gls_geometry_resource_mesh.h

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/*! \file
  \brief  The disti::GlsGeometryResourceMesh class.

  \par Copyright Information

  Copyright (c) 2015 by The DiSTI Corporation.<br>
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  NO WARRANTY. THE SOFTWARE IS PROVIDED "AS-IS," WITHOUT WARRANTY OF ANY KIND,
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*/

#ifndef INCLUDED_GLS_GEOMETRY_RESOURCE_MESH_H
#define INCLUDED_GLS_GEOMETRY_RESOURCE_MESH_H

#include "display.h"
#include "gls_render_effect.h"
#include "gls_geometry_resource.h"
#include "gls_cpp_lang_support.h"
#include <cstddef>

//////////////////// Provides support for creating DLLs ////////////////////////
#if (defined(GLSGEN_EXPORT_GLSADVANCEDMESH) || \
     defined(GLSGEN_IMPORT_GLSADVANCEDMESH) || \
     defined(GLS_EXPORT_GENERATED) || \
     defined(GLS_IMPORT_GENERATED)) \
     && defined(_MSC_VER) 
#  if defined(GLSGEN_EXPORT_GLSADVANCEDMESH) || defined(GLS_EXPORT_GENERATED)
#    define GLSGEN_GlsAdvancedMesh_EXPORT    __declspec(dllexport)
#  else
#    define GLSGEN_GlsAdvancedMesh_EXPORT    __declspec(dllimport)
#  endif
#else
#  define GLSGEN_GlsAdvancedMesh_EXPORT
#endif
///////////////////////////////////////////////////////////////////////////////


namespace disti {

// Forward Declaration
class GlsSortedDrawable;

#ifdef GLES
// Forward Declaration
class GlsGloFileAttribute;
#endif

/** 
    This is an abstrace base class for objects that use a GlsGeometryResource for rendering (e.g. GlsAdvancedMesh)
    This class implements Draw / Pick routines that use a RenderMesh provided by the derived classes.  The appearance of the mesh is affected by the IndexBufferEffectsArray.
    This class also implements Translate, Rotate, and Scale through a GeometryTransform matrix.
*/
class GlsGeometryResourceMesh : public DisplayObject
{
#if !defined(GLES)
    friend class GlsGeometryResourceMesh_SortedDrawable;
#endif

public:
    typedef DisplayObject _BaseClass;
    friend class GlsGeometryResourceMeshEditor;

    /** Create a new GlsGeometryResourceMesh */
    GLSGEN_GlsAdvancedMesh_EXPORT GlsGeometryResourceMesh(void);

    /** Create a copy of a GlsGeometryResourceMesh
      * \param that     The GlsGeometryResourceMesh to copy from
      * \param generateNames    Whether or not to generate a new instance name for the copy
      */
    GLSGEN_GlsAdvancedMesh_EXPORT GlsGeometryResourceMesh( const GlsGeometryResourceMesh& that, const bool generateNames );

    /** GlsGeometryResourceMesh destructor */
    GLSGEN_GlsAdvancedMesh_EXPORT ~GlsGeometryResourceMesh(void);

    //////////////////////////////////////////////////
    // Overridden base class methods
    //////////////////////////////////////////////////

    /* See base class */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void SetAvailableAttributes(unsigned int value);
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void CopyProperties(DisplayObject *src);
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void CopyGeometry(DisplayObject *src);
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void UpdateBoundingVolume(void);

#ifndef GLES
    virtual GLSGEN_GlsAdvancedMesh_EXPORT InterfaceListType* GetCppInterfaceDescription(InterfaceListType* addToThisList= NULL );
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void GetCppInterfaceDescriptionFree(InterfaceListType* array);
#endif

    virtual GLSGEN_GlsAdvancedMesh_EXPORT void PreDraw( const OpenGLMatrices& parentMatrices,Culler &culler );
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void Draw(void);

    virtual GLSGEN_GlsAdvancedMesh_EXPORT void GetTransformedExtents(Vector& min, Vector& max, const GlsMatrixType& matrix, bool resetMinMax = true);
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void GetExtents(float &minx, float &miny, float &minz, float &maxx, float &maxy, float &maxz);

    virtual GLSGEN_GlsAdvancedMesh_EXPORT DisplayObject *Pick3D(const Vector& winLoc, const Vector& logicalCoords, float scale, const Vector& directionVector, Vector &collisionWinLoc, const OpenGLMatrices& drawnMatrices);

    virtual GLSGEN_GlsAdvancedMesh_EXPORT bool Hit(float x,float y,float z,float scale, const Vector& directionVector,Vector *collisionPoint);

    virtual GLSGEN_GlsAdvancedMesh_EXPORT void Scale(float px, float py, float pz, Vertex *anchor, int handleBar = 0);
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void Rotate(const Vector &orig,float angle, const Vector &axis);
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void TranslateVertices(float x, float y, float z);

