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-rw-r--r--gerbonara/gerber/apertures.py49
-rw-r--r--gerbonara/gerber/graphic_objects.py148
-rw-r--r--gerbonara/gerber/graphic_primitives.py259
-rw-r--r--gerbonara/gerber/rs274x.py60
4 files changed, 384 insertions, 132 deletions
diff --git a/gerbonara/gerber/apertures.py b/gerbonara/gerber/apertures.py
index 7c98775..104b021 100644
--- a/gerbonara/gerber/apertures.py
+++ b/gerbonara/gerber/apertures.py
@@ -7,9 +7,12 @@ from .aperture_macros.parse import GenericMacros
from . import graphic_primitives as gp
-def _flash_hole(self, x, y):
+def _flash_hole(self, x, y, unit=None):
if self.hole_rect_h is not None:
- return self.primitives(x, y), Rectangle((x, y), (self.hole_dia, self.hole_rect_h), rotation=self.rotation, polarity_dark=False)
+ return [*self.primitives(x, y, unit),
+ Rectangle((x, y),
+ (self.convert(self.hole_dia, unit), self.convert(self.hole_rect_h, unit)),
+ rotation=self.rotation, polarity_dark=False)]
else:
return self.primitives(x, y), Circle((x, y), self.hole_dia, polarity_dark=False)
@@ -71,11 +74,10 @@ class Aperture:
return out
- def flash(self, x, y):
- return self.primitives(x, y)
+ def flash(self, x, y, unit=None):
+ return self.primitives(x, y, unit)
- @property
- def equivalent_width(self):
+ def equivalent_width(self, unit=None):
raise ValueError('Non-circular aperture used in interpolation statement, line width is not properly defined.')
def to_gerber(self, settings=None):
@@ -108,17 +110,16 @@ class CircleAperture(Aperture):
hole_rect_h : Length(float) = None
rotation : float = 0 # radians; for rectangular hole; see hack in Aperture.to_gerber
- def primitives(self, x, y, rotation):
- return [ gp.Circle(x, y, self.diameter/2) ]
+ def primitives(self, x, y, unit=None):
+ return [ gp.Circle(x, y, self.convert(self.diameter/2, unit)) ]
def __str__(self):
return f'<circle aperture d={self.diameter:.3}>'
flash = _flash_hole
- @property
- def equivalent_width(self):
- return self.diameter
+ def equivalent_width(self, unit=None):
+ return self.convert(self.diameter, unit)
def dilated(self, offset, unit='mm'):
offset = self.convert_from(offset, unit)
@@ -150,17 +151,16 @@ class RectangleAperture(Aperture):
hole_rect_h : Length(float) = None
rotation : float = 0 # radians
- def primitives(self, x, y):
- return [ gp.Rectangle(x, y, self.w, self.h, rotation=self.rotation) ]
+ def primitives(self, x, y, unit=None):
+ return [ gp.Rectangle(x, y, self.convert(self.w, unit), self.convert(self.h, unit), rotation=self.rotation) ]
def __str__(self):
return f'<rect aperture {self.w:.3}x{self.h:.3}>'
flash = _flash_hole
- @property
- def equivalent_width(self):
- return math.sqrt(self.w**2 + self.h**2)
+ def equivalent_width(self, unit=None):
+ return self.convert(math.sqrt(self.w**2 + self.h**2), unit)
def dilated(self, offset, unit='mm'):
offset = self.convert_from(offset, unit)
@@ -200,8 +200,8 @@ class ObroundAperture(Aperture):
hole_rect_h : Length(float) = None
rotation : float = 0
- def primitives(self, x, y):
- return [ gp.Obround(x, y, self.w, self.h, rotation=self.rotation) ]
+ def primitives(self, x, y, unit=None):
+ return [ gp.Obround(x, y, self.convert(self.w, unit), self.convert(self.h, unit), rotation=self.rotation) ]
def __str__(self):
return f'<obround aperture {self.w:.3}x{self.h:.3}>'
@@ -246,8 +246,8 @@ class PolygonAperture(Aperture):
rotation : float = 0
hole_dia : Length(float) = None
- def primitives(self, x, y):
- return [ gp.RegularPolygon(x, y, diameter, n_vertices, rotation=self.rotation) ]
+ def primitives(self, x, y, unit=None):
+ return [ gp.RegularPolygon(x, y, self.convert(diameter, unit), n_vertices, rotation=self.rotation) ]
def __str__(self):
return f'<{self.n_vertices}-gon aperture d={self.diameter:.3}'
@@ -279,16 +279,13 @@ class ApertureMacroInstance(Aperture):
parameters : [float]
