brush.lua

-- brush exemple

hole  = cylinder(2,10)
ring  = difference(cylinder(4,10),hole)
plate = difference(cube(40,40,10),hole)

emit(plate,1)
emit(ring,0)

phasor.lua

emit(cube(50,50,10))


set_setting_value("num_shells_0", 0)

set_setting_value("print_perimeter_0", false)

set_setting_value("cover_thickness_mm_0", 0)

set_setting_value("infill_type_0","Phasor")

set_setting_value("phasor_infill_iso_0", 0)

angle = tex3d_r8f(64,64,64)

for i = 0,63 do
    for j = 0,63 do
        for k = 0,63 do
            a = 0.5*i/63.0
            angle:set(i,j,k, v(a,0.0,0.0))
        end
    end
end

set_setting_value('phasor_infill_theta_0',angle,v(-25,-25,0),v(25,25,10))

polyfoam.lua

emit(cube(50,50,10))


set_setting_value("num_shells_0", 0)

set_setting_value("print_perimeter_0", false)

set_setting_value("cover_thickness_mm_0", 0)

set_setting_value("infill_type_0","Polyfoam")

set_setting_value("kgon_x_shrink_0", 0)
set_setting_value("infill_percentage_0",30)

angle = tex3d_r8f(64,64,64)

for i = 0,63 do
    for j = 0,63 do
        for k = 0,63 do
            a = 0.5*i/63.0
            angle:set(i,j,k, v(a,0.0,0.0))
        end
    end
end

set_setting_value('infill_angle_0',angle,v(-25,-25,0),v(25,25,10))

polyfoam_2.lua

emit(cube(50,50,10))

set_setting_value("num_shells_0", 0)

set_setting_value("print_perimeter_0", false)

set_setting_value("cover_thickness_mm_0", 0)

set_setting_value("infill_type_0","Polyfoam")

set_setting_value("kgon_x_shrink_0", 0)
set_setting_value("infill_percentage_0",30)

--[[

angle = tex3d_r8f(64,64,64)

for i = 0,63 do
    for j = 0,63 do
        for k = 0,63 do
            a = (180.0 + atan2((i-31.5),(j-31.5))) / 360.0
            angle:set(i,j,k, v(a,0.0,0.0))
        end
    end
end

end

set_setting_value('infill_angle_0',angle,v(-25,-25,0),v(25,25,10))
]]

star.lua

inner_radius = ui_scalar('inner radius',5,1,10)
outer_radius = 15
thickness = 4
center = cylinder(inner_radius-1,thickness)
branch = translate(0,0,thickness/2)
       * rotate(90,0,0)
       * scale(1,thickness/(inner_radius*2.0),1)
       * cone(inner_radius,0,outer_radius)

n_branches = math.floor( ui_scalar('branches',5,1,10) )
branches = {}
for b=0,n_branches-1 do
  branches[#branches+1] = rotate(0,0,b*360/n_branches) * branch
end

envelope = translate(0,0,thickness/2)*cylinder(outer_radius,thickness)


emit( intersection(envelope,difference(union(branches),center) ))

TODO:

• to be sent by email to Sylvain dot Lefebvre at inria dot fr
• expected 30/03 by midnight, commented code + README.md with a couple paragraphs to highlight the main points of your design
• I will confirm reception, if I do not, then I did not receive your work, so please resend after 24 hours.
• tripod modeling with polyfoam infill structure, see picture
• parameterize all dimensions but the center hole diameter, the shape should not disconnect (split) for dimensions in range [1-100] mm
• place the foam in brush 1 to have a solid ring in brush 0
• beware that foam orientation is constant within a branch
• bonus: varying density