Brecht Van Lommel
460dd7a7bb
================= Big commit, but little user visible changes. - Dupliverts and duplifaces are now rendered as instances, instead of storing all of the geometry for each dupli, now an instance is created with a matrix transform refering to the source object. This should allow us to render tree leaves more memory efficient. - Radiosity and to some degree raytracing of such objects is not really efficient still. For radiosity this is fundamentally hard to solve, but raytracing an octree could be created for each object, but the current octree code with it's fixed size doesn't allow this efficiently. - The regression tests survived, but with I expect that some bugs will pop up .. hopefully not too many :). Implementation Notes ==================== - Dupligroups and linked meshes are not rendered as instances yet, since they can in fact be different due to various reasons, instancing of these types of duplis that are the same can be added for them at a later point. - Each ObjectRen now stores it's own database, instead of there being one big databases of faces, verts, .. . Which objects that are actually rendered are defined by the list of ObjectRenInstances, which all refer to an ObjectRen. - Homogeneous coordinatess and clipping is now not stored in vertices anymore, but instead computed on the fly. This couldn't work for instances. That does mean some extra computation has to be done, but memory lookups can be slow too, and this saves some memory. Overall I didn't find a significant speed impact. - OSA rendering for solid and ztransp now is different. Instead of e.g. going 8 times over the databases times and rendering the z-buffer, it now goes over the database once and renders each polygon 8 times. That was necessary to keep instances efficient, and can also give some performance improvement without instances. - There was already instancing support in the yafray export code, now it uses Blender's render instances for export. - UV and color layer storage in the render was a bit messy before, now should be easier to understand. - convertblender.c was reorganized somewhat. Regular render, speedvector and baking now use a single function to create the database, previously there was code duplicated for it. - Some of these changes were done with future multithreading of scene and shadow buffer creation in mind, though especially for scene creation much work remains to be done to make it threadsafe, since it also involves a lot of code from blenkernel, and there is an ugly conflict with the way dupli groups work here .. though in the render code itself it's almost there.
115 lines
3.6 KiB
C++
115 lines
3.6 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) 2007 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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* RE_raytrace.h: ray tracing api, can be used independently from the renderer.
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*/
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#ifndef RE_RAYTRACE_H
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#define RE_RAYTRACE_H
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/* ray types */
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#define RE_RAY_SHADOW 0
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#define RE_RAY_MIRROR 1
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#define RE_RAY_SHADOW_TRA 2
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/* spatial tree for raytracing acceleration */
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typedef void RayTree;
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/* abstraction of face type */
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typedef void RayFace;
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/* object numbers above this are transformed */
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#define RE_RAY_TRANSFORM_OFFS 0x8000000
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/* convert from pointer to index in array and back, with offset if the
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* instance is transformed */
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#define RAY_OBJECT_SET(re, obi) \
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((obi == NULL)? 0: \
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((obi - (re)->objectinstance) + ((obi->flag & R_TRANSFORMED)? RE_RAY_TRANSFORM_OFFS: 0)))
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#define RAY_OBJECT_GET(re, i) \
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((re)->objectinstance + ((i >= RE_RAY_TRANSFORM_OFFS)? i-RE_RAY_TRANSFORM_OFFS: i))
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/* struct for intersection data */
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typedef struct Isect {
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float start[3]; /* start+vec = end, in ray_tree_intersect */
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float vec[3];
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float end[3];
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float labda, u, v; /* distance to hitpoint, uv weights */
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RayFace *face; /* face is where to intersect with */
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int ob;
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RayFace *faceorig; /* start face */
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int oborig;
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RayFace *face_last; /* for shadow optimize, last intersected face */
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int ob_last;
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short isect; /* which half of quad */
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short mode; /* RE_RAYSHADOW, RE_RAYMIRROR, RE_RAYSHADOW_TRA */
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int lay; /* -1 default, set for layer lamps */
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/* only used externally */
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float col[4]; /* RGBA for shadow_tra */
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/* octree only */
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RayFace *facecontr;
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int obcontr;
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float ddalabda;
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short faceisect; /* flag if facecontr was done or not */
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/* custom pointer to be used in the RayCheckFunc */
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void *userdata;
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} Isect;
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/* function callbacks for face type abstraction */
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typedef void (*RayCoordsFunc)(RayFace *face,
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float **v1, float **v2, float **v3, float **v4);
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typedef int (*RayCheckFunc)(Isect *is, RayFace *face);
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typedef float *(*RayObjectTransformFunc)(void *userdata, int ob);
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/* tree building and freeing */
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RayTree *RE_ray_tree_create(int ocres, int totface, float *min, float *max,
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RayCoordsFunc coordfunc, RayCheckFunc checkfunc,
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RayObjectTransformFunc transformfunc, void *userdata);
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void RE_ray_tree_add_face(RayTree *tree, int ob, RayFace *face);
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void RE_ray_tree_done(RayTree *tree);
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void RE_ray_tree_free(RayTree *tree);
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/* intersection with full tree and single face */
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int RE_ray_tree_intersect(RayTree *tree, Isect *is);
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int RE_ray_tree_intersect_check(RayTree *tree, Isect *is, RayCheckFunc check);
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int RE_ray_face_intersection(Isect *is, RayObjectTransformFunc transformfunc,
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RayCoordsFunc coordsfunc);
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/* retrieve the diameter of the tree structure, for setting intersection
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end distance */
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float RE_ray_tree_max_size(RayTree *tree);
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#endif /*__RE_RAYTRACE_H__*/
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