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Calculates the animation for the '_top_' sub-tree, at the frame interpolated between the two (floating-point) frames given as parameters.
The interpolation coefficient is expressed as a floating-point value (0.0 to 1.0).
The animation is calculated based on the animation node descendant provided as a parameter.

I M3applyAnimKey2F ( S3d _session_ H3d _anim0_ H3d _anim1_ H3d _top_ F _frame0_ F _frame1_ F _rate_ I _flag_ )

_session_
	3D Session
_anim0_
	Animation 0
_anim1_
	Animation 1
_top_
	Tree top to be animated
_frame0_
	Animation frame #0
_frame1_
	Animation frame #1
_rate_
	Interpolation rate
_flag_
	The '_flag_' parameter is composed of the following flags : ANIM_POS animation of positions ANIM_ANG animation of rotations ANIM_TOP also applies to the animation of the '_top_' node