GteWindow3.h

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// David Eberly, Geometric Tools, Redmond WA 98052
// Copyright (c) 1998-2017
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
// File Version: 3.0.0 (2016/06/19)

#pragma once

#include <GTWindows.h>
#include <Graphics/GteCameraRig.h>
#include <Graphics/GtePVWUpdater.h>
#include <Graphics/GteTrackball.h>

namespace gte
{

class GTE_IMPEXP Window3 : public Window
{
protected:
    // Abstract base class.
    Window3(Parameters& parameters);

public:
    // Create the camera and camera rig.
    void InitializeCamera(float upFovDegrees, float aspectRatio, float dmin, float dmax,
        float translationSpeed, float rotationSpeed, std::array<float, 3> const& pos,
        std::array<float, 3> const& dir, std::array<float, 3> const& up);

    // The camera frustum is modified.  Any subscribers to the pvw-matrix
    // update system of the camera rig must be updated.  No call is made to
    // OnDisplay() or OnIdle().  The base class is unaware of which display
    // method you use, so to have a visual update you must override OnResize
    //    bool MyApplication::OnResize(int xSize, int ySize)
    //    {
    //        if (Window3::OnResize(xSize, ySize))
    //        {
    //            OnIdle();  // or OnDisplay() or MyOwnDrawFunction() ...
    //        }
    //    }
    virtual bool OnResize(int xSize, int ySize) override;

    // The key 't' decreases the translation speed and the 'T' key increases
    // the translation speed.  The 'r' key decreases the rotation speed and
    // the 'R' key increases the rotation speed.
    virtual bool OnCharPress(unsigned char key, int x, int y) override;

    // The appropriate camera rig motion is selected when 'key' is mapped
    // to a camera motion.
    virtual bool OnKeyDown(int key, int x, int y) override;
    virtual bool OnKeyUp(int key, int x, int y) override;

    // Control the rotation of the trackball.
    virtual bool OnMouseClick(MouseButton button, MouseState state,
        int x, int y, unsigned int modifiers) override;

    virtual bool OnMouseMotion(MouseButton button, int x, int y,
        unsigned int modifiers) override;

protected:
    BufferUpdater mUpdater;
    std::shared_ptr<Camera> mCamera;
    CameraRig mCameraRig;
    PVWUpdater mPVWMatrices;
    Trackball mTrackball;
};

}