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- /**
- * $Id: scatter.c,v 1.2 2003/05/02 20:52:58 sirdude Exp $
- *
- * ***** 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
-
- with usage of ImBuf rect operation.
-
- ************************************************************ */
-
- static void ibufrectop(ImBuf *dbuf, ImBuf *sbuf,
- int destx, int desty,
- int srcx, int srcy, int width, int height,
- void (*operation)(),
- int value)
- {
- uint *drect,*srect;
-
- if (dbuf == 0) return;
- if (operation == 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;
- }
-
- if (width <= 0) return;
- if (height <= 0) return;
-
- drect = dbuf->rect;
- if (sbuf) srect = sbuf->rect;
-
- drect += desty * dbuf->x;
- drect += destx;
- destx = dbuf->x;
-
- if (sbuf) {
- srect += srcy * sbuf->x;
- srect += srcx;
- srcx = sbuf->x;
- } else{
- srect = drect;
- srcx = destx;
- }
-
- for (;height > 0; height--){
- operation(drect, srect, width, value);
- drect += destx;
- srect += srcx;
- }
- }
-
- static void rectcpy(uint *drect, uint *srect, int x) {
- memcpy(drect,srect, x * sizeof(int));
- }
-
- static void rectfill(uint *drect, uint *srect, int x, int value)
- {
- for (;x > 0; x--) *drect++ = value;
- }
-
-
- 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 */
- ibufrectop(out, ibuf1,0,0,0,0,32767,32767,rectfill, 0);
-
- 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;
- }
-
- ibufrectop(out, ibuf1, 0, y, x, y, 32767, 1, rectcpy, 0);
- if (cast->wrap) {
- ibufrectop(out, ibuf1, 0, y, x + sx, y, 32767, 1, rectcpy, 0);
- ibufrectop(out, ibuf1, 0, y, x + sx + sx, y, 32767, 1, rectcpy, 0);
- ibufrectop(out, ibuf1, 0, y, x - sx, y, 32767, 1, rectcpy, 0);
- ibufrectop(out, ibuf1, 0, y, x - sx - sx, y, 32767, 1, rectcpy, 0);
- }
- }
- }
-
-