Rename gerbonara/gerber package to just gerbonara

1 files changed, 270 insertions, 0 deletions

diff --git a/gerbonara/aperture_macros/primitive.py b/gerbonara/aperture_macros/primitive.py
new file mode 100644
index 0000000..8732520
--- /dev/null
+++ b/gerbonara/aperture_macros/primitive.py
@@ -0,0 +1,270 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright 2019 Hiroshi Murayama <opiopan@gmail.com>
+# Copyright 2022 Jan Götte <gerbonara@jaseg.de>
+
+import warnings
+import contextlib
+import math
+
+from .expression import Expression, UnitExpression, ConstantExpression, expr
+
+from .. import graphic_primitives as gp
+
+
+def point_distance(a, b):
+    x1, y1 = a
+    x2, y2 = b
+    return math.sqrt((x2 - x1)**2 + (y2 - y1)**2)
+
+def deg_to_rad(a):
+    return (a / 180) * math.pi
+
+class Primitive:
+    def __init__(self, unit, args):
+        self.unit = unit
+
+        if len(args) > len(type(self).__annotations__):
+            raise ValueError(f'Too many arguments ({len(args)}) for aperture macro primitive {self.code} ({type(self)})')
+
+        for arg, (name, fieldtype) in zip(args, type(self).__annotations__.items()):
+            arg = expr(arg) # convert int/float to Expression object
+
+            if fieldtype == UnitExpression:
+                setattr(self, name, UnitExpression(arg, unit))
+            else:
+                setattr(self, name, arg)
+
+        for name in type(self).__annotations__:
+            if not hasattr(self, name):
+                raise ValueError(f'Too few arguments ({len(args)}) for aperture macro primitive {self.code} ({type(self)})')
+
+    def to_gerber(self, unit=None):
+        return f'{self.code},' + ','.join(
+                getattr(self, name).to_gerber(unit) for name in type(self).__annotations__)
+
+    def __str__(self):
+        attrs = ','.join(str(getattr(self, name)).strip('<>') for name in type(self).__annotations__)
+        return f'<{type(self).__name__} {attrs}>'
+
+    def __repr__(self):
+        return str(self)
+
+    class Calculator:
+        def __init__(self, instance, variable_binding={}, unit=None):
+            self.instance = instance
+            self.variable_binding = variable_binding
+            self.unit = unit
+
+        def __enter__(self):
+            return self
+
+        def __exit__(self, _type, _value, _traceback):
+            pass
+
+        def __getattr__(self, name):
+            return getattr(self.instance, name).calculate(self.variable_binding, self.unit)
+
+        def __call__(self, expr):
+            return expr.calculate(self.variable_binding, self.unit)
+
+
+class Circle(Primitive):
+    code = 1
+    exposure : Expression
+    diameter : UnitExpression
+    # center x/y
+    x : UnitExpression
+    y : UnitExpression
+    rotation : Expression = None
+
+    def __init__(self, unit, args):
+        super().__init__(unit, args)
+        if self.rotation is None:
+            self.rotation = ConstantExpression(0)
+
+    def to_graphic_primitives(self, offset, rotation, variable_binding={}, unit=None, polarity_dark=True):
+        with self.Calculator(self, variable_binding, unit) as calc:
+            x, y = gp.rotate_point(calc.x, calc.y, deg_to_rad(calc.rotation) + rotation, 0, 0)
+            x, y = x+offset[0], y+offset[1]
+            return [ gp.Circle(x, y, calc.diameter/2, polarity_dark=(bool(calc.exposure) == polarity_dark)) ]
+
+    def dilate(self, offset, unit):
+        self.diameter += UnitExpression(offset, unit)
+
+class VectorLine(Primitive):
+    code = 20
+    exposure : Expression
+    width : UnitExpression
+    start_x : UnitExpression
+    start_y : UnitExpression
+    end_x : UnitExpression
+    end_y : UnitExpression
+    rotation : Expression
+
+    def to_graphic_primitives(self, offset, rotation, variable_binding={}, unit=None, polarity_dark=True):
+        with self.Calculator(self, variable_binding, unit) as calc:
+            center_x = (calc.end_x + calc.start_x) / 2
+            center_y = (calc.end_y + calc.start_y) / 2
+            delta_x = calc.end_x - calc.start_x
+            delta_y = calc.end_y - calc.start_y
+            length = point_distance((calc.start_x, calc.start_y), (calc.end_x, calc.end_y))
+
+            center_x, center_y = center_x+offset[0], center_y+offset[1]
+            rotation += deg_to_rad(calc.rotation) + math.atan2(delta_y, delta_x)
+
+            return [ gp.Rectangle(center_x, center_y, length, calc.width, rotation=rotation,
+                        polarity_dark=(bool(calc.exposure) == polarity_dark)) ]
+
+    def dilate(self, offset, unit):
+        self.width += UnitExpression(2*offset, unit)
+
+
+class CenterLine(Primitive):
+    code = 21
+    exposure : Expression
+    width : UnitExpression
+    height : UnitExpression
+    # center x/y
+    x : UnitExpression
+    y : UnitExpression
+    rotation : Expression
+
+    def to_graphic_primitives(self, offset, rotation, variable_binding={}, unit=None, polarity_dark=True):
+        with self.Calculator(self, variable_binding, unit) as calc:
+            rotation += deg_to_rad(calc.rotation)
+            x, y = gp.rotate_point(calc.x, calc.y, rotation, 0, 0)
+            x, y = x+offset[0], y+offset[1]
