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Make navmesh rasterization errors more lenient

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Make navmesh rasterization on the navigation regions and map more lenient by starting out with a lower internal cell scale by default and changing the merge error to just warning that can be toggled.
This commit is contained in:
smix8
2025-09-23 22:59:07 +02:00
parent a078895ad2
commit 19df15f1dc
12 changed files with 74 additions and 15 deletions
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modules/navigation_2d/2d/nav_map_builder_2d.cpp
+8 -1
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@@ -37,6 +37,8 @@
#include "nav_map_iteration_2d.h"
#include "nav_region_iteration_2d.h"
#include "core/config/project_settings.h"
using namespace Nav2D;
PointKey NavMapBuilder2D::get_point_key(const Vector2 &p_pos, const Vector2 &p_cell_size) {
@@ -110,6 +112,7 @@ void NavMapBuilder2D::_build_step_find_edge_connection_pairs(NavMapIterationBuil
connection_pairs_map.clear();
connection_pairs_map.reserve(polygon_count);
int free_edges_count = 0; // How many ConnectionPairs have only one Connection.
int edge_merge_error_count = 0;
for (const Ref<NavRegionIteration2D> &region : map_iteration->region_iterations) {
for (const ConnectableEdge &connectable_edge : region->get_external_edges()) {
@@ -138,11 +141,15 @@ void NavMapBuilder2D::_build_step_find_edge_connection_pairs(NavMapIterationBuil
} else {
// The edge is already connected with another edge, skip.
ERR_PRINT_ONCE("Navigation map synchronization error. Attempted to merge a navigation mesh polygon edge with another already-merged edge. This is usually caused by crossing edges, overlapping polygons, or a mismatch of the NavigationMesh / NavigationPolygon baked 'cell_size' and navigation map 'cell_size'. If you're certain none of above is the case, change 'navigation/2d/merge_rasterizer_cell_scale' to 0.001.");
edge_merge_error_count++;
}
}
}
if (edge_merge_error_count > 0 && GLOBAL_GET_CACHED(bool, "navigation/2d/warnings/navmesh_edge_merge_errors")) {
WARN_PRINT("Navigation map synchronization had " + itos(edge_merge_error_count) + " edge error(s).\nMore than 2 edges tried to occupy the same map rasterization space.\nThis causes a logical error in the navigation mesh geometry and is commonly caused by overlap or too densely placed edges.\nConsider baking with a higher 'cell_size', greater geometry margin, and less detailed bake objects to cause fewer edges.\nConsider lowering the 'navigation/2d/merge_rasterizer_cell_scale' in the project settings.\nThis warning can be toggled under 'navigation/2d/warnings/navmesh_edge_merge_errors' in the project settings.");
}
r_build.free_edge_count = free_edges_count;
}