christoph/cpp-masssprings
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replace recursive octree implementation with morton code version (FML)

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Christoph Urlacher
2026-03-06 02:20:28 +01:00
parent 9f31d4e6ef
commit c060cfd35d
8 changed files with 427 additions and 200 deletions
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4
src/cpu_spring_system.cpp
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@ -45,7 +45,7 @@ auto cpu_spring_system::add_spring(size_t a, size_t b) -> void
// If the offset moves the mass closer to the current center of mass, flip it
if (!tree.empty()) {
const Vector3 mass_center_direction =
Vector3Subtract(positions[a], tree.nodes[0].mass_center);
Vector3Subtract(positions[a], tree.root().mass_center);
const float mass_center_distance = Vector3Length(mass_center_direction);
if (mass_center_distance > 0 && Vector3DotProduct(offset, mass_center_direction) < 0.0f) {
@ -126,7 +126,7 @@ auto cpu_spring_system::calculate_repulsion_forces(
const auto solve_octree = [&](const int i)
{
const Vector3 force = tree.calculate_force(0, positions[i]);
const Vector3 force = tree.calculate_force_morton(0, positions[i], i);
forces[i] += force;
};