forked from bartvdbraak/blender
0b0c8c9244
Added a callback instance_init() so that any particular instance of a texture plugin can initialize data. Updated the clouds2 and tile example plugins to have a (dummy) call back.
182 lines
4.2 KiB
C
182 lines
4.2 KiB
C
/**
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* $Id$
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*
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* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version. The Blender
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* Foundation also sells licenses for use in proprietary software under
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* the Blender License. See http://www.blender.org/BL/ for information
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* about this.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL/BL DUAL LICENSE BLOCK *****
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*/
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#include "math.h"
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#include "plugin.h"
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/* ******************** GLOBAL VARIABLES ***************** */
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char name[]= "tiles";
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/* Subtype names must be less than 15 characters */
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#define NR_TYPES 2
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char stnames[NR_TYPES][16]= {"Square", "Deformed"};
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VarStruct varstr[]= {
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NUM|FLO, "size", 1.0, 0.0, 1.0, "The size of each tile",
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NUM|FLO, "Noise", 1.0, 0.01, 10.0, ""
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};
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/* The cast struct is for input in the main doit function
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Varstr and Cast must have the same variables in the same order */
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typedef struct Cast {
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float size;
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float noise;
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} Cast;
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/* result:
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Intensity, R, G, B, Alpha, nor.x, nor.y, nor.z
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*/
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float result[8];
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/* cfra: the current frame */
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float cfra;
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int plugin_tex_doit(int, Cast *, float *, float *, float *);
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void plugin_instance_init(Cast*);
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/* ******************** Fixed functions ***************** */
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int plugin_tex_getversion(void)
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{
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return B_PLUGIN_VERSION;
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}
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void plugin_but_changed(int but)
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{
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}
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void plugin_init(void)
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{
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}
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/*
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* initialize any data for a particular instance of
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* the plugin here
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*/
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void plugin_instance_init(Cast *cast)
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{
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}
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/* this function should not be changed: */
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void plugin_getinfo(PluginInfo *info)
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{
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info->name= name;
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info->stypes= NR_TYPES;
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info->nvars= sizeof(varstr)/sizeof(VarStruct);
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info->snames= stnames[0];
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info->result= result;
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info->cfra= &cfra;
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info->varstr= varstr;
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info->init= plugin_init;
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info->tex_doit= (TexDoit) plugin_tex_doit;
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info->callback= plugin_but_changed;
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info->instance_init= (void (*)(void *)) plugin_instance_init;
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}
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/* ************************************************************
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Tiles
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Demonstration of a simple square wave function sampled
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with anti-aliasing.
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It is not mipmapped yet...
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************************************************************ */
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/* square wave, antialiased, no mipmap! */
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float sample_wave(float freq, float coord, float pixsize)
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{
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float fac, frac, retval;
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int part1, part2;
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if(pixsize > freq) return 0.5;
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pixsize/= freq;
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fac= coord/freq;
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part1= ffloor(fac);
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frac= fac - part1;
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if(part1 & 1) retval= 0.0;
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else retval= 1.0;
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if(pixsize != 0.0) {
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/* is coord+pixsize another value? */
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part2= ffloor(fac + pixsize);
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if(part1==part2) return retval;
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/* antialias */
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if(retval==1.0) retval= (1.0-frac)/pixsize;
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else retval= 1.0-(1.0-frac)/pixsize;
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}
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return retval;
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}
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int plugin_tex_doit(int stype, Cast *cast, float *texvec, float *dxt, float *dyt)
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{
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float xwave, ywave;
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if(stype==1) {
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texvec[0]+= hnoise(cast->noise, texvec[0], texvec[1], texvec[2]);
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texvec[1]+= hnoise(cast->noise, texvec[1], texvec[2], texvec[0]);
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}
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if(dxt && dyt) {
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xwave= sample_wave(cast->size, texvec[0], fabs(dxt[0]) + fabs(dyt[0]) );
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ywave= sample_wave(cast->size, texvec[1], fabs(dxt[1]) + fabs(dyt[1]) );
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if(xwave > ywave) result[0]= xwave-ywave;
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else result[0]= ywave-xwave;
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}
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else {
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xwave= sample_wave(cast->size, texvec[0], 0.0 );
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ywave= sample_wave(cast->size, texvec[1], 0.0 );
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if(xwave > ywave) result[0]= xwave-ywave;
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else result[0]= ywave-xwave;
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}
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return TEX_INT;
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}
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