te_camera.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 TETRAEDGE_TE_TE_CAMERA_H
#define TETRAEDGE_TE_TE_CAMERA_H

#include "common/path.h"
#include "common/str.h"
#include "math/ray.h"

#include "tetraedge/te/te_3d_object2.h"
#include "tetraedge/te/te_matrix4x4.h"
#include "tetraedge/te/te_references_counter.h"
#include "tetraedge/te/te_vector2s32.h"
#include "tetraedge/te/te_vector2f32.h"
#include "tetraedge/te/te_vector3f32.h"

namespace Tetraedge {

class TeCamera : public Te3DObject2, public TeReferencesCounter {
public:
    TeCamera();

    void apply();
    void applyProjection();
    void applyTransformations();
    void buildOrthoMatrix();
    void buildPerspectiveMatrix();
    void buildPerspectiveMatrix2();
    void buildPerspectiveMatrix3();
    void draw() override;

    Math::Ray getRay(const TeVector2s32 &pxloc);

    // Syberia 2 redefines loadBin to actually load XML.
    // We just have a separate function.
    void loadXml(const Common::Path &path);

    void orthogonalParams(float f1, float f2, float f3, float f4);
    TeMatrix4x4 projectionMatrix();

    TeVector2f32 projectPoint(const TeVector3f32 &pt);
    TeVector3f32 projectPoint3f32(const TeVector3f32 &pt);

    static void restore();
    TeMatrix4x4 transformationMatrix();
    TeVector3f32 transformCoord(const TeVector3f32 &pt);
    TeVector3f32 transformPoint2Dto3D(const TeVector3f32 &pt);

    void viewport(int x, int y, uint width, uint height);
    TeVector2f32 viewportSize() const { return TeVector2f32(_viewportW, _viewportH); }

    TeSignal0Param &onViewportChangedSignal() { return _onViewportChangedSignal; }

    void setFov(float fov) { _fov = fov; }
    void setOrthoPlanes(float near, float far) {
        _orthFarVal = far;
        _orthNearVal = near;
    }
    void setProjMatrixType(int matrixType) { _projectionMatrixType = matrixType; }
    int projMatrixType() const { return _projectionMatrixType; }
    void setAspectRatio(float val) { _aspectRatio = val; }
    float orthoNearPlane() const { return _orthNearVal; }
    float orthoFarPlane() const { return _orthFarVal; }
    void setOrthoNear(float f) { _orthNearVal = f; }
    void setOrthoFar(float f) { _orthFarVal = f; }
    float getViewportHeight() const { return _viewportH; }
    float getViewportWidth() const { return _viewportW; }

private:
    void updateProjectionMatrix();

    int _projectionMatrixType; // TODO: Should be an enum.
    float _orthNearVal;
    float _orthFarVal;
    float _fov;
    float _aspectRatio;

    int _viewportX;
    int _viewportY;
    uint _viewportW;
    uint _viewportH;

    int _transformA;

    float _orthogonalParamL;
    float _orthogonalParamR;
    float _orthogonalParamT;
    float _orthogonalParamB;

    TeMatrix4x4 _projectionMatrix;

    TeSignal0Param _onViewportChangedSignal;
};

} // end namespace Tetraedge

#endif // TETRAEDGE_TE_TE_CAMERA_H