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-rw-r--r--gerber/excellon_statements.py12
-rw-r--r--gerber/render/render.py100
2 files changed, 105 insertions, 7 deletions
diff --git a/gerber/excellon_statements.py b/gerber/excellon_statements.py
index 7300b60..4b92f07 100644
--- a/gerber/excellon_statements.py
+++ b/gerber/excellon_statements.py
@@ -53,12 +53,12 @@ class ExcellonTool(ExcellonStatement):
kwargs : dict-like
Tool settings from the excellon statement. Valid keys are:
- diameter : Tool diameter [expressed in file units]
- rpm : Tool RPM
- feed_rate : Z-axis tool feed rate
- retract_rate : Z-axis tool retraction rate
- max_hit_count : Number of hits allowed before a tool change
- depth_offset : Offset of tool depth from tip of tool.
+ - `diameter` : Tool diameter [expressed in file units]
+ - `rpm` : Tool RPM
+ - `feed_rate` : Z-axis tool feed rate
+ - `retract_rate` : Z-axis tool retraction rate
+ - `max_hit_count` : Number of hits allowed before a tool change
+ - `depth_offset` : Offset of tool depth from tip of tool.
Attributes
----------
diff --git a/gerber/render/render.py b/gerber/render/render.py
index f2d23b4..e76aed1 100644
--- a/gerber/render/render.py
+++ b/gerber/render/render.py
@@ -20,7 +20,8 @@ Rendering
============
**Gerber (RS-274X) and Excellon file rendering**
-Render Gerber and Excellon files to a variety of formats.
+Render Gerber and Excellon files to a variety of formats. The render module
+currently supports SVG rendering using the `svgwrite` library.
"""
from ..gerber_statements import (CommentStmt, UnknownStmt, EofStmt, ParamStmt,
CoordStmt, ApertureStmt, RegionModeStmt,
@@ -316,21 +317,118 @@ class GerberContext(object):
self.x, self.y = x, y
def stroke(self, x, y, i, j):
+ """ Lights-on move. (draws a line or arc)
+
+ The stroke method is called when a Lights-on move statement is
+ encountered. This will call the `line` or `arc` method as necessary
+ based on the move statement's parameters. The `stroke` method should
+ be overridden in `GerberContext` subclasses.
+
+ Parameters
+ ----------
+ x : float
+ X coordinate of target position
+
+ y : float
+ Y coordinate of target position
+
+ i : float
+ Offset in X-direction from current position of arc center.
+
+ j : float
+ Offset in Y-direction from current position of arc center.
+ """
pass
def line(self, x, y):
+ """ Draw a line
+
+ Draws a line from the current position to (x, y) using the currently
+ selected aperture. The `line` method should be overridden in
+ `GerberContext` subclasses.
+
+ Parameters
+ ----------
+ x : float
+ X coordinate of target position
+
+ y : float
+ Y coordinate of target position
+ """
pass
def arc(self, x, y, i, j):
+ """ Draw an arc
+
+ Draw an arc from the current position to (x, y) using the currently
+ selected aperture. `i` and `j` specify the offset from the starting
+ position to the center of the arc.The `arc` method should be
+ overridden in `GerberContext` subclasses.
+
+ Parameters
+ ----------
+ x : float
+ X coordinate of target position
+
+ y : float
+ Y coordinate of target position
+
+ i : float
+ Offset in X-direction from current position of arc center.
+
+ j : float
+ Offset in Y-direction from current position of arc center.
+ """
pass
def flash(self, x, y):
+ """ Flash the current aperture
+
+ Draw a filled shape defined by the currently selected aperture.
+
+ Parameters
+ ----------
+ x : float
+ X coordinate of the position at which to flash
+
+ y : float
+ Y coordinate of the position at which to flash
+ """
pass
def drill(self, x, y, diameter):
+ """ Draw a drill hit
+
+ Draw a filled circle representing a drill hit at the specified
+ position and with the specified diameter.
+
+ Parameters
+ ----------
+ x : float
+ X coordinate of the drill hit
+
+ y : float
+ Y coordinate of the drill hit
+
+ diameter : float
+ Finished hole diameter to draw.
+ """
pass
def evaluate(self, stmt):
+ """ Evaluate Gerber statement and update image accordingly.
+
+ This method is called once for each statement in a Gerber/Excellon
+ file when the file's `render` method is called. The evaluate method
+ should forward the statement on to the relevant handling method based
+ on the statement type.
+
+ Parameters
+ ----------
+ statement : Statement
+ Gerber/Excellon statement to evaluate.
+
+ """
if isinstance(stmt, (CommentStmt, UnknownStmt, EofStmt)):
return