omni3d.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef CRYOMNI3D_OMNI3D_H
#define CRYOMNI3D_OMNI3D_H

#include "graphics/surface.h"

namespace CryOmni3D {

class Omni3DManager {
public:
    Omni3DManager() : _vfov(0), _alpha(0), _beta(0), _xSpeed(0), _ySpeed(0), _alphaMin(0), _alphaMax(0),
        _betaMin(0), _betaMax(0), _helperValue(0), _dirty(true), _dirtyCoords(true),
        _sourceSurface(nullptr) {}
    virtual ~Omni3DManager();

    void init(double hfov);

    void setSourceSurface(const Graphics::Surface *surface) { _sourceSurface = surface; _dirty = true; }

    void clearConstraints();
    void setAlphaConstraints(double alphaMin, double alphaMax) { _alphaMin = alphaMin; _alphaMax = alphaMax; }
    void setBetaMinConstraint(double betaMin) { _betaMin = betaMin; }
    void setBetaMaxConstraint(double betaMax) { _betaMax = betaMax; }

    void setAlpha(double alpha) { _alpha = alpha; _dirtyCoords = true; }
    void setBeta(double beta) { _beta = beta; _dirtyCoords = true; }
    void updateCoords(int xDelta, int yDelta, bool useOldSpeed);

    double getAlpha() const { return _alpha; }
    double getBeta() const { return _beta; }

    Common::Point mapMouseCoords(const Common::Point &mouse);

    bool hasSpeed() { return _xSpeed != 0. || _ySpeed != 0.; }
    bool needsUpdate() { return _dirty || _dirtyCoords; }
    const Graphics::Surface *getSurface();

private:
    void updateImageCoords();

    double _vfov;

    double _alpha, _beta;
    double _xSpeed, _ySpeed;

    double _alphaMin, _alphaMax;
    double _betaMin, _betaMax;

    int _imageCoords[2544];
    double _squaresCoords[31][21];
    double _hypothenusesH[31];
    double _anglesH[31];
    double _oppositeV[21];
    double _helperValue;

    bool _dirty;
    bool _dirtyCoords;
    const Graphics::Surface *_sourceSurface;
    Graphics::Surface _surface;
};

} // End of namespace CryOmni3D

#endif