#godot 4, generate mesh with blend surfaces, example

extends Node3D

#godot 4, generate mesh with blend surfaces, example
func _ready():
	var mesh_instance = MeshInstance3D.new()
	add_child(mesh_instance)

	var mesh = ArrayMesh.new()
	var arrays = []
	arrays.resize(Mesh.ARRAY_MAX)
	arrays[Mesh.ARRAY_VERTEX] = PackedVector3Array([Vector3(1,0,0), Vector3(0,0,0), Vector3(0,1,0)])
	var arrays1 = []
	arrays1.resize(Mesh.ARRAY_MAX)
	arrays1[Mesh.ARRAY_VERTEX] = PackedVector3Array([Vector3(-1,0,0), Vector3(0,0,0), Vector3(0,-1,0)])

	var blend_shape_arrays = []
	blend_shape_arrays.resize(Mesh.ARRAY_MAX)
	blend_shape_arrays[Mesh.ARRAY_VERTEX] = PackedVector3Array([
		Vector3(1, 0.5, 0),
		Vector3(0, 0.5, 0),
		Vector3(0, 1.5, 0)])

	var blend_shape_arrays1 = []
	blend_shape_arrays1.resize(Mesh.ARRAY_MAX)
	blend_shape_arrays1[Mesh.ARRAY_VERTEX] = PackedVector3Array([
		Vector3(1, -0.5, 0),
		Vector3(0, -0.5, 0),
		Vector3(0, -1.5, 0),])

	mesh.add_blend_shape('bs')
	mesh.add_blend_shape('bs1')
	#mesh.add_blend_shape('bs2')

	mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLE_STRIP, arrays, [blend_shape_arrays,blend_shape_arrays1])


	#mesh.add_blend_shape('bs2')
	#mesh.add_blend_shape('bs3')
	mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLE_STRIP, arrays1, [blend_shape_arrays,blend_shape_arrays1])
	mesh_instance.mesh = mesh
	mesh_instance.set("blend_shapes/bs", .5)
	print(mesh.get_blend_shape_count())