Ton Roosendaal
f45546a1d3
After a couple of experiments with variable blur filters, I tried a more interesting, and who knows... original approach. :) First watch results here: http://www.blender.org/bf/rt0001_0030.avi http://www.blender.org/bf/hand0001_0060.avi These are the steps in producing such results: - In preprocess, the speed vectors to previous and next frame are calculated. Speed vectors are screen-aligned and in pixel size. - while rendering, these vectors get calculated per sample, and accumulated in the vector buffer checking for "minimum speed". (on start the vector buffer is initialized on max speed). - After render: - The entire image, all pixels, then is converted to quad polygons. - Also the z value of the pixels is assigned to the polygons - The vertices for the quads use averaged speed vectors (of the 4 corner faces), using a 'minimum but non-zero' speed rule. This minimal speed trick works very well to prevent 'tearing' apart when multiple faces move in different directions in a pixel, or to be able to separate moving pixels clearly from non-moving ones - So, now we have a sort of 'mask' of quad polygons. The previous steps guaranteed that this mask doesn't have antialias color info, and has speed vectors that ensure individual parts to move nicely without tearing effects. The Z allows multiple layers of moving masks. - Then, in temporal buffer, faces get tagged if they move or not - These tags then go to an anti-alias routine, which assigns alpha values to edge faces, based on the method we used in past to antialias bitmaps (still in our code, check the antialias.c in imbuf!) - finally, the tag buffer is used to tag which z values of the original image have to be included (to allow blur go behind stuff). - OK, now we're ready for accumulating! In a loop, all faces then get drawn (with zbuffer) with increasing influence of their speed vectors. The resulting image then is accumulated on top of the original with a decreasing weighting value. It sounds all quite complex... but the speed is still encouraging. Above images have 64 mblur steps, which takes about 1-3 seconds per frame. Usage notes: - Make sure the render-layer has passes 'Vector' and 'Z' on. - add in Compositor the VectorBlur node, and connect the image, Z and speed to the inputs. - The node allows to set amount of steps (10 steps = 10 forward, 10 back). and to set a maximum speed in pixels... to prevent extreme moving things to blur too wide.
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/**
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* $Id$
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*
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2006 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 LICENSE BLOCK *****
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*/
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#ifndef RENDERDATABASE_H
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#define RENDERDATABASE_H
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struct Object;
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struct VlakRen;
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struct VertRen;
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struct HaloRen;
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struct Material;
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struct Render;
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/* render allocates totvert/256 of these nodes, for lookup and quick alloc */
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typedef struct VertTableNode {
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struct VertRen *vert;
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float *rad;
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float *sticky;
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float *strand;
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float *tangent;
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float *stress;
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float *winspeed;
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} VertTableNode;
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/* renderdatabase.c */
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void free_renderdata_tables(struct Render *re);
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void free_renderdata_vertnodes(struct VertTableNode *vertnodes);
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void set_normalflags(Render *re);
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void project_renderdata(struct Render *re, void (*projectfunc)(float *, float mat[][4], float *), int do_pano, int part);
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/* functions are not exported... so wrong names */
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struct VlakRen *RE_findOrAddVlak(struct Render *re, int nr);
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struct VertRen *RE_findOrAddVert(struct Render *re, int nr);
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struct HaloRen *RE_findOrAddHalo(struct Render *re, int nr);
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struct HaloRen *RE_inithalo(struct Render *re, struct Material *ma, float *vec, float *vec1, float *orco, float hasize,
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float vectsize, int seed);
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void RE_addRenderObject(struct Render *re, struct Object *ob, struct Object *par, int index, int sve, int eve, int sfa, int efa);
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float *RE_vertren_get_sticky(struct Render *re, struct VertRen *ver, int verify);
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float *RE_vertren_get_stress(struct Render *re, struct VertRen *ver, int verify);
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float *RE_vertren_get_rad(struct Render *re, struct VertRen *ver, int verify);
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float *RE_vertren_get_strand(struct Render *re, struct VertRen *ver, int verify);
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float *RE_vertren_get_tangent(struct Render *re, struct VertRen *ver, int verify);
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float *RE_vertren_get_winspeed(struct Render *re, struct VertRen *ver, int verify);
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/* haloren->type: flags */
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#define HA_ONLYSKY 1
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#define HA_VECT 2
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#define HA_XALPHA 4
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#define HA_FLARECIRC 8
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/* convertblender.c */
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void init_render_world(Render *re);
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void RE_Database_FromScene_Vectors(Render *re, struct Scene *sce);
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#endif /* RENDERDATABASE_H */
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