def intersect (self, orig_v, dir_v, pl):
'''
method performing ray-triangle intersection (Moller-Trumbore algorithm)
@param orig QVector3D
@param dir QVector3D
@return isect_t float or None
'''
e1 = pl[1] - pl[0]
e2 = pl[2] - pl[0]
p = QVector3D.crossProduct (dir_v, e2)
p_dot_e1 = QVector3D.dotProduct (p, e1)
if p_dot_e1 == 0:
return None
inv_p_dot_e1 = 1.0 / p_dot_e1
t = orig_v - pl[0]
isect_u = inv_p_dot_e1 * QVector3D.dotProduct (p, t)
if isect_u<0 or isect_u>1:
return None
q = QVector3D.crossProduct (t, e1)
isect_v = inv_p_dot_e1 * QVector3D.dotProduct (q, dir_v)
if isect_v<0 or isect_u + isect_v>1:
return None
isect_t = inv_p_dot_e1 * QVector3D.dotProduct (e2, q)
return isect_t
def intersect(self, orig_v, dir_v, pl):
'''
method performing ray-triangle intersection (Moller-Trumbore algorithm)
@param orig QVector3D
@param dir QVector3D
@return isect_t float or None
'''
e1 = pl[1] - pl[0]
e2 = pl[2] - pl[0]
p = QVector3D.crossProduct(dir_v, e2)
p_dot_e1 = QVector3D.dotProduct(p, e1)
if p_dot_e1 == 0:
return None
inv_p_dot_e1 = 1.0 / p_dot_e1
t = orig_v - pl[0]
isect_u = inv_p_dot_e1 * QVector3D.dotProduct(p, t)
if isect_u < 0 or isect_u > 1:
return None
q = QVector3D.crossProduct(t, e1)
isect_v = inv_p_dot_e1 * QVector3D.dotProduct(q, dir_v)
if isect_v < 0 or isect_u + isect_v > 1:
return None
isect_t = inv_p_dot_e1 * QVector3D.dotProduct(e2, q)
return isect_t
def displayObjects (self):
glClear (GL_COLOR_BUFFER_BIT)
glEnable (GL_DEPTH_TEST)
glDepthMask (GL_TRUE)
#glEnable (GL_CULL_FACE)
for poly in self.__poly_list:
p0 = poly[0]; p1 = poly[1]; p2 = poly[2]
glBegin (GL_TRIANGLES)
col = .4 + 0.5*QVector3D.dotProduct (poly[3], self.__compo_light_pos)
glColor3f (col, col, col)
glVertex3f (p0.x(), p0.y(), p0.z())
glVertex3f (p1.x(), p1.y(), p1.z())
glVertex3f (p2.x(), p2.y(), p2.z())
glEnd ()
def displayObjects(self):
glClear(GL_COLOR_BUFFER_BIT)
glEnable(GL_DEPTH_TEST)
glDepthMask(GL_TRUE)
#glEnable (GL_CULL_FACE)
for poly in self.__poly_list:
p0 = poly[0]
p1 = poly[1]
p2 = poly[2]
glBegin(GL_TRIANGLES)
col = .4 + 0.5 * QVector3D.dotProduct(poly[3],
self.__compo_light_pos)
glColor3f(col, col, col)
glVertex3f(p0.x(), p0.y(), p0.z())
glVertex3f(p1.x(), p1.y(), p1.z())
glVertex3f(p2.x(), p2.y(), p2.z())
glEnd()
