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math/line2d.h

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+/* 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 MATH_LINE2D_H
+#define MATH_LINE2D_H
+
+#include "math/vector2d.h"
+
+namespace Math {
+
+class Line2d {
+public:
+	Line2d(const Vector2d &direction, const Vector2d &point);
+
+	Line2d getPerpendicular(const Vector2d &point = Vector2d()) const;
+	Vector2d getDirection() const;
+	float getDistanceTo(const Vector2d &point, Vector2d *intersection) const;
+
+	bool intersectsLine(const Line2d &line, Vector2d *pos) const;
+	bool containsPoint(const Vector2d &point) const;
+
+	friend Common::StreamDebug &operator<<(Common::StreamDebug &dbg, const Line2d &line);
+
+private:
+	float _a, _b, _c;
+};
+
+class Segment2d {
+public:
+	Segment2d();
+	Segment2d(const Vector2d &begin, const Vector2d &end);
+	Segment2d(const Segment2d &other);
+
+	Vector2d begin() const;
+	Vector2d end() const;
+	Vector2d middle() const;
+	Line2d getLine() const;
+	Line2d getPerpendicular(const Vector2d &point = Vector2d()) const;
+
+	bool containsPoint(const Vector2d &point) const;
+
+	bool intersectsLine(const Line2d &line, Vector2d *pos);
+	bool intersectsSegment(const Segment2d &line, Vector2d *pos);
+
+	Segment2d &operator=(const Segment2d &other);
+
+private:
+	Math::Vector2d _begin, _end;
+};
+
+}
+
+#endif
+
+