GT_PrimCamera.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:        GT_PrimCamera.h ( GT Library, C++)
 *
 * COMMENTS:
 */

#ifndef __GT_PrimCamera__
#define __GT_PrimCamera__

#include "GT_API.h"
#include "GT_Primitive.h"
#include "GT_GEOPrimCollect.h"
#include "GT_Transform.h"

#include <UT/UT_CameraParms.h>

/// @brief A Camera Primitive
/// @endcode
class GT_API GT_PrimCamera : public GT_Primitive
{
public:
    /// Default constructor
    GT_PrimCamera(const UT_Matrix4D &transform,
                  const UT_CameraParms &settings,
                  const GT_AttributeListHandle &attribs);
    /// Destructor
    ~GT_PrimCamera() override;

    const char         *className() const override { return "GT_PrimCamera"; }

    GT_PrimitiveHandle  doSoftCopy() const override
                                    { return new GT_PrimCamera(*this); }
    
    GT_PrimitiveHandle  doHarden() const override;
    
    bool refine(GT_Refine &refiner, const GT_RefineParms *parms) const override;
    
    /// @{
    /// Methods defined on GT_Primitive
    void                enlargeBounds(UT_BoundingBox boxes[],
                                      int nsegments) const override;
    int                 getMotionSegments() const override;
    int64               getMemoryUsage() const override;
    /// @}
    
    /// @{
    /// Methods defined on GT_Primitive
    int                 getPrimitiveType() const override
                            { return GT_PRIM_CAMERA; }
    /// @}

    const GT_AttributeListHandle        &getUniformAttributes() const override
                                            { return myAttribs; }
        
    bool                updateGeoPrim(const GU_ConstDetailHandle &dtl,
                                      const GT_RefineParms &refine) override;
    
    const UT_CameraParms &getParms() const { return mySettings; }

protected:

private:

    void buildPerspectiveFrustum(GU_Detail *gdp) const;
    
    void buildOrthoFrustum(GU_Detail *gdp) const;
    
    UT_CameraParms mySettings;
    GT_AttributeListHandle myAttribs;
};

#endif