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engines/stark/model/animhandler.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 STARK_MODEL_ANIM_HANDLER_H
+#define STARK_MODEL_ANIM_HANDLER_H
+
+#include "common/scummsys.h"
+
+namespace Stark {
+
+class Model;
+class BoneNode;
+class SkeletonAnim;
+
+/**
+ * Animate a skeletal model's bones according to an animation
+ */
+class AnimHandler {
+public:
+	AnimHandler();
+	~AnimHandler();
+
+	/**
+	 * Increment the animation timestamp, and apply bone animations if required
+	 */
+	void animate(uint32 time);
+
+	/** Set the skeletal model to animate */
+	void setModel(Model *model);
+
+	/** Set the skeletal animation to use */
+	void setAnim(SkeletonAnim *anim);
+
+	/** Stop blending and forget about the previous animation */
+	void resetBlending();
+
+private:
+	void enactCandidate();
+	void startBlending();
+	void updateBlending(int32 deltaTime);
+	void stopBlending();
+
+	void setNode(uint32 time, BoneNode *bone, const BoneNode *parent);
+
+	static const uint32 _blendDuration = 300; // ms
+
+	SkeletonAnim *_anim;
+	int32 _animTime;
+
+	int32 _framesBeforeCandidateReady;
+	SkeletonAnim *_candidateAnim;
+	int32 _candidateAnimTime;
+
+	SkeletonAnim *_blendAnim;
+	int32 _blendAnimTime;
+	int32 _blendTimeRemaining;
+
+	Model *_model;
+};
+
+} // End of namespace Stark
+
+#endif // STARK_MODEL_ANIM_HANDLER_H