+            w, h = calc.width, calc.height
+
+            return [ gp.Rectangle(x, y, w, h, rotation, polarity_dark=(bool(calc.exposure) == polarity_dark)) ]
+
+    def dilate(self, offset, unit):
+        self.width += UnitExpression(2*offset, unit)
+            
+
+class Polygon(Primitive):
+    code = 5
+    exposure : Expression
+    n_vertices : Expression
+    # center x/y
+    x : UnitExpression
+    y : UnitExpression
+    diameter : UnitExpression
+    rotation : Expression
+
+    def to_graphic_primitives(self, offset, rotation, variable_binding={}, unit=None, polarity_dark=True):
+        with self.Calculator(self, variable_binding, unit) as calc:
+            rotation += deg_to_rad(calc.rotation)
+            x, y = gp.rotate_point(calc.x, calc.y, rotation, 0, 0)
+            x, y = x+offset[0], y+offset[1]
+            return [ gp.RegularPolygon(calc.x, calc.y, calc.diameter/2, calc.n_vertices, rotation,
+                        polarity_dark=(bool(calc.exposure) == polarity_dark)) ]
+
+    def dilate(self, offset, unit):
+        self.diameter += UnitExpression(2*offset, unit)
+
+
+class Thermal(Primitive):
+    code = 7
+    exposure : Expression
+    # center x/y
+    x : UnitExpression
+    y : UnitExpression
+    d_outer : UnitExpression
+    d_inner : UnitExpression
+    gap_w : UnitExpression
+    rotation : Expression
+
+    def to_graphic_primitives(self, offset, rotation, variable_binding={}, unit=None, polarity_dark=True):
+        with self.Calculator(self, variable_binding, unit) as calc:
+            rotation += deg_to_rad(calc.rotation)
+            x, y = gp.rotate_point(calc.x, calc.y, rotation, 0, 0)
+            x, y = x+offset[0], y+offset[1]
+
+            dark = (bool(calc.exposure) == polarity_dark)
+
+            return [
+                    gp.Circle(x, y, calc.d_outer/2, polarity_dark=dark),
+                    gp.Circle(x, y, calc.d_inner/2, polarity_dark=not dark),
+                    gp.Rectangle(x, y, d_outer, gap_w, rotation=rotation, polarity_dark=not dark),
+                    gp.Rectangle(x, y, gap_w, d_outer, rotation=rotation, polarity_dark=not dark),
+                    ]
+
+    def dilate(self, offset, unit):
+        # I'd rather print a warning and produce graphically slightly incorrect output in these few cases here than
+        # producing macros that may evaluate to primitives with negative values.
+        warnings.warn('Attempted dilation of macro aperture thermal primitive. This is not supported.')
+
+
+class Outline(Primitive):
+    code = 4
+
+    def __init__(self, unit, args):
+        if len(args) < 11:
+            raise ValueError(f'Invalid aperture macro outline primitive, not enough parameters ({len(args)}).')
+        if len(args) > 5004:
+            raise ValueError(f'Invalid aperture macro outline primitive, too many points ({len(args)//2-2}).')
+
+        self.exposure = args.pop(0)
+
+        # length arg must not contain variables (that would not make sense)
+        length_arg = args.pop(0).calculate()
+
+        if length_arg != len(args)//2-1:
+            raise ValueError(f'Invalid aperture macro outline primitive, given size {length_arg} does not match length of coordinate list({len(args)//2-1}).')
+
+        if len(args) % 2 == 1:
+            self.rotation = args.pop()
+        else:
+            self.rotation = ConstantExpression(0.0)
+
+        if args[0] != args[-2] or args[1] != args[-1]:
+            raise ValueError(f'Invalid aperture macro outline primitive, polygon is not closed {args[2:4], args[-3:-1]}')
+
+        self.coords = [(UnitExpression(x, unit), UnitExpression(y, unit)) for x, y in zip(args[0::2], args[1::2])]
+
+    def __str__(self):
+        return f'<Outline {len(self.coords)} points>'
+
+    def to_gerber(self, unit=None):
+        coords = ','.join(coord.to_gerber(unit) for xy in self.coords for coord in xy)
+        return f'{self.code},{self.exposure.to_gerber()},{len(self.coords)-1},{coords},{self.rotation.to_gerber()}'
+
+    def to_graphic_primitives(self, offset, rotation, variable_binding={}, unit=None, polarity_dark=True):
+        with self.Calculator(self, variable_binding, unit) as calc:
+            rotation += deg_to_rad(calc.rotation)
+            bound_coords = [ gp.rotate_point(calc(x), calc(y), rotation, 0, 0) for x, y in self.coords ]
+            bound_coords = [ (x+offset[0], y+offset[1]) for x, y in bound_coords ]
+            bound_radii = [None] * len(bound_coords)
+            return [gp.ArcPoly(bound_coords, bound_radii, polarity_dark=(bool(calc.exposure) == polarity_dark))]
+
+    def dilate(self, offset, unit):
+        # we would need a whole polygon offset/clipping library here
+        warnings.warn('Attempted dilation of macro aperture outline primitive. This is not supported.')
+
+
+class Comment:
+    code = 0
+
+    def __init__(self, comment):
+        self.comment = comment
+
+    def to_gerber(self, unit=None):
+        return f'0 {self.comment}'
+
+PRIMITIVE_CLASSES = {
+    **{cls.code: cls for cls in [
+        Comment,
+        Circle,
+        VectorLine,
+        CenterLine,
+        Outline,
+        Polygon,
+        Thermal,
+    ]},
+    # alternative codes
+    2: VectorLine,
+}
+