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TriangleMesh
Inherits: RefCounted < Object
Triangle geometry for efficient, physicsless intersection queries.
Description
Creates a bounding volume hierarchy (BVH) tree structure around triangle geometry.
The triangle BVH tree can be used for efficient intersection queries without involving a physics engine.
For example, this can be used in editor tools to select objects with complex shapes based on the mouse cursor position.
Performance: Creating the BVH tree for complex geometry is a slow process and best done in a background thread.
Methods
create_from_faces(faces: PackedVector3Array) |
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get_faces() const |
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intersect_ray(begin: Vector3, dir: Vector3) const |
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intersect_segment(begin: Vector3, end: Vector3) const |
Method Descriptions
bool create_from_faces(faces: PackedVector3Array) 🔗
Creates the BVH tree from an array of faces. Each 3 vertices of the input faces array represent one triangle (face).
Returns true if the tree is successfully built, false otherwise.
PackedVector3Array get_faces() const 🔗
Returns a copy of the geometry faces. Each 3 vertices of the array represent one triangle (face).
Dictionary intersect_ray(begin: Vector3, dir: Vector3) const 🔗
Tests for intersection with a ray starting at begin and facing dir and extending toward infinity.
If an intersection with a triangle happens, returns a Dictionary with the following fields:
position: The position on the intersected triangle.
normal: The normal of the intersected triangle.
face_index: The index of the intersected triangle.
Returns an empty Dictionary if no intersection happens.
See also intersect_segment(), which is similar but uses a finite-length segment.
Dictionary intersect_segment(begin: Vector3, end: Vector3) const 🔗
Tests for intersection with a segment going from begin to end.
If an intersection with a triangle happens returns a Dictionary with the following fields:
position: The position on the intersected triangle.
normal: The normal of the intersected triangle.
face_index: The index of the intersected triangle.
Returns an empty Dictionary if no intersection happens.
See also intersect_ray(), which is similar but uses an infinite-length ray.