path.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_PATH_H
#define STARK_RESOURCES_PATH_H

#include "common/rect.h"
#include "math/vector3d.h"
#include "common/str.h"

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

namespace Stark {

namespace Formats {
class XRCReadStream;
}

namespace Resources {

class Path : public Object {
public:
    static const Type::ResourceType TYPE = Type::kPath;

    enum SubType {
        kPath2D = 1,
        kPath3D = 2
    };

    static Object *construct(Object *parent, byte subType, uint16 index, const Common::String &name);

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

    // Resource API
    virtual void readData(Formats::XRCReadStream *stream) override;

    virtual uint getEdgeCount() const = 0;

    virtual Math::Vector3d getEdgeDirection(uint edgeIndex) const;

    virtual float getSortKey() const;

    float getWeightedEdgeLength(uint edgeIndex) const;

    Math::Vector3d getWeightedPositionInEdge(uint edgeIndex, float positionInEdge);

protected:
    void printData() override;
    float getEdgeLength(uint edgeIndex) const;
    virtual float getVertexWeight(uint vertexIndex) const = 0;
    virtual Math::Vector3d getVertexPosition(uint vertexIndex) const = 0;

    uint32 _field_30;

};

class Path2D : public Path {
public:
    Path2D(Object *parent, byte subType, uint16 index, const Common::String &name);
    virtual ~Path2D();

    struct Vertex {
        float weight;
        Common::Point position;
    };

    // Resource API
    void readData(Formats::XRCReadStream *stream) override;

    // Path API
    uint getEdgeCount() const override;

protected:
    float getVertexWeight(uint vertexIndex) const override;
    Math::Vector3d getVertexPosition(uint vertexIndex) const override;

private:
    // Resource API
    void printData() override;

    Common::Array<Vertex> _vertices;
};

class Path3D : public Path {
public:
    Path3D(Object *parent, byte subType, uint16 index, const Common::String &name);
    virtual ~Path3D();

    struct Vertex {
        float weight;
        Math::Vector3d position;
    };

    // Resource API
    void readData(Formats::XRCReadStream *stream) override;

    // Path API
    uint getEdgeCount() const override;
    float getSortKey() const override;
    Math::Vector3d getEdgeDirection(uint edgeIndex) const override;

    Math::Vector3d getVertexPosition3D(uint vertexIndex, int32 *faceIndex);

protected:
    float getVertexWeight(uint vertexIndex) const override;
    Math::Vector3d getVertexPosition(uint vertexIndex) const override;

private:
    // Resource API
    void printData() override;

    Common::Array<Vertex> _vertices;
    float _sortKey;
};

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

#endif // STARK_RESOURCES_PATH_H