PolygonBody.h

/*
 * Copyright (C) 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef POLYGONBODY_H
#define POLYGONBODY_H

#include <QPolygonF>
#include "Body.h"

class PolygonBody : public Body {
    Q_OBJECT

    Q_PROPERTY(QVariantList vertices READ getVerticesAsVariantList
               WRITE setVerticesFromVariantList NOTIFY verticesChanged)

public:

    explicit PolygonBody(QObject* parent = nullptr);

    const QList<QPointF>& getVertices() const;

    QVariantList getVerticesAsVariantList() const;

    void setVertices(const QList<QPointF>& value);

    void setVerticesFromVariantList(const QVariantList& value);

    const QList<QPolygonF>& getTriangles();

signals:
    void verticesChanged();

protected:
    virtual void forEachShape(const std::function<void(b2Shape*)>& func) override;

private:
    void triangulate();

    QList<QPointF> mVertices = {
        QPointF(-1.0f, -1.0f), QPointF(1.0f, -1.0f), QPointF(1.0f, 1.0f), QPointF(-1.0f, 1.0f) };
    QList<QPolygonF> mTriangles;
    bool mTrianglesDirty = true;

    static const float WELD_TOLERANCE;
};
Q_DECLARE_METATYPE(PolygonBody*)

#endif // POLYGONBODY_H