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Diffstat (limited to 'release/plugins/texture/tiles.c')
| -rw-r--r-- | release/plugins/texture/tiles.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/release/plugins/texture/tiles.c b/release/plugins/texture/tiles.c new file mode 100644 index 00000000000..9977675c389 --- /dev/null +++ b/release/plugins/texture/tiles.c @@ -0,0 +1,176 @@ + /** + * $Id$ + * + * ***** 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 "math.h" +#include "plugin.h" + +/* ******************** GLOBAL VARIABLES ***************** */ + +char name[]= "tiles"; + +/* Subtype names must be less than 15 characters */ + +#define NR_TYPES 2 +char stnames[NR_TYPES][16]= {"Square", "Deformed"}; + +VarStruct varstr[]= { + NUM|FLO, "size", 1.0, 0.0, 1.0, "The size of each tile", + NUM|FLO, "Noise", 1.0, 0.01, 10.0, "" +}; + +/* 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 { + float size; + float noise; +} Cast; + +/* result: + Intensity, R, G, B, Alpha, nor.x, nor.y, nor.z + */ + +float result[8]; + +/* cfra: the current frame */ + +float cfra; + +int plugin_tex_doit(int, Cast *, float *, float *, float *); + + +/* ******************** Fixed functions ***************** */ + +int plugin_tex_getversion(void) +{ + return B_PLUGIN_VERSION; +} + +void plugin_but_changed(int but) +{ +} + +void plugin_init(void) +{ +} + +/* this function should not be changed: */ + +void plugin_getinfo(PluginInfo *info) +{ + info->name= name; + info->stypes= NR_TYPES; + info->nvars= sizeof(varstr)/sizeof(VarStruct); + + info->snames= stnames[0]; + info->result= result; + info->cfra= &cfra; + info->varstr= varstr; + + info->init= plugin_init; + info->tex_doit= (TexDoit) plugin_tex_doit; + info->callback= plugin_but_changed; +} + +/* ************************************************************ + Tiles + + Demonstration of a simple square wave function sampled + with anti-aliasing. + It is not mipmapped yet... + + ************************************************************ */ + + +/* square wave, antialiased, no mipmap! */ + +float sample_wave(float freq, float coord, float pixsize) +{ + float fac, frac, retval; + int part1, part2; + + if(pixsize > freq) return 0.5; + + pixsize/= freq; + + fac= coord/freq; + part1= ffloor(fac); + frac= fac - part1; + + if(part1 & 1) retval= 0.0; + else retval= 1.0; + + if(pixsize != 0.0) { + + /* is coord+pixsize another value? */ + + part2= ffloor(fac + pixsize); + if(part1==part2) return retval; + + /* antialias */ + if(retval==1.0) retval= (1.0-frac)/pixsize; + else retval= 1.0-(1.0-frac)/pixsize; + } + return retval; +} + +/* return 0: One channel texture + return 1: RGB texture + return 2: Normals texture */ + + +int plugin_tex_doit(int stype, Cast *cast, float *texvec, float *dxt, float *dyt) +{ + float xwave, ywave; + + if(stype==1) { + texvec[0]+= hnoise(cast->noise, texvec[0], texvec[1], texvec[2]); + texvec[1]+= hnoise(cast->noise, texvec[1], texvec[2], texvec[0]); + } + + if(dxt && dyt) { + xwave= sample_wave(cast->size, texvec[0], fabs(dxt[0]) + fabs(dyt[0]) ); + ywave= sample_wave(cast->size, texvec[1], fabs(dxt[1]) + fabs(dyt[1]) ); + + if(xwave > ywave) result[0]= xwave-ywave; + else result[0]= ywave-xwave; + } + else { + xwave= sample_wave(cast->size, texvec[0], 0.0 ); + ywave= sample_wave(cast->size, texvec[1], 0.0 ); + + if(xwave > ywave) result[0]= xwave-ywave; + else result[0]= ywave-xwave; + } + + return 0; +} |