/usr/include/libwildmagic/Wm5BlendTransformController.h is in libwildmagic-dev 5.13-1+b2.
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// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.1.1 (2010/10/01)
#ifndef WM5BLENDTRANSFORMCONTROLLER_H
#define WM5BLENDTRANSFORMCONTROLLER_H
#include "Wm5GraphicsLIB.h"
#include "Wm5TransformController.h"
namespace Wm5
{
class WM5_GRAPHICS_ITEM BlendTransformController : public TransformController
{
WM5_DECLARE_RTTI;
WM5_DECLARE_NAMES;
WM5_DECLARE_STREAM(BlendTransformController);
public:
// Construction and destruction.
//
// Set 'rsMatrices' to 'true' when theinput controllers manage
// transformations of the form Y = R*S*X + T, where R is a rotation, S is
// a diagonal scale matrix of positive scales, and T is a translation;
// that is, each transform has mIsRSMatrix equal to 'true'. In this case,
// the rotation and scale blending is either geometric or arithmetic, as
// specified in the other constructor inputs. Translation blending is
// always arithmetic. Let {R0,S0,T0} and {R1,S1,T1} be the transformation
// channels, and let weight w be in [0,1]. Let {R,S,T} be the blended
// result. Let q0, q1, and q be quaternions corresponding to R0, R1, and
// R with Dot(q0,q1) >= 0 and A = angle(q0,q1) = acos(Dot(q0,q1)).
//
// Translation: T = (1-w)*T0 + w*T1
//
// Arithmetic rotation: q = Normalize((1-w)*q0 + w*q1)
// Geometric rotation:
// q = Slerp(w,q0,q1)
// = (sin((1-w)*A)*q0 + sin(w*A)*q1)/sin(A)
//
// Arithmetic scale: s = (1-w)*s0 + w*s1 for each channel s0, s1, s
// Geometric scale: s = sign(s0)*sign(s1)*pow(|s0|,1-w)*pow(|s1|,w)
// If either of s0 or s1 is zero, then s is zero.
//
// Set 'rsMatrices' to 'false' when mIsRMatrix is 'false' for either
// transformation. In this case, a weighted average of the full
// transforms is computed. This is not recommended, because the visual
// results are difficult to predict.
BlendTransformController (TransformController* controller0,
TransformController* controller1, bool rsMatrices,
bool geometricRotation = false, bool geometricScale = false);
virtual ~BlendTransformController ();
// Member access. The weight w is a number for which 0 <= w <= 1.
inline TransformController* GetController0 () const;
inline TransformController* GetController1 () const;
inline bool GetRSMatrices () const;
inline void SetWeight (float weight);
inline float GetWeight () const;
// The animation update. The application time is in milliseconds.
virtual bool Update (double applicationTime);
protected:
// Set the object for 'this' and for the managed controllers.
virtual void SetObject (ControlledObject* object);
TransformControllerPtr mController0, mController1;
float mWeight;
bool mRSMatrices, mGeometricRotation, mGeometricScale;
};
WM5_REGISTER_STREAM(BlendTransformController);
typedef Pointer0<BlendTransformController> BlendTransformControllerPtr;
#include "Wm5BlendTransformController.inl"
}
#endif
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