 |
Attention | Topic was automatically imported from the old Question2Answer platform. |
 |
Asked By | izhvnter |
Hello guys,
I’ve been trying to get the normals to work for a while but still can’t get it right.
here is the code i wrote:
var a: = Vector3(1, 1, 0)
var b: = Vector3(0, 1, 0)
var c: = Vector3(0, 0, 0)
var d: = Vector3(1, 0, 0)
var e: = Vector3(0, 1, 1)
var f: = Vector3(1, 1, 1)
var g: = Vector3(1, 0, 1)
var h: = Vector3(0, 0, 1)
var arr: = []; arr.resize(Mesh.ARRAY_MAX)
var verts: = PoolVector3Array()
var uvs: = PoolVector2Array()
var normals: = PoolVector3Array()
var indices: = PoolIntArray()
#front
verts += create_verts(a, b, c, d)
uvs += create_uvs()
normals += create_normals(a, b, c, d)
indices += create_indices(0, 1, 2, 3)
#back
verts += create_verts(e, f, g, h)
uvs += create_uvs()
normals += create_normals(e, f, g, h)
indices += create_indices(4, 5, 6, 7)
#right
verts += create_verts(f, a, d, g)
uvs += create_uvs()
normals += create_normals(f, a, d, g)
indices += create_indices(8, 9, 10, 11)
#left
verts += create_verts(b, e, h, c)
uvs += create_uvs()
normals += create_normals(b, e, h, c)
indices += create_indices(12, 13, 14, 15)
#top
verts += create_verts(b, a, f, e)
uvs += create_uvs()
normals += create_normals(b, a, f, e)
indices += create_indices(16, 17, 18, 19)
#bottom
verts += create_verts(d, c, h, g)
uvs += create_uvs()
normals += create_normals(d, c, h, g)
indices += create_indices(20, 21, 22, 23)
arr[Mesh.ARRAY_VERTEX] = verts
arr[Mesh.ARRAY_TEX_UV] = uvs
arr[Mesh.ARRAY_NORMAL] = normals
arr[Mesh.ARRAY_INDEX] = indices
get_mesh().add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, arr)
and here are the functions i made to help me:
func create_verts(v1: Vector3, v2: Vector3, v3: Vector3, v4: Vector3) -> PoolVector3Array:
return PoolVector3Array([v1, v2, v3, v4])
func create_uvs() -> PoolVector2Array:
return PoolVector2Array([Vector2(0, 1), Vector2(1, 1), Vector2(1, 0), Vector2(0, 0)])
func create_normals(v1: Vector3, v2: Vector3, v3: Vector3, v4: Vector3) -> PoolVector3Array:
return PoolVector3Array([((v2 - v1).cross(v3 - v1) + (v4 - v3).cross(v1 - v3)).normalized()])
func create_indices(v1: int, v2: int, v3: int, v4: int) -> PoolIntArray:
return PoolIntArray([v1, v2, v3, v3, v4, v1])
the cube is displayed without applying the normals.
i have also tried just adding the vertices instead of trying to calculate the normal by using the cross product and this happened
