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engines/tetraedge/te/te_curve_anim2.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 TETRAEDGE_TE_TE_CURVE_ANIM2_H
+#define TETRAEDGE_TE_TE_CURVE_ANIM2_H
+
+#include "tetraedge/te/te_animation.h"
+#include "tetraedge/te/te_interpolation.h"
+
+namespace Tetraedge {
+
+template<class T> static T linearInterpolation(T &obj1, T &obj2, double amount) {
+	amount = CLIP<double>(amount, 0.0, 1.0);
+	return (obj1 * (1.0 - amount)) + (obj2 * amount);
+}
+
+template<class T, class S>
+class TeCurveAnim2 : public TeAnimation {
+public:
+	typedef void(T::*TMethod)(const S &);
+
+	TeCurveAnim2() : _callbackObj(nullptr), _callbackMethod(nullptr), _duration(0), _lastUpdateTime(0) {}
+	virtual ~TeCurveAnim2() {}
+
+	void setCurve(const Common::Array<float> &curve) {
+		// The original writes the curve to a stream to load it back in in
+		// the interpolation.. we just skip that with a direct array copy.
+		_interp.load(curve);
+	}
+
+	void update(double millis) {
+		_lastUpdateTime = millis;
+
+		double amount = _interp.interpole(millis, _duration);
+
+		const S interpVal = linearInterpolation<S>(_startVal, _endVal, amount);
+		//debug("CurveAnim %.02f/%.02f (%.02f) -> %s", time, _maxTime, amount, interpVal.toString().c_str());
+		(_callbackObj->*_callbackMethod)(interpVal);
+		if (_lastUpdateTime >= _duration) {
+			if (_repeatCount == -1) {
+				seekToStart();
+			} else {
+				stop();
+				onFinished().call();
+			}
+		}
+	}
+
+	S _startVal;
+	S _endVal;
+	T *_callbackObj;
+	TMethod _callbackMethod;
+	double _duration;
+
+private:
+	TeInterpolation _interp;
+	double _lastUpdateTime;
+};
+
+} // end namespace Tetraedge
+
+#endif // TETRAEDGE_TE_TE_CURVE_ANIM2_H