source: downloads/ogre_src_v1-9-0/OgreMain/include/OgreAnimationState.h @ 148

/*
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This source file is part of OGRE
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*/

#ifndef __AnimationSet_H__
#define __AnimationSet_H__

#include "OgrePrerequisites.h"

#include "OgreString.h"
#include "OgreController.h"
#include "OgreIteratorWrappers.h"
#include "Threading/OgreThreadHeaders.h"
#include "OgreHeaderPrefix.h"

namespace Ogre {

        /** \addtogroup Core
        *  @{
        */
        /** \addtogroup Animation
        *  @{
        */

    /** Represents the state of an animation and the weight of its influence. 
    @remarks
        Other classes can hold instances of this class to store the state of any animations
        they are using.
    */
        class _OgreExport AnimationState : public AnimationAlloc
    {
    public:

        /// Typedef for an array of float values used as a bone blend mask
        typedef vector<float>::type BoneBlendMask;

        /** Normal constructor with all params supplied
            @param
                animName The name of this state.
            @param
                parent The parent AnimationStateSet that this state will belong to.
            @param
                timePos The position, in seconds, where this state will begin.
            @param
                length The length, in seconds, of this animation state.
            @param
                weight Weight to apply the animation state with.
            @param
                enabled Whether the animation state is enabled.
        */
        AnimationState(const String& animName, AnimationStateSet *parent, 
                        Real timePos, Real length, Real weight = 1.0, bool enabled = false);
                /// Constructor to copy from an existing state with new parent
                AnimationState(AnimationStateSet* parent, const AnimationState &rhs);
                virtual ~AnimationState();
        
        /// Gets the name of the animation to which this state applies
        const String& getAnimationName() const;
        /// Gets the time position for this animation
        Real getTimePosition(void) const;
        /// Sets the time position for this animation
        void setTimePosition(Real timePos);
        /// Gets the total length of this animation (may be shorter than whole animation)
        Real getLength() const;
        /// Sets the total length of this animation (may be shorter than whole animation)
        void setLength(Real len);
        /// Gets the weight (influence) of this animation
        Real getWeight(void) const;
        /// Sets the weight (influence) of this animation
        void setWeight(Real weight);
        /** Modifies the time position, adjusting for animation length
        @param offset The amount of time, in seconds, to extend the animation.
        @remarks
            This method loops at the edges if animation looping is enabled.
        */
        void addTime(Real offset);

                /// Returns true if the animation has reached the end and is not looping
                bool hasEnded(void) const;

        /// Returns true if this animation is currently enabled
        bool getEnabled(void) const;
        /// Sets whether this animation is enabled
        void setEnabled(bool enabled);

        /// Equality operator
        bool operator==(const AnimationState& rhs) const;
        /// Inequality operator
        bool operator!=(const AnimationState& rhs) const;

        /** Sets whether or not an animation loops at the start and end of
            the animation if the time continues to be altered.
        */
        void setLoop(bool loop) { mLoop = loop; }
        /// Gets whether or not this animation loops            
        bool getLoop(void) const { return mLoop; }
     
        /** Copies the states from another animation state, preserving the animation name
        (unlike operator=) but copying everything else.
        @param animState Reference to animation state which will use as source.
        */
        void copyStateFrom(const AnimationState& animState);

                /// Get the parent animation state set
                AnimationStateSet* getParent(void) const { return mParent; }

      /** @brief Create a new blend mask with the given number of entries
       *
       * In addition to assigning a single weight value to a skeletal animation,
       * it may be desirable to assign animation weights per bone using a 'blend mask'.
       *
       * @param blendMaskSizeHint 
       *   The number of bones of the skeleton owning this AnimationState.
           * @param initialWeight
           *   The value all the blend mask entries will be initialised with (negative to skip initialisation)
       */
      void createBlendMask(size_t blendMaskSizeHint, float initialWeight = 1.0f);
      /// Destroy the currently set blend mask
      void destroyBlendMask();
      /** @brief Set the blend mask data (might be dangerous)
       *
       * @par The size of the array should match the number of entries the
       *      blend mask was created with.
       *
       * @par Stick to the setBlendMaskEntry method if you don't know exactly what you're doing.
       */
      void _setBlendMaskData(const float* blendMaskData);
      /** @brief Set the blend mask
       *
       * @par The size of the array should match the number of entries the
       *      blend mask was created with.
       *
       * @par Stick to the setBlendMaskEntry method if you don't know exactly what you're doing.
       */
      void _setBlendMask(const BoneBlendMask* blendMask);
      /// Get the current blend mask (const version, may be 0) 
      const BoneBlendMask* getBlendMask() const {return mBlendMask;}
      /// Return whether there is currently a valid blend mask set
      bool hasBlendMask() const {return mBlendMask != 0;}
      /// Set the weight for the bone identified by the given handle
      void setBlendMaskEntry(size_t boneHandle, float weight);
      /// Get the weight for the bone identified by the given handle
      inline float getBlendMaskEntry(size_t boneHandle) const
      {
          assert(mBlendMask && mBlendMask->size() > boneHandle);
          return (*mBlendMask)[boneHandle];
      }
    protected:
        /// The blend mask (containing per bone weights)
        BoneBlendMask* mBlendMask;

