blender/source/gameengine/Rasterizer/RAS_MeshObject.h

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
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*
* 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.
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*
* 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,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
* 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 LICENSE BLOCK *****
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*/
/** \file RAS_MeshObject.h
* \ingroup bgerast
*/
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#ifndef __RAS_MESHOBJECT
#define __RAS_MESHOBJECT
#if defined(WIN32) && !defined(FREE_WINDOWS)
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// disable the STL warnings ("debug information length > 255")
#pragma warning (disable:4786)
#endif
#include <vector>
#include <set>
#include <list>
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#include "RAS_Polygon.h"
#include "RAS_MaterialBucket.h"
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#include "MT_Transform.h"
#include "CTR_HashedPtr.h"
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struct Mesh;
class RAS_Deformer;
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/* RAS_MeshObject is a mesh used for rendering. It stores polygons,
* but the actual vertices and index arrays are stored in material
* buckets, referenced by the list of RAS_MeshMaterials. */
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class RAS_MeshObject
{
private:
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unsigned int m_debugcolor;
bool m_bModified;
bool m_bMeshModified;
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STR_String m_name;
static STR_String s_emptyname;
vector<class RAS_Polygon*> m_Polygons;
/* polygon sorting */
struct polygonSlot;
struct backtofront;
struct fronttoback;
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protected:
vector<int> m_cacheWeightIndex;
list<RAS_MeshMaterial> m_materials;
Mesh* m_mesh;
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public:
// for now, meshes need to be in a certain layer (to avoid sorting on lights in realtime)
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RAS_MeshObject(Mesh* mesh);
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virtual ~RAS_MeshObject();
// for shape keys,
void CheckWeightCache(struct Object* obj);
/* materials */
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int NumMaterials();
const STR_String& GetMaterialName(unsigned int matid);
const STR_String& GetTextureName(unsigned int matid);
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RAS_MeshMaterial* GetMeshMaterial(unsigned int matid);
RAS_MeshMaterial* GetMeshMaterial(RAS_IPolyMaterial *mat);
BGE: Support mesh modifiers in the game engine. Realtime modifiers applied on mesh objects will be supported in the game engine with the following limitations: - Only real time modifiers are supported (basically all of them!) - Virtual modifiers resulting from parenting are not supported: armature, curve, lattice. You can still use these modifiers (armature is really not recommended) but in non parent mode. The BGE has it's own parenting capability for armature. - Modifiers are computed on the host (using blender modifier stack). - Modifiers are statically evaluated: any possible time dependency in the modifiers is not supported (don't know enough about modifiers to be more specific). - Modifiers are reevaluated if the underlying mesh is deformed due to shape action or armature action. Beware that this is very CPU intensive; modifiers should really be used for static objects only. - Physics is still based on the original mesh: if you have a mirror modifier, the physic shape will be limited to one half of the resulting object. Therefore, the modifiers should preferably be used on graphic objects. - Scripts have no access to the modified mesh. - Modifiers that are based on objects interaction (boolean,..) will not be dependent on the objects position in the GE. What you see in the 3D view is what you get in the GE regardless on the object position, velocity, etc. Besides that, the feature is compatible with all the BGE features that affect meshes: armature action, shape action, relace mesh, VideoTexture, add object, dupligroup. Known problems: - This feature is a bit hacky: the BGE uses the derived mesh draw functions to display the object. This drawing method is a bit slow and is not 100% compatible with the BGE. There may be some problems in multi-texture mode: the multi-texture coordinates are not sent to the GPU. Texface and GLSL on the other hand should be fully supported. - Culling is still based on the extend of the original mesh. If you have a modifer that extends the size of the mesh, the object may disappear while still in the view frustrum. - Derived mesh is not shared between replicas. The derived mesh is allocated and computed for each object with modifiers, regardless if they are static replicas. - Display list are not created on objects with modifiers. I should be able to fix the above problems before release. However, the feature is already useful for game development. Once you are ready to release the game, you can apply the modifiers to get back display list support and mesh sharing capability. MSVC, scons, Cmake, makefile updated. Enjoy /benoit
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int GetMaterialId(RAS_IPolyMaterial *mat);
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list<RAS_MeshMaterial>::iterator GetFirstMaterial();
list<RAS_MeshMaterial>::iterator GetLastMaterial();
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//unsigned int GetLightLayer();
/* name */
