forked from bartvdbraak/blender
51b4145841
This commit contains a number of performance improvements for the BGE in the Scenegraph (parent relation between objects in the scene) and view frustrum culling. The scenegraph improvement consists in avoiding position update if the object has not moved since last update and the removal of redundant updates and synchronization with the physics engine. The view frustrum culling improvement consists in using the DBVT broadphase facility of Bullet to build a tree of graphical objects in the scene. The elements of the tree are Aabb boxes (Aligned Axis Bounding Boxes) enclosing the objects. This provides good precision in closed and opened scenes. This new culling system is enabled by default but just in case, it can be disabled with a button in the World settings. There is no do_version in this commit but it will be added before the 2.49 release. For now you must manually enable the DBVT culling option in World settings when you open an old file. The above improvements speed up scenegraph and culling up to 5x. However, this performance improvement is only visible when you have hundreds or thousands of objects. The main interest of the DBVT tree is to allow easy occlusion culling and automatic LOD system. This will be the object of further improvements.
240 lines
4.9 KiB
C++
240 lines
4.9 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) 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 LICENSE BLOCK *****
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*/
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#ifndef __SG_SPATIAL_H
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#define __SG_SPATIAL_H
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#include <MT_Vector3.h>
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#include <MT_Point3.h>
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#include <MT_Matrix3x3.h> // or Quaternion later ?
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#include "SG_IObject.h"
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#include "SG_BBox.h"
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class SG_Node;
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class SG_ParentRelation;
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/**
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* SG_Spatial contains spatial information (local & world position, rotation
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* and scaling) for a Scene graph node.
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* It also contains a link to the node's parent.
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*/
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class SG_Spatial : public SG_IObject
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{
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protected:
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MT_Point3 m_localPosition;
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MT_Matrix3x3 m_localRotation;
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MT_Vector3 m_localScaling;
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MT_Point3 m_worldPosition;
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MT_Matrix3x3 m_worldRotation;
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MT_Vector3 m_worldScaling;
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SG_ParentRelation * m_parent_relation;
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SG_BBox m_bbox;
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MT_Scalar m_radius;
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bool m_modified;
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public:
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/**
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* Define the realtionship this node has with it's parent
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* node. You should pass an unshared instance of an SG_ParentRelation
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* allocated on the heap to this method. Ownership of this
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* instance is assumed by this class.
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* You may call this function several times in the lifetime
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* of a node to change the relationship dynamically.
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* You must call this method before the first call to UpdateSpatialData().
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* An assertion willl be fired at run-time in debug if this is not
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* the case.
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* The relation is activated only if no controllers of this object
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* updated the coordinates of the child.
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*/
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void
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SetParentRelation(
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SG_ParentRelation *relation
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);
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SG_ParentRelation *
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GetParentRelation(
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);
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/**
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* Apply a translation relative to the current position.
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* if local then the translation is assumed to be in the
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* local coordinates of this object. If not then the translation
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* is assumed to be in global coordinates. In this case
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* you must provide a pointer to the parent of this object if it
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* exists otherwise if there is no parent set it to NULL
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*/
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void
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RelativeTranslate(
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const MT_Vector3& trans,
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const SG_Spatial *parent,
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bool local
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);
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void
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SetLocalPosition(
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const MT_Point3& trans
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);
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void
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SetWorldPosition(
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const MT_Point3& trans
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);
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void
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RelativeRotate(
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const MT_Matrix3x3& rot,
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bool local
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);
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void
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SetLocalOrientation(
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const MT_Matrix3x3& rot
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);
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void
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SetWorldOrientation(
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const MT_Matrix3x3& rot
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);
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void
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RelativeScale(
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const MT_Vector3& scale
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);
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void
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SetLocalScale(
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const MT_Vector3& scale
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);
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void
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SetWorldScale(
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const MT_Vector3& scale
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);
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const
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MT_Point3&
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GetLocalPosition(
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) const ;
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const
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MT_Matrix3x3&
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GetLocalOrientation(
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) const ;
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const
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MT_Vector3&
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GetLocalScale(
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) const;
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const
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MT_Point3&
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GetWorldPosition(
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) const ;
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const
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MT_Matrix3x3&
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GetWorldOrientation(
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) const ;
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const
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MT_Vector3&
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GetWorldScaling(
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) const ;
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void SetWorldFromLocalTransform();
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MT_Transform GetWorldTransform() const;
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bool ComputeWorldTransforms(const SG_Spatial *parent, bool& parentUpdated);
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/**
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* Bounding box functions.
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*/
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SG_BBox& BBox();
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void SetBBox(SG_BBox & bbox);
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bool inside(const MT_Point3 &point) const;
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void getBBox(MT_Point3 *box) const;
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void getAABBox(MT_Point3 *box) const;
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MT_Scalar Radius() const { return m_radius; }
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void SetRadius(MT_Scalar radius) { m_radius = radius; }
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bool IsModified() { return m_modified; }
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protected:
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friend class SG_Controller;
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friend class KX_BoneParentRelation;
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friend class KX_VertexParentRelation;
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friend class KX_SlowParentRelation;
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friend class KX_NormalParentRelation;
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/**
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* Protected constructor this class is not
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* designed for direct instantiation
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*/
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SG_Spatial(
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void* clientobj,
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void* clientinfo,
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SG_Callbacks callbacks
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);
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SG_Spatial(
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const SG_Spatial& other
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);
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virtual ~SG_Spatial();
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/**
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* Update the world coordinates of this spatial node. This also informs
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* any controllers to update this object.
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*/
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bool
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UpdateSpatialData(
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const SG_Spatial *parent,
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double time,
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bool& parentUpdated
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);
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void SetModified(bool modified) { m_modified = modified; }
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};
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#endif //__SG_SPATIAL_H
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