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Merge pull request #61568 from lawnjelly/merge_node

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[3.x] Add MergeGroup node to simplify merging Meshes at runtime
This commit is contained in:
Rémi Verschelde
2024-02-07 09:49:45 +01:00
parent dc776e46b6 8b79135538
commit e96ebf9218
34 changed files with 4179 additions and 602 deletions
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46
modules/csg/csg_shape.cpp
View File

@ -29,6 +29,8 @@
/**************************************************************************/
#include "csg_shape.h"
#include "scene/3d/mesh_instance.h"
#include "scene/resources/merging_tool.h"
void CSGShape::set_use_collision(bool p_enable) {
if (use_collision == p_enable) {
@ -492,6 +494,50 @@ PoolVector<Vector3> CSGShape::get_brush_faces() {
return faces;
}
bool CSGShape::split_by_surface(Vector<Variant> p_destination_mesh_instances) {
ERR_FAIL_COND_V_MSG(!is_inside_tree(), false, "Source CSGShape must be inside the SceneTree.");
// For simplicity we are requiring that the destination MeshInstances have the same parent
// as the source. This means we can use identical transforms.
Node *parent = get_parent();
ERR_FAIL_NULL_V_MSG(parent, false, "Source CSGShape must have a parent node.");
// Bound function only support variants, so we need to convert to a list of MeshInstances.
Vector<MeshInstance *> mis;
for (int n = 0; n < p_destination_mesh_instances.size(); n++) {
MeshInstance *mi = Object::cast_to<MeshInstance>(p_destination_mesh_instances[n]);
if (mi) {
ERR_FAIL_COND_V_MSG(mi->get_parent() != parent, false, "Destination MeshInstances must be siblings of the source CSGShape.");
mis.push_back(mi);
} else {
ERR_FAIL_V_MSG(false, "Only MeshInstances can be split.");
}
}
force_update_shape();
Array arr = get_meshes();
ERR_FAIL_COND_V(arr.empty(), false);
Ref<ArrayMesh> arr_mesh = arr[1];
ERR_FAIL_COND_V(!arr_mesh.is_valid(), false);
int num_surfaces = arr_mesh->get_surface_count();
ERR_FAIL_COND_V(num_surfaces == 0, false);
ERR_FAIL_COND_V_MSG(mis.size() != num_surfaces, false, "Number of surfaces and number of destination MeshInstances must match.");
CSGBrush *brush = _get_brush();
ERR_FAIL_NULL_V_MSG(brush, false, "Cannot get CSGBrush.");
for (int s = 0; s < num_surfaces; s++) {
MergingTool::split_csg_surface_to_mesh_instance(*this, *mis[s], arr_mesh, brush, s);
}
return true;
}
PoolVector<Face3> CSGShape::get_faces(uint32_t p_usage_flags) const {
return PoolVector<Face3>();
}

4
modules/csg/csg_shape.h
View File

@ -39,6 +39,8 @@
#include "scene/resources/concave_polygon_shape.h"
#include "thirdparty/misc/mikktspace.h"
class MeshInstance;
class CSGShape : public GeometryInstance {
GDCLASS(CSGShape, GeometryInstance);
@ -132,6 +134,8 @@ public:
virtual AABB get_aabb() const;
virtual PoolVector<Face3> get_faces(uint32_t p_usage_flags) const;
bool split_by_surface(Vector<Variant> p_destination_mesh_instances);
void set_use_collision(bool p_enable);
bool is_using_collision() const;