floor.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 STARK_RESOURCES_FLOOR_H
#define STARK_RESOURCES_FLOOR_H

#include "common/array.h"
#include "common/str.h"

#include "math/line3d.h"
#include "math/ray.h"
#include "math/vector3d.h"

#include "engines/stark/resources/object.h"

namespace Stark {

namespace Formats {
class XRCReadStream;
}

namespace Resources {

class Floor;
class FloorFace;
class FloorField;

class FloorEdge {
public:
    FloorEdge(uint16 vertexIndex1, uint16 vertexIndex2, uint32 faceIndex1);

    void buildNeighbours(const Floor *floor);

    void computeMiddle(const Floor *floor);

    void setOtherFace(uint32 faceIndex);

    bool hasVertices(uint16 vertexIndex1, uint16 vertexIndex2) const;

    Common::Array<FloorEdge *> getNeighbours() const;

    float costTo(const FloorEdge *other) const;

    Math::Vector3d getPosition() const;

    bool isFloorBorder() const;

    bool intersectsSegment(const Floor *floor, const Math::Line3d &segment) const;

    int32 getFaceIndex1() const;
    int32 getFaceIndex2() const;

    void enable(bool enable);

    bool isEnabled() const;

    void saveLoad(ResourceSerializer *serializer);

private:
    void addNeighboursFromFace(const FloorFace *face);
    static bool intersectLine2d(const Math::Line3d &s1, const Math::Line3d &s2);

    uint16 _vertexIndex1;
    uint16 _vertexIndex2;
    Math::Vector3d _middle;
    int32 _faceIndex1;
    int32 _faceIndex2;

    bool _enabled;

    Common::Array<FloorEdge *> _neighbours;
};

class Floor : public Object {
public:
    static const Type::ResourceType TYPE = Type::kFloor;

    Floor(Object *parent, byte subType, uint16 index, const Common::String &name);
    virtual ~Floor();

    // Resource API
    void onAllLoaded() override;
    void saveLoad(ResourceSerializer *serializer) override;

    Math::Vector3d getVertex(uint32 index) const;

    int32 findFaceContainingPoint(const Math::Vector3d &point) const;

    void computePointHeightInFace(Math::Vector3d &point, uint32 faceIndex) const;

    int32 findFaceHitByRay(const Math::Ray &ray, Math::Vector3d &intersection) const;

    int32 findFaceClosestToRay(const Math::Ray &ray, Math::Vector3d &center) const;

    float getDistanceFromCamera(uint32 faceIndex) const;

    FloorFace *getFace(uint32 index) const;

    bool isSegmentInside(const Math::Line3d &segment) const;

    void enableFloorField(FloorField *floorfield, bool enable);

protected:
    void readData(Formats::XRCReadStream *stream) override;
    void printData() override;

    void buildEdgeList();
    void addFaceEdgeToList(uint32 faceIndex, uint32 index1, uint32 index2);

    uint32 _facesCount;
    Common::Array<Math::Vector3d> _vertices;
    Common::Array<FloorFace *> _faces;
    Common::Array<FloorEdge> _edges;
};

} // End of namespace Resources
} // End of namespace Stark

#endif // STARK_RESOURCES_FLOOR_H