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path: root/src/modules/sparkler/sparkler.c
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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_module_context.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_setup_t {
	til_setup_t		til_setup;
	unsigned		show_bsp_leafs:1;
	unsigned		show_bsp_matches:1;
	unsigned		show_bsp_matches_affected_only:1;
	unsigned		show_bsp_leafs_min_depth;
} sparkler_setup_t;

typedef struct sparkler_context_t {
	til_module_context_t	til_module_context;
	particles_t		*particles;
	sparkler_setup_t	*setup;
} sparkler_context_t;

extern particle_ops_t	simple_ops;

static til_module_context_t * sparkler_create_context(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup)
{
	sparkler_context_t	*ctxt;

	ctxt = til_module_context_new(module, sizeof(sparkler_context_t), stream, seed, ticks, n_cpus, setup);
	if (!ctxt)
		return NULL;

	ctxt->setup = (sparkler_setup_t *)setup;

	ctxt->particles = particles_new(&(particles_conf_t){
						.show_bsp_leafs = ((sparkler_setup_t *)setup)->show_bsp_leafs,
						.show_bsp_matches = ((sparkler_setup_t *)setup)->show_bsp_matches,
						.show_bsp_leafs_min_depth = ((sparkler_setup_t *)setup)->show_bsp_leafs_min_depth,
						.show_bsp_matches_affected_only = ((sparkler_setup_t *)setup)->show_bsp_matches_affected_only,
						.seedp = &ctxt->til_module_context.seed,
					});
	if (!ctxt->particles)
		return til_module_context_free(&ctxt->til_module_context);

	particles_add_particles(ctxt->particles, NULL, &simple_ops, INIT_PARTS, 0);

	return &ctxt->til_module_context;
}


static void sparkler_destroy_context(til_module_context_t *context)
{
	sparkler_context_t	*ctxt = (sparkler_context_t *)context;

	if (ctxt->particles)
		particles_free(ctxt->particles);

	free(ctxt);
}


static void sparkler_prepare_frame(til_module_context_t *context, til_stream_t *stream, unsigned ticks, til_fb_fragment_t **fragment_ptr, til_frame_plan_t *res_frame_plan)
{
	sparkler_context_t	*ctxt = (sparkler_context_t *)context;
	til_fb_fragment_t	*fragment = *fragment_ptr;

	*res_frame_plan = (til_frame_plan_t){ .fragmenter = til_fragmenter_slice_per_cpu };

	if (ctxt->setup->show_bsp_matches)
		til_fb_fragment_clear(fragment);

	particles_sim(ctxt->particles, fragment);
	particles_add_particles(ctxt->particles, NULL, &simple_ops, INIT_PARTS / 4, 0);
	particles_age(ctxt->particles);
}


/* Render a 3D particle system */
static void sparkler_render_fragment(til_module_context_t *context, til_stream_t *stream, unsigned ticks, unsigned cpu, til_fb_fragment_t **fragment_ptr)
{
	sparkler_context_t	*ctxt = (sparkler_context_t *)context;
	til_fb_fragment_t	*fragment = *fragment_ptr;

	if (!ctxt->setup->show_bsp_matches)
		til_fb_fragment_clear(fragment);

	particles_draw(ctxt->particles, fragment);
}


static int sparkler_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup);


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>",
};


/* Settings hooks for configurable variables */
static int sparkler_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup)
{
	til_setting_t	*show_bsp_leafs;
	til_setting_t	*show_bsp_leafs_min_depth;
	til_setting_t	*show_bsp_matches;
	til_setting_t	*show_bsp_matches_affected_only;
	const char	*values[] = {
			       "off",
			       "on",
			       NULL
			};
	int		r;

	r = til_settings_get_and_describe_setting(settings,
						&(til_setting_spec_t){
							.name = "Show BSP-tree 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->value, "on")) {
		const char	*depth_values[] = {
					"0",
					"4",
					"6",
					"8",
					"10",
					NULL
				};

		r = til_settings_get_and_describe_setting(settings,
							&(til_setting_spec_t){
								.name = "Minimum BSP-tree depth for shown leaf-nodes",
								.key = "show_bsp_leafs_min_depth",
								.preferred = "8",
								.values = depth_values
							},
							&show_bsp_leafs_min_depth,
							res_setting,
							res_desc);
		if (r)
			return r;
	}

	r = til_settings_get_and_describe_setting(settings,
						&(til_setting_spec_t){
							.name = "Show BSP-tree search broad-phase match candidates",
							.key = "show_bsp_matches",
							.preferred = "off",
							.values = values
						},
						&show_bsp_matches,
						res_setting,
						res_desc);
	if (r)
		return r;

	if (!strcasecmp(show_bsp_matches->value, "on")) {
		r = til_settings_get_and_describe_setting(settings,
							&(til_setting_spec_t){
								.name = "Show only narrow-phase affected match results",
								.key = "show_bsp_matches_affected_only",
								.preferred = "off",
								.values = values
							},
							&show_bsp_matches_affected_only,
							res_setting,
							res_desc);
		if (r)
			return r;

	}

	if (res_setup) {
		sparkler_setup_t	*setup;

		setup = til_setup_new(settings, sizeof(*setup), NULL, &sparkler_module);
		if (!setup)
			return -ENOMEM;

		if (!strcasecmp(show_bsp_leafs->value, "on")) {
			setup->show_bsp_leafs = 1;

			if (sscanf(show_bsp_leafs_min_depth->value, "%u", &setup->show_bsp_leafs_min_depth) != 1)
				return til_setup_free_with_failed_setting_ret_err(&setup->til_setup, show_bsp_leafs_min_depth, res_setting, -EINVAL);
		}

		if (!strcasecmp(show_bsp_matches->value, "on")) {
			setup->show_bsp_matches = 1;

			if (!strcasecmp(show_bsp_matches_affected_only->value, "on"))
				setup->show_bsp_matches_affected_only = 1;
		}

		*res_setup = &setup->til_setup;
	}

	return 0;
}
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