Skip to content

Fix--cdpQuadtree does not work correctly on a large number of points … #391

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
marktech0813 wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Fix--cdpQuadtree does not work correctly on a large number of points … #391

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 5 additions & 4 deletions Samples/3_CUDA_Features/cdpQuadtree/cdpQuadtree.cu
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -502,11 +502,12 @@ __global__ void build_quadtree_kernel(Quadtree_node *nodes, Points *points, Para
if (!(params.depth >= params.max_depth || num_points <= params.min_points_per_node)) {
// The last thread launches new blocks.
if (threadIdx.x == NUM_THREADS_PER_BLOCK - 1) {
// The children.
Quadtree_node *children = &nodes[params.num_nodes_at_this_level - (node.id() & ~3)];
// The children. Move to the next-level slice relative to this 4-node group,
// and select the 4-children group of this node (local index within its parent).
Quadtree_node *children = &nodes[params.num_nodes_at_this_level];

// The offsets of the children at their level.
int child_offset = 4 * node.id();
// The offset of this node's 4 children within the next-level slice (local to group).
int child_offset = 4 * (node.id() & 3);

// Set IDs.
children[child_offset + 0].set_id(4 * node.id() + 0);
Expand Down