three_frame - construct a 3D frame.

Calling Sequence

[tf]=three_frame([tp[,tv_x[,tv_y[,tv_z]]]])

Parameters

• tp : the origin of the frame, defaulted (0,0,0)
• tv_x : the unit vector in X direction. default (1,0,0)
• tv_y : the unit vector in Y direction. default (0,1,0)
• tv_z : the unit vector in Z direction. default (0,0,1)
• tf : the output 3D frame.

Description

construct a frame in 3D space. The input three vectors must be orthogonal, but need not be normalized

Examples

	tf=three_frame();
	tp=three_point(0,0,10);
	tv_x=three_vector(1,0,0);
	tv_y=three_vector(0,1,0);
	tv_z=three_vector(0,0,-1);
	tf=three_frame(tp,tv_x,tv_y,tv_z);
 

Author

Chen jingyuan, Gan guangyong (IAPCM, Beijing,China.)

See Also

three_point ,   three_vector ,   three_translation ,   three_rotation ,   three_reflection ,