Thu, 06 Apr 2017 19:00:07 +0200
ht is not PVC....
""" STL related helpers """ import os, subprocess import config, data OPENSCAD_MODULES = """ module tank(x, r, h) { color("SteelBlue") render() { //rotate([90,0,0]) { translate([x, r, r]) { sphere(r = r); // bottom cylinder(h = h-2*r, r = r); } translate([x, r, h-r]) { sphere(r = r); // top cylinder(h = r*1.4, r = r*0.25); } } } module spacer(x, r, rcyl, h) { color("DarkGrey") render() { //rotate([90,0,0]) { translate([x, r, rcyl]) { difference() { cylinder(h = h-2*rcyl, r = r); cylinder(h = h-2*rcyl, r = r*0.8); } } } } $fn = 25; // high detail per default """ def run_openscad(output): """ Run openSCAD process, then convert the ascii stl to binary by using vtk """ import vtk if os.path.isfile(output): print "skipping existing file %s" % output return print "rendering %s" % output subprocess.check_call([ 'openscad', '-o', output, config.TMP_SCAD ]) # convert to binary reader = vtk.vtkSTLReader() reader.SetFileName(output) reader.Update() write = vtk.vtkSTLWriter() write.SetFileTypeToBinary() write.SetInput(reader.GetOutput()) write.SetFileName(output) write.Write() def precompile_all_stl(): """ Write .scad temp file and Invoke run_openscad for each object that needs to be created in stl directory """ base = os.path.abspath('stl') hmin = 9999 rmax = 0 for cyl in data.CYLINDER.keys(): with open(config.TMP_SCAD, "w") as fn: fn.write(OPENSCAD_MODULES) fn.write("tank(0, %f, %f);" % ( data.CYLINDER[cyl][0] / 2 * config.SCALE3D, data.CYLINDER[cyl][1] * config.SCALE3D)) run_openscad(os.path.join(base, \ 'cylinder_' + cyl + '.stl')) if data.CYLINDER[cyl][1] < hmin: hmin = data.CYLINDER[cyl][1] if data.CYLINDER[cyl][0] > rmax: rmax = data.CYLINDER[cyl][0] for pipe in data.PIPES: with open(config.TMP_SCAD, "w") as fn: fn.write(OPENSCAD_MODULES) fn.write("spacer(0, %f, %f, %f);" % ( pipe[1] / 2 * config.SCALE3D, rmax / 2 * config.SCALE3D, hmin * config.SCALE3D)) run_openscad(os.path.join(base, \ 'spacer_' + pipe[0] + '.stl'))