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engines/qdengine/minigames/adv/qdMath.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 QDENGINE_MINIGAMES_ADV_QDMATH_H
+#define QDENGINE_MINIGAMES_ADV_QDMATH_H
+
+#include "qdengine/xmath.h"
+
+namespace QDEngine {
+
+#define SQRT2 1.41421356f
+#define SQRT3 1.73205081f
+
+inline float dist(const mgVect2f& v1, const mgVect2f& v2) {
+	return sqrt((v1.x - v2.x) * (v1.x - v2.x) + (v1.y - v2.y) * (v1.y - v2.y));
+}
+
+inline float abs(const mgVect2f& v) {
+	return sqrt(v.x * v.x + v.y * v.y);
+}
+
+inline void norm(mgVect2f& v) {
+	float mod = abs(v);
+	if (mod < FLT_EPS) {
+		v = mgVect2f(0, 1);
+		return;
+	}
+	v.x /= mod;
+	v.y /= mod;
+}
+
+template<class T, class T1, class T2>
+inline T clamp(const T& x, const T1& xmin, const T2& xmax) {
+	if (x < xmin) return xmin;
+	if (x > xmax) return xmax;
+	return x;
+}
+
+template<class T>
+inline T abs(const T& x) {
+	if (x < 0) return -x;
+	return x;
+}
+
+} // namespace QDEngine
+
+#endif // QDENGINE_MINIGAMES_ADV_QDMATH_H