BCSTM-Player |

external/tween-engine/include/TweenEngine/TweenEquation.h

@@ -0,0 +1,46 @@
+//
+//  TweenEquation.h
+//
+//  This code is derived from Universal Tween Engine
+//  Licensed under Apache License 2.0 - http://www.apache.org/licenses/LICENSE-2.0
+//
+
+/**
+ * Base class for every easing equation. You can create your own equations
+ * and directly use them in the Tween engine by inheriting from this class.
+ *
+ * @see Tween
+ * @author Aurelien Ribon | http://www.aurelienribon.com/
+ */
+
+#ifndef __TweenEquation__
+#define __TweenEquation__
+
+//#include <string.h>
+
+namespace TweenEngine
+{
+    class TweenEquation
+    {
+    public:
+        /**
+         * Computes the next value of the interpolation.
+         *
+         * @param t The current time, between 0 and 1.
+         * @return The current value.
+         */
+        virtual float compute(float t) = 0;
+
+        virtual const char *toString() = 0;
+
+        /**
+         * Returns true if the given string is the name of this equation (the name
+         * is returned in the toString() method, don't forget to override it).
+         * This method is usually used to save/load a tween to/from a text file.
+         */
+        //bool isValueOf(const char *str) { return !strcmp(str, toString()); };
+        
+    };
+}
+
+#endif /* defined(__TweenEquation__) */