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/*
* Copyright 1994-2012 Olivier Girondel
*
* This file is part of lebiniou.
*
* lebiniou is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* lebiniou is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with lebiniou. If not, see <http://www.gnu.org/licenses/>.
*/
#include "context.h"
u_long id = 1100375479;
u_long options = BE_SFX2D|BEQ_NORANDOM;
u_long mode = OVERLAY;
char desc[] = "Critters demo";
struct Critter {
Pixel_t color; /* critter color */
Point2d_t pos; /* critter position */
};
static struct Critter *critters = NULL;
static u_short nb_critters = 0;
#define SAFE 50
#define STEP 50
/* da funky function */
static void
randomize(struct Critter *c)
{
c->color = b_rand_int_range(1, 254);
/* TODO better random start */
c->pos.x = b_rand_int_range(MINX+SAFE, MAXX-SAFE);
c->pos.y = b_rand_int_range(MINY+SAFE, MAXY-SAFE);
}
void
run(Context_t *ctx)
{
Buffer8_t *dst = passive_buffer(ctx);
u_short i;
assert(ctx->input != NULL);
if (ctx->input == NULL)
return;
Buffer8_clear(dst);
pthread_mutex_lock(&ctx->input->mutex);
/* foreach input */
for (i = 0; i < nb_critters; i++) {
/* compute deltas */
float dx = ctx->input->data[A_LEFT ][i] * STEP;
float dy = ctx->input->data[A_RIGHT][i] * STEP;
/* compute new target */
Point2d_t tmp;
tmp.x = critters[i].pos.x + dx;
tmp.y = critters[i].pos.y + dy;
/* draw */
draw_line(dst, critters[i].pos.x, critters[i].pos.y, tmp.x, tmp.y, critters[i].color);
/* if a critter is out of screen, reset it */
if ((tmp.x < MINX) || (tmp.y < MINY)
|| (tmp.x > MAXX) || (tmp.y > MAXY)) {
randomize(&critters[i]);
} else {
/* update position */
critters[i].pos.x = tmp.x;
critters[i].pos.y = tmp.y;
}
}
pthread_mutex_unlock(&ctx->input->mutex);
}
void
randomize_all()
{
int i;
for (i = 0; i < nb_critters; i++)
randomize(&critters[i]);
}
void
on_switch_on(__attribute__ ((unused)) Context_t *ctx)
{
randomize_all();
}
void
create(Context_t *ctx)
{
if (ctx->input == NULL) {
options |= BEQ_DISABLED;
return;
}
nb_critters = ctx->input->size;
critters = xcalloc(nb_critters, sizeof(struct Critter));
if (critters == NULL)
xerror("pas de critter, trop dure la vie\n");
randomize_all();
}
void
destroy(__attribute__ ((unused)) Context_t *ctx)
{
if (critters != NULL)
xfree(critters);
}
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