GR_MaterialGroups.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        GR_MaterialGroups.h (GR Library, C++)
 *
 * COMMENTS:
 */
#ifndef GR_MaterialGroups_h
#define GR_MaterialGroups_h

#include <GT/GT_Primitive.h>
#include <RE/RE_Types.h>
#include <UT/UT_Array.h>
#include <UT/UT_Map.h>

#include "GR_API.h"
#include "GR_Defines.h"

class GR_MaterialAtlas;


/// A class that manages material assignments to different groups of primitives.
class GR_API GR_MaterialGroups
{
public:
                 GR_MaterialGroups();
                ~GR_MaterialGroups();
    
    int         getNumGroups() const    { return myMatGroups.entries(); }
    bool        isGroupVisible(int i) const
                                        { return myMatGroups(i).visible; }
    GR_MaterialPtr
                getGroupMaterial(int group_index,
                                 const GR_MaterialAtlas &atlas,
                                 int default_material = -1) const;
    int         getGroupMaterialID(int group_index, int default_material) const;
    int         getGroupUnmappedID(int group_index) const
    { return myMatGroups(group_index).mat_id; }

    void        resetGroups()   { myMatGroups.clear(); }
    void        appendGroup(int mat_id)
                                { myMatGroups.append();
                                  myMatGroups.last().mat_id = mat_id; }
    void        setNumGroups(int num)
                                { myMatGroups.entries(num); }
    void        setGroupVisibility(int group_index, bool visible)
                                { myMatGroups(group_index).visible = visible; }
    void        setAllGroupsVisible(bool visible = true);

    void        setGroupMaterial(int group_index, int mat_id)
                                { myMatGroups(group_index).mat_id = mat_id; }

    void        updateMaterialRemap(const GT_PrimitiveHandle &for_prim);

private:
    class gr_MatGroup
    {
    public:
        gr_MatGroup() : visible(true), mat_id(-1) {}

        bool visible;
        int  mat_id;
    };

    UT_Array<gr_MatGroup> myMatGroups;
    UT_Map<int,int>       myMatRemap;
    int64                 myMatRemapDataID;
};

#endif