rotation : float = 0
- def __post__init__(self, macro):
- self._primitives = macro.to_graphic_primitives(parameters)
-
@property
def gerber_shape_code(self):
return self.macro.name
- def primitives(self, x, y):
- # FIXME return graphical primitives not macro primitives here
- return [ primitive.with_offset(x, y).rotated(self.rotation, cx=0, cy=0) for primitive in self._primitives ]
+ def primitives(self, x, y, unit=None):
+ return [ primitive.with_offset(x, y).rotated(self.rotation, cx=0, cy=0)
+ for primitive in self.macro.to_graphic_primitives(self.parameters, unit=unit) ]
def dilated(self, offset, unit='mm'):
return replace(self, macro=self.macro.dilated(offset, unit))
diff --git a/gerbonara/gerber/graphic_objects.py b/gerbonara/gerber/graphic_objects.py
index 5c523d5..d9736cf 100644
--- a/gerbonara/gerber/graphic_objects.py
+++ b/gerbonara/gerber/graphic_objects.py
@@ -5,29 +5,69 @@ from dataclasses import dataclass, KW_ONLY, astuple, replace
from . import graphic_primitives as gp
from .gerber_statements import *
+
+def convert(value, src, dst):
+ if src == dst or src is None or dst is None or value is None:
+ return value
+ elif dst == 'mm':
+ return value * 25.4
+ else:
+ return value / 25.4
+
+class Length:
+ def __init__(self, obj_type):
+ self.type = obj_type
+
@dataclass
class GerberObject:
_ : KW_ONLY
polarity_dark : bool = True
unit : str = None
- def to_primitives(self):
+ def converted(self, unit):
+ return replace(self,
+ **{
+ f.name: convert(getattr(self, f.name), self.unit, unit)
+ for f in fields(self)
+ })
+
+ def _conv(self, value, unit):
+ return convert(value, src=unit, dst=self.unit)
+
+ def with_offset(self, dx, dy, unit='mm'):
+ dx, dy = self._conv(dx, unit), self._conv(dy, unit)
+ return self._with_offset(dx, dy)
+
+ def rotate(self, rotation, cx=0, cy=0, unit='mm'):
+ cx, cy = self._conv(cx, unit), self._conv(cy, unit)
+ return self._rotate(cx, cy)
+
+ def bounding_box(self, unit=None):
+ bboxes = [ p.bounding_box for p in self.to_primitives(unit) ]
+ min_x = min(min_x for (min_x, _min_y), _ in bboxes)
+ min_y = min(min_y for (_min_x, min_y), _ in bboxes)
+ max_x = max(max_x for _, (max_x, _max_y) in bboxes)
+ max_y = max(max_y for _, (_max_x, max_y) in bboxes)
+ return ((min_x, min_y), (max_x, max_y))
+
+ def to_primitives(self, unit=None):
raise NotImplementedError()
@dataclass
class Flash(GerberObject):
- x : float
- y : float
+ x : Length(float)
+ y : Length(float)
aperture : object
- def with_offset(self, dx, dy):
+ def _with_offset(self, dx, dy):
return replace(self, x=self.x+dx, y=self.y+dy)
- def rotate(self, rotation, cx=0, cy=0):
+ def _rotate(self, rotation, cx=0, cy=0):
self.x, self.y = gp.rotate_point(self.x, self.y, rotation, cx, cy)
- def to_primitives(self):
- yield from self.aperture.flash(self.x, self.y)
+ def to_primitives(self, unit=None):
+ conv = self.converted(unit)
+ yield from self.aperture.flash(conv.x, conv.y, unit)
def to_statements(self, gs):
yield from gs.set_polarity(self.polarity_dark)
@@ -48,31 +88,33 @@ class Region(GerberObject):
def __bool__(self):
return bool(self.poly)
- def with_offset(self, dx, dy):
+ def _with_offset(self, dx, dy):
return Region([ (x+dx, y+dy) for x, y in self.poly.outline ],
self.poly.arc_centers,
polarity_dark=self.polarity_dark,
unit=self.unit)
- def rotate(self, angle, cx=0, cy=0):
+ def _rotate(self, angle, cx=0, cy=0):
self.poly.outline = [ gp.rotate_point(x, y, angle, cx, cy) for x, y in self.poly.outline ]
self.poly.arc_centers = [
- gp.rotate_point(*center, angle, cx, cy) if center else None
- for center in self.poly.arc_centers ]
+ (arc[0], gp.rotate_point(*arc[1], angle, cx, cy)) if arc else None
+ for arc in self.poly.arc_centers ]
def append(self, obj):
+ if obj.unit != self.unit:
+ raise ValueError('Cannot append Polyline with "{obj.unit}" coords to Region with "{self.unit}" coords.')
