GCode generator and unittests

closes #35

pcbdevice/gcode/GcodeBuilder.py

@@ -0,0 +1,26 @@
+def listToGCode(listIndex, pHeight, pWidth):
+	gcodeCommand = []
+	toolUp = True
+	
+	if pHeight <= 0 or pWidth <= 0:
+		raise RuntimeError('Pixel dimension error')
+	
+	# HEADER
+	gcodeCommand.append('G28')
+	gcodeCommand.append('G90\n')
+	
+	for coord in listIndex:
+		if coord.getX() == -1 and coord.getY() == -1:
+			gcodeCommand.append('G0 Z0')
+			toolUp = True
+		else:
+			gcodeCommand.append('G0 X' + str(coord.getX()*pWidth) + ' Y' + str(coord.getY()*pHeight))
+			if toolUp:
+				gcodeCommand.append('G0 Z3')
+				toolUp = False
+			
+	# FOOTER
+	gcodeCommand.append('\nG0 Z0')
+	gcodeCommand.append('G28')
+	
+	return gcodeCommand