Cube  Diff

VARP(maxparticles, 100, 2000, MAXPARTICLES - 500);

static void
newparticle(const OFVector3D *o, const OFVector3D *d, int fade, int type)
{
	if (!parinit) {
		for (int i = 0; i < MAXPARTICLES; i++) {

			particles[i].next = parempty;
			parempty = &particles[i];
		}
		parinit = true;
	}
	if (parempty) {
		struct particle *p = parempty;

	glDisable(GL_BLEND);
	glDepthMask(GL_TRUE);
}

void
particle_splash(int type, int num, int fade, const OFVector3D *p)
{
	for (int i = 0; i < num; i++) {

		const int radius = type == 5 ? 50 : 150;
		int x, y, z;
		do {
			x = rnd(radius * 2) - radius;
			y = rnd(radius * 2) - radius;
			z = rnd(radius * 2) - radius;
		} while (x * x + y * y + z * z > radius * radius);
		OFVector3D d = OFMakeVector3D(x, y, z);
		newparticle(p, &d, rnd(fade * 3), type);
	}
}

void
particle_trail(int type, int fade, const OFVector3D *s, const OFVector3D *e)
{
	vdist(d, v, *s, *e);
	vdiv(v, d * 2 + 0.1f);
	OFVector3D p = *s;
	for (int i = 0; i < ((int)d * 2); i++) {

		vadd(p, v);
		OFVector3D d =
		    OFMakeVector3D(rnd(11) - 5, rnd(11) - 5, rnd(11) - 5);
		newparticle(&p, &d, rnd(fade) + fade, type);
	}
}