Antonis Ryakiotakis
016e75ad64
Two fixes here (only the second one is strictly needed to fix the issue, but both make the system better). First is introduction of a random generator array for use with threaded systems where each thread needs to access its own number generator. The random texture now uses this so it should not be influenced by other random generator reseedings of the main random generator like it did before. Second, I reshuffled the texture code to resample the upper bits of the random number first. According to Numerical Recipes, this is where the most variance can be found, so by sampling those we avoid correlation issues. Also, multiplying here is not ideal because if a pair of bits are zero, then the whole result will also be zero. Overall this is much more random (tm) than before, however result will also be brighter, since we now have less black spots. Tweaking the brightness/contrast should somewhat fix that, generally having the same result as before is not possible anyway if we are to really fix this. Also, seems like exposing procedural depth might be nice here since it influences the precision of the texture lookup.
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
/*
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* ***** BEGIN GPL 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.
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2006 by Blender Foundation
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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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/** \file RE_render_ext.h
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* \ingroup render
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*/
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#ifndef __RE_RENDER_EXT_H__
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#define __RE_RENDER_EXT_H__
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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/* this include is for non-render pipeline exports (still old cruft here) */
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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/* called by meshtools */
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struct DerivedMesh;
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struct ImagePool;
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struct LinkNode;
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struct MTex;
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struct Scene;
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struct View3D;
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/* particle.c, effect.c, editmesh_modes.c and brush.c, returns 1 if rgb, 0 otherwise */
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int externtex(struct MTex *mtex, const float vec[3], float *tin, float *tr, float *tg, float *tb, float *ta, const int thread, struct ImagePool *pool);
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/* particle.c */
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void texture_rgb_blend(float in[3], const float tex[3], const float out[3], float fact, float facg, int blendtype);
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float texture_value_blend(float tex, float out, float fact, float facg, int blendtype);
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/* node_composite.c */
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void ibuf_sample(struct ImBuf *ibuf, float fx, float fy, float dx, float dy, float result[4]);
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void antialias_tagbuf(int xsize, int ysize, char *rectmove);
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/* dynamicpaint.c */
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struct Material *RE_init_sample_material(struct Material *orig_mat, struct Scene *scene);
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void RE_free_sample_material(struct Material *mat);
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void RE_sample_material_color(struct Material *mat, float color[3], float *alpha, const float volume_co[3], const float surface_co[3],
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int face_index, short hit_quad, struct DerivedMesh *orcoDm, struct Object *ob);
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void RE_init_texture_rng(void);
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void RE_exit_texture_rng(void);
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#endif /* __RE_RENDER_EXT_H__ */
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