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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"
#include "../include/infinity.h"
u_long id = 1188927899;
u_long options = BE_DISPLACE;
char dname[] = "Infinity";
char desc[] = "Infinity effect";
/* Infinity plugin port.
* Original source code has been heavily modified, to take only
* the vector fields. So modified it's nearly a rewrite.
* Changes have also been made to reflect style(9).
* See the original infinity plugin source code for exact details
*/
#define NB_FCT 6
static t_complex
fct(t_complex a, guint32 n, gint32 p1, gint32 p2) /* p1 et p2:0-4 */
{
t_complex b;
gfloat fact;
gfloat an;
gfloat circle_size;
gfloat speed;
gfloat co,si;
a.x -= HWIDTH;
a.y -= HHEIGHT;
switch (n) {
case 0:
an = 0.025*(p1-2)+0.002;
co = cosf(an);
si = sinf(an);
circle_size = HEIGHT*0.25;
speed = (gfloat)2000+p2*500;
b.x = (co*a.x-si*a.y);
b.y = (si*a.x+co*a.y);
fact = -(sqrtf(b.x*b.x+b.y*b.y)-circle_size)/speed+1;
b.x = (b.x*fact);
b.y = (b.y*fact);
break;
case 1:
an = 0.015*(p1-2)+0.002;
co = cosf(an);
si = sinf(an);
circle_size = HEIGHT*0.45;
speed = (gfloat)4000+p2*1000;
b.x = (co*a.x-si*a.y);
b.y = (si*a.x+co*a.y);
fact = (sqrtf(b.x*b.x+b.y*b.y)-circle_size)/speed+1;
b.x = (b.x*fact);
b.y = (b.y*fact);
break;
case 2:
an = 0.002;
co = cosf(an);
si = sinf(an);
circle_size = HEIGHT*0.25;
speed = (gfloat)400+p2*100;
b.x = (co*a.x-si*a.y);
b.y = (si*a.x+co*a.y);
fact = -(sqrtf(b.x*b.x+b.y*b.y)-circle_size)/speed+1;
b.x = (b.x*fact);
b.y = (b.y*fact);
break;
case 3:
an = (sinf(sqrtf(a.x*a.x+a.y*a.y)/20)/20)+0.002;
co = cosf(an);
si = sinf(an);
circle_size = HEIGHT*0.25;
speed = (gfloat)4000;
b.x = (co*a.x-si*a.y);
b.y = (si*a.x+co*a.y);
fact = -(sqrtf(b.x*b.x+b.y*b.y)-circle_size)/speed+1;
b.x = (b.x*fact);
b.y = (b.y*fact);
break;
case 4:
an = 0.002;
co = cosf(an);
si = sinf(an);
circle_size = HEIGHT*0.25;
speed = sinf(sqrtf(a.x*a.x+a.y*a.y)/5)*3000+4000;
b.x = (co*a.x-si*a.y);
b.y = (si*a.x+co*a.y);
fact = -(sqrtf(b.x*b.x+b.y*b.y)-circle_size)/speed+1;
b.x = (b.x*fact);
b.y = (b.y*fact);
break;
case 5:
an = 0.002;
co = cosf(an);
si = sinf(an);
circle_size = HEIGHT*0.25;
fact = 1+cosf(atanf(a.x/(a.y+0.00001))*6)*0.02;
b.x = (co*a.x-si*a.y);
b.y = (si*a.x+co*a.y);
b.x = (b.x*fact);
b.y = (b.y*fact);
break;
default:
b.x = 0.0;
b.y = 0.0;
}
b.x += HWIDTH;
b.y += HHEIGHT;
if (b.x < 0.0 )
b.x = 0.0;
if (b.y < 0.0)
b.y = 0.0;
if (b.x > (gfloat)MAXX)
b.x = (gfloat)MAXX;
if (b.y > (gfloat)MAXY)
b.y = (gfloat)MAXY;
return b;
}
/* Biniou plugin callbacks */
static u_char num_effect = 0;
static BTimer_t *timer = NULL;
static Shuffler_t *shuffler = NULL;
static VectorField_t *vf = NULL;
void
create(__attribute__ ((unused)) Context_t *ctx)
{
vf = VectorField_new(NB_FCT, &fct);
timer = b_timer_new();
shuffler = Shuffler_new(NB_FCT);
}
void
destroy(__attribute__ ((unused)) Context_t *ctx)
{
VectorField_delete(vf);
b_timer_delete(timer);
Shuffler_delete(shuffler);
}
void
on_switch_on(__attribute__ ((unused)) Context_t *ctx)
{
num_effect = Shuffler_get(shuffler);
b_timer_start(timer);
}
void
run(Context_t *ctx)
{
/* printf("oOo %s:%d: effect= %d\n", __FILE__, __LINE__, num_effect); */
VectorField_run(vf, ctx, num_effect);
/* TODO remove hardcoded 5 seconds delay */
if (b_timer_elapsed(timer) > 5)
on_switch_on(ctx);
}
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