dotSCAD/docs/lib3x-m_rotation.md

m_rotation

Generate a 4x4 transformation matrix which can pass into multmatrix to rotate the child element about the axis of the coordinate system or around an arbitrary axis.

Since: 1.1

Parameters

• a : If it's [deg_x, deg_y, deg_z], the rotation is applied in the order x, y, z. If it's [deg_x, deg_y], the rotation is applied in the order x, y. If it's[deg_x], the rotation is only applied to the x axis. If it's an number, the rotation is only applied to the z axis or an arbitrary axis.
• v: A vector allows you to set an arbitrary axis about which the object will be rotated. When a is an array, the v argument is ignored.

Examples

use <matrix/m_rotation.scad>

point = [20, 0, 0];
a = [0, -45, 45];

hull() {
	sphere(1);
	multmatrix(m_rotation(a))    
	translate(point) 
		sphere(1);   
}  

use <matrix/m_rotation.scad>

v = [10, 10, 10];

hull() {
	sphere(1);
	translate(v)
	    sphere(1);   
}

p = [10, 10, 0];
for(i = [0:20:340]) {
	multmatrix(m_rotation(a = i, v = v))
	translate(p) 
		sphere(1);  
}