if not self.poly.outline:
self.poly.outline.append(obj.p1)
self.poly.outline.append(obj.p2)
if isinstance(obj, Arc):
- self.poly.arc_centers.append(obj.center)
+ self.poly.arc_centers.append((obj.clockwise, obj.center))
else:
self.poly.arc_centers.append(None)
- def to_primitives(self):
+ def to_primitives(self, unit=None):
self.poly.polarity_dark = polarity_dark
- yield self.poly
+ yield self.poly.converted(unit)
def to_statements(self, gs):
yield from gs.set_polarity(self.polarity_dark)
@@ -87,9 +129,9 @@ class Region(GerberObject):
gs.update_point(*point, unit=self.unit)
else:
- cx, cy = arc_center
+ clockwise, (cx, cy) = arc_center
x2, y2 = point
- yield from gs.set_interpolation_mode(CircularCCWModeStmt)
+ yield from gs.set_interpolation_mode(CircularCWModeStmt if clockwise else CircularCCWModeStmt)
yield InterpolateStmt(x2, y2, cx-x2, cy-y2, unit=self.unit)
gs.update_point(x2, y2, unit=self.unit)
@@ -99,16 +141,16 @@ class Region(GerberObject):
@dataclass
class Line(GerberObject):
# Line with *round* end caps.
- x1 : float
- y1 : float
- x2 : float
- y2 : float
+ x1 : Length(float)
+ y1 : Length(float)
+ x2 : Length(float)
+ y2 : Length(float)
aperture : object
- def with_offset(self, dx, dy):
+ def _with_offset(self, dx, dy):
return replace(self, x1=self.x1+dx, y1=self.y1+dy, x2=self.x2+dx, y2=self.y2+dy)
- def rotate(self, rotation, cx=0, cy=0):
+ def _rotate(self, rotation, cx=0, cy=0):
self.x1, self.y1 = gp.rotate_point(self.x1, self.y1, rotation, cx, cy)
self.x2, self.y2 = gp.rotate_point(self.x2, self.y2, rotation, cx, cy)
@@ -120,8 +162,9 @@ class Line(GerberObject):
def p2(self):
return self.x2, self.y2
- def to_primitives(self):
- yield gp.Line(*self.p1, *self.p2, self.aperture.equivalent_width, polarity_dark=self.polarity_dark)
+ def to_primitives(self, unit=None):
+ conv = self.converted(unit)
+ yield gp.Line(*conv.p1, *conv.p2, self.aperture.equivalent_width(unit), polarity_dark=self.polarity_dark)
def to_statements(self, gs):
yield from gs.set_polarity(self.polarity_dark)
@@ -134,32 +177,33 @@ class Line(GerberObject):
@dataclass
class Drill(GerberObject):
- x : float
- y : float
- diameter : float
+ x : Length(float)
+ y : Length(float)
+ diameter : Length(float)
- def with_offset(self, dx, dy):
+ def _with_offset(self, dx, dy):
return replace(self, x=self.x+dx, y=self.y+dy)
- def rotate(self, angle, cx=0, cy=0):
+ def _rotate(self, angle, cx=0, cy=0):
self.x, self.y = gp.rotate_point(self.x, self.y, angle, cx, cy)
- def to_primitives(self):
- yield gp.Circle(self.x, self.y, self.diameter/2)
+ def to_primitives(self, unit=None):
+ conv = self.converted(unit)
+ yield gp.Circle(conv.x, conv.y, conv.diameter/2)
@dataclass
class Slot(GerberObject):
- x1 : float
- y1 : float
- x2 : float
- y2 : float
- width : float
+ x1 : Length(float)
+ y1 : Length(float)
+ x2 : Length(float)
+ y2 : Length(float)
+ width : Length(float)
- def with_offset(self, dx, dy):
+ def _with_offset(self, dx, dy):
return replace(self, x1=self.x1+dx, y1=self.y1+dy, x2=self.x2+dx, y2=self.y2+dy)
- def rotate(self, rotation, cx=0, cy=0):
