add a Makefile to export the cadquery to stl and gcode

.gitignore

@@ -1 +1,2 @@
 __pycache__
+build/

Makefile

@@ -0,0 +1,58 @@
+PREFIX=/usr
+SHAREDIR=$(PREFIX)/share/models
+PRINT_TEMP=220
+PRINT_BED_TEMP=40
+PRINT_NOZZLE_DIAM=0.2
+PRINT_FILA_DIAM=1.75
+
+# settings for Bambu p1p 3d printer
+# 50mm/sec w/ raft=2, 0.4diam (wrong!), density 20%: works but causes very rough edges
+# 40mm/sec w/ raft=0, 0.4diam (wrong!), density 20%: fails; infill becomes too sparse
+# 35mm/sec w/ raft=0, 0.4diam (wrong!), density 50%, honeycomb: works, corners are rough
+# 25mm/sec w/ raft=0, 0.2diam, density 75%, rectilinear: fails; detached from bed
+# 35mm/sec w/ raft=0, 0.2diam, density 75%, rectilinear, first-layer 0.2: works, but takes like 6 hours to print
+# - 2.5mm thickness => needlessly thick; stiff
+# - 160mm length => too short
+# - 3/3.5/6.0mm screen overhang => too much (that amount of overhang can't be printed reliably)
+# - port cutouts => should extend into more z
+PRINT_SPEED=40
+PRINT_DENSITY=20
+PRINT_RAFT_LAYERS=0
+PRINT_FILL_PATTERN=honeycomb
+# XXX: Slic3r doesn't always set the bed temperature correctly. fix by specifying it also for the first layer.
+SLIC3R_FLAGS=\
+	--temperature $(PRINT_TEMP) \
+	--first-layer-temperature $(PRINT_TEMP) \
+	--bed-temperature $(PRINT_BED_TEMP) \
+	--first-layer-bed-temperature $(PRINT_BED_TEMP) \
+	--nozzle-diameter $(PRINT_NOZZLE_DIAM) \
+	--filament-diameter $(PRINT_FILA_DIAM) \
+	--solid-infill-speed $(PRINT_SPEED) \
+	--first-layer-speed $(PRINT_SPEED) \
+	--infill-speed $(PRINT_SPEED) \
+	--raft-layers $(PRINT_RAFT_LAYERS) \
+	--fill-density $(PRINT_DENSITY) \
+	--fill-pattern $(PRINT_FILL_PATTERN) \
+	--use-firmware-retraction \
+	--first-layer-height 0.2 \
+	--skirts 2
+
+all: build/case.stl build/case.gcode
+
+install:
+	mkdir -p $(SHAREDIR)
+	install -m644 build/case.stl $(SHAREDIR)
+	install -m644 build/case.gcode $(SHAREDIR)
+
+clean:
+	rm -rf build
+
+build/case.stl: src/*.py
+	mkdir -p $(shell dirname $@)
+	./cq_toplevel.py --export-stl $@
+
+%.gcode: %.stl
+	slic3r $(SLIC3R_FLAGS) $< -o $@
+
+.PHONY: all install clean
+

flake.nix

@@ -14,6 +14,7 @@
       buildInputs = [
         cqPkgs.cadquery
         cqPkgs.cq-editor
+        pkgs.slic3r
         # (pkgs.python37.withPackages (ps: with ps; [ cadquery ]))
       ];
     };