// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __I_ANIMATED_MESH_SCENE_NODE_H_INCLUDED__
#define __I_ANIMATED_MESH_SCENE_NODE_H_INCLUDED__

#include "ISceneNode.h"
#include "IBoneSceneNode.h"
#include "IAnimatedMesh.h"

namespace irr
{
namespace scene
{
	enum E_JOINT_UPDATE_ON_RENDER
	{
		//! do nothing
		EJUOR_NONE = 0,

		//! get joints positions from the mesh (for attached nodes, etc)
		EJUOR_READ,

		//! control joint positions in the mesh (eg. ragdolls, or set the animation from animateJoints() )
		EJUOR_CONTROL
	};


	class IAnimatedMeshSceneNode;

	//! Callback interface for catching events of ended animations.
	/** Implement this interface and use
	IAnimatedMeshSceneNode::setAnimationEndCallback to be able to
	be notified if an animation playback has ended.
	**/
	class IAnimationEndCallBack : public virtual IReferenceCounted
	{
	public:

		//! Will be called when the animation playback has ended.
		/** See IAnimatedMeshSceneNode::setAnimationEndCallback for
		more information.
		\param node: Node of which the animation has ended. */
		virtual void OnAnimationEnd(IAnimatedMeshSceneNode* node) = 0;
	};

	//! Scene node capable of displaying an animated mesh.
	class IAnimatedMeshSceneNode : public ISceneNode
	{
	public:

		//! Constructor
		IAnimatedMeshSceneNode(ISceneNode* parent, ISceneManager* mgr, s32 id,
			const core::vector3df& position = core::vector3df(0,0,0),
			const core::vector3df& rotation = core::vector3df(0,0,0),
			const core::vector3df& scale = core::vector3df(1.0f, 1.0f, 1.0f))
			: ISceneNode(parent, mgr, id, position, rotation, scale) {}

		//! Destructor
		virtual ~IAnimatedMeshSceneNode() {}

		//! Sets the current frame number.
		/** From now on the animation is played from this frame.
		\param frame: Number of the frame to let the animation be started from.
		The frame number must be a valid frame number of the IMesh used by this
		scene node. Set IAnimatedMesh::getMesh() for details. */
		virtual void setCurrentFrame(f32 frame) = 0;

		//! Sets the frame numbers between the animation is looped.
		/** The default is 0 to getFrameCount()-1 of the mesh.
		Number of played frames is end-start.
		It interpolates toward the last frame but stops when it is reached.
		It does not interpolate back to start even when looping.
		Looping animations should ensure last and first frame-key are identical.
		\param begin: Start frame number of the loop.
		\param end: End frame number of the loop.
		\return True if successful, false if not. */
		virtual bool setFrameLoop(s32 begin, s32 end) = 0;

		//! Sets the speed with which the animation is played.
		/** \param framesPerSecond: Frames per second played. */
		virtual void setAnimationSpeed(f32 framesPerSecond) = 0;

		//! Gets the speed with which the animation is played.
		/** \return Frames per second played. */
		virtual f32 getAnimationSpeed() const =0;

		//! Get a pointer to a joint in the mesh (if the mesh is a bone based mesh).
		/** With this method it is possible to attach scene nodes to
		joints for example possible to attach a weapon to the left hand
		of an animated model. This example shows how:
		\code
		ISceneNode* hand =
			yourAnimatedMeshSceneNode->getJointNode("LeftHand");
		hand->addChild(weaponSceneNode);
		\endcode
		Please note that the joint returned by this method may not exist
		before this call and the joints in the node were created by it.
		\param jointName: Name of the joint.
		\return Pointer to the scene node which represents the joint
		with the specified name. Returns 0 if the contained mesh is not
		an skinned mesh or the name of the joint could not be found. */
		virtual IBoneSceneNode* getJointNode(const c8* jointName)=0;

		//! same as getJointNode(const c8* jointName), but based on id
		virtual IBoneSceneNode* getJointNode(u32 jointID) = 0;

		//! Gets joint count.
		/** \return Amount of joints in the mesh. */
		virtual u32 getJointCount() const = 0;

		//! Returns the currently displayed frame number.
		virtual f32 getFrameNr() const = 0;
		//! Returns the current start frame number.
		virtual s32 getStartFrame() const = 0;
		//! Returns the current end frame number.
		virtual s32 getEndFrame() const = 0;

		//! Sets looping mode which is on by default.
		/** If set to false, animations will not be played looped. */
		virtual void setLoopMode(bool playAnimationLooped) = 0;

		//! returns the current loop mode
		/** When true the animations are played looped */
		virtual bool getLoopMode() const = 0;

		//! Sets a callback interface which will be called if an animation playback has ended.
		/** Set this to 0 to disable the callback again.
		Please note that this will only be called when in non looped
		mode, see IAnimatedMeshSceneNode::setLoopMode(). */
		virtual void setAnimationEndCallback(IAnimationEndCallBack* callback=0) = 0;

		//! Sets if the scene node should not copy the materials of the mesh but use them in a read only style.
		/** In this way it is possible to change the materials a mesh
		causing all mesh scene nodes referencing this mesh to change
		too. */
		virtual void setReadOnlyMaterials(bool readonly) = 0;

		//! Returns if the scene node should not copy the materials of the mesh but use them in a read only style
		virtual bool isReadOnlyMaterials() const = 0;

		//! Sets a new mesh
		virtual void setMesh(IAnimatedMesh* mesh) = 0;

		//! Returns the current mesh
		virtual IAnimatedMesh* getMesh(void) = 0;

		//! Set how the joints should be updated on render
		virtual void setJointMode(E_JOINT_UPDATE_ON_RENDER mode)=0;

		//! Sets the transition time in seconds
		/** Note: This needs to enable joints, and setJointmode set to
		EJUOR_CONTROL. You must call animateJoints(), or the mesh will
		not animate. */
		virtual void setTransitionTime(f32 Time) =0;

		//! animates the joints in the mesh based on the current frame.
		/** Also takes in to account transitions. */
		virtual void animateJoints(bool CalculateAbsolutePositions=true) = 0;

		//! render mesh ignoring its transformation.
		/** Culling is unaffected. */
		virtual void setRenderFromIdentity( bool On )=0;

		//! Creates a clone of this scene node and its children.
		/** \param newParent An optional new parent.
		\param newManager An optional new scene manager.
		\return The newly created clone of this node. */
		virtual ISceneNode* clone(ISceneNode* newParent=0, ISceneManager* newManager=0) = 0;

	};

} // end namespace scene
} // end namespace irr

#endif