        String mAnimationName;
                AnimationStateSet* mParent;
        Real mTimePos;
        Real mLength;
        Real mWeight;
        bool mEnabled;
        bool mLoop;

    };

        // A map of animation states
        typedef map<String, AnimationState*>::type AnimationStateMap;
        typedef MapIterator<AnimationStateMap> AnimationStateIterator;
        typedef ConstMapIterator<AnimationStateMap> ConstAnimationStateIterator;
    // A list of enabled animation states
    typedef list<AnimationState*>::type EnabledAnimationStateList;
    typedef ConstVectorIterator<EnabledAnimationStateList> ConstEnabledAnimationStateIterator;

        /** Class encapsulating a set of AnimationState objects.
        */
        class _OgreExport AnimationStateSet : public AnimationAlloc
        {
        public:
                /// Mutex, public for external locking if needed
            OGRE_AUTO_MUTEX;
                /// Create a blank animation state set
                AnimationStateSet();
                /// Create an animation set by copying the contents of another
                AnimationStateSet(const AnimationStateSet& rhs);

                ~AnimationStateSet();

                /** Create a new AnimationState instance. 
                @param animName The name of the animation
                @param timePos Starting time position
                @param length Length of the animation to play
                @param weight Weight to apply the animation with 
                @param enabled Whether the animation is enabled
                */
                AnimationState* createAnimationState(const String& animName,  
                        Real timePos, Real length, Real weight = 1.0, bool enabled = false);
                /// Get an animation state by the name of the animation
                AnimationState* getAnimationState(const String& name) const;
                /// Tests if state for the named animation is present
                bool hasAnimationState(const String& name) const;
                /// Remove animation state with the given name
                void removeAnimationState(const String& name);
                /// Remove all animation states
                void removeAllAnimationStates(void);

                /** Get an iterator over all the animation states in this set.
                @note
                        The iterator returned from this method is not threadsafe,
                        you will need to manually lock the public mutex on this
                        class to ensure thread safety if you need it.
                */
                AnimationStateIterator getAnimationStateIterator(void);
                /** Get an iterator over all the animation states in this set.
                @note
                        The iterator returned from this method is not threadsafe,
                        you will need to manually lock the public mutex on this
                        class to ensure thread safety if you need it.
                */
                ConstAnimationStateIterator getAnimationStateIterator(void) const;
                /// Copy the state of any matching animation states from this to another
                void copyMatchingState(AnimationStateSet* target) const;
                /// Set the dirty flag and dirty frame number on this state set
                void _notifyDirty(void);
                /// Get the latest animation state been altered frame number
                unsigned long getDirtyFrameNumber(void) const { return mDirtyFrameNumber; }

        /// Internal method respond to enable/disable an animation state
        void _notifyAnimationStateEnabled(AnimationState* target, bool enabled);
        /// Tests if exists enabled animation state in this set
        bool hasEnabledAnimationState(void) const { return !mEnabledAnimationStates.empty(); }
                /** Get an iterator over all the enabled animation states in this set
                @note
                        The iterator returned from this method is not threadsafe,
                        you will need to manually lock the public mutex on this
                        class to ensure thread safety if you need it.
                */
                ConstEnabledAnimationStateIterator getEnabledAnimationStateIterator(void) const;

        protected:
                unsigned long mDirtyFrameNumber;
                AnimationStateMap mAnimationStates;
        EnabledAnimationStateList mEnabledAnimationStates;

        };

        /** ControllerValue wrapper class for AnimationState.
        @remarks
                In Azathoth and earlier, AnimationState was a ControllerValue but this
                actually causes memory problems since Controllers delete their values
                automatically when there are no further references to them, but AnimationState
                is deleted explicitly elsewhere so this causes double-free problems.
                This wrapper acts as a bridge and it is this which is destroyed automatically.
        */
        class _OgreExport AnimationStateControllerValue : public ControllerValue<Real>
        {
        protected:
                AnimationState* mTargetAnimationState;
        public:
                /** Constructor, pass in the target animation state. */
                AnimationStateControllerValue(AnimationState* targetAnimationState)
                        : mTargetAnimationState(targetAnimationState) {}
                /// Destructor (parent already virtual)
                ~AnimationStateControllerValue() {}
                /** ControllerValue implementation. */
                Real getValue(void) const;

                /** ControllerValue implementation. */
                void setValue(Real value);

        };

        /** @} */       
        /** @} */
}

#include "OgreHeaderSuffix.h"

#endif