changes towards GL_ARB_point_sprite (two-zero)
diff --git a/progs/demos/spriteblast.c b/progs/demos/spriteblast.c
index f1eee69..4e1d86c 100644
--- a/progs/demos/spriteblast.c
+++ b/progs/demos/spriteblast.c
@@ -56,7 +56,7 @@
static GLfloat pointVelocity[MAX_POINTS][2];
static GLfloat pointDirection[MAX_POINTS][2];
static int colorList[MAX_POINTS];
-static int animate = 1, motion = 0;
+static int animate = 1, motion = 0, org = 0, sprite = 1, smooth = 1;
static GLfloat colorSet[][4] = {
/* Shades of red. */
@@ -240,17 +240,19 @@
if (blend)
glEnable(GL_BLEND);
- glEnable(GL_TEXTURE_2D);
+ if (sprite) {
+ glEnable(GL_TEXTURE_2D);
#ifdef GL_ARB_point_sprite
- glEnable(GL_POINT_SPRITE_ARB);
+ glEnable(GL_POINT_SPRITE_ARB);
#endif
+ }
glColor3f(1,1,1);
glBegin(GL_POINTS);
for (i=0; i<numPoints; i++) {
/* Draw alive particles. */
if (colorList[i] != DEAD) {
- /*glColor4fv(colorSet[colorList[i]]);*/
+ if (!sprite) glColor4fv(colorSet[colorList[i]]);
glVertex3fv(pointList[i]);
}
}
@@ -326,9 +328,11 @@
#endif
case 8:
glEnable(GL_POINT_SMOOTH);
+ smooth = 1;
break;
case 9:
glDisable(GL_POINT_SMOOTH);
+ smooth = 0;
break;
case 10:
glPointSize(4.0);
@@ -383,6 +387,47 @@
makePointList();
glutIdleFunc(idle);
break;
+ case 'o':
+ case 'O':
+ org ^= 1;
+#if GL_VERSION_2_0
+#if GL_ARB_point_parameters
+ glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,
+ org ? GL_LOWER_LEFT : GL_UPPER_LEFT);
+#endif
+#endif
+ glutPostRedisplay();
+ break;
+ case 't':
+ case 'T':
+ sprite ^= 1;
+ glutPostRedisplay();
+ break;
+ case 's':
+ case 'S':
+ (smooth ^= 1) ? glEnable(GL_POINT_SMOOTH) : glDisable(GL_POINT_SMOOTH);
+ glutPostRedisplay();
+ break;
+ case '0':
+ glPointSize(1.0);
+ glutPostRedisplay();
+ break;
+ case '1':
+ glPointSize(2.0);
+ glutPostRedisplay();
+ break;
+ case '2':
+ glPointSize(4.0);
+ glutPostRedisplay();
+ break;
+ case '3':
+ glPointSize(8.0);
+ glutPostRedisplay();
+ break;
+ case '4':
+ glPointSize(16.0);
+ glutPostRedisplay();
+ break;
case 27:
exit(0);
}