def getBoundingBox(self):
"""Get the last-known scenegraph bounding-box"""
from OpenGLContext.scenegraph import boundingvolume
return boundingvolume.AABoundingBox(
center=(0, 0, 0),
size=(20, 20, 20),
)
def boundingVolume(self, mode):
"""Create a bounding-volume object for this node"""
from OpenGLContext.scenegraph import boundingvolume
current = boundingvolume.getCachedVolume(self)
if current:
return current
return boundingvolume.cacheVolume(
self,
boundingvolume.AABoundingBox(size=self.size, ),
((self, 'size'), ),
)
def testExclusion():
"""Test that bounding volumes are properly excluded"""
f = frustum.Frustum( planes = [
utilities.pointNormal2Plane( (0,0,0), (-1,0,0) ), # through origin, facing left
])
v = boundingvolume.AABoundingBox(
center = (-3,0,0),
size = (1,1,1),
)
assert v.visible( f, identity(4,'f'))
v = boundingvolume.AABoundingBox(
center = (3,0,0),
size = (1,1,1),
)
assert not v.visible( f, identity(4,'f'))
# test right at the border of the box...
v = boundingvolume.AABoundingBox(
center = (.5,0,0),
size = (1,1,1),
)
assert v.visible( f, identity(4,'f'))
def boundingVolume(self, mode):
"""Create a bounding-volume object for this node"""
from OpenGLContext.scenegraph import boundingvolume
current = boundingvolume.getCachedVolume(self)
if current:
return current
return boundingvolume.cacheVolume(
self,
boundingvolume.AABoundingBox(
# This vastly overestimates the size!
size=[self.size * 2, self.size * 2, self.size * 2], ),
((self, 'size'), ),
)
def boundingVolume(self, mode=None):
"""Create a bounding-volume object for this node
In this case we use the AABoundingBox, despite
the presence of the bounding sphere implementation.
This is just a preference issue, I'm using
AABoundingBox everywhere else, and want the sphere
to interoperate properly.
"""
current = boundingvolume.getCachedVolume(self)
if current:
return current
radius = self.radius
return boundingvolume.cacheVolume(
self,
boundingvolume.AABoundingBox(size=(radius * 2, self.height,
radius * 2), ),
((self, 'radius'), (self, 'height')),
)