Adding new file from BowlerStudio

differential.groovy

//Your code here
double computeGearPitch(double diameterAtCrown,double numberOfTeeth){
	return ((diameterAtCrown/2)*((360.0)/numberOfTeeth)*Math.PI/180)
}

double vexGearSize = 19
double totalWidth = vexGearSize * 0.5
double vexPitch = Math.PI*1.5 * 25.4 / 36
println "pitch " + vexPitch
double pitch = vexPitch * 2
double wallThickness = 0.2
double gap = 0.1
double gearInner =totalWidth - 2 * wallThickness
double bevelMaxWidth = gearInner - gap * 2
println "bevel max width " + bevelMaxWidth
int bevelTeeth = (int) (bevelMaxWidth * 25.4 * Math.PI)/(pitch)
println "bevel teeth " + bevelTeeth
// call a script from another library
double bevelThickness = 25.4/2
def bevelGears = ScriptingEngine.gitScriptRun(
            "https://github.com/madhephaestus/GearGenerator.git", // git location of the library
            "bevelGear.groovy" , // file to load
            // Parameters passed to the funcetion
            [	  bevelTeeth,// Number of teeth gear a
	            40,// Number of teeth gear b
	            bevelThickness/2,// thickness of gear A
	            pitch,// gear pitch in arc length mm
	           90,// shaft angle, can be from 0 to 100 degrees
	            0// helical angle, only used for 0 degree bevels
            ]
            )

def outerGear = ScriptingEngine.gitScriptRun(
            "https://github.com/madhephaestus/GearGenerator.git", // git location of the library
            "bevelGear.groovy" , // file to load
            // Parameters passed to the funcetion
            [	  vexGearSize * 12,// Number of teeth gear a
	            5,// Number of teeth gear b
	            bevelThickness,// thickness of gear A
	            vexPitch,// gear pitch in arc length mm
	           0,// shaft angle, can be from 0 to 100 degrees
	            0// helical angle, only used for 0 degree bevels
            ]
            )
//Print parameters returned by the script
println "Bevel gear axle center to center " + bevelGears.get(2)
println "Bevel gear axle Height " + bevelGears.get(3)
println "Bevel angle " + bevelGears.get(4)
println "Bevel tooth face length " + bevelGears.get(5)
println "Gear B computed thickness " + bevelGears.get(6)
// return the CSG parts
double inside = 8 *25.4
double thickness = 0.5 * 25.4 
CSG hole = new Cylinder(inside/2,thickness,(int)100).toCSG()
CSG bevelouter = new Cylinder(gearInner*25.4/2 ,thickness,(int)100).toCSG()
CSG bevelWithHole = bevelGears.get(0).difference(hole)
double bevelHeight = bevelWithHole.getMaxZ() - bevelWithHole.getMinZ()
CSG underBevel = new Cylinder(gearInner*25.4/2 ,thickness-bevelHeight,(int)50).toCSG()
CSG bevelSupport = underBevel.difference(hole)

CSG outWithSupport = outerGear.get(0).difference(bevelouter).union(bevelSupport)

CSG gear = outWithSupport.movez(-1*bevelWithHole.getMaxZ()).union(bevelWithHole)
CSG cylin = new Cylinder(totalWidth *25.4 /2 ,thickness,(int)100).toCSG()
CSG bearing = cylin.difference(hole)
CSG moved = bearing.movez(gear.getMinZ() - bearing.getMaxZ())

CSG bottom = moved.union(gear)

double axleSize = 25.4 /4 +0.1
CSG axleHole = new Cube(25.4*2,axleSize,axleSize).toCSG().movez(bevelGears.get(3)).movex(-1*bevelGears.get(2))

CSG withAxle = bevelGears.get(1).difference(axleHole)

return [withAxle]