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dxf export: Use different colors for layers.

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With this change, different colors are assigned to shapes. Shapes on the same layer get the same color. This allows them to be grouped by color by software that doesn’t support layers (e.g. Lasercut 5.3).
This commit is contained in:
Michael Schwarz 2015-03-21 12:45:02 +01:00
parent fb72dca77a
commit 8d697f0784
1 changed files with 18 additions and 8 deletions
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26
support/dxf_export/effect.py
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@ -32,6 +32,7 @@ class DXFExportEffect(inkex.Effect):
self._dxf_instructions = []
self._handle = 255
self._layer_indices = { }
self._flatness = float(os.environ['DXF_FLATNESS'])
def _get_user_unit(self):
@ -66,13 +67,22 @@ class DXFExportEffect(inkex.Effect):
def _get_document_height_attr(self):
return self.document.getroot().xpath('@height', namespaces = inkex.NSS)[0]
def _get_layer_index(self, layer_name):
index = self._layer_indices.get(layer_name)
if index is None:
index = len(self._layer_indices)
self._layer_indices[layer_name] = index
return index
def _add_instruction(self, code, value):
self._dxf_instructions.append((code, str(value)))
def _add_dxf_line(self, layer, csp):
def _add_dxf_line(self, layer_name, csp):
self._add_instruction(0, 'LINE')
self._add_instruction(8, layer)
self._add_instruction(62, 4)
self._add_instruction(8, layer_name)
self._add_instruction(62, self._get_layer_index(layer_name))
self._add_instruction(5, '{:x}'.format(self._handle))
self._add_instruction(100, 'AcDbEntity')
self._add_instruction(100, 'AcDbLine')
@ -83,7 +93,7 @@ class DXFExportEffect(inkex.Effect):
self._add_instruction(21, repr(csp[1][1]))
self._add_instruction(31, 0.0)
def _add_dxf_path(self, layer, path):
def _add_dxf_path(self, layer_name, path):
cspsubdiv.cspsubdiv(path, self._flatness)
for sub in path:
@ -91,10 +101,10 @@ class DXFExportEffect(inkex.Effect):
self._handle += 1
s = sub[i]
e = sub[i + 1]
self._add_dxf_line(layer, [s[1], e[1]])
self._add_dxf_line(layer_name, [s[1], e[1]])
def _add_dxf_shape(self, node, document_transform, element_transform):
layer = self._get_inkscape_layer(node)
layer_name = self._get_inkscape_layer_name(node)
path = cubicsuperpath.parsePath(node.get('d'))
transform = simpletransform.composeTransform(
@ -103,7 +113,7 @@ class DXFExportEffect(inkex.Effect):
simpletransform.applyTransformToPath(transform, path)
self._add_dxf_path(layer, path)
self._add_dxf_path(layer_name, path)
def effect(self):
user_unit = self._get_user_unit()
@ -153,7 +163,7 @@ class DXFExportEffect(inkex.Effect):
return value * cls._get_unit_factor(unit, default_unit_factor)
@classmethod
def _get_inkscape_layer(cls, node):
def _get_inkscape_layer_name(cls, node):
while node is not None:
layer = node.get(inkex.addNS('label', 'inkscape'))