Update meshbuilder_Spiral.scad

Now using pointsutils

demo/meshbuilder_Spiral.scad

@@ -1,18 +1,12 @@
 use <pathbuilder.scad>
 use <meshbuilder.scad>
-
-$fn=128;
-
-function rotate(x, y, z, angle) = let (
-    c = cos(angle),
-    s = sin(angle),
-    nx = (c * x) + (s * y),
-    ny = (c * y) - (s * x)) [nx, ny, z];
+use <pointutils.scad>
+$fn=32;
 
 module spiral(shape, angle, step, pitch){
     l = len(shape);
     pl = [for(j=[l:-1:0]) let(k=(j==l? 0:j)) [for(i=[0:step:angle-1])
-        rotate( shape[k][0],shape[k][1], shape[k][2]+i*pitch/360, i)]];
+        rotatePoint( [shape[k][0],shape[k][1], shape[k][2]+i*pitch/360], i)]];
     n = len(pl[0]);
     //  Manually add end caps
     front_cap = [for(i=[0:l-1]) n*i];
@@ -22,7 +16,8 @@ module spiral(shape, angle, step, pitch){
 }
 
 points = svgPoints("m5,0 h1 a10,10,0,0,1,10,0h1,v-2 a12,12,0,0,0,-12,0")[0];
-
+//echo(points);
+//points = [[M]];
 //  swap y and z axis
 shape = [for(pt = points) [pt[0],0,pt[1]]];