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/*
* Utility functions.
*
* Originally by Hans Häggström, 2010.
* Dual licenced under Creative Commons Attribution-Share Alike 3.0 and LGPL2 or later
*/
include <lib/mcad/units.scad>
function distance(a, b) = sqrt( (a[0] - b[0])*(a[0] - b[0]) +
(a[1] - b[1])*(a[1] - b[1]) +
(a[2] - b[2])*(a[2] - b[2]) );
function length2(a) = sqrt( a[0]*a[0] + a[1]*a[1] );
function normalized(a) = a / (max(distance([0,0,0], a), 0.00001));
function angleOfNormalizedVector(n) = [0, -atan2(n[2], length2([n[0], n[1]])), atan2(n[1], n[0]) ];
function angle(v) = angleOfNormalizedVector(normalized(v));
function angleBetweenTwoPoints(a, b) = angle(normalized(b-a));
CENTER = 0;
LEFT = -0.5;
RIGHT = 0.5;
TOP = 0.5;
BOTTOM = -0.5;
FlatCap =0;
ExtendedCap =0.5;
CutCap =-0.5;
module fromTo(from=[0,0,0], to=[1*m,0,0], size=[1*cm, 1*cm], align=[CENTER, CENTER], material=[0.5, 0.5, 0.5], name="", endExtras=[0,0], endCaps=[FlatCap, FlatCap], rotation=[0,0,0], printString=true) {
angle = angleBetweenTwoPoints(from, to);
length = distance(from, to) + endCaps[0]*size[0] + endCaps[1]*size[0] + endExtras[0] + endExtras[1];
if (length > 0) {
if (printString) echo(str(" " ,name, " ", size[0], "mm x ", size[1], "mm, length ",length,"mm"));
color(material)
translate(from)
rotate(angle)
translate( [ -endCaps[0]*size[0] - endExtras[0], size[0]*(-0.5-align[0]), size[1]*(-0.5+align[1]) ] )
rotate(rotation)
scale([length, size[0], size[1]]) child();
}
}
module part(name) {
echo("");
echo(str(name, ":"));
}
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