#include <StdMesh.h>

Public Member Functions
StdMeshTransformation	GetTransformAt (float time, float length) const

Friends
class	StdMeshSkeleton

class	StdMeshSkeletonLoader

Detailed Description

Definition at line 72 of file StdMesh.h.

Member Function Documentation

◆ GetTransformAt()

StdMeshTransformation StdMeshTrack::GetTransformAt	(	float	time,
		float	length
	)		const

Definition at line 291 of file StdMesh.cpp.

 {
     std::map<float, StdMeshKeyFrame>::const_iterator iter = Frames.lower_bound(time);
  
     // We are at or before the first keyframe. This short typically not
     // happen, since all animations have a keyframe 0. Simply return the
     // first keyframe.
     if (iter == Frames.begin())
         return iter->second.Transformation;
  
     std::map<float, StdMeshKeyFrame>::const_iterator prev_iter = iter;
     --prev_iter;
  
     float iter_pos;
     if (iter == Frames.end())
     {
         // We are beyond the last keyframe.
         // Interpolate between the last and the first keyframe.
         // See also bug #1406.
         iter = Frames.begin();
         iter_pos = length;
     }
     else
     {
         iter_pos = iter->first;
     }
  
     // No two keyframes with the same position:
     assert(iter_pos > prev_iter->first);
  
     // Requested position is between the two selected keyframes:
     assert(time >= prev_iter->first);
     assert(iter_pos >= time);
  
     float dt = iter_pos - prev_iter->first;
     float weight1 = (time - prev_iter->first) / dt;
     float weight2 = (iter_pos - time) / dt;
     (void)weight2; // used in assertion only
  
     assert(weight1 >= 0 && weight2 >= 0 && weight1 <= 1 && weight2 <= 1);
     assert(fabs(weight1 + weight2 - 1) < 1e-6);
  
     return StdMeshTransformation::Nlerp(prev_iter->second.Transformation, iter->second.Transformation, weight1);
 }