GU_ElementGroup.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:        GU Library (C++)
 *
 * COMMENTS:
 *
 */

#ifndef __GU_ElementGroup_h__
#define __GU_ElementGroup_h__

#include "GU_Group.h"

class GU_Detail;
class GA_ElementGroup;
class GA_Group;

class GU_API GU_ElementGroup : public GU_Group
{
public:
    GU_ElementGroup(GU_Detail *gdp);
    ~GU_ElementGroup() override;
    
    // Select items based on a boolean operation done between one or two
    // different groups (e.g. intersect, union, subtraction, negation).
    // Returns false if any error was encountered and true otherwise.
    bool                 boolean(GU_GroupBoolOp boolop, 
                                 const UT_String &group1, bool negate1,
                                 const UT_String &group2, bool negate2
                                 ) const override;

    bool                 boolean(GU_GroupBoolOp boolop, 
                                 GA_Group *group1, bool negate1,
                                 GA_Group *group2, bool negate2
                                 ) const override;

    GA_ElementGroup     * elementGroup() const;

protected:
    /// Determines whether threading should be enabled, based on the size of
    /// the range being processed and whether the group is unordered.
    /// If threading is enabled, calls grp.invalidateGroupEntries() since
    /// elements will be toggled in parallel.
    static bool enableThreadedWrites(GA_ElementGroup &grp, exint range_entries);
};

#endif