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Add triangulation partition option to 2D navigation mesh baking

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Adds triangulation partition option to 2D navigation mesh baking as an alternative to the existing convex partition option.
This commit is contained in:
smix8 2024-05-30 15:01:57 +02:00
parent 3978628c6c
commit 110b2dc61a
4 changed files with 66 additions and 4 deletions
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12
doc/classes/NavigationPolygon.xml
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@ -193,6 +193,9 @@
<member name="parsed_geometry_type" type="int" setter="set_parsed_geometry_type" getter="get_parsed_geometry_type" enum="NavigationPolygon.ParsedGeometryType" default="2">
Determines which type of nodes will be parsed as geometry. See [enum ParsedGeometryType] for possible values.
</member>
<member name="sample_partition_type" type="int" setter="set_sample_partition_type" getter="get_sample_partition_type" enum="NavigationPolygon.SamplePartitionType" default="0">
Partitioning algorithm for creating the navigation mesh polys. See [enum SamplePartitionType] for possible values.
</member>
<member name="source_geometry_group_name" type="StringName" setter="set_source_geometry_group_name" getter="get_source_geometry_group_name" default="&amp;&quot;navigation_polygon_source_geometry_group&quot;">
The group name of nodes that should be parsed for baking source geometry.
Only used when [member source_geometry_mode] is [constant SOURCE_GEOMETRY_GROUPS_WITH_CHILDREN] or [constant SOURCE_GEOMETRY_GROUPS_EXPLICIT].
@ -202,6 +205,15 @@
</member>
</members>
<constants>
<constant name="SAMPLE_PARTITION_CONVEX_PARTITION" value="0" enum="SamplePartitionType">
Convex partitioning that yields navigation mesh with convex polygons.
</constant>
<constant name="SAMPLE_PARTITION_TRIANGULATE" value="1" enum="SamplePartitionType">
Triangulation partitioning that yields navigation mesh with triangle polygons.
</constant>
<constant name="SAMPLE_PARTITION_MAX" value="2" enum="SamplePartitionType">
Represents the size of the [enum SamplePartitionType] enum.
</constant>
<constant name="PARSED_GEOMETRY_MESH_INSTANCES" value="0" enum="ParsedGeometryType">
Parses mesh instances as obstruction geometry. This includes [Polygon2D], [MeshInstance2D], [MultiMeshInstance2D], and [TileMap] nodes.
Meshes are only parsed when they use a 2D vertices surface format.

30
modules/navigation/2d/nav_mesh_generator_2d.cpp
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@ -1042,10 +1042,32 @@ void NavMeshGenerator2D::generator_bake_from_source_geometry_data(Ref<Navigation
}
TPPLPartition tpart;
if (tpart.ConvexPartition_HM(&tppl_in_polygon, &tppl_out_polygon) == 0) { //failed!
ERR_PRINT("NavigationPolygon Convex partition failed. Unable to create a valid NavigationMesh from defined polygon outline paths.");
p_navigation_mesh->clear();
return;
NavigationPolygon::SamplePartitionType sample_partition_type = p_navigation_mesh->get_sample_partition_type();
switch (sample_partition_type) {
case NavigationPolygon::SamplePartitionType::SAMPLE_PARTITION_CONVEX_PARTITION:
if (tpart.ConvexPartition_HM(&tppl_in_polygon, &tppl_out_polygon) == 0) {
ERR_PRINT("NavigationPolygon polygon convex partition failed. Unable to create a valid navigation mesh polygon layout from provided source geometry.");
p_navigation_mesh->set_vertices(Vector<Vector2>());
p_navigation_mesh->clear_polygons();
return;
}
break;
case NavigationPolygon::SamplePartitionType::SAMPLE_PARTITION_TRIANGULATE:
if (tpart.Triangulate_EC(&tppl_in_polygon, &tppl_out_polygon) == 0) {
ERR_PRINT("NavigationPolygon polygon triangulation failed. Unable to create a valid navigation mesh polygon layout from provided source geometry.");
p_navigation_mesh->set_vertices(Vector<Vector2>());
p_navigation_mesh->clear_polygons();
return;
}
break;
default: {
ERR_PRINT("NavigationPolygon polygon partitioning failed. Unrecognized partition type.");
p_navigation_mesh->set_vertices(Vector<Vector2>());
p_navigation_mesh->clear_polygons();
return;
}
}
Vector<Vector2> new_vertices;