    /** Override base class since a mesh can have multiple textures.
      * \returns -2 if multiple textures applied to object, -1 if no texture
      *          otherwise if all faces use same texture, returns the texture
      *          index that is shared by the faces. */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT int TextureIndex(void);

    /* Override base class since a mesh can have multiple textures */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void TextureIndex(int index);

    /* Override base class since a mesh can have multiple textures */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT bool SetupTexture(void);

    /** Override base class since a mesh can have multiple materials
      * \returns the first index in the _materialIndices array. */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void MaterialIndex(unsigned int index);

    /* Override base class since a mesh can have multiple materials */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT int MaterialIndex();

    /** \returns the _materialIndices array for this object.
    */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void MaterialIndices(DynamicArray<int> indices);

    /* Override base class since a mesh can have multiple materials */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT DynamicArray<int> & MaterialIndices();

    //////////////////////////////////////////////////
    // GlsGeometryResourceMesh specific operations
    //////////////////////////////////////////////////

    /**
        Set the matrix that is applied before the geometry resource is drawn.
    */
    GLSGEN_GlsAdvancedMesh_EXPORT void SetGeometryTransform(const GlsMatrixType& value);

    /* Set the matrix that is applied before the geometry resource is drawn.
       \param matrix array of 16 doubles that make up the new transform matrix
    */
    GLSGEN_GlsAdvancedMesh_EXPORT void SetGeometryTransform(const double* matrix);

    /**
      * \returns The matrix that is applied before the geometry resource is drawn.
      * Lifetime is guaranteed to coincide with the GlsGeometryResourceMesh's lifetime.
    */
    const GlsMatrixType& GetGeometryTransform() { return _geometryTransform; }

    /**
     * \returns The number of IndexBuffers in the current render mesh
     */
    unsigned int NumIndexBuffers()
    {
        return GetRenderMesh()->NumIndexBuffers();
    }

    /**
     * \returns The size of the IndexBufferEffects array
     */
    unsigned int NumIndexBufferEffects()
    {
        return _indexBufferEffects.Count();
    }

    /**
     * \returns The whether or not the draw order of the mesh can be modified for performance
     */
    bool ReorderAtWill()
    {
        return _reorderAtWill;
    }

    /**
     * Sets whether or not the draw order of the mesh can be modified for performance
     */
    void ReorderAtWill(bool reorderAtWill)
    {
        _reorderAtWill = reorderAtWill;
    }

    

    /**
     * Set the size of the IndexBufferEffects array
     * This will release any effects that are no longer referenced.
     */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void ResizeIndexBufferEffectsArray(unsigned int newSize);

    /** Access the GlsRenderEffect that is used to render the specified index buffer (may be NULL)
     * \param bufferNum The IndexBuffer to get the effect for. Must be between 0 and NumIndexBuffers().
     * \returns Pointer to the index buffer effect used when rendering the specified GlsGeometryResource IndexBuffer 
     */
    GlsRenderEffect* GetIndexBufferEffect(unsigned int bufferNum)
    {
        if (bufferNum >= _indexBufferEffects.Count())
        {
            return NULL;
        }

        return _indexBufferEffects.InternalArray()[bufferNum];
    }

    /** Set the GlsRenderEffect to use when rendering the given index buffer.
     * If this value is NULL, the geometry will be rendered with a default effect.
     * Note: the GlsGeometryResourceMesh will increment the reference count on the new effect and release any effect that was previously referenced.
     * \param bufferNum The IndexBuffer to get the effect for. Should be between 0 and NumIndexBuffers().
     * \param newEffect [out] Pointer to the index buffer effect to use when rendering the specified GlsGeometryResource IndexBuffer.
     */
    void SetIndexBufferEffect(unsigned int bufferNum, GlsRenderEffect* newEffect)
    {
        if (bufferNum >= _indexBufferEffects.Count())
        {
            ResizeIndexBufferEffectsArray(bufferNum+1);
        }
        