+ def _rotate(self, rotation, cx=0, cy=0):
if cx is None:
cx = (self.x1 + self.x2) / 2
cy = (self.y1 + self.y2) / 2
@@ -174,22 +218,23 @@ class Slot(GerberObject):
def p2(self):
return self.x2, self.y2
- def to_primitives(self):
- yield gp.Line(*self.p1, *self.p2, self.width, polarity_dark=self.polarity_dark)
+ def to_primitives(self, unit=None):
+ conv = self.converted(unit)
+ yield gp.Line(*conv.p1, *conv.p2, conv.width, polarity_dark=self.polarity_dark)
@dataclass
class Arc(GerberObject):
- x1 : float
- y1 : float
- x2 : float
- y2 : float
- cx : float
- cy : float
- flipped : bool
+ x1 : Length(float)
+ y1 : Length(float)
+ x2 : Length(float)
+ y2 : Length(float)
+ cx : Length(float)
+ cy : Length(float)
+ clockwise : bool
aperture : object
- def with_offset(self, dx, dy):
+ def _with_offset(self, dx, dy):
return replace(self, x1=self.x1+dx, y1=self.y1+dy, x2=self.x2+dx, y2=self.y2+dy)
@property
@@ -204,15 +249,16 @@ class Arc(GerberObject):
def center(self):
return self.cx + self.x1, self.cy + self.y1
- def rotate(self, rotation, cx=0, cy=0):
+ def _rotate(self, rotation, cx=0, cy=0):
# rotate center first since we need old x1, y1 here
new_cx, new_cy = gp.rotate_point(*self.center, rotation, cx, cy)
self.x1, self.y1 = gp.rotate_point(self.x1, self.y1, rotation, cx, cy)
self.x2, self.y2 = gp.rotate_point(self.x2, self.y2, rotation, cx, cy)
self.cx, self.cy = new_cx - self.x1, new_cy - self.y1
- def to_primitives(self):
- yield gp.Arc(*astuple(self)[:7], width=self.aperture.equivalent_width, polarity_dark=self.polarity_dark)
+ def to_primitives(self, unit=None):
+ conv = self.converted(unit)
+ yield gp.Arc(*astuple(conv)[:7], width=self.aperture.equivalent_width(unit), polarity_dark=self.polarity_dark)
def to_statements(self, gs):
yield from gs.set_polarity(self.polarity_dark)
diff --git a/gerbonara/gerber/graphic_primitives.py b/gerbonara/gerber/graphic_primitives.py
index 966cac1..3052322 100644
--- a/gerbonara/gerber/graphic_primitives.py
+++ b/gerbonara/gerber/graphic_primitives.py
@@ -10,7 +10,6 @@ from .gerber_statements import *
class GraphicPrimitive:
_ : KW_ONLY
polarity_dark : bool = True
- unit : str = None
def rotate_point(x, y, angle, cx=0, cy=0):
@@ -19,6 +18,26 @@ def rotate_point(x, y, angle, cx=0, cy=0):
return (cx + (x - cx) * math.cos(-angle) - (y - cy) * math.sin(-angle),
cy + (x - cx) * math.sin(-angle) + (y - cy) * math.cos(-angle))
+def min_none(a, b):
+ if a is None:
+ return b
+ if b is None:
+ return a
+ return min(a, b)
+
+def max_none(a, b):
+ if a is None:
+ return b
+ if b is None:
+ return a
+ return max(a, b)
+
+def add_bounds(b1, b2):
+ (min_x_1, min_y_1), (max_x_1, max_y_1) = b1
+ (min_x_2, min_y_2), (max_x_2, max_y_2) = b2
+ min_x, min_y = min_none(min_x_1, min_x_2), min_none(min_y_1, min_y_2)
+ max_x, max_y = max_none(max_x_1, max_x_2), max_none(max_y_1, max_y_2)
+ return ((min_x, min_y), (max_x, max_y))
@dataclass
class Circle(GraphicPrimitive):
@@ -26,9 +45,12 @@ class Circle(GraphicPrimitive):
y : float
r : float # Here, we use radius as common in modern computer graphics, not diameter as gerber uses.
