Initial commit: VR Messs workspace (grab v5.3.1, body-physics research)

scripts/PropShop.cs

@@ -0,0 +1,141 @@
+using Godot;
+
+public partial class PropShop : Node3D
+{
+    private struct PropSpec
+    {
+        public string Name;
+        public float Radius;
+        public Vector3 Box;
+        public float Mass;
+        public float Bounce;
+        public float Friction;
+        public Color Color;
+        public Vector3 Position;
+    }
+
+    private static readonly PropSpec[] Specs =
+    {
+        new() { Name = "Ping pong · 2.7 g", Radius = 0.02f, Mass = 0.0027f, Bounce = 0.9f, Friction = 0.3f, Color = new(1f, 1f, 1f), Position = new(-0.5f, 0.78f, -0.55f) },
+        new() { Name = "Bouncy ball · 50 g", Radius = 0.03f, Mass = 0.05f, Bounce = 0.85f, Friction = 0.4f, Color = new(1f, 0.4f, 0.7f), Position = new(-0.3f, 0.79f, -0.45f) },
+        new() { Name = "Apple · 150 g", Radius = 0.045f, Mass = 0.15f, Bounce = 0.3f, Friction = 0.6f, Color = new(0.85f, 0.15f, 0.1f), Position = new(-0.08f, 0.81f, -0.55f) },
+        new() { Name = "Crate · 2 kg", Box = new(0.16f, 0.16f, 0.16f), Mass = 2f, Bounce = 0.1f, Friction = 0.8f, Color = new(0.7f, 0.5f, 0.25f), Position = new(0.18f, 0.84f, -0.5f) },
+        new() { Name = "Brick · 3.5 kg", Box = new(