#### 10.9.10 getdroite (3D straight line)

• getdroite( <[3Dpoint,3Dvector]> [, scale] )
• Description: that macro returns a 3D segment corresponding to the line <[3Dpoint,3Dvector]> clipped by the current 3D window. The line is defined in the form of one of its points and a direction vector. The optional parameter <scale>, is $1$ by default, is used to scale up or down the size of that segment (with respect to its middle).