1 files changed, 165 insertions, 0 deletions
diff --git a/gerbonara/gerber/graphic_objects.py b/gerbonara/gerber/graphic_objects.py
new file mode 100644
index 0000000..55d1b9c
--- /dev/null
+++ b/gerbonara/gerber/graphic_objects.py
@@ -0,0 +1,165 @@
+
+import graphic_primitives as gp
+
+class GerberObject:
+    _ : KW_ONLY
+    polarity_dark : bool = True
+
+    def to_primitives(self):
+        raise NotImplementedError()
+
+@dataclass
+class Flash(GerberObject):
+    x : float
+    y : float
+    aperture : object
+
+    def with_offset(self, dx, dy):
+        return replace(self, x=self.x+dx, y=self.y+dy)
+
+    def rotate(self, rotation, cx=None, cy=None):
+        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_statements(self, gs):
+        yield from gs.set_polarity(self.polarity_dark)
+        yield from gs.set_aperture(self.aperture)
+        yield FlashStmt(self.x, self.y)
+
+class Region(GerberObject):
+    def __init__(self, outline=[], arc_centers=None, *, polarity_dark):
+        super().__init__(self, polarity_dark=polarity_dark)
+        self.poly = gp.ArcPoly()
+
+    def with_offset(self, dx, dy):
+        return Region([ (x+dx, y+dy) for x, y in outline ], radii, polarity_dark=self.polarity_dark)
+
+    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(x, y, angle, cx, cy) for x, y in self.poly.arc_centers ]
+
+    def append(self, obj):
+        if not self.outline:
+            self.poly.outline.append(obj.p1)
+        self.poly.outline.append(obj.p2)
+
+        if isinstance(obj, Arc):
+            self.poly.arc_centers.append(obj.center)
+        else:
+            self.poly.arc_centers.append(None)
+
+    def to_primitives(self):
+        self.poly.polarity_dark = polarity_dark
+        yield self.poly
+
+    def to_statements(self, gs):
+        yield RegionStartStmt()
+
+        yield from gs.set_current_point(self.poly.outline[0])
+
+        for point, arc_center in zip(self.poly.outline, self.poly.arc_centers):
+            if arc_center is None:
+                yield from gs.set_interpolation_mode(LinearModeStmt)
+                yield InterpolateStmt(*point)
+
+            else:
+                cx, cy = arc_center
+                x2, y2 = point
+                yield from gs.set_interpolation_mode(CircularCCWModeStmt)
+                yield InterpolateStmt(x2, y2, cx-x2, cy-y2)
+
+        yield RegionEndStmt()
+
+
+class Line(GerberObject):
+    # Line with *round* end caps.
+    x1 : float
+    y1 : float
+    x2 : float
+    y2 : float
+    aperture : object
+
+    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=None, cy=None):
+        if cx is None:
+            cx = (self.x1 + self.x2) / 2
+            cy = (self.y1 + self.y2) / 2
+        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)
+
+    @property
+    def p1(self):
+        return self.x1, self.y1
+
+    @property
+    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_statements(self, gs):
+        yield from gs.set_aperture(self.aperture)
+        yield from gs.set_interpolation_mode(LinearModeStmt)
+        yield from gs.set_current_point(self.p1)
+        yield InterpolateStmt(*self.p2)
+
+
+class Arc(GerberObject):
+    x : float
+    y : float
+    r : float
+    angle1 : float # radians!
+    angle2 : float # radians!
+    aperture : object
+
+    @classmethod
+    def from_coords(kls, start, end, center_delta, aperture, flipped=False, polarity_dark=True):
+        x0, y0 = start
+        x1, y1 = end
+        dx, dy = center_delta
+        cx, cy = x0+dx, y0+dy
+        angle1 = math.atan2(y0-cy, x0-cx)
+        angle2 = math.atan2(y1-cy, x1-cx)
+        aperture = self.aperture
+        if flipped:
+            angle1, angle2 = angle2, angle1
+        r = math.sqrt(dx**2 + dy**2)
+        # r should be approximately (depending on coordinate resolution) equal for center->start and center->end
+        return kls(cx, cy, r, angle1, angle2, polarity_dark=polarity_dark)
+
+    def with_offset(self, dx, dy):
+        return replace(self, x=self.x+dx, y=self.y+dy)
+
+    @property
+    def p1(self):
+        return self.x + self.r*sin(self.angle1), self.y + self.r*cos(self.angle1)
+
+    @property
+    def p2(self):
+        return self.x + self.r*sin(self.angle2), self.y + self.r*cos(self.angle2)
+
+    @property
+    def center(self):
+        return (self.x, self.y)
+
+    def rotate(self, rotation, cx=None, cy=None):
+        self.x, self.y = gp.rotate_point(self.x, self.y, rotation, cx, cy)
+        self.angle1 = (self.angle1+rotation) % (2*math.pi)
+        self.angle2 = (self.angle2+rotation) % (2*math.pi)
+
+    def to_primitives(self):
+        yield gp.Arc(self.x, self.y, self.r, self.angle1, self.angle2, self.aperture.equivalent_width, polarity_dark=self.polarity_dark)
+
+    def to_statements(self, gs):
+        yield from gs.set_aperture(self.aperture)
+        yield from gs.set_interpolation_mode(CircularCCWModeStmt)
+        yield from gs.set_current_point(self.p1)
+        x2, y2 = self.p2
+        yield InterpolateStmt(x2, y2, self.x-x2, self.y-y2)
+
+