FnGLRotateBallHandle.h

// Copyright (c) 2017 The Foundry Visionmongers Ltd. All Rights Reserved.

#ifndef GLROTATEBALLHANDLE_H_
#define GLROTATEBALLHANDLE_H_

#include <stdint.h>

#include "FnGLTransformManipulator.h"

#include <FnViewer/plugin/FnManipulatorHandle.h>
#include <FnViewer/plugin/FnMathTypes.h>
#include <FnViewer/utils/FnDrawable.h>

using namespace Foundry::Katana::ViewerAPI;
using namespace Foundry::Katana::ViewerUtils;

class GLRotateBallHandle : public GLTransformManipulatorHandle
{
public:
    GLRotateBallHandle();

    virtual ~GLRotateBallHandle();

    static Foundry::Katana::ViewerAPI::ManipulatorHandle* create()
    {
        return new GLRotateBallHandle();
    }

    static void flush(){}

    void draw();

    void pickerDraw(int64_t pickerId);

    void setup();

    Orientation getOrientation();

    FnAttribute::Attribute getOption(
            Foundry::Katana::ViewerAPI::OptionIdGenerator::value_type optionId);

protected:
    virtual std::string getComponentName() { return "rotate?"; }

    bool getDraggingPlane(Vec3d& origin, Vec3d& normal);

    void startDrag(const Vec3d& initialPointOnPlane,
        const Vec2i& initialMousePosition);

    void drag(const Vec3d& initialPointOnPlane,
              const Vec3d& previousPointOnPlane,
              const Vec3d& currentPointOnPlane,
              const Vec2i& initialMousePosition,
              const Vec2i& previousMousePosition,
              const Vec2i& currentMousePosition,
              bool isFinal);

    void applyXformToLocation(const std::string& locationPath,
                              const IMATH_NAMESPACE::M44d& xform,
                              bool isFinal);

private:
    IMATH_NAMESPACE::V3d getDirectionOnHemisphere(
        const IMATH_NAMESPACE::V3d& pointOnPlane);

    Drawable m_mesh;

    IMATH_NAMESPACE::V3d m_normal;

    IMATH_NAMESPACE::V3d m_initialDir;
};

#endif  // GLROTATEBALLHANDLE_H_