stroke=False, stroke_color=[0, 0, 0, 0.5]):
cr = self.cr
+ # the position of the center of a rectangle at (0,0)
mx = width / 2.0
my = height / 2.0
+ # calculate the position of the bottom-left corner after rotating the
+ # rectangle around the center
rx = cx - (mx * cos(theta) - my * sin(theta))
ry = cy - (mx * sin(theta) + my * cos(theta))
- cr.save()
- cr.translate(rx, ry)
- cr.rotate(theta)
-
- if fill:
- cr.rectangle(0, 0, width, height)
- r, g, b, a = self.color_to_rgba(fill_color)
- cr.set_source_rgba(r, g, b, a)
- cr.fill()
-
- if stroke:
- cr.rectangle(0, 0, width, height)
- r, g, b, a = self.color_to_rgba(stroke_color)
- cr.set_source_rgba(r, g, b, a)
- cr.stroke()
- self.draw_dot(0, 0, 3.0, stroke_color)
-
- cr.restore()
+ self.draw_rect(rx, ry, width, height, theta, fill, fill_color, stroke,
+ stroke_color)
def draw_rect(self, x, y, width, height, theta=0, fill=True, fill_color=[1, 1, 1, 0.8],
stroke=False, stroke_color=[0, 0, 0, 0.5]):
diagram.draw_line(0, y, 400, y, [0, 0, 1, 0.2])
+ diagram.draw_rect(40, 40, 300, 100, stroke=True)
+ diagram.draw_rect(40, 40, 300, 100, pi / 30, stroke=True)
+
+ diagram.draw_rect(40, 250, 300, 100, stroke=True)
+ diagram.draw_rect_from_center(40 + 150, 250 + 50, 300, 100, theta=pi / 40, stroke=True, stroke_color=[1, 0, 0], fill=False)
+
diagram.show()