- def bounds(self):
+ def bounding_box(self):
return ((self.x-self.r, self.y-self.r), (self.x+self.r, self.y+self.r))
+ def to_svg(self):
+ return 'circle', (), dict(cx=x, cy=y, r=r)
+
@dataclass
class Obround(GraphicPrimitive):
@@ -38,30 +60,121 @@ class Obround(GraphicPrimitive):
h : float
rotation : float # radians!
- def decompose(self):
- ''' decompose obround to two circles and one rectangle '''
-
- cx = self.x + self.w/2
- cy = self.y + self.h/2
-
+ def to_line(self):
if self.w > self.h:
- x = self.x + self.h/2
- yield Circle(x, cy, self.h/2)
- yield Circle(x + self.w, cy, self.h/2)
- yield Rectangle(x, self.y, self.w - self.h, self.h)
+ w, a, b = self.h, self.w, 0
+ else:
+ w, a, b = self.w, 0, self.h
+ return Line(
+ *rotate_point(self.x-a/2, self.y-b/2, self.rotation, self.x, self.y),
+ *rotate_point(self.x+a/2, self.y+b/2, self.rotation, self.x, self.y),
+ w)
+
+ def bounding_box(self):
+ return self.to_line().bounding_box()
+
+ def to_svg(self):
+ return self.to_line().to_svg()
+
+
+def arc_bounds(x1, y1, x2, y2, cx, cy, clockwise):
+ # This is one of these problems typical for computer geometry where out of nowhere a seemingly simple task just
+ # happens to be anything but in practice.
+ #
+ # Online there are a number of algorithms to be found solving this problem. Often, they solve the more general
+ # problem for elliptic arcs. We can keep things simple here since we only have circular arcs.
+ #
+ # This solution manages to handle circular arcs given in gerber format (with explicit center and endpoints, plus
+ # sweep direction instead of a format with e.g. angles and radius) without any trigonometric functions (e.g. atan2).
+
+ # Center arc on cx, cy
+ x1 -= cx
+ x2 -= cx
+ y1 -= cy
+ y2 -= cy
+ clockwise = bool(clockwise) # bool'ify for XOR/XNOR below
+
+ # Calculate radius
+ r = math.sqrt(x1**2 + y1**2)
+
+ # Calculate in which half-planes (north/south, west/east) P1 and P2 lie.
+ # Note that we assume the y axis points upwards, as in Gerber and maths.
+ # SVG has its y axis pointing downwards.
+ p1_west = x1 < 0
+ p1_north = y1 > 0
+ p2_west = x2 < 0
+ p2_north = y2 > 0
+
+ # Calculate bounding box of P1 and P2
+ min_x = min(x1, x2)
+ min_y = min(y1, y2)
+ max_x = max(x1, x2)
+ max_y = max(y1, y2)
+
+ # North
+ # ^
+ # |
+ # |(0,0)
+ # West <-----X-----> East
+ # |
+ # +Y |
+ # ^ v
+ # | South
+ # |
+ # +-----> +X
+ #
+ # Check whether the arc sweeps over any coordinate axes. If it does, add the intersection point to the bounding box.
+ # Note that, since this intersection point is at radius r, it has coordinate e.g. (0, r) for the north intersection.
+ # Since we know that the points lie on either side of the coordinate axis, the '0' coordinate of the intersection
+ # point will not change the bounding box in that axis--only its 'r' coordinate matters. We also know that the
+ # absolute value of that coordinate will be greater than or equal to the old coordinate in that direction since the
+ # intersection with the axis is the point where the full circle is tangent to the AABB. Thus, we can blindly set the
+ # corresponding coordinate of the bounding box without min()/max()'ing first.
+
+ # Handle north/south halfplanes
+ if p1_west != p2_west: # arc starts in west half-plane, ends in east half-plane
+ if p1_west == clockwise: # arc is clockwise west -> east or counter-clockwise east -> west
+ max_y = r # add north to bounding box
+ else: # arc is counter-clockwise west -> east or clockwise east -> west
+ min_y = -r # south
+ else: # Arc starts and ends in same halfplane west/east
+ # Since both points are on the arc (at same radius) in one halfplane, we can use the y coord as a proxy for
+ # angle comparisons.
