def project3Dto2D(p3list):
v01 = Vector3((p3list[1][0] - p3list[0][0]), (p3list[1][1] - p3list[0][1]), (p3list[1][2] - p3list[0][2]))
v12 = Vector3((p3list[2][0] - p3list[1][0]), (p3list[2][1] - p3list[1][1]), (p3list[2][2] - p3list[1][2]))
vn = pgl.cross(v01, v12)
p2s = []
# cosTheta = A dot B/(|A|*|B|) => if A dot B ==0, then Theta == 90
# if polygon not || y axis, project it to the y=0 plane
if pgl.dot(vn, Vector3(0, 1, 0)) != 0:
for i in range(len(p3list)):
v = p3list[i][0], p3list[i][2]
p2s.append(v)
else:
# if polygon || y axis and z axis (it will perpendicular x axis), project it to the x=0 plane
# if polygon || y axis and x axis (it will perpendicular z axis), project it to the z=0 plane
# if polygon || y axis, not || x and z (it will not perpendicular z and x
# axis), project it to the z=0 plane (or x=0 plane)
if pgl.dot(vn, Vector3(0, 0, 1)) == 0:
for i in range(len(p3list)):
v = p3list[i][1], p3list[i][2]
p2s.append(v)
else:
for i in range(len(p3list)):
v = p3list[i][0], p3list[i][1]
p2s.append(v)
return p2s
def project3Dto2D(p3list):
v01 = Vector3((p3list[1][0] - p3list[0][0]), (p3list[1][1] - p3list[0][1]),
(p3list[1][2] - p3list[0][2]))
v12 = Vector3((p3list[2][0] - p3list[1][0]), (p3list[2][1] - p3list[1][1]),
(p3list[2][2] - p3list[1][2]))
vn = pgl.cross(v01, v12)
p2s = []
# cosTheta = A dot B/(|A|*|B|) => if A dot B ==0, then Theta == 90
# if polygon not || y axis, project it to the y=0 plane
if pgl.dot(vn, Vector3(0, 1, 0)) != 0:
for i in range(len(p3list)):
v = p3list[i][0], p3list[i][2]
p2s.append(v)
else:
# if polygon || y axis and z axis (it will perpendicular x axis), project it to the x=0 plane
# if polygon || y axis and x axis (it will perpendicular z axis), project it to the z=0 plane
# if polygon || y axis, not || x and z (it will not perpendicular z and x
# axis), project it to the z=0 plane (or x=0 plane)
if pgl.dot(vn, Vector3(0, 0, 1)) == 0:
for i in range(len(p3list)):
v = p3list[i][1], p3list[i][2]
p2s.append(v)
else:
for i in range(len(p3list)):
v = p3list[i][0], p3list[i][1]
p2s.append(v)
return p2s
def transform(v,t_edir):
v = (v - m_center)
nval = [ pgl.dot(v,ed) for ed in m_edir]
nv = sum([val * ed for val, ed in zip(nval, t_edir)],pgl.Vector3(0,0,0))
return (nv + p_center)
def transform(v, t_edir):
v = (v - m_center)
nval = [pgl.dot(v, ed) for ed in m_edir]
nv = sum([val * ed for val, ed in zip(nval, t_edir)],
pgl.Vector3(0, 0, 0))
return (nv + p_center)