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Indented plane mesh procgen

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This commit is contained in:
Vojtěch Struhár 2025-02-24 21:38:11 +01:00
parent 2e8c1a5562
commit 1a908d4eff
2 changed files with 69 additions and 20 deletions
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24
levels/test_procedural_portal.tscn
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@ -1,19 +1,24 @@
[gd_scene load_steps=7 format=4 uid="uid://c0ieh1abu1xne"] [gd_scene load_steps=9 format=4 uid="uid://c0ieh1abu1xne"]
[ext_resource type="Texture2D" uid="uid://c8nq55glypfp8" path="res://addons/kenney_prototype_tools/textures/light/texture_07.png" id="1_dn1le"]
[ext_resource type="Script" uid="uid://d2bvvjsibau8c" path="res://addons/simple-portal-system/scripts/portal.gd" id="1_ksg6r"] [ext_resource type="Script" uid="uid://d2bvvjsibau8c" path="res://addons/simple-portal-system/scripts/portal.gd" id="1_ksg6r"]
[ext_resource type="PackedScene" uid="uid://d1dtxvwk86ple" path="res://procedural_mesh_maker.tscn" id="2_4vena"] [ext_resource type="PackedScene" uid="uid://d1dtxvwk86ple" path="res://procedural_mesh_maker.tscn" id="2_4vena"]
[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_dn1le"]
albedo_texture = ExtResource("1_dn1le")
[sub_resource type="ArrayMesh" id="ArrayMesh_4vena"] [sub_resource type="ArrayMesh" id="ArrayMesh_4vena"]
_surfaces = [{ _surfaces = [{
"aabb": AABB(-0.75, 0, 0, 1.5, 2.25, 1e-05), "aabb": AABB(-1, -1.3, -0.1, 2, 2.6, 0.1),
"attribute_data": PackedByteArray("AAAAAAAAAAAAAIA/AAAAAAAAAAAAAIA/AACAPwAAgD8="), "attribute_data": PackedByteArray("AAAAAAAAAAAAAIA/AAAAAAAAAAAAAIA/AACAPwAAgD/NzMw9zczMPWZmZj/NzMw9zczMPWZmZj9mZmY/ZmZmPw=="),
"format": 34359742487, "format": 34359742487,
"index_count": 6, "index_count": 30,
"index_data": PackedByteArray("AAABAAIAAQADAAIA"), "index_data": PackedByteArray("AAABAAQABAABAAUAAQADAAUABQADAAcAAwACAAcABwACAAYAAgAAAAYABgAAAAQABAAFAAYABgAFAAcA"),
"material": SubResource("StandardMaterial3D_dn1le"),
"primitive": 3, "primitive": 3,
"uv_scale": Vector4(0, 0, 0, 0), "uv_scale": Vector4(0, 0, 0, 0),
"vertex_count": 4, "vertex_count": 8,
"vertex_data": PackedByteArray("AABAvwAAEEAAAAAAAABAPwAAEEAAAAAAAABAvwAAAAAAAAAAAABAPwAAAAAAAAAA/3//f/9/AID/f/9//38AgP9//3//fwCA/3//f/9/AIA=") "vertex_data": PackedByteArray("AACAv2Zmpj8AAAAAAACAP2Zmpj8AAAAAAACAv2Zmpr8AAAAAAACAP2Zmpr8AAAAAZmZmv5mZmT/NzMy9ZmZmP5mZmT/NzMy9ZmZmv5mZmb/NzMy9ZmZmP5mZmb/NzMy9/3//f/9/AID/f/9//38AgP9//3//fwCA/3//f/9/AID/f/9//38AgP9//3//fwCA/3//f/9/AID/f/9//38AgA==")
}] }]
[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_82kw5"] [sub_resource type="StandardMaterial3D" id="StandardMaterial3D_82kw5"]
@ -57,9 +62,8 @@ mesh = SubResource("ArrayMesh_4vena")
script = ExtResource("1_ksg6r") script = ExtResource("1_ksg6r")
[node name="ProceduralMeshMaker" parent="." node_paths=PackedStringArray("portal") instance=ExtResource("2_4vena")] [node name="ProceduralMeshMaker" parent="." node_paths=PackedStringArray("portal") instance=ExtResource("2_4vena")]
height = 2.25 height = 2.6
width = 1.5 width = 2.0
indent = null
portal = NodePath("../MeshInstance3D") portal = NodePath("../MeshInstance3D")
[node name="OmniLight3D" type="OmniLight3D" parent="."] [node name="OmniLight3D" type="OmniLight3D" parent="."]

