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ceiling texture, stair/alcove handling

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This commit is contained in:
veclav talica 2024-08-02 12:47:06 +03:00
parent 0e6540daf5
commit 6bb89a04fd
2 changed files with 135 additions and 10 deletions
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128
Scripts/Space/SpaceRegion.gd
View File

@ -6,23 +6,30 @@ extends SpaceEntity
class_name SpaceRegion
# TODO: Make evelation and height be against the parent.
@export var elevation: float = 0.0
@export var height: float = 100.0
@export var wall_texture: Texture2D
@export var floor_texture: Texture2D
@export var ceiling_texture: Texture2D
@export var top_texture: Texture2D
var _is_convex_cache: bool
func generate_geometry(space: Space) -> Node3D:
return _generate_geometry(space, true)
return _generate_geometry(space, true, null)
func _process(delta):
if Engine.is_editor_hint():
self.texture = floor_texture
self.texture = top_texture if top_texture else floor_texture
func _generate_geometry(space: Space, looked_from_inside: bool) -> Node3D:
func _generate_geometry(space: Space,
looked_from_inside: bool,
parent_region: SpaceRegion
) -> Node3D:
var geometry := MeshInstance3D.new()
geometry.name = name
geometry.position = Vector3(
@ -32,29 +39,43 @@ func _generate_geometry(space: Space, looked_from_inside: bool) -> Node3D:
)
var mesh := ArrayMesh.new()
mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, _generate_wall_arrays(space, looked_from_inside))
var surface_count: int = 0
mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, _generate_wall_arrays(space, looked_from_inside))
surface_count += 1
var wall_material := StandardMaterial3D.new()
wall_material.albedo_texture = wall_texture
mesh.surface_set_material(0, wall_material)
mesh.surface_set_material(surface_count - 1, wall_material)
if (looked_from_inside):
mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, _generate_floor_arrays(space))
surface_count += 1
var floor_material := StandardMaterial3D.new()
floor_material.albedo_texture = floor_texture
mesh.surface_set_material(1, floor_material)
mesh.surface_set_material(surface_count - 1, floor_material)
mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, _generate_ceiling_arrays(space))
surface_count += 1
var ceiling_material := StandardMaterial3D.new()
ceiling_material.albedo_texture = ceiling_texture
ceiling_material.cull_mode = BaseMaterial3D.CULL_FRONT # todo: Don't require state change
mesh.surface_set_material(2, ceiling_material)
mesh.surface_set_material(surface_count - 1, ceiling_material)
if parent_region and not parent_region._is_convex_cache:
if parent_region.height > height:
mesh.add_surface_from_arrays(Mesh.PRIMITIVE_TRIANGLES, _generate_ceiling_arrays(space))
surface_count += 1
var top_material := StandardMaterial3D.new()
top_material.albedo_texture = top_texture
mesh.surface_set_material(surface_count - 1, top_material)
geometry.mesh = mesh
_is_convex_cache = is_convex()
for child in get_children():
if child is SpaceRegion:
geometry.add_child(child._generate_geometry(space, not looked_from_inside))
geometry.add_child(child._generate_geometry(space, not looked_from_inside, self))
geometry.create_trimesh_collision()
return geometry
@ -156,3 +177,94 @@ func _generate_ceiling_arrays(space: Space) -> Array:
arrays[Mesh.ARRAY_TEX_UV] = uvs
return arrays
## Check whether region polygon forms a convex geometry.
##
## Based on: https://math.stackexchange.com/a/1745427
func is_convex() -> bool:
if self.polygon.size() < 3:
return false
var wSign: float = 0 # First nonzero orientation (positive or negative)
var xSign: float = 0
var xFirstSign: float = 0 # Sign of first nonzero edge vector x
var xFlips: float = 0 # Number of sign changes in x
var ySign: float = 0
var yFirstSign: float = 0 # Sign of first nonzero edge vector y
var yFlips: float = 0 # Number of sign changes in y
var curr: Vector2 = self.polygon[-2] # Second-to-last vertex
var next: Vector2 = self.polygon[-1] # Last vertex
for v in self.polygon: # Each vertex, in order
var prev: Vector2 = curr # Previous vertex
curr = next # Current vertex
next = v # Next vertex
# Previous edge vector ("before"):
var bx: float = curr.x - prev.x
var by: float = curr.y - prev.y
# Next edge vector ("after"):
var ax: float = next.x - curr.x
var ay: float = next.y - curr.y
# Calculate sign flips using the next edge vector ("after"),
# recording the first sign.
if ax > 0:
if xSign == 0:
xFirstSign = +1
elif xSign < 0:
xFlips = xFlips + 1
xSign = +1
elif ax < 0:
if xSign == 0:
xFirstSign = -1
elif xSign > 0:
xFlips = xFlips + 1
xSign = -1
if xFlips > 2:
return false
if ay > 0:
if ySign == 0:
yFirstSign = +1
elif ySign < 0:
yFlips = yFlips + 1
ySign = +1
elif ay < 0:
if ySign == 0:
yFirstSign = -1
elif ySign > 0:
yFlips = yFlips + 1
ySign = -1
if yFlips > 2:
return false
# Find out the orientation of this pair of edges,
# and ensure it does not differ from previous ones.
var w := bx * ay - ax * by
if (wSign == 0) and (w != 0):
wSign = w
elif (wSign > 0) and (w < 0):
return false
elif (wSign < 0) and (w > 0):
return false
# Final/wraparound sign flips:
if (xSign != 0) and (xFirstSign != 0) and (xSign != xFirstSign):
xFlips = xFlips + 1
if (ySign != 0) and (yFirstSign != 0) and (ySign != yFirstSign):
yFlips = yFlips + 1
# Concave polygons have two sign flips along each axis.
if (xFlips != 2) or (yFlips != 2):
return false
# This is a convex polygon.
return true

