I don't think this ever worked correctly.
Code:
lathe_shapes = [
None, # 0
(1,-1), (1,1), (-1,1), (-1,-1), # 1..4
(0,-1), (1,0), (0,1), (-1,0), # 5..8
(0,0) # 9
]
lathe_shapes_back = [
None, # 0
(-1,-1), (-1,1), (1,1), (1,-1), # 1..4
(0,-1), (-1,0), (0,1), (1,0), # 5..8
(0,0) # 9
]
def lathetool(self, current_tool):
glDepthFunc(GL_ALWAYS)
diameter, frontangle, backangle, orientation = current_tool[-4:]
w = 3/8.
if '-X' in self.geometry:
frontangle = 360 - frontangle
backangle = 360 - backangle
radius = self.to_internal_linear_unit(diameter) / 2.
glColor3f(*self.colors['lathetool'])
glBegin(GL_LINES)
glVertex3f(-radius/2.0,0.0,0.0)
glVertex3f(radius/2.0,0.0,0.0)
glVertex3f(0.0,0.0,-radius/2.0)
glVertex3f(0.0,0.0,radius/2.0)
glEnd()
glNormal3f(0,1,0)
if orientation == 9:
glBegin(GL_TRIANGLE_FAN)
for i in range(37):
t = i * math.pi / 18
glVertex3f(radius * math.cos(t), 0.0, radius * math.sin(t))
glEnd()
else:
if '-X' in self.geometry:
dx, dy = self.lathe_shapes_back[orientation]
else:
dx, dy = self.lathe_shapes[orientation]
min_angle = min(backangle, frontangle) * math.pi / 180
max_angle = max(backangle, frontangle) * math.pi / 180
sinmax = math.sin(max_angle)
cosmax = math.cos(max_angle)
tanmax = math.cos(max_angle)
sinmin = math.sin(min_angle)
cosmin = math.cos(min_angle)
tanmin = math.cos(min_angle)
circleminangle = - math.pi/2 + min_angle
circlemaxangle = - 3*math.pi/2 + max_angle
d0 = 0
x1 = (w - d0)
sz = max(w, 3*radius)
glBegin(GL_TRIANGLE_FAN)
glVertex3f(
radius * dx + radius * math.sin(circleminangle) + sz * sinmin,
0,
radius * dy + radius * math.cos(circleminangle) + sz * cosmin)
for i in range(37):
#t = circleminangle + i * (circlemaxangle - circleminangle)/36.
t = circleminangle + i * (circlemaxangle - circleminangle)/36.
glVertex3f(radius*dx + radius * math.sin(t), 0.0, radius*dy + radius * math.cos(t))
glVertex3f(
radius * dx + radius * math.sin(circlemaxangle) + sz * sinmax,
0,
radius * dy + radius * math.cos(circlemaxangle) + sz * cosmax)
glEnd()
glDepthFunc(GL_LESS)
