/* * Copyright (c) 1999, Not a Number / NeoGeo b.v. * */ #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 */ rectop(out, 0,0,0,0,0,32767,32767,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; } rectop(out, ibuf1, 0, y, x, y, 32767, 1, rectcpy, 0); if (cast->wrap) { rectop(out, ibuf1, 0, y, x + sx, y, 32767, 1, rectcpy, 0); rectop(out, ibuf1, 0, y, x + sx + sx, y, 32767, 1, rectcpy, 0); rectop(out, ibuf1, 0, y, x - sx, y, 32767, 1, rectcpy, 0); rectop(out, ibuf1, 0, y, x - sx - sx, y, 32767, 1, rectcpy, 0); } } }