        GlsRenderEffect* oldEffect = _indexBufferEffects[bufferNum];
        _indexBufferEffects[bufferNum] = newEffect;

        if (newEffect) { newEffect->AddRef(); }
        if (oldEffect) { oldEffect->Release(); }
    }

    // Returns the mesh that should be rendered / picked
    // Implemented by the derived class
    virtual GlsGeometryResource* GetRenderMesh() = 0;

#ifdef GLES
    /** Set a single attribute from the GLO file.
     * \param data The attribute to set and its associated data.
     */
    virtual GLSGEN_GlsAdvancedMesh_EXPORT void SetFromGloData(GlsGloFileAttribute &data);
#endif

protected:

    GlsMatrixType    _geometryTransform;

    DynamicArray<int> _newMaterialIndices; /** Intermediate data storage to make the setting of new material indices through the Faces simpler. */

    /* Determines whether or not the draw order of this mesh can be modified to increase performance */
    bool _reorderAtWill;

    typedef DynamicArray<GlsRenderEffect*, true> IndexBufferEffectArrayT;
    IndexBufferEffectArrayT _indexBufferEffects;  ///< The effect to use for each index buffer

    class DistiAttributeIndexBufferEffectArray;

#if !defined(GLES)
    typedef DynamicArray<GlsSortedDrawable*, true> SortedDrawableArrayT;
    SortedDrawableArrayT _indexBufferDrawables; ///< GlsSortedDrawable for each index buffer
#endif

    GLSGEN_GlsAdvancedMesh_EXPORT void DrawIndexBuffers(GlsGeometryResource* renderMesh);
    GLSGEN_GlsAdvancedMesh_EXPORT void SetupDefaultEffect();

    GLSGEN_GlsAdvancedMesh_EXPORT void CleanupDefaultEffect();

    GLSGEN_GlsAdvancedMesh_EXPORT void DrawGeometry();

#ifdef GLES
    // Used by SetFromGloData().
    bool SetGloIndexBufferEffect(GlsGloFileAttribute& data);
    GlsGeometry_Generic* LoadGloGeometryResourceData(GlsGloFileAttribute& data);
#endif

private:
      // Cache for the extents to prevent re-calculation when nothing has changed.
      struct LastExtents
      {
          unsigned int  id;
          GlsMatrixType transformMatrix;
          Vector        min;
          Vector        max;

          LastExtents() : id( GlsGeometryResource::s_invalidDataChangedCounter ) {}
      } _lastExtents;

    // Disable implicit generated Members
    GlsGeometryResourceMesh& operator=( const GlsGeometryResourceMesh &rhs ) DISTI_SPECIAL_MEM_FUN_DELETE;
    GlsGeometryResourceMesh( const GlsGeometryResourceMesh &src ) DISTI_SPECIAL_MEM_FUN_DELETE;

    void CopyGeometryInternal( const GlsGeometryResourceMesh& src );
     /* Utility routines used to detect when the material indices has changed */
    void OnMatChanged();
    void OnMatChanged(DynamicArray<int> &a, DynamicArray<int> &b);
    void ReplaceMaterial(unsigned int oldIndex,unsigned int newIndex);
};


/** Used by code generator */
GLSGEN_GlsAdvancedMesh_EXPORT GlsRenderEffect* CreateRenderEffect_DiffNormSpecRefl(
    unsigned int material_index,
    int diffuse_texture_index,
    int normal_texture_index,
    int specular_texture_index,
    int reflection_texture_index,
    float diffuse_amount,
    float normal_amount,
    float specular_amount,
    float reflection_amount,
    bool useVertexColors,
    bool normalFlipGreen,
    float diff_map_offset_v = 0.0f,
    float diff_map_offset_u = 0.0f,
    float diff_map_tiling_u = 1.0f,
    float diff_map_tiling_v = 1.0f,
    float diff_map_angle_w = 0.0f,
    float norm_map_offset_v = 0.0f,
    float norm_map_offset_u = 0.0f,
    float norm_map_tiling_u = 1.0f,
    float norm_map_tiling_v = 1.0f,
    float norm_map_angle_w = 0.0f,
    float spec_map_offset_v = 0.0f,
    float spec_map_offset_u = 0.0f,
    float spec_map_tiling_u = 1.0f,
    float spec_map_tiling_v = 1.0f,
    float spec_map_angle_w = 0.0f
    );

} // namespace disti

#endif