/******************************************************************************
 * Spine Runtimes License Agreement
 * Last updated April 5, 2025. Replaces all prior versions.
 *
 * Copyright (c) 2013-2025, Esoteric Software LLC
 *
 * Integration of the Spine Runtimes into software or otherwise creating
 * derivative works of the Spine Runtimes is permitted under the terms and
 * conditions of Section 2 of the Spine Editor License Agreement:
 * http://esotericsoftware.com/spine-editor-license
 *
 * Otherwise, it is permitted to integrate the Spine Runtimes into software
 * or otherwise create derivative works of the Spine Runtimes (collectively,
 * "Products"), provided that each user of the Products must obtain their own
 * Spine Editor license and redistribution of the Products in any form must
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 *****************************************************************************/

#ifndef Spine_Interpolation_h
#define Spine_Interpolation_h

#include <spine/SpineObject.h>

namespace spine {
	/// Takes a linear value in the range 0-1 and outputs a usually non-linear, interpolated value.
	class SP_API Interpolation : public SpineObject {
	public:
		virtual ~Interpolation();

		/// @param a Alpha value between 0 and 1.
		virtual float apply(float a);

		float apply(float start, float end, float a);

		static Interpolation &linear();

		/// Aka "smoothstep".
		static Interpolation &smooth();

		/// Slow, then fast.
		static Interpolation &slowFast();

		/// Fast, then slow.
		static Interpolation &fastSlow();

		static Interpolation &circle();
	};
}

#endif /* Spine_Interpolation_h */