Merge build system cleanups

- Move source to src/ subdir
- Use $(top_srcdir)/src instead of ../../

1 files changed, 144 insertions, 0 deletions

diff --git a/src/modules/sparkler/rocket.c b/src/modules/sparkler/rocket.c
new file mode 100644
index 0000000..6b9dc5e
--- /dev/null
+++ b/src/modules/sparkler/rocket.c
@@ -0,0 +1,144 @@
+#include <stdlib.h>
+
+#include "draw.h"
+#include "particle.h"
+#include "particles.h"
+
+/* a "rocket" particle type */
+#define ROCKET_MAX_DECAY_RATE	20
+#define ROCKET_MIN_DECAY_RATE	2
+#define ROCKET_MAX_LIFETIME	500
+#define ROCKET_MIN_LIFETIME	300
+#define ROCKETS_MAX		20
+#define ROCKETS_XPLODE_MIN_SIZE	2000
+#define ROCKETS_XPLODE_MAX_SIZE	8000
+
+extern particle_ops_t burst_ops;
+extern particle_ops_t spark_ops;
+extern particle_ops_t xplode_ops;
+
+static unsigned rockets_cnt;
+
+typedef struct rocket_ctxt_t {
+	int		decay_rate;
+	int		longevity;
+	v3f_t		wander;
+	float		last_velocity;	/* cache velocity to sense violent accelerations and explode when they happen */
+} rocket_ctxt_t;
+
+
+static int rocket_init(particles_t *particles, particle_t *p)
+{
+	rocket_ctxt_t	*ctxt = p->ctxt;
+
+	if (rockets_cnt >= ROCKETS_MAX) {
+		return 0;
+	}
+	rockets_cnt++;
+
+	ctxt->decay_rate = rand_within_range(ROCKET_MIN_DECAY_RATE, ROCKET_MAX_DECAY_RATE);
+	ctxt->longevity = rand_within_range(ROCKET_MIN_LIFETIME, ROCKET_MAX_LIFETIME);
+
+	ctxt->wander.x = (float)(rand_within_range(0, 628) - 314) / 10000.0f;
+	ctxt->wander.y = (float)(rand_within_range(0, 628) - 314) / 10000.0f;
+	ctxt->wander.z = (float)(rand_within_range(0, 628) - 314) / 10000.0f;
+	ctxt->wander = v3f_normalize(&ctxt->wander);
+
+	ctxt->last_velocity = p->props->velocity;
+	p->props->drag = 0.4;
+	p->props->mass = 0.8;
+
+	return 1;
+}
+
+
+static particle_status_t rocket_sim(particles_t *particles, particle_t *p)
+{
+	rocket_ctxt_t	*ctxt = p->ctxt;
+	int		i, n_sparks;
+
+	if (!ctxt->longevity ||
+	    (ctxt->longevity -= ctxt->decay_rate) <= 0 ||
+	    p->props->velocity - ctxt->last_velocity > p->props->velocity * .05) {	/* explode if accelerated too hard (burst) */
+		int	n_xplode;
+		/* on death we explode */
+
+		ctxt->longevity = 0;
+
+		/* add a burst shockwave particle at our location
+		 * TODO: need way to supply particle-type-specific parameters at spawn (burst size should derive from n_xplode)
+		 */
+		particles_spawn_particle(particles, p, NULL, &burst_ops);
+
+		/* add a bunch of new explosion particles */
+		/* TODO: also particle-type-specific parameters, colors!  rocket bursts should be able to vary the color. */
+		n_xplode = rand_within_range(ROCKETS_XPLODE_MIN_SIZE, ROCKETS_XPLODE_MAX_SIZE);
+		for (i = 0; i < n_xplode; i++) {
+			particle_props_t	props = *p->props;
+			particle_ops_t		*ops = &xplode_ops;
+
+			props.direction.x = ((float)(rand_within_range(0, 314159 * 2) - 314159) / 100000.0);
+			props.direction.y = ((float)(rand_within_range(0, 314159 * 2) - 314159) / 100000.0);
+			props.direction.z = ((float)(rand_within_range(0, 314159 * 2) - 314159) / 100000.0);
+			props.direction = v3f_normalize(&props.direction);
+
+			//props->velocity = ((float)rand_within_range(100, 200) / 100000.0);
+			props.velocity = ((float)rand_within_range(100, 300) / 100000.0);
+			particles_spawn_particle(particles, p, &props, ops);
+		}
+		return PARTICLE_DEAD;
+	}
+
+#if 1
+	/* FIXME: this isn't behaving as intended */
+	p->props->direction = v3f_add(&p->props->direction, &ctxt->wander);
+	p->props->direction = v3f_normalize(&p->props->direction);
+#endif
+	p->props->velocity += .00003;
+
+	/* spray some sparks behind the rocket */
+	n_sparks = rand_within_range(10, 40);
+	for (i = 0; i < n_sparks; i++) {
+		particle_props_t	props = *p->props;
+
+		props.direction = v3f_negate(&props.direction);
+
+		props.direction.x += (float)(rand_within_range(0, 40) - 20) / 100.0;
+		props.direction.y += (float)(rand_within_range(0, 40) - 20) / 100.0;
+		props.direction.z += (float)(rand_within_range(0, 40) - 20) / 100.0;
+		props.direction = v3f_normalize(&props.direction);
+
+		props.velocity = (float)rand_within_range(10, 50) / 100000.0;
+		particles_spawn_particle(particles, p, &props, &spark_ops);
+	}
+
+	ctxt->last_velocity = p->props->velocity;
+
+	return PARTICLE_ALIVE;
+}
+
+
+static void rocket_draw(particles_t *particles, particle_t *p, int x, int y, fb_fragment_t *f)
+{
+	rocket_ctxt_t	*ctxt = p->ctxt;
+
+	if (!draw_pixel(f, x, y, 0xff0000)) {
+		/* kill off parts that wander off screen */
+		ctxt->longevity = 0;
+	}
+}
+
+
+static void rocket_cleanup(particles_t *particles, particle_t *p)
+{
+	rockets_cnt--;
+}
+
+
+particle_ops_t	rocket_ops = {
+			.context_size = sizeof(rocket_ctxt_t),
+			.sim = rocket_sim,
+			.init = rocket_init,
+			.draw = rocket_draw,
+			.cleanup = rocket_cleanup,
+		};