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#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "til.h"
#include "til_fb.h"
#include "til_util.h"
#include "particles.h"
/* particle system gadget (C) Vito Caputo <vcaputo@pengaru.com> 2/15/2014 */
/* 1/10/2015 added octree bsp (though not yet leveraged) */
/* 11/25/2016 refactor and begun adapting to rototiller */
#define INIT_PARTS 100
typedef struct sparkler_context_t {
particles_t *particles;
unsigned n_cpus;
} sparkler_context_t;
extern particle_ops_t simple_ops;
static particles_conf_t sparkler_conf;
static void * sparkler_create_context(unsigned ticks, unsigned num_cpus)
{
static int initialized;
sparkler_context_t *ctxt;
if (!initialized) {
srand(time(NULL) + getpid());
initialized = 1;
}
ctxt = calloc(1, sizeof(sparkler_context_t));
if (!ctxt)
return NULL;
ctxt->particles = particles_new(&sparkler_conf);
if (!ctxt->particles) {
free(ctxt);
return NULL;
}
particles_add_particles(ctxt->particles, NULL, &simple_ops, INIT_PARTS);
return ctxt;
}
static void sparkler_destroy_context(void *context)
{
sparkler_context_t *ctxt = context;
particles_free(ctxt->particles);
free(ctxt);
}
static int sparkler_fragmenter(void *context, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
{
sparkler_context_t *ctxt = context;
return til_fb_fragment_slice_single(fragment, ctxt->n_cpus, number, res_fragment);
}
static void sparkler_prepare_frame(void *context, unsigned ticks, unsigned ncpus, til_fb_fragment_t *fragment, til_fragmenter_t *res_fragmenter)
{
sparkler_context_t *ctxt = context;
*res_fragmenter = sparkler_fragmenter;
ctxt->n_cpus = ncpus;
if (sparkler_conf.show_bsp_matches)
til_fb_fragment_zero(fragment);
particles_sim(ctxt->particles, fragment);
particles_add_particles(ctxt->particles, NULL, &simple_ops, INIT_PARTS / 4);
particles_age(ctxt->particles);
}
/* Render a 3D particle system */
static void sparkler_render_fragment(void *context, unsigned ticks, unsigned cpu, til_fb_fragment_t *fragment)
{
sparkler_context_t *ctxt = context;
if (!sparkler_conf.show_bsp_matches)
til_fb_fragment_zero(fragment);
particles_draw(ctxt->particles, fragment);
}
/* Settings hooks for configurable variables */
static int sparkler_setup(const til_settings_t *settings, const til_setting_t **res_setting, const til_setting_desc_t **res_desc)
{
const char *show_bsp_leafs;
const char *show_bsp_matches;
const char *values[] = {
"off",
"on",
NULL
};
int r;
/* TODO: return -EINVAL on parse errors? */
r = til_settings_get_and_describe_value(settings,
&(til_setting_desc_t){
.name = "Show BSP Leaf Node Bounding Boxes",
.key = "show_bsp_leafs",
.preferred = "off",
.values = values
},
&show_bsp_leafs,
res_setting,
res_desc);
if (r)
return r;
if (!strcasecmp(show_bsp_leafs, "on")) {
const char *depth_values[] = {
"0",
"4",
"6",
"8",
"10",
NULL
};
const char *show_bsp_leafs_min_depth;
sparkler_conf.show_bsp_leafs = 1;
r = til_settings_get_and_describe_value(settings,
&(til_setting_desc_t){
.name = "Show BSP Leaf Node Bounding Boxes Minimum Depth",
.key = "show_bsp_leafs_min_depth",
.preferred = "8",
.values = depth_values
},
&show_bsp_leafs_min_depth,
res_setting,
res_desc);
if (r)
return r;
sscanf(show_bsp_leafs_min_depth, "%u", &sparkler_conf.show_bsp_leafs_min_depth);
} else {
sparkler_conf.show_bsp_leafs = 0;
}
r = til_settings_get_and_describe_value(settings,
&(til_setting_desc_t){
.name = "Show BSP Search Matches",
.key = "show_bsp_matches",
.preferred = "off",
.values = values
},
&show_bsp_matches,
res_setting,
res_desc);
if (r)
return r;
if (!strcasecmp(show_bsp_matches, "on"))
sparkler_conf.show_bsp_matches = 1;
else
sparkler_conf.show_bsp_matches = 0;
if (!strcasecmp(show_bsp_matches, "on")) {
const char *show_bsp_matches_affected_only;
r = til_settings_get_and_describe_value(settings,
&(til_setting_desc_t){
.name = "Show Only Affected BSP Search Matches",
.key = "show_bsp_matches_affected_only",
.preferred = "off",
.values = values
},
&show_bsp_matches_affected_only,
res_setting,
res_desc);
if (r)
return r;
if (!strcasecmp(show_bsp_matches_affected_only, "on"))
sparkler_conf.show_bsp_matches_affected_only = 1;
else
sparkler_conf.show_bsp_matches_affected_only = 0;
}
return 0;
}
til_module_t sparkler_module = {
.create_context = sparkler_create_context,
.destroy_context = sparkler_destroy_context,
.prepare_frame = sparkler_prepare_frame,
.render_fragment = sparkler_render_fragment,
.setup = sparkler_setup,
.name = "sparkler",
.description = "Particle system with spatial interactions (threaded (poorly))",
.author = "Vito Caputo <vcaputo@pengaru.com>",
};
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