+ small_arc_is_north_to_south = y1 > y2
+ small_arc_is_clockwise = small_arc_is_north_to_south == p1_west
+ if small_arc_is_clockwise != clockwise:
+ min_y, max_y = -r, r # intersect aabb with both north and south
+
+ # Handle west/east halfplanes
+ if p1_north != p2_north:
+ if p1_north == clockwise:
+ max_x = r # east
+ else:
+ min_x = -r # west
+ else:
+ small_arc_is_west_to_east = x1 < x2
+ small_arc_is_clockwise = small_arc_is_west_to_east == p1_north
+ if small_arc_is_clockwise != clockwise:
+ min_x, max_x = -r, r # intersect aabb with both north and south
- elif self.h > self.w:
- y = self.y + self.w/2
- yield Circle(cx, y, self.w/2)
- yield Circle(cx, y + self.h, self.w/2)
- yield Rectangle(self.x, y, self.w, self.h - self.w)
+ return (min_x+cx, min_y+cy), (max_x+cx, max_y+cy)
- else:
- yield Circle(cx, cy, self.w/2)
- def bounds(self):
- return ((self.x-self.w/2, self.y-self.h/2), (self.x+self.w/2, self.y+self.h/2))
+def point_distance(a, b):
+ return math.sqrt((b[0] - a[0])**2 + (b[1] - a[1])**2)
+def point_line_distance(l1, l2, p):
+ x1, y1 = l1
+ x2, y2 = l2
+ x0, y0 = p
+ return abs((x2-x1)*(y1-y0) - (x1-x0)*(y2-y1))/point_distance(l1, l2)
+
+def svg_arc(old, new, center, clockwise):
+ r = point_distance(old, new)
+ d = point_line_distance(old, new, center)
+ sweep_flag = int(clockwise)
+ large_arc = int((d > 0) == clockwise) # FIXME check signs
+ return f'A {r:.6} {r:.6} {large_arc} {sweep_flag} {new[0]:.6} {new[1]:.6}'
@dataclass
class ArcPoly(GraphicPrimitive):
@@ -72,15 +185,23 @@ class ArcPoly(GraphicPrimitive):
outline : [(float,)]
# list of radii of segments, must be either None (all segments are straight lines) or same length as outline.
# Straight line segments have None entry.
- arc_centers : [(float,)]
+ arc_centers : [(float,)] = None
@property
def segments(self):
- return itertools.zip_longest(self.outline[:-1], self.outline[1:], self.radii or [])
+ ol = self.outline
+ return itertools.zip_longest(ol, ol[1:] + [ol[0]], self.arc_centers)
+
+ def bounding_box(self):
+ bbox = (None, None), (None, None)
+ for (x1, y1), (x2, y2), arc in self.segments:
+ if arc:
+ clockwise, center = arc
+ bbox = add_bounds(bbox, arc_bounds(x1, y1, x2, y2, *center, clockwise))
- def bounds(self):
- for (x1, y1), (x2, y2), radius in self.segments:
- return
+ else:
+ line_bounds = (min(x1, x2), min(y1, y2)), (max(x1, x2), max(y1, y2))
+ bbox = add_bounds(bbox, line_bounds)
def __len__(self):
return len(self.outline)
@@ -88,6 +209,21 @@ class ArcPoly(GraphicPrimitive):
def __bool__(self):
return bool(len(self))
+ def _path_d(self):
+ if len(self.outline) == 0:
+ return
+
+ yield f'M {outline[0][0]:.6}, {outline[0][1]:.6}'
+ for old, new, arc in self.segments:
+ if not arc:
+ yield f'L {new[0]:.6} {new[1]:.6}'
+ else:
+ clockwise, center = arc