BGE performance, 4th round: logic This commit extends the technique of dynamic linked list to the logic system to eliminate as much as possible temporaries, map lookup or full scan. The logic engine is now free of memory allocation, which is an important stability factor. The overhead of the logic system is reduced by a factor between 3 and 6 depending on the logic setup. This is the speed-up you can expect on a logic setup using simple bricks. Heavy bricks like python controllers and ray sensors will still take about the same time to execute so the speed up will be less important. The core of the logic engine has been much reworked but the functionality is still the same except for one thing: the priority system on the execution of controllers. The exact same remark applies to actuators but I'll explain for controllers only: Previously, it was possible, with the "executePriority" attribute to set a controller to run before any other controllers in the game. Other than that, the sequential execution of controllers, as defined in Blender was guaranteed by default. With the new system, the sequential execution of controllers is still guaranteed but only within the controllers of one object. the user can no longer set a controller to run before any other controllers in the game. The "executePriority" attribute controls the execution of controllers within one object. The priority is a small number starting from 0 for the first controller and incrementing for each controller. If this missing feature is a must, a special method can be implemented to set a controller to run before all other controllers. Other improvements: - Systematic use of reference in parameter passing to avoid unnecessary data copy - Use pre increment in iterator instead of post increment to avoid temporary allocation - Use const char* instead of STR_String whenever possible to avoid temporary allocation - Fix reference counting bugs (memory leak) - Fix a crash in certain cases of state switching and object deletion - Minor speed up in property sensor - Removal of objects during the game is a lot faster
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void SetName(const char *name);
STR_String& GetName();
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/* modification state */
bool MeshModified();
void SetMeshModified(bool v){m_bMeshModified = v;}
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/* original blender mesh */
Mesh* GetMesh() { return m_mesh; }
/* mesh construction */
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virtual RAS_Polygon* AddPolygon(RAS_MaterialBucket *bucket, int numverts);
virtual void AddVertex(RAS_Polygon *poly, int i,
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const MT_Point3& xyz,
const MT_Point2& uv,
const MT_Point2& uv2,
const MT_Vector4& tangent,
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const unsigned int rgbacolor,
const MT_Vector3& normal,
Merge of apricot branch game engine changes into trunk, excluding GLSL. GLEW ==== Added the GLEW opengl extension library into extern/, always compiled into Blender now. This is much nicer than doing this kind of extension management manually, and will be used in the game engine, for GLSL, and other opengl extensions. * According to the GLEW website it works on Windows, Linux, Mac OS X, FreeBSD, Irix, and Solaris. There might still be platform specific issues due to this commit, so let me know and I'll look into it. * This means also that all extensions will now always be compiled in, regardless of the glext.h on the platform where compilation happens. Game Engine =========== Refactoring of the use of opengl extensions and other drawing code in the game engine, and cleaning up some hacks related to GLSL integration. These changes will be merged into trunk too after this. The game engine graphics demos & apricot level survived my tests, but this could use some good testing of course. For users: please test with the options "Generate Display Lists" and "Vertex Arrays" enabled, these should be the fastest and are supposed to be "unreliable", but if that's the case that's probably due to bugs that can be fixed. * The game engine now also uses GLEW for extensions, replacing the custom opengl extensions code that was there. Removes a lot of #ifdef's, but the runtime checks stay of course. * Removed the WITHOUT_GLEXT environment variable. This was added to work around a specific bug and only disabled multitexturing anyway. It might also have caused a slowdown since it was retrieving the environment variable for every vertex in immediate mode (bug #13680). * Refactored the code to allow drawing skinned meshes with vertex arrays too, removing some specific immediate mode drawing functions for this that only did extra normal calculation. Now it always splits vertices of flat faces instead. * Refactored normal recalculation with some minor optimizations, required for the above change. * Removed some outdated code behind the __NLA_OLDDEFORM #ifdef. * Fixed various bugs in setting of multitexture coordinates and vertex attributes for vertex arrays. These were not being enabled/disabled correct according to the opengl spec, leading to crashes. Also tangent attributes used an immediate mode call for vertex arrays, which can't work. * Fixed use of uninitialized variable in RAS_TexVert. * Exporting skinned meshes was doing O(n^2) lookups for vertices and deform weights, now uses same trick as regular meshes.
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bool flat,
int origindex);
void SchedulePolygons(int drawingmode);
/* vertex and polygon acces */
int NumVertices(RAS_IPolyMaterial* mat);
RAS_TexVert* GetVertex(unsigned int matid, unsigned int index);
const float* GetVertexLocation(unsigned int orig_index);
int NumPolygons();
RAS_Polygon* GetPolygon(int num) const;
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/* buckets */
virtual void AddMeshUser(void *clientobj, SG_QList *head, RAS_Deformer* deformer);
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void RemoveFromBuckets(void *clientobj);
void EndConversion() {
#if 0
m_sharedvertex_map.clear(); // SharedVertex
vector<vector<SharedVertex> > shared_null(0);
shared_null.swap( m_sharedvertex_map ); /* really free the memory */
#endif
}
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/* colors */
void DebugColor(unsigned int abgr);
void SetVertexColor(RAS_IPolyMaterial* mat,MT_Vector4 rgba);
/* polygon sorting by Z for alpha */
void SortPolygons(RAS_MeshSlot& ms, const MT_Transform &transform);
bool HasColliderPolygon() {
int numpolys= NumPolygons();
for (int p=0; p<numpolys; p++)
if (m_Polygons[p]->IsCollider())
return true;
return false;
}
/* for construction to find shared vertices */
struct SharedVertex {
RAS_DisplayArray *m_darray;
int m_offset;
};
vector<vector<SharedVertex> > m_sharedvertex_map;
#ifdef WITH_CXX_GUARDEDALLOC
public:
void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:RAS_MeshObject"); }
void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
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};
#endif //__RAS_MESHOBJECT