65
procedural_mesh_maker.gd
View File

@ -4,7 +4,8 @@ extends Node
@export_range(0.1, 10, 0.01) var height: float = 2.0 @export_range(0.1, 10, 0.01) var height: float = 2.0
@export_range(0.1, 10, 0.01) var width: float = 1.0 @export_range(0.1, 10, 0.01) var width: float = 1.0
## Player camera's NEAR clip distance ## Player camera's NEAR clip distance
@export_range(0, 0.1, 0.001) var indent: float = 0.1 @export_range(0, 0.2, 0.001) var indent: float = 0.1
@export var portal: Portal @export var portal: Portal
func _add_inspector_buttons() -> Array: func _add_inspector_buttons() -> Array:
@ -49,18 +50,62 @@ func generate_portal_mesh() -> void:
var normals = PackedVector3Array() var normals = PackedVector3Array()
var indices = PackedInt32Array() var indices = PackedInt32Array()
var TOP_LEFT = Vector3(-width / 2, height, 0) # Just to save some chars
var TOP_RIGHT = Vector3(width / 2, height, 0) var w = width / 2
var BOTTOM_LEFT = Vector3(-width / 2, 0, 0) var h = height / 2
var BOTTOM_RIGHT = Vector3(width / 2, 0, 0) var i = indent
verts.append_array([TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT]) # Outside rect
uvs.append_array([Vector2(0, 0), Vector2(1, 0), Vector2(0, 1), Vector2(1, 1)]) var TOP_LEFT = Vector3(-w, h, 0)
normals.append_array([Vector3.BACK, Vector3.BACK, Vector3.BACK, Vector3.BACK]) var TOP_RIGHT = Vector3(w, h, 0)
var BOTTOM_LEFT = Vector3(-w, -h, 0)
var BOTTOM_RIGHT = Vector3(w, -h, 0)
# Inside rect, indented
var INDENT_TL = TOP_LEFT + Vector3(indent, -indent, -indent)
var INDENT_TR = TOP_RIGHT + Vector3(-indent, -indent, -indent)
var INDENT_BL = BOTTOM_LEFT + Vector3(indent, indent, -indent)
var INDENT_BR = BOTTOM_RIGHT + Vector3(-indent, indent, -indent)
indices.append_array([0, 1, 2]) # top-left triangle verts.append_array([
indices.append_array([1, 3, 2]) # bottom-right triangle TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT,
INDENT_TL, INDENT_TR, INDENT_BL, INDENT_BR
])
uvs.append_array([
Vector2(0, 0), Vector2(1, 0), Vector2(0, 1), Vector2(1, 1), # Outside UVs
Vector2(i, i), Vector2(1-i, i), Vector2(i, 1-i), Vector2(1-i, 1-i) # Indented UVs
])
# We are going for a flat-surface look here. Portals should be unshaded anyways.
normals.append_array([
Vector3.BACK, Vector3.BACK, Vector3.BACK, Vector3.BACK,
Vector3.BACK, Vector3.BACK, Vector3.BACK, Vector3.BACK
])
# 0 ----------- 1
# | \ / |
# | 4-------5 |
# | | | |
# | | | |
# | 6-------7 |
# | / \ |
# 2 ----------- 3
# Triangles are clockwise!
indices.append_array([
0, 1, 4,
4, 1, 5, # Top section done
1, 3, 5,
5, 3, 7, # right section done
3, 2, 7,
7, 2, 6, # bottom section done
2, 0, 6,
6, 0, 4, # left section done
4, 5, 6,
6, 5, 7 # middle done
])
surface_array[Mesh.ARRAY_VERTEX] = verts surface_array[Mesh.ARRAY_VERTEX] = verts
surface_array[Mesh.ARRAY_TEX_UV] = uvs surface_array[Mesh.ARRAY_TEX_UV] = uvs