OgreMeshManager.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2012 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/
#ifndef __MeshManager_H__
#define __MeshManager_H__

#include "OgrePrerequisites.h"

#include "OgreResourceManager.h"
#include "OgreSingleton.h"
#include "OgreVector3.h"
#include "OgreHardwareBuffer.h"
#include "OgreMesh.h"
#include "OgrePatchMesh.h"

namespace Ogre {

    class MeshSerializerListener;

    class _OgreExport MeshManager: public ResourceManager, public Singleton<MeshManager>, 
        public ManualResourceLoader
    {
    public:
        MeshManager();
        ~MeshManager();

        void _initialise(void);

        ResourceCreateOrRetrieveResult createOrRetrieve(
            const String& name,
            const String& group,
            bool isManual=false, ManualResourceLoader* loader=0,
            const NameValuePairList* params=0,
            HardwareBuffer::Usage vertexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            HardwareBuffer::Usage indexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            bool vertexBufferShadowed = true, bool indexBufferShadowed = true);

        MeshPtr prepare( const String& filename, const String& groupName,
            HardwareBuffer::Usage vertexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            HardwareBuffer::Usage indexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            bool vertexBufferShadowed = true, bool indexBufferShadowed = true);

        MeshPtr load( const String& filename, const String& groupName,
            HardwareBuffer::Usage vertexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            HardwareBuffer::Usage indexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            bool vertexBufferShadowed = true, bool indexBufferShadowed = true);


        MeshPtr createManual( const String& name, const String& groupName, 
            ManualResourceLoader* loader = 0);

        MeshPtr createPlane(
            const String& name, const String& groupName, const Plane& plane,
            Real width, Real height,
            int xsegments = 1, int ysegments = 1,
            bool normals = true, unsigned short numTexCoordSets = 1,
            Real uTile = 1.0f, Real vTile = 1.0f, const Vector3& upVector = Vector3::UNIT_Y,
            HardwareBuffer::Usage vertexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            HardwareBuffer::Usage indexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY,
            bool vertexShadowBuffer = true, bool indexShadowBuffer = true);

        
        MeshPtr createCurvedIllusionPlane(
            const String& name, const String& groupName, const Plane& plane,
            Real width, Real height, Real curvature,
            int xsegments = 1, int ysegments = 1,
            bool normals = true, unsigned short numTexCoordSets = 1,
            Real uTile = 1.0f, Real vTile = 1.0f, const Vector3& upVector = Vector3::UNIT_Y,
            const Quaternion& orientation = Quaternion::IDENTITY,
            HardwareBuffer::Usage vertexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            HardwareBuffer::Usage indexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY,
            bool vertexShadowBuffer = true, bool indexShadowBuffer = true, 
            int ySegmentsToKeep = -1);

        MeshPtr createCurvedPlane( 
            const String& name, const String& groupName, const Plane& plane, 
            Real width, Real height, Real bow = 0.5f, 
            int xsegments = 1, int ysegments = 1,
            bool normals = false, unsigned short numTexCoordSets = 1, 
            Real xTile = 1.0f, Real yTile = 1.0f, const Vector3& upVector = Vector3::UNIT_Y,
            HardwareBuffer::Usage vertexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            HardwareBuffer::Usage indexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY,
            bool vertexShadowBuffer = true, bool indexShadowBuffer = true);

        PatchMeshPtr createBezierPatch(
            const String& name, const String& groupName, void* controlPointBuffer, 
            VertexDeclaration *declaration, size_t width, size_t height,
            size_t uMaxSubdivisionLevel = PatchSurface::AUTO_LEVEL, 
            size_t vMaxSubdivisionLevel = PatchSurface::AUTO_LEVEL,
            PatchSurface::VisibleSide visibleSide = PatchSurface::VS_FRONT,
            HardwareBuffer::Usage vbUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
            HardwareBuffer::Usage ibUsage = HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY,
            bool vbUseShadow = true, bool ibUseShadow = true);
        
        void setPrepareAllMeshesForShadowVolumes(bool enable);
        bool getPrepareAllMeshesForShadowVolumes(void);

        static MeshManager& getSingleton(void);
        static MeshManager* getSingletonPtr(void);

        Real getBoundsPaddingFactor(void);
    
        void setBoundsPaddingFactor(Real paddingFactor);

        void setListener(MeshSerializerListener *listener);
        
        MeshSerializerListener *getListener();

        void loadResource(Resource* res);

    protected:
        Resource* createImpl(const String& name, ResourceHandle handle, 
            const String& group, bool isManual, ManualResourceLoader* loader, 
            const NameValuePairList* createParams);
        
        void tesselate2DMesh(SubMesh* pSub, unsigned short meshWidth, unsigned short meshHeight, 
            bool doubleSided = false, 
            HardwareBuffer::Usage indexBufferUsage = HardwareBuffer::HBU_STATIC_WRITE_ONLY,
            bool indexSysMem = false);

        void createPrefabPlane(void);
        void createPrefabCube(void);
        void createPrefabSphere(void);
    
        enum MeshBuildType
        {
            MBT_PLANE,
            MBT_CURVED_ILLUSION_PLANE,
            MBT_CURVED_PLANE
        };
        struct MeshBuildParams
        {
            MeshBuildType type;
            Plane plane;
            Real width;
            Real height;
            Real curvature;
            int xsegments;
            int ysegments;
            bool normals;
            unsigned short numTexCoordSets;
            Real xTile;
            Real yTile;
            Vector3 upVector;
            Quaternion orientation;
            HardwareBuffer::Usage vertexBufferUsage;
            HardwareBuffer::Usage indexBufferUsage;
            bool vertexShadowBuffer;
            bool indexShadowBuffer;
            int ySegmentsToKeep;
        };
        typedef map<Resource*, MeshBuildParams>::type MeshBuildParamsMap;
        MeshBuildParamsMap mMeshBuildParams;

        void loadManualPlane(Mesh* pMesh, MeshBuildParams& params);
        void loadManualCurvedPlane(Mesh* pMesh, MeshBuildParams& params);
        void loadManualCurvedIllusionPlane(Mesh* pMesh, MeshBuildParams& params);

        bool mPrepAllMeshesForShadowVolumes;
    
        //the factor by which the bounding box of an entity is padded   
        Real mBoundsPaddingFactor;

        // The listener to pass to serializers
        MeshSerializerListener *mListener;
    };

} //namespace

#endif