urho3d/Engine/Graphics/Skeleton.h

//
// Urho3D Engine
// Copyright (c) 2008-2011 Lasse Öörni
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#pragma once

#include "BoundingBox.h"
#include "Node.h"

static const unsigned BONECOLLISION_NONE = 0x0;
static const unsigned BONECOLLISION_SPHERE = 0x1;
static const unsigned BONECOLLISION_BOX = 0x2;

class Deserializer;
class ResourceCache;
class Serializer;

/// Bone in a skeleton
struct Bone
{
    Bone() :
        parentIndex_(0),
        collisionMask_(0),
        radius_(0.0f),
        initialPosition_(Vector3::ZERO),
        initialRotation_(Quaternion::IDENTITY),
        initialScale_(Vector3::UNITY),
        animated_(true)
    {
    }
    
    /// Bone name
    String name_;
    /// Bone name hash
    StringHash nameHash_;
    /// Parent bone index
    unsigned parentIndex_;
    /// Reset position
    Vector3 initialPosition_;
    /// Reset rotation
    Quaternion initialRotation_;
    /// Reset scale
    Vector3 initialScale_;
    /// Offset matrix
    Matrix3x4 offsetMatrix_;
    /// Animation enable flag
    bool animated_;
    /// Supported collision types
    unsigned char collisionMask_;
    /// Radius
    float radius_;
    /// Bounding box
    BoundingBox boundingBox_;
    /// Scene node
    WeakPtr<Node> node_;
};

/// Hierarchical collection of bones
class Skeleton
{
public:
    /// Construct an empty skeleton
    Skeleton();
    /// Destruct
    ~Skeleton();
    
    /// Read from a stream. Return true if successful
    bool Load(Deserializer& source);
    /// Write to a stream. Return true if successful
    bool Save(Serializer& dest);
    /// Define from another skeleton
    void Define(const Skeleton& src);
    /// Clear bones
    void ClearBones();
    /// Reset all animating bones to initial positions
    void Reset();
    
    /// Return all bones
    const Vector<Bone>& GetBones() const { return bones_; }
    /// Return modifiable bones
    Vector<Bone>& GetModifiableBones() { return bones_; }
    /// Return number of bones
    unsigned GetNumBones() const { return bones_.Size(); }
    /// Return root bone
    Bone* GetRootBone();
    /// Return bone by index
    Bone* GetBone(unsigned index);
    /// Return bone by name
    Bone* GetBone(const String& boneName);
    /// Return bone by name hash
    Bone* GetBone(StringHash boneNameHash);
    
private:
    /// Bones
    Vector<Bone> bones_;
    /// Root bone index
    unsigned rootBoneIndex_;
};