workaround to linear extrude a 3d object

openscad_extrude_3d_object.scad

module inclinate(direction = [0, 0, 1]){
  a = norm([direction[0], direction[1], direction[2]]);
  b = acos(direction[2]/a);
  c = atan2(direction[1], direction[0]);
  rotate([0, b, c]) union() {
    children();
  }
}
module extrude_3d(length, direction){
  minkowski(){
    inclinate(direction) cube([1e-300,1e-300,length]);
    children();
  }
}
module usage_example(){
  extrude_3d(length = 10, direction = [1,0,0]){
    union(){
      cube(center=true,[1,1,1]);
      cube(center=true,[0.5,0.5,10]);
    }
  }
}