points to mm conversion

README.md

@@ -16,6 +16,9 @@ _copy 's2g' to your path and run from anywhere_
 
 **There is a brute force path optimisation algarithm. Very slow for large files, can be disabled in config.py**
 
+*illustrator exports in points* regardless of your document settings
+if units are set to points in the config file, we convert to mm on the fly
+
 There are various settings you can change in config.py. Most notably, you must set an upper and lower position for the z axis.
 
 zTravel is the height it will move to before traveling to the next stroke

config.py

@@ -41,7 +41,14 @@ precision = 2
 
 
 """ scale gcode to fit bed size"""
-auto_scale = True
+auto_scale = False
 
 """ optimize path - slow for large files"""
-optimise = True
+optimise = True
+
+""" 
+illustrator exports svg's in points, not mm
+set to "mm" if you don't want to convert to mm
+"""
+units = "points"
+#units = "mm"

optimise.py

@@ -9,6 +9,7 @@ def get_distance(a, b, sq=False):
 
     x = x2 - x1
     y = y2 - y1
+
     if sq:
         return sqrt(x * x + y * y)
     else:

svg2gcode.py

@@ -23,11 +23,12 @@ def get_shapes(path, auto_scale=True):
     shapes = []
     tree = ET.parse(path)
     root = tree.getroot()
+
+    pointRatio = 0.352778
+
     width = root.get('width')
     height = root.get('height')
 
-
-
     if width is None or height is None:
         viewbox = root.get('viewBox')
         if viewbox:
@@ -37,8 +38,15 @@ def get_shapes(path, auto_scale=True):
         print("Unable to get width and height for the svg")
         sys.exit(1)
 
-    width = float(re.sub("[^0-9]", "", width))
-    height = float(re.sub("[^0-9]", "", height))
+    # width = float(re.sub("[^0-9]", "", width))
+    # height = float(re.sub("[^0-9]", "", height))
+
+    width = float(width)
+    height = float(height)
+
+    if units == "points":
+        width *= pointRatio
+        height *= pointRatio
 
     if auto_scale:
         print("\nauto scaling")
@@ -76,6 +84,11 @@ def get_shapes(path, auto_scale=True):
 
                 for x, y in p:  # todo sort out this nightmare
 
+                    if units == "points":
+
+                        x *= pointRatio
+                        y *= pointRatio
+
                     y = -y + height
 
                     if auto_scale:
@@ -114,8 +127,13 @@ def g_string(x, y, z=False, prefix="G1", p=3):
 def shapes_2_gcode(shapes):
 
     t1 = dt.now()
-    commands = []
+    with open("header.txt") as h:
+        header = h.read()
+
+    commands = [f"{header}", f'F{feed_rate}']
+
     for i in shapes:
+        commands += ['', shape_preamble, ""]
 
         commands.append(g_string(i[0][0], i[0][1], zTravel, "G0"))
 
@@ -124,6 +142,13 @@ def shapes_2_gcode(shapes):
 
         commands.append(g_string(i[-1][0], i[-1][1], zTravel, "G0"))
 
+        commands += ["", shape_postamble, ""]
+
+    commands += [" ",postamble, ""]
+
+    commands += ["(home)", f"G0 {zTravel}", f"G0 X0 Y0"]
+
+
     timer(t1, "shapes_2_gcode   ")
     return commands