copygirl
/
Inventory2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Improve Grid handling, prevent overlapping items

Browse Source 
- Move snapping logic to Grid class
- Add Grid.CanPlaceAt to check for item overlap
  (no test for collision with physics-enabled items)
- Change outline color depending on if can place
main
copygirl 11 months ago
parent 17da96969a
commit 9b7cb3d2fd
4 changed files with 128 additions and 47 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 8
      assets/shaders/outline_material.tres
  2. 11
      game.tscn
  3. 76
      objects/Grid.cs
  4. 80
      player/PickupController.cs

8
assets/shaders/outline_material.tres
Unescape View File

@ -0,0 +1,8 @@
[gd_resource type="ShaderMaterial" load_steps=2 format=3 uid="uid://c0q35rri3vb07"]
[ext_resource type="Shader" path="res://assets/shaders/outline.gdshader" id="1_yi6vm"]
[resource]
shader = ExtResource("1_yi6vm")
shader_parameter/line_color = Color(1, 1, 1, 0.75)
shader_parameter/line_thickness = 3.0

11
game.tscn
Unescape View File

@ -1,20 +1,15 @@
[gd_scene load_steps=11 format=3 uid="uid://puuk72ficqhu"]
[gd_scene load_steps=10 format=3 uid="uid://puuk72ficqhu"]
[ext_resource type="Script" path="res://scripts/MultiplayerManager.cs" id="1_7shyh"]
[ext_resource type="Script" path="res://Game.cs" id="1_uywdd"]
[ext_resource type="PackedScene" uid="uid://dmd7w2r8s0x6y" path="res://player/player.tscn" id="2_iv2f7"]
[ext_resource type="PackedScene" uid="uid://bwfuet1irfi17" path="res://scenes/workshop.tscn" id="3_4u5ql"]
[ext_resource type="Shader" path="res://assets/shaders/outline.gdshader" id="4_gacvj"]
[ext_resource type="Material" uid="uid://c0q35rri3vb07" path="res://assets/shaders/outline_material.tres" id="5_a3fxj"]
[ext_resource type="Script" path="res://scripts/OutlineCamera.cs" id="5_qpc14"]
[ext_resource type="PackedScene" uid="uid://c5ooi36ibspfo" path="res://ui/menu.tscn" id="6_ol0j5"]
[ext_resource type="Texture2D" uid="uid://lxxfestfg2dt" path="res://assets/crosshair.png" id="7_0l5tv"]
[ext_resource type="Script" path="res://scripts/Crosshair.cs" id="8_mfhgr"]
[sub_resource type="ShaderMaterial" id="ShaderMaterial_ke1l3"]
shader = ExtResource("4_gacvj")
shader_parameter/line_color = Color(1, 1, 1, 0.75)
shader_parameter/line_thickness = 2.0
[node name="Game" type="Node" node_paths=PackedStringArray("LocalPlayer")]
script = ExtResource("1_uywdd")
LocalPlayer = NodePath("Players/Local")
@ -33,7 +28,7 @@ PlayerScene = ExtResource("2_iv2f7")
IsLocal = true
[node name="OutlineViewportContainer" type="SubViewportContainer" parent="."]
material = SubResource("ShaderMaterial_ke1l3")
material = ExtResource("5_a3fxj")
anchors_preset = 15
anchor_right = 1.0
anchor_bottom = 1.0

76
objects/Grid.cs
Unescape View File

@ -10,13 +10,22 @@ public partial class Grid : Area3D
static readonly Color ThickLineColor = new(0.25f, 0.25f, 0.25f);
static readonly Color ThinLineColor = new(0.35f, 0.35f, 0.35f);
// TODO: Make GridSize be three-dimensional?
Vector2I _gridSize = new(16, 16);
Vector3 _halfGridActualSize = new(8.0f, 0.0f, 8.0f);
[Export] public Vector2I GridSize {
get => _gridSize;
set { _gridSize = value; Update(); }
set {
_gridSize = value;
// Helper value for converting grid pos to local pos and back.
_halfGridActualSize = new Vector3(GridSize.X, 0, GridSize.Y) * (StepSize / 2.0f);
Update();
}
}
public override void _Ready() => Update();
public override void _Ready()
=> Update();
void Update()
{
@ -24,6 +33,69 @@ public partial class Grid : Area3D
UpdateImmediateMesh();
}
public Vector3I LocalToGrid(Vector3 pos)
=> (Vector3I)((pos + _halfGridActualSize) / StepSize);
public Vector3 GridToLocal(Vector3I pos)
=> (pos + Vector3.One * 0.5f) * StepSize - _halfGridActualSize;
public Vector3I GlobalToGrid(Vector3 pos)
=> LocalToGrid(ToLocal(pos));
public Vector3 GridToGlobal(Vector3I pos)
=> ToGlobal(GridToLocal(pos));
public static Aabb LocalItemTransformToLocalAabb(Transform3D transform, Item item)
{
var bounds = (transform.Basis * ((Vector3)item.Size * StepSize)).Abs();
return new(transform.Origin - bounds / 2, bounds);
}
/// <summary>
/// Returns whether the item can be placed at the specified global transform.
/// The transform needs to be grid-aligned, such as by calling <see cref="Snap"/>.
/// </summary>
public bool CanPlaceAt(Item item, Transform3D transform)
{
transform = GlobalTransform.AffineInverse() * transform;
var region = LocalItemTransformToLocalAabb(transform, item).Grow(-0.01f);
foreach (var other in GetChildren().OfType<Item>())
if (region.Intersects(LocalItemTransformToLocalAabb(other.Transform, other)))
return false;
return true;
}
/// <summary>
/// Snaps a global transform to line up with the grid.
/// The transform will be "pushed out" into the normal vector's
/// direction according to the current rotation and item's size.
/// </summary>
public Transform3D Snap(Transform3D transform, Vector3 normal, Item item)
{
var inverseTransform = GlobalTransform.AffineInverse();
var inverseBasis = GlobalBasis.Inverse();
var halfSize = (Vector3)item.Size * StepSize / 2;
// Get grid-local values of the global transform and normal.
var pos = inverseTransform * transform.Origin;
var basis = inverseBasis * transform.Basis;
normal = inverseBasis * normal;
// Snap rotation to nearest axis.
basis = Basis.FromEuler(basis.GetEuler().Snapped(Tau / 4));
// Offset / "push out" by half of the item's size.
var offsetAxis = (int)(normal * basis).Abs().MaxAxisIndex();
pos += halfSize[offsetAxis] * normal;
// Snap the position to the grid.
var halfOff = basis * halfSize.PosMod(1.0f);
pos = halfOff + (pos - halfOff).Snapped(StepSize);
return new(GlobalBasis * basis, GlobalTransform * pos);
}
static StandardMaterial3D _material;
static StandardMaterial3D GetOrCreateMaterial()
{

80
player/PickupController.cs
Unescape View File

@ -1,18 +1,25 @@
public partial class PickupController : Node3D
{
static readonly Color OutlinePickup = Colors.White with { A = 0.75f };
static readonly Color OutlineYesPlace = Colors.Green with { A = 0.75f };
static readonly Color OutlineNoPlace = Colors.Red with { A = 0.75f };
Node3D _preview; // Placement preview of the item - a duplicate of its model.
Grid _grid; // Grid currently being hovered over.
public Item CurrentItem { get; private set; }
public bool HasItemsHeld => GetChildCount() > 0;
Node3D _placementPreview;
[Export] public float PickupDistance { get; set; } = 2.0f;
Player _player;
Node3D _world;
ShaderMaterial _outlineShaderMaterial;
public override void _Ready()
{
_player = GetParent<Player>();
// TODO: Find a better way to find the world.
_world = GetNode<Node3D>("/root/Game/Workshop");
_world = GetNode<Node3D>("/root/Game/Workshop"); // TODO: Find a better way to get the world.
_outlineShaderMaterial = Load<ShaderMaterial>("res://assets/shaders/outline_material.tres");
}
public override void _UnhandledInput(InputEvent @event)
@ -24,12 +31,12 @@ public partial class PickupController : Node3D
if (@event.IsActionPressed("interact_pickup")) {
if (!HasItemsHeld) {
// Create clone of the item's model, use it as placement preview.
_placementPreview = (Node3D)CurrentItem.Model.Duplicate(0);
_placementPreview.Name = "PlacementPreview";
_placementPreview.TopLevel = true;
_placementPreview.Visible = false;
SetMeshLayerOutline(_placementPreview, OutlineMode.Exclusive);
AddChild(_placementPreview);
_preview = (Node3D)CurrentItem.Model.Duplicate(0);
_preview.Name = "PlacementPreview";
_preview.TopLevel = true;
_preview.Visible = false;
SetMeshLayerOutline(_preview, OutlineMode.Exclusive);
AddChild(_preview);
// Parent item to the `PickupController`.
var prevRot = CurrentItem.GlobalRotation;
@ -47,11 +54,12 @@ public partial class PickupController : Node3D
// Parent item back to the world.
var prevTransform = CurrentItem.GlobalTransform;
RemoveChild(CurrentItem);
_world.AddChild(CurrentItem);
if (_placementPreview.Visible) {
CurrentItem.GlobalTransform = _placementPreview.GlobalTransform;
if (_preview.Visible && _grid != null) {
_grid.AddChild(CurrentItem);
CurrentItem.GlobalTransform = _preview.GlobalTransform;
} else {
_world.AddChild(CurrentItem);
CurrentItem.GlobalTransform = prevTransform;
CurrentItem.Freeze = false;
@ -61,9 +69,13 @@ public partial class PickupController : Node3D
CurrentItem.ApplyImpulse(direction * 2);
}
RemoveChild(_placementPreview);
_placementPreview.QueueFree();
_placementPreview = null;
// Reset the color of the outline shader material.
_outlineShaderMaterial.SetShaderParameter("line_color", OutlinePickup);
RemoveChild(_preview);
_preview.QueueFree();
_preview = null;
_grid = null;
GetViewport().SetInputAsHandled();
}
@ -77,25 +89,19 @@ public partial class PickupController : Node3D
if (HasItemsHeld) {
if ((RayToMouseCursor() is RayResult ray) && (ray.Collider is Grid grid)) {
// Snao rotation to nearest axis.
var localBasis = grid.GlobalBasis.Inverse() * CurrentItem.GlobalBasis;
localBasis = Basis.FromEuler(localBasis.GetEuler().Snapped(Tau / 4));
_placementPreview.GlobalBasis = grid.GlobalBasis * localBasis;
// Snap the position to the grid.
var halfSize = (Vector3)CurrentItem.Size * Grid.StepSize / 2;
var localPos = ray.Position * grid.GlobalTransform; // Get grid-local ray position.
var localNormal = ray.Normal * grid.GlobalBasis; // Get grid-local ray normal. (Pointing away from surface hit.)
var off = localBasis * halfSize.PosMod(1.0f); // Calculate an offset for grid snapping.
off[(int)localNormal.Abs().MaxAxisIndex()] = 0; // Do not include offset in the normal direction.
localPos = off + (localPos - off).Snapped(Grid.StepSize); // Snap `localPos` to nearest grid value.
var axis = (localNormal * localBasis).Abs().MaxAxisIndex(); // Find object-local axis that the normal is pointing towards.
localPos += halfSize[(int)axis] * localNormal; // Offset (push out) object by half its size.
_placementPreview.GlobalPosition = grid.GlobalTransform * localPos;
_placementPreview.Visible = true;
var transform = CurrentItem.GlobalTransform with { Origin = ray.Position };
transform = grid.Snap(transform, ray.Normal, CurrentItem);
_preview.GlobalTransform = transform;
var canPlace = grid.CanPlaceAt(CurrentItem, transform);
var outlineColor = canPlace ? OutlineYesPlace : OutlineNoPlace;
_outlineShaderMaterial.SetShaderParameter("line_color", outlineColor);
_preview.Visible = true;
_grid = canPlace ? grid : null;
} else {
_placementPreview.Visible = false;
_preview.Visible = false;
_grid = null;
}
} else {
var interactable = RayToMouseCursor()?.Collider;
@ -114,10 +120,10 @@ public partial class PickupController : Node3D
if (CurrentItem == null) return;
if (!IsInstanceValid(CurrentItem)) {
CurrentItem = null;
if (_placementPreview != null) {
RemoveChild(_placementPreview);
_placementPreview.QueueFree();
_placementPreview = null;
if (_preview != null) {
RemoveChild(_preview);
_preview.QueueFree();
_preview = null;
}
}
}

Write Preview
Loading…
Cancel
Save