+ yield svg_arc(old, new, center, clockwise)
+
+ def to_svg(self):
+ return 'path', [], {'d': ' '.join(self._path_d())}
+
@dataclass
class Line(GraphicPrimitive):
@@ -97,7 +233,14 @@ class Line(GraphicPrimitive):
y2 : float
width : float
- # FIXME bounds
+ def bounding_box(self):
+ r = self.width / 2
+ return add_bounds(Circle(self.x1, self.y1, r).bounding_box(), Circle(self.x2, self.y2, r).bounding_box())
+
+ def to_svg(self):
+ return 'path', [], dict(
+ d=f'M {self.x1:.6} {self.y1:.6} L {self.x2:.6} {self.y2:.6}',
+ style=f'stroke-width: {self.width:.6}; stroke-linecap: round')
@dataclass
class Arc(GraphicPrimitive):
@@ -107,10 +250,36 @@ class Arc(GraphicPrimitive):
y2 : float
cx : float
cy : float
- flipped : bool
+ clockwise : bool
width : float
- # FIXME bounds
+ def bounding_box(self):
+ r = self.w/2
+ endpoints = add_bounds(Circle(self.x1, self.y1, r).bounding_box(), Circle(self.x2, self.y2, r).bounding_box())
+
+ arc_r = point_distance((self.cx, self.cy), (self.x1, self.y1))
+
+ # extend C -> P1 line by line width / 2 along radius
+ dx, dy = self.x1 - self.cx, self.y1 - self.cy
+ x1 = self.x1 + dx/arc_r * r
+ y1 = self.y1 + dy/arc_r * r
+
+ # same for C -> P2
+ dx, dy = self.x2 - self.cx, self.y2 - self.cy
+ x2 = self.x2 + dx/arc_r * r
+ y2 = self.y2 + dy/arc_r * r
+
+ arc = arc_bounds(x1, y1, x2, y2, cx, cy, self.clockwise)
+ return add_bounds(endpoints, arc) # FIXME add "include_center" switch
+
+ def to_svg(self):
+ arc = svg_arc((self.x1, self.y1), (self.x2, self.y2), (self.cx, self.cy), self.clockwise)
+ return 'path', [], dict(
+ d=f'M {self.x1:.6} {self.y1:.6} {arc}',
+ style=f'stroke-width: {self.width:.6}; stroke-linecap: round')
+
+def svg_rotation(angle_rad):
+ return f'rotation({angle_rad/math.pi*180:.4})'
@dataclass
class Rectangle(GraphicPrimitive):
@@ -121,13 +290,29 @@ class Rectangle(GraphicPrimitive):
h : float
rotation : float # radians, around center!
- def bounds(self):
- return ((self.x, self.y), (self.x+self.w, self.y+self.h))
+ def bounding_box(self):
+ return self.to_arc_poly().bounding_box()
+
+ def to_arc_poly(self):
+ sin, cos = math.sin(self.rotation), math.cos(self.rotation)
+ sw, cw = sin*self.w/2, cos*self.w/2
+ sh, ch = sin*self.h/2, cos*self.h/2
+ x, y = self.x, self.y
+ return ArcPoly([
+ (x - (cw+sh), y - (ch+sw)),
+ (x - (cw+sh), y + (ch+sw)),
+ (x + (cw+sh), y + (ch+sw)),
+ (x + (cw+sh), y - (ch+sw)),
+ ])
@property
def center(self):
return self.x + self.w/2, self.y + self.h/2
+ def to_svg(self):
+ x, y = self.x - self.w/2, self.y - self.h/2
+ return 'rect', [], dict(x=x, y=y, w=self.w, h=self.h, transform=svg_rotation(self.rotation))
+
class RegularPolygon(GraphicPrimitive):
x : float
@@ -136,13 +321,19 @@ class RegularPolygon(GraphicPrimitive):
n : int
rotation : float # radians!
