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 get_window_physical(self, fx, fy, step=False):
""" Convert logical to physical coordinates. """
if self.window:
scalex, scaley, offsetx, offsety = self.window
if step:
fx0, fy0 = self.get_window_logical(*self.last_point)
else:
fx0, fy0 = fp.Single.zero.copy(), fp.Single.zero.copy()
x = fp.add(offsetx, fp.mul(fx0.iadd(fx), scalex)).round_to_int()
y = fp.add(offsety, fp.mul(fy0.iadd(fy), scaley)).round_to_int()
else:
x, y = self.last_point if step else (0, 0)
x += fx.round_to_int()
y += fy.round_to_int()
# overflow check
if x < -0x8000 or y < -0x8000 or x > 0x7fff or y > 0x7fff:
raise error.RunError(error.OVERFLOW)
return x, y
def get_window_physical(self, fx, fy, step=False):
""" Convert logical to physical coordinates. """
if self.window:
scalex, scaley, offsetx, offsety = self.window
if step:
fx0, fy0 = self.get_window_logical(*self.last_point)
else:
fx0, fy0 = fp.Single.zero.copy(), fp.Single.zero.copy()
x = fp.add(offsetx, fp.mul(fx0.iadd(fx), scalex)).round_to_int()
y = fp.add(offsety, fp.mul(fy0.iadd(fy), scaley)).round_to_int()
else:
x, y = self.last_point if step else (0, 0)
x += fx.round_to_int()
y += fy.round_to_int()
# overflow check
if x < -0x8000 or y < -0x8000 or x > 0x7fff or y > 0x7fff:
raise error.RunError(error.OVERFLOW)
return x, y