dt)
{
r->age += dt;
vadds(r->vel,dt,r->acc);
vadds(r->pos,dt,r->vel);
if(r->pos[0]<fs->min[0])
r->pos[0]=fs->max[0]-(fs->min[0]-r->pos[0]);
if(r->pos[2]<fs->min[2])
r->pos[2]=fs->max[2]-(fs->min[2]-r->pos[2]);
if(r->pos[0]>fs->max[0])
r->pos[0]=fs->min[0]+(r->pos[0]-fs->max[0]);
if(r->pos[2]>fs->max[2])
r->pos[2]=fs->min[2]+(r->pos[2]-fs->max[2]);
vequ(r->oldpos,r->pos);
vadds(r->oldpos,-(r->partLength),r->vel);
if(r->pos[1]<fs->min[1])
setnewrain(fs, r);
}
static Bool Init(ModeInfo * mi)
{
int i;
firestruct *fs = &fire[MI_SCREEN(mi)];
/* default settings */
fs->eject_r = 0.1 + NRAND(10) * 0.03;
fs->dt = 0.015;
fs->eject_vy = 4;
fs->eject_vl = 1;
fs->ridtri = 0.1 + NRAND(10) * 0.005;
fs->maxage = 1.0 / fs->dt;
vinit(fs->obs, DEF_OBS[0], DEF_OBS[1], DEF_OBS[2]);
fs->v = 0.0;
fs->alpha = DEF_ALPHA;
fs->beta = DEF_BETA;
/* initialise texture stuff */
if (do_texture)
inittextures(mi);
else
{
fs->ttexture = (XImage*) NULL;
fs->gtexture = (XImage*) NULL;
}
if (MI_IS_DEBUG(mi)) {
(void) fprintf(stderr,
"%s:\n\tnum_part=%d\n\ttrees=%d\n\tfog=%s\n\tshadows=%s\n\teject_r=%.3f\n\tridtri=%.3f\n",
MI_NAME(mi),
fs->np,
fs->num_trees,
fs->fog ? "on" : "off",
fs->shadows ? "on" : "off",
fs->eject_r, fs->ridtri);
}
glShadeModel(GL_FLAT);
glEnable(GL_DEPTH_TEST);
/* makes particles blend with background */
if (!MI_IS_WIREFRAME(mi)||(!fs->np))
{
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
/* fog stuff */
glEnable(GL_FOG);
glFogi(GL_FOG_MODE, GL_EXP);
glFogfv(GL_FOG_COLOR, fogcolor);
glFogf(GL_FOG_DENSITY, 0.03);
glHint(GL_FOG_HINT, GL_NICEST);
/* initialise particles and trees */
for (i = 0; i < fs->np; i++) {
setnewpart(fs, &(fs->p[i]));
}
if (fs->num_trees)
if (!inittree(mi)) {
return False;
}
/* if no fire particles then initialise rain particles */
if (!fs->np)
{
vinit(fs->min,-7.0f,-0.2f,-7.0f);
vinit(fs->max,7.0f,8.0f,7.0f);
for (i = 0; i < NUMPART; i++) {
setnewrain(fs, &(fs->r[i]));
}
}
return True;
}