- def decompose(self):
- ''' convert n-sided gerber polygon to normal Region defined by outline '''
+ def to_arc_poly(self):
+ ''' convert n-sided gerber polygon to normal ArcPoly defined by outline '''
delta = 2*math.pi / self.n
- yield Region([
+ return ArcPoly([
(self.x + math.cos(self.rotation + i*delta) * self.r,
self.y + math.sin(self.rotation + i*delta) * self.r)
for i in range(self.n) ])
+ def bounding_box(self):
+ return self.to_arc_poly().bounding_box()
+
+ def to_svg(self):
+ return self.to_arc_poly().to_svg()
+
diff --git a/gerbonara/gerber/rs274x.py b/gerbonara/gerber/rs274x.py
index 38dfe06..f53c78a 100644
--- a/gerbonara/gerber/rs274x.py
+++ b/gerbonara/gerber/rs274x.py
@@ -59,6 +59,18 @@ def points_close(a, b):
else:
return math.isclose(a[0], b[0]) and math.isclose(a[1], b[1])
+def Tag:
+ def __init__(self, name, children=None, **attrs):
+ self.name, self.children, self.attrs = name, children, attrs
+
+ def __str__(self):
+ opening = ' '.join([self.name] + [f'{key}="{value}"' for key, value in self.attrs.items()])
+ if self.children:
+ children = '\n'.join(textwrap.indent(str(c), ' ') for c in children)
+ return f'<{opening}>\n{children}\n</{self.name}>'
+ else:
+ return f'<{opening}/>'
+
class GerberFile(CamFile):
""" A class representing a single gerber file
@@ -71,6 +83,27 @@ class GerberFile(CamFile):
self.comments = []
self.objects = []
+ def to_svg(self, tag=Tag, margin=0, margin_unit='mm', svg_unit='mm'):
+
+ (min_x, min_y), (max_x, max_y) = self.bounding_box(svg_unit)
+
+ if margin:
+ margin = convert(margin, margin_unit, svg_unit)
+ min_x -= margin
+ min_y -= margin
+ max_x += margin
+ max_y += margin
+
+ w, h = max_x - min_x, max_y - min_y
+
+ primitives = [
+ [ tag(*prim.to_svg()) for prim in obj.to_primitives(unit=svg_unit) ]
+ for obj in self.objects ]
+
+ # FIXME setup viewport transform flipping y axis
+
+ return tag('svg', [defs, *primitives], width=w, height=h, viewBox=f'{min_x} {min_y} {w} {h}')
+
def merge(self, other):
""" Merge other GerberFile into this one """
self.comments += other.comments
@@ -158,8 +191,8 @@ class GerberFile(CamFile):
return (x1 - x0, y1 - y0)
@property
- def bounding_box(self):
- bounds = [ p.bounding_box for p in self.pDeprecatedrimitives ]
+ def bounding_box(self, unit='mm'):
+ bounds = [ p.bounding_box(unit) for p in self.objects ]
min_x = min(x0 for (x0, y0), (x1, y1) in bounds)
min_y = min(y0 for (x0, y0), (x1, y1) in bounds)
@@ -227,27 +260,14 @@ class GerberFile(CamFile):
def offset(self, dx=0, dy=0, unit='mm'):
# TODO round offset to file resolution
- dx, dy = self.convert_length(dx, unit), self.convert_length(dy, unit)
#print(f'offset {dx},{dy} file unit')
#for obj in self.objects:
# print(' ', obj)
- self.objects = [ obj.with_offset(dx, dy) for obj in self.objects ]
+ self.objects = [ obj.with_offset(dx, dy, unit) for obj in self.objects ]
#print('after:')
#for obj in self.objects:
# print(' ', obj)
- def convert_length(self, value, unit='mm'):
- """ Convert length into file unit """
-
- if unit == 'mm':
- if self.unit == 'inch':
- return value / 25.4
- elif unit == 'inch':
- if self.unit == 'mm':
- return value * 25.4
-
- return value
-
def rotate(self, angle:'radian', center=(0,0), unit='mm'):
""" Rotate file contents around given point.
@@ -261,8 +281,6 @@ class GerberFile(CamFile):
if math.isclose(angle % (2*math.pi), 0):
return
- center = self.convert_length(center[0], unit), self.convert_length(center[1], unit)
-
# First, rotate apertures. We do this separately from rotating the individual objects below to rotate each
# aperture exactly once.
for ap in self.apertures:
@@ -273,7 +291,7 @@ class GerberFile(CamFile):
# print(' ', obj)
for obj in self.objects:
- obj.rotate(angle, *center)
+ obj.rotate(angle, *center, unit)
#print('after')
#for obj in self.objects:
@@ -414,9 +432,9 @@ class GraphicsState:
polarity_dark=self.polarity_dark, unit=self.file_settings.unit)
def _create_arc(self, old_point, new_point, control_point, aperture=True):
- direction = 'ccw' if self.interpolation_mode == CircularCCWModeStmt else 'cw'
+ clockwise = self.interpolation_mode == CircularCWModeStmt
return go.Arc(*old_point, *new_point,* self.map_coord(*control_point, relative=True),
- flipped=(direction == 'cw'), aperture=(self.aperture if aperture else None),
+ clockwise=clockwise, aperture=(self.aperture if aperture else None),
polarity_dark=self.polarity_dark, unit=self.file_settings.unit)
def update_point(self, x, y, unit=None):