示例#1
0
/*!
  Updates \a path to be the same path as this path.
*/
void
SoLightPath::makeTempPath(SoTempPath *path) const
{
  const int n = this->indices.getLength();
  SoNode *node = this->headnode;
  path->setHead(node);
  for (int i = 1; i < n; i++) {
    int childidx = this->indices[i];
    // check validity of path, return if invalid
    SoChildList *children = node->getChildren();
    if (children == NULL || childidx < 0 || childidx >= children->getLength()) break;
    node = (*children)[childidx];
    path->append(childidx); // childidx should be ok
  }
}
示例#2
0
/*!
  Returns the indexth node in path.
*/
SoNode *
SoLightPath::getNode(const int index) const
{
#if COIN_DEBUG && 1 // debug
  if (index < 0 || index >= this->indices.getLength()) {
    SoDebugError::postInfo("SoLightPath::getNode",
                           "index %d out of bounds", index);
  }
#endif // debug

  SoNode *node = this->headnode;
  for (int i = 1; i < index; i++) {
    int childidx = this->indices[i];
    SoChildList *children = node->getChildren();
    node = NULL;
    if (children == NULL || childidx < 0 || childidx >= children->getLength()) break;
    node = (*children)[childidx];
  }
  return node;
}