18
scene/resources/2d/navigation_polygon.cpp
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@ -400,6 +400,15 @@ real_t NavigationPolygon::get_border_size() const {
return border_size;
}
void NavigationPolygon::set_sample_partition_type(SamplePartitionType p_value) {
ERR_FAIL_INDEX(p_value, SAMPLE_PARTITION_MAX);
partition_type = p_value;
}
NavigationPolygon::SamplePartitionType NavigationPolygon::get_sample_partition_type() const {
return partition_type;
}
void NavigationPolygon::set_parsed_geometry_type(ParsedGeometryType p_geometry_type) {
ERR_FAIL_INDEX(p_geometry_type, PARSED_GEOMETRY_MAX);
parsed_geometry_type = p_geometry_type;
@ -514,6 +523,9 @@ void NavigationPolygon::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_border_size", "border_size"), &NavigationPolygon::set_border_size);
ClassDB::bind_method(D_METHOD("get_border_size"), &NavigationPolygon::get_border_size);
ClassDB::bind_method(D_METHOD("set_sample_partition_type", "sample_partition_type"), &NavigationPolygon::set_sample_partition_type);
ClassDB::bind_method(D_METHOD("get_sample_partition_type"), &NavigationPolygon::get_sample_partition_type);
ClassDB::bind_method(D_METHOD("set_parsed_geometry_type", "geometry_type"), &NavigationPolygon::set_parsed_geometry_type);
ClassDB::bind_method(D_METHOD("get_parsed_geometry_type"), &NavigationPolygon::get_parsed_geometry_type);
@ -543,6 +555,8 @@ void NavigationPolygon::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "polygons", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR | PROPERTY_USAGE_INTERNAL), "_set_polygons", "_get_polygons");
ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "outlines", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR | PROPERTY_USAGE_INTERNAL), "_set_outlines", "_get_outlines");
ADD_GROUP("Sampling", "sample_");
ADD_PROPERTY(PropertyInfo(Variant::INT, "sample_partition_type", PROPERTY_HINT_ENUM, "Convex Partition,Triangulate"), "set_sample_partition_type", "get_sample_partition_type");
ADD_GROUP("Geometry", "");
ADD_PROPERTY(PropertyInfo(Variant::INT, "parsed_geometry_type", PROPERTY_HINT_ENUM, "Mesh Instances,Static Colliders,Meshes and Static Colliders"), "set_parsed_geometry_type", "get_parsed_geometry_type");
ADD_PROPERTY(PropertyInfo(Variant::INT, "parsed_collision_mask", PROPERTY_HINT_LAYERS_2D_PHYSICS), "set_parsed_collision_mask", "get_parsed_collision_mask");
@ -559,6 +573,10 @@ void NavigationPolygon::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::RECT2, "baking_rect"), "set_baking_rect", "get_baking_rect");
ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "baking_rect_offset"), "set_baking_rect_offset", "get_baking_rect_offset");
BIND_ENUM_CONSTANT(SAMPLE_PARTITION_CONVEX_PARTITION);
BIND_ENUM_CONSTANT(SAMPLE_PARTITION_TRIANGULATE);
BIND_ENUM_CONSTANT(SAMPLE_PARTITION_MAX);
BIND_ENUM_CONSTANT(PARSED_GEOMETRY_MESH_INSTANCES);
BIND_ENUM_CONSTANT(PARSED_GEOMETRY_STATIC_COLLIDERS);
BIND_ENUM_CONSTANT(PARSED_GEOMETRY_BOTH);

10
scene/resources/2d/navigation_polygon.h
View File

@ -74,6 +74,11 @@ public:
Rect2 _edit_get_rect() const;
bool _edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const;
#endif
enum SamplePartitionType {
SAMPLE_PARTITION_CONVEX_PARTITION = 0,
SAMPLE_PARTITION_TRIANGULATE,
SAMPLE_PARTITION_MAX
};
enum ParsedGeometryType {
PARSED_GEOMETRY_MESH_INSTANCES = 0,
@ -91,6 +96,7 @@ public:
real_t agent_radius = 10.0f;
SamplePartitionType partition_type = SAMPLE_PARTITION_CONVEX_PARTITION;
ParsedGeometryType parsed_geometry_type = PARSED_GEOMETRY_BOTH;
uint32_t parsed_collision_mask = 0xFFFFFFFF;
@ -120,6 +126,9 @@ public:
Vector<int> get_polygon(int p_idx);
void clear_polygons();
void set_sample_partition_type(SamplePartitionType p_value);
SamplePartitionType get_sample_partition_type() const;
void set_parsed_geometry_type(ParsedGeometryType p_geometry_type);
ParsedGeometryType get_parsed_geometry_type() const;
@ -161,6 +170,7 @@ public:
~NavigationPolygon() {}
};
VARIANT_ENUM_CAST(NavigationPolygon::SamplePartitionType);
VARIANT_ENUM_CAST(NavigationPolygon::ParsedGeometryType);
VARIANT_ENUM_CAST(NavigationPolygon::SourceGeometryMode);