17
Spaces/Dungeon.tscn
View File

@ -1,4 +1,4 @@
[gd_scene load_steps=7 format=3 uid="uid://deff7lt34nj0h"]
[gd_scene load_steps=8 format=3 uid="uid://deff7lt34nj0h"]
[ext_resource type="Script" path="res://Scripts/Space/Space.gd" id="1_ckp7u"]
[ext_resource type="Script" path="res://Scripts/Space/SpaceRegion.gd" id="2_s3h7s"]
@ -6,6 +6,7 @@
[ext_resource type="Texture2D" uid="uid://icmmuqquxhq3" path="res://Art/Stone_06-128x128.png" id="3_ondo6"]
[ext_resource type="Texture2D" uid="uid://eempmja460l5" path="res://Art/Stone_11-128x128.png" id="4_mnswr"]
[ext_resource type="Script" path="res://Scripts/Space/SpaceSpawn.gd" id="4_rhl23"]
[ext_resource type="Texture2D" uid="uid://buoupwtftxjse" path="res://Art/Stone_05-128x128.png" id="5_evp07"]
[node name="Dungeon" type="Node2D"]
script = ExtResource("1_ckp7u")
@ -24,10 +25,22 @@ ceiling_texture = ExtResource("4_mnswr")
[node name="Column" type="Polygon2D" parent="Room"]
texture_repeat = 2
polygon = PackedVector2Array(8, -40, 48, -64, 88, -24, 64, 0, 24, -8)
texture = ExtResource("3_ondo6")
polygon = PackedVector2Array(8, -40, 48, -64, 88, -40, 72, -8, 72, -32, 48, -48, 24, -32, 24, -8)
uv = PackedVector2Array(1.88, 5.28, 0.6, 1.44, 5.24, 0.64, 5.24, 0.64, 9.94, 3.84, 5.72, 6.56, 5.72, 6.56, 1.88, 5.28, 5.24, 0.64)
script = ExtResource("2_s3h7s")
wall_texture = ExtResource("3_ondo6")
floor_texture = ExtResource("3_ondo6")
[node name="Floor" type="Polygon2D" parent="Room/Column"]
texture_repeat = 2
texture = ExtResource("5_evp07")
polygon = PackedVector2Array(72, -8, 72, -32, 48, -48, 24, -32, 24, -8)
uv = PackedVector2Array(1.88, 5.28, 0.6, 1.44, 5.24, 0.64, 5.24, 0.64, 9.94, 3.84, 5.72, 6.56, 5.72, 6.56, 1.88, 5.28, 5.24, 0.64)
script = ExtResource("2_s3h7s")
height = 20.0
wall_texture = ExtResource("3_ondo6")
top_texture = ExtResource("5_evp07")
[node name="Spawn" type="Sprite2D" parent="Room"]
position = Vector2(-48, 32)