import FreeCAD, Part, math
from FreeCAD import Base
from __future__ import division # allows floating point division from integers
import sys
import os

try:
    path = os.path.dirname(__file__)
    i = sys.path.index(path)
except:
    sys.path.append(path)


#all measurements are in mm until unit conversion is added

#extrusion_profile 20mm, 25mm, 1"
extrusion_profile = 20

#how tall is the gap between the two bottom frame rectangles?
frame_rectangle_spacing = 30

#size_type ["extrusion length", "build area", "bounding box"]
size_type = "extrusion length"

extrusion_x_length = 300
extrusion_y_length = 420
extrusion_diagonal_length = 340

#build_x_length, build_y_width, build_z_height (build area)
#outside_x_length, outside_y_width, outsize_z_height (bounding box)

#x_rail_type ["makerslide", "smooth rod"]
x_rail_type = "smooth rod"
x_rod_diameter = 8
x_rod_spacing = 50
#x_rod_orientation ["horizontal","vertical"]
x_rod_orientation = "horizontal"

#y_rail_type ["makerslide", "smooth rod"]
y_rail_type = "smooth rod"
y_rod_diameter = 8
y_rod_spacing = 100

#z_rail_type ["makerslide", "smooth rod"]
z_rail_type = "smooth rod"
z_rod_diameter = 8
z_screw_diameter = 8
#distance from z smooth rod to z threaded rod
z_rod_spacing = 30

#["NEMA14", "NEMA17", "NEMA23"]
#TODO: implement motor module for dimensions, etc
x_motor_size = "NEMA17"
y_motor_size = "NEMA17"
z_motor_size = "NEMA17"

x_pulley_teeth_count = 36
x_pulley_teeth_spacing = 2
x_pulley_pitch_diameter = 72/math.pi
y_pulley_teeth_count = 36
y_pulley_teeth_spacing = 2
y_pulley_pitch_diameter = 72/math.pi

#should we limit parts to 100mmx100mm build area?
small_printer = True

#bushing_type ["printed","IGUS [part#]"LM8UU",etc]
#y_carriage_height, y_carriage_width, y_carriage_depth
#x_bearing_type, y_bearing_type ["608ZZ"]
#build_platform_height, build_platform_width, build_platform_depth

#absolute minimum thickness of any printed part, this is usually a constraint of the printing method to be used
thick_min = 1
#minimum vertical (the layered direction) thickness of any printed part
thick_min_vertical = 2
#minimum thickness of a part under compression, such as the edge of bolt holes
thick_compress = 3
#typical thickness of printed parts, for flat plates and such
thick_typical = 4.25

#TODO: better system for organizing these
hole_spacing_narrow = 10
hole_spacing_medium = 20
hole_spacing_wide = 30

import partsrc.LowerVertexMiddle
Part.show(partsrc.LowerVertexMiddle.LowerVertexMiddle())

---------- partsrc/__init__.py
(empty file)

---------- partsrc/LowerVertexMiddle.py
from __future__ import division # allows floating point division from integers


from FreeCAD import Part


import math

def LowerVertexMiddle(
extrusion_profile = 20,
frame_rectangle_spacing = 30,
thick_typical = 4.25
):

    #how big are the structural bolts?
    #TODO: replace with use of bolt module after it's written
    bolt_hole_diameter = 5.5
    bolt_head_diameter = 10

    #should there be a visible hole for easy access to the "hidden" bolt?
    accessible_hole = 1
    #should we draw the extrusions for visualization purposes?
    render_extrusions = 0

    #connect the two X extrusions
    box = Part.makeBox(frame_rectangle_spacing+extrusion_profile*2,thick_typical,extrusion_profile)
    box.translate(Base.Vector(0,-thick_typical,0))
    vertex = box
    cylinder = Part.makeCylinder(bolt_hole_diameter/2,thick_typical)
    cylinder.rotate(Base.Vector(0,0,0),Base.Vector(1,0,0),90)
    cylinder.translate(Base.Vector(extrusion_profile/2,0,extrusion_profile/2))
    vertex = vertex.cut(cylinder)
    cylinder.translate(Base.Vector(frame_rectangle_spacing+extrusion_profile,0,0))
    vertex = vertex.cut(cylinder)

    #mount to the top of the top Y extrusion
    box = Part.makeBox(thick_typical,40+extrusion_profile,extrusion_profile)
    box.translate(Base.Vector(-thick_typical,-thick_typical,0))
    vertex = vertex.fuse(box)
    cylinder = Part.makeCylinder(bolt_hole_diameter/2,thick_typical)
    cylinder.rotate(Base.Vector(0,0,0),Base.Vector(0,1,0),-90)
    cylinder.translate(Base.Vector(0,40+extrusion_profile/2-thick_typical,extrusion_profile/2))
    vertex = vertex.cut(cylinder)

    #mount to the top of the diagonal extrusion
    #TODO: cleaner calculation of length of this part to avoid trimming
    box = Part.makeBox(extrusion_profile+40,thick_typical,extrusion_profile)
    box.translate(Base.Vector(-extrusion_profile-15,-thick_typical,0))
    #fill the space below the diagonal extrusion
    box2 = Part.makeBox(extrusion_profile+5,extrusion_profile,extrusion_profile)
    box2.translate(Base.Vector(-15,0,0))
    box = box.fuse(box2)
    cylinder = Part.makeCylinder(bolt_hole_diameter/2,thick_typical)
    cylinder.rotate(Base.Vector(0,0,0),Base.Vector(1,0,0),90)
    cylinder.translate(Base.Vector(-15-extrusion_profile/2,0,extrusion_profile/2))
    box = box.cut(cylinder)
    box.rotate(Base.Vector(0,extrusion_profile,0),Base.Vector(0,0,1),-30)
    vertex = vertex.fuse(box)

    if(accessible_hole):
        cylinder = Part.makeCylinder(bolt_hole_diameter/2,extrusion_profile+60)
    else:
        cylinder = Part.makeCylinder(bolt_hole_diameter/2,extrusion_profile+5)
    cylinder2 = Part.makeCylinder(bolt_head_diameter/2,extrusion_profile+5-thick_typical)
    cylinder2.translate(Base.Vector(0,0,thick_typical))
    cylinder = cylinder.fuse(cylinder2)
    cylinder.rotate(Base.Vector(0,0,0),Base.Vector(0,1,0),90)
    cylinder.translate(Base.Vector(-15,0,0))
    cylinder.translate(Base.Vector(0,extrusion_profile/2,extrusion_profile/2))
    cylinder.rotate(Base.Vector(0,extrusion_profile,0),Base.Vector(0,0,1),-30)
    vertex = vertex.cut(cylinder)

    box = Part.makeBox(extrusion_profile,extrusion_profile,extrusion_profile)
    vertex = vertex.cut(box)
    #TODO: eliminate this trim by cleaning above
    box = Part.makeBox(40,10,extrusion_profile)
    box.translate(Base.Vector(-thick_typical-5,-10-thick_typical,0))
    vertex = vertex.cut(box)

    return vertex

if __name__ == "__main__":
    Part.show(LowerVertexMiddle())