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added n-key to toggle nice fog, other minor clean-ups

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This commit is contained in:
Brian Paul 2001-02-16 21:48:16 +00:00
parent 4539e9195d
commit 8a42f6b359
1 changed files with 33 additions and 5 deletions
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38
progs/demos/fire.c
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@ -73,6 +73,7 @@ static int HEIGHT = 480;
static GLint T0 = 0;
static GLint Frames = 0;
static GLint NiceFog = 1;
#define DIMP 20.0
#define DIMTP 16.0
@ -379,6 +380,11 @@ drawfire(void)
dojoy();
if (NiceFog)
glHint(GL_FOG_HINT, GL_NICEST);
else
glHint(GL_FOG_HINT, GL_DONT_CARE);
glEnable(GL_DEPTH_TEST);
if (fog)
@ -401,6 +407,7 @@ drawfire(void)
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, groundid);
#if 1
glBegin(GL_QUADS);
glTexCoord2fv(qt[0]);
glVertex3fv(q[0]);
@ -411,6 +418,26 @@ drawfire(void)
glTexCoord2fv(qt[3]);
glVertex3fv(q[3]);
glEnd();
#else
/* Subdivide the ground into a bunch of quads. This improves fog
* if GL_FOG_HINT != GL_NICEST
*/
{
float x, y;
float dx = 1.0, dy = 1.0;
glBegin(GL_QUADS);
for (y = -DIMP; y < DIMP; y += 1.0) {
for (x = -DIMP; x < DIMP; x += 1.0) {
glTexCoord2f(0, 0); glVertex3f(x, 0, y);
glTexCoord2f(1, 0); glVertex3f(x+dx, 0, y);
glTexCoord2f(1, 1); glVertex3f(x+dx, 0, y+dy);
glTexCoord2f(0, 1); glVertex3f(x, 0, y+dy);
}
}
glEnd();
}
#endif
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_GEQUAL, 0.9);
@ -517,6 +544,7 @@ special(int key, int x, int y)
beta += 2.0;
break;
}
glutPostRedisplay();
}
static void
@ -564,7 +592,12 @@ key(unsigned char key, int x, int y)
fullscreen = (!fullscreen);
break;
#endif
case 'n':
NiceFog = !NiceFog;
printf("NiceFog %d\n", NiceFog);
break;
}
glutPostRedisplay();
}
static void
@ -668,8 +701,6 @@ main(int ac, char **av)
/* Default settings */
WIDTH = 640;
HEIGHT = 480;
np = 800;
eject_r = 0.1;
dt = 0.015;
@ -713,9 +744,6 @@ main(int ac, char **av)
glFogi(GL_FOG_MODE, GL_EXP);
glFogfv(GL_FOG_COLOR, fogcolor);
glFogf(GL_FOG_DENSITY, 0.1);
#ifdef FX
glHint(GL_FOG_HINT, GL_NICEST);
#endif
p = malloc(sizeof(part) * np);