blender/release/plugins/sequence/scatter.c

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/**
* $Id$
*
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program 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. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#include "plugin.h"
/* ******************** GLOBAL VARIABLES ***************** */
char name[24]= "scatter";
/* structure for buttons,
* butcode name default min max 0
*/
VarStruct varstr[]= {
LABEL, "Input: 1 strip", 0.0, 0.0, 0.0, "",
NUM|INT, "seed: ", 1.0, 0.0, 10.0, "Offset in random table",
NUMSLI|FLO, "swing: ", 1.0, 0.0, 3.0, "The amplitude, width of the effect",
TOG|INT, "wrap", 0.0, 0.0, 1.0, "Cyclic wrap around the left/right edges",
NUM|INT, "type: ", 1.0, 0.0, 1.0, "Type 1 is random for each frame",
};
/* The cast struct is for input in the main doit function
Varstr and Cast must have the same variables in the same order */
typedef struct Cast {
int dummy; /* because of the 'label' button */
int seed;
float swing;
int wrap;
int type;
} Cast;
/* cfra: the current frame */
float cfra;
void plugin_seq_doit(Cast *, float, float, int, int, ImBuf *, ImBuf *, ImBuf *, ImBuf *);
/* ******************** Fixed functions ***************** */
int plugin_seq_getversion(void)
{
return B_PLUGIN_VERSION;
}
void plugin_but_changed(int but)
{
}
void plugin_init()
{
}
void plugin_getinfo(PluginInfo *info)
{
info->name= name;
info->nvars= sizeof(varstr)/sizeof(VarStruct);
info->cfra= &cfra;
info->varstr= varstr;
info->init= plugin_init;
info->seq_doit= (SeqDoit) plugin_seq_doit;
info->callback= plugin_but_changed;
}
/* ************************************************************
Scatter
************************************************************ */
static void rectcpy(ImBuf *dbuf, ImBuf *sbuf,
int destx, int desty,
int srcx, int srcy, int width, int height)
{
uint *drect,*srect;
float *dfrect, *sfrect;
int tmp;
if (dbuf == 0) return;
if (destx < 0){
srcx -= destx ;
width += destx ;
destx = 0;
}
if (srcx < 0){
destx -= srcx ;
width += destx ;
srcx = 0;
}
if (desty < 0){
srcy -= desty ;
height += desty ;
desty = 0;
}
if (srcy < 0){
desty -= srcy ;
height += desty ;
srcy = 0;
}
if (width > dbuf->x - destx) width = dbuf->x - destx;
if (height > dbuf->y - desty) height = dbuf->y - desty;
if (sbuf){
if (width > sbuf->x - srcx) width = sbuf->x - srcx;
if (height > sbuf->y - srcy) height = sbuf->y - srcy;
srect = sbuf->rect;
sfrect = sbuf->rect_float;
}
if (width <= 0) return;
if (height <= 0) return;
drect = dbuf->rect;
dfrect = dbuf->rect_float;
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tmp = (desty * dbuf->x + destx);
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if (dbuf->rect_float) dfrect += 4 * tmp;
else drect += tmp;
destx = dbuf->x;
if (sbuf) {
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tmp = (srcy * sbuf->x + srcx );
if (dbuf->rect_float) sfrect += 4 * tmp;
else srect += tmp;
srcx = sbuf->x;
} else{
if (dbuf->rect_float) sfrect = dfrect;
else srect = drect;
srcx = destx;
}
for (;height > 0; height--){
if (dbuf->rect_float) {
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memcpy(dfrect,sfrect, 4 * width * sizeof(float));
dfrect += destx;
sfrect += srcx;
} else {
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memcpy(drect,srect, width * sizeof(int));
drect += destx;
srect += srcx;
}
}
}
static void fill_out(ImBuf *out, float r, float g, float b, float a)
{
int tot,x;
float *rectf = out->rect_float;
unsigned char *rect = (unsigned char *)out->rect;
tot = out->x * out->y;
if (out->rect_float) {
for (x = 0;x < tot; x++) {
rectf[0] = r;
rectf[1] = g;
rectf[2] = b;
rectf[3] = a;
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rectf += 4;
}
} else {
for (x=0;x < tot;x++) {
rect[0] = (int)(r * 255);
rect[1] = (int)(g * 255);
rect[2] = (int)(b * 255);
rect[3] = (int)(a * 255);
rect += 4;
}
}
}
void plugin_seq_doit(Cast *cast, float facf0, float facf1, int sx, int sy, ImBuf *ibuf1, ImBuf *ibuf2, ImBuf *out, ImBuf *use)
{
float f1, f2, t1, t2, t3;
int x, y, lr;
/* fill imbuf 'out' with black */
fill_out(out, 0,0,0,0);
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switch (cast->type) {
case 0:
srand48(cast->seed);
break;
case 1:
srand48(cast->seed + facf0 * 1000);
break;
}
for (y = 0; y < sy; y++) {
switch (cast->type) {
case 0:
if ((y & 1) == 0) {
f1 = drand48() - 0.5;
f2 = drand48() - 0.5;
f1 = cast->swing * f1;
f2 = cast->swing * f2;
if (cast->wrap) f2 += 1.0;
lr = drand48()>0.5;
t1 = facf0;
} else t1 = facf1;
t2 = 1.0 - t1;
t3 = 3.0 * (f1 * t1 * t1 * t2 + f2 * t1 * t2 * t2);
if (cast->wrap) t3 += t2 * t2 * t2;
x = sx * t3;
if (lr) x = -x;
break;
case 1:
f1 = drand48() - 0.5;
f1 = f1 * cast->swing;
if ((y & 1) == 0) f1 *= facf0;
else f1 *= facf1;
x = f1 * sx;
break;
}
rectcpy(out, ibuf1, 0, y, x, y, 32767, 1);
if (cast->wrap) {
rectcpy(out, ibuf1, 0, y, x + sx, y, 32767, 1);
rectcpy(out, ibuf1, 0, y, x + sx + sx, y, 32767, 1);
rectcpy(out, ibuf1, 0, y, x - sx, y, 32767, 1);
rectcpy(out, ibuf1, 0, y, x - sx - sx, y, 32767, 1);
}
}
}