def get_window_logical(self, x, y):
""" Convert physical to logical coordinates. """
x, y = fp.Single.from_int(x), fp.Single.from_int(y)
if self.window:
scalex, scaley, offsetx, offsety = self.window
return (fp.div(fp.sub(x, offsetx), scalex), fp.div(fp.sub(y, offsety), scaley))
else:
return x, y
def get_window_logical(self, x, y):
""" Convert physical to logical coordinates. """
x, y = fp.Single.from_int(x), fp.Single.from_int(y)
if self.window:
scalex, scaley, offsetx, offsety = self.window
return (fp.div(fp.sub(x, offsetx),
scalex), fp.div(fp.sub(y, offsety), scaley))
else:
return x, y
def draw_step(self, x0, y0, sx, sy, plot, goback):
""" Make a DRAW step, drawing a line and reurning if requested. """
scale = self.draw_scale
rotate = self.draw_angle
aspect = self.screen.mode.pixel_aspect
yfac = aspect[1] / (1.*aspect[0])
x1 = (scale*sx) / 4
y1 = (scale*sy) / 4
if rotate == 0 or rotate == 360:
pass
elif rotate == 90:
x1, y1 = int(y1*yfac), -int(x1//yfac)
elif rotate == 180:
x1, y1 = -x1, -y1
elif rotate == 270:
x1, y1 = -int(y1*yfac), int(x1//yfac)
else:
fx, fy = fp.Single.from_int(x1), fp.Single.from_int(y1)
phi = fp.mul(fp.Single.from_int(rotate), deg_to_rad)
sinr, cosr = fp.sin(phi), fp.cos(phi)
fxfac = fp.div(fp.Single.from_int(aspect[0]), fp.Single.from_int(aspect[1]))
fx, fy = fp.add(fp.mul(cosr,fx), fp.div(fp.mul(sinr,fy), fxfac)), fp.mul(fp.sub(fp.mul(cosr,fy), fxfac), fp.mul(sinr,fx))
x1, y1 = fx.round_to_int(), fy.round_to_int()
y1 += y0
x1 += x0
if plot:
self.draw_line(x0, y0, x1, y1, self.last_attr)
self.last_point = x1, y1
if goback:
self.last_point = x0, y0
def draw_step(self, x0, y0, sx, sy, plot, goback):
""" Make a DRAW step, drawing a line and reurning if requested. """
scale = self.draw_scale
rotate = self.draw_angle
aspect = self.screen.mode.pixel_aspect
yfac = aspect[1] / (1. * aspect[0])
x1 = (scale * sx) / 4
y1 = (scale * sy) / 4
if rotate == 0 or rotate == 360:
pass
elif rotate == 90:
x1, y1 = int(y1 * yfac), -int(x1 // yfac)
elif rotate == 180:
x1, y1 = -x1, -y1
elif rotate == 270:
x1, y1 = -int(y1 * yfac), int(x1 // yfac)
else:
fx, fy = fp.Single.from_int(x1), fp.Single.from_int(y1)
phi = fp.mul(fp.Single.from_int(rotate), deg_to_rad)
sinr, cosr = fp.sin(phi), fp.cos(phi)
fxfac = fp.div(fp.Single.from_int(aspect[0]),
fp.Single.from_int(aspect[1]))
fx, fy = fp.add(fp.mul(cosr, fx),
fp.div(fp.mul(sinr, fy), fxfac)), fp.mul(
fp.sub(fp.mul(cosr, fy), fxfac),
fp.mul(sinr, fx))
x1, y1 = fx.round_to_int(), fy.round_to_int()
y1 += y0
x1 += x0
if plot:
self.draw_line(x0, y0, x1, y1, self.last_attr)
self.last_point = x1, y1
if goback:
self.last_point = x0, y0
def set_window(self, fx0, fy0, fx1, fy1, cartesian=True):
""" Set the logical coordinate window (WINDOW). """
if fy0.gt(fy1):
fy0, fy1 = fy1, fy0
if fx0.gt(fx1):
fx0, fx1 = fx1, fx0
if cartesian:
fy0, fy1 = fy1, fy0
left, top, right, bottom = self.get_view()
x0, y0 = fp.Single.zero, fp.Single.zero
x1, y1 = fp.Single.from_int(right-left), fp.Single.from_int(bottom-top)
scalex = fp.div(fp.sub(x1, x0), fp.sub(fx1,fx0))
scaley = fp.div(fp.sub(y1, y0), fp.sub(fy1,fy0))
offsetx = fp.sub(x0, fp.mul(fx0,scalex))
offsety = fp.sub(y0, fp.mul(fy0,scaley))
self.window = scalex, scaley, offsetx, offsety
self.window_bounds = fx0, fy0, fx1, fy1, cartesian
def set_window(self, fx0, fy0, fx1, fy1, cartesian=True):
""" Set the logical coordinate window (WINDOW). """
if fy0.gt(fy1):
fy0, fy1 = fy1, fy0
if fx0.gt(fx1):
fx0, fx1 = fx1, fx0
if cartesian:
fy0, fy1 = fy1, fy0
left, top, right, bottom = self.get_view()
x0, y0 = fp.Single.zero, fp.Single.zero
x1, y1 = fp.Single.from_int(right - left), fp.Single.from_int(bottom -
top)
scalex = fp.div(fp.sub(x1, x0), fp.sub(fx1, fx0))
scaley = fp.div(fp.sub(y1, y0), fp.sub(fy1, fy0))
offsetx = fp.sub(x0, fp.mul(fx0, scalex))
offsety = fp.sub(y0, fp.mul(fy0, scaley))
self.window = scalex, scaley, offsetx, offsety
self.window_bounds = fx0, fy0, fx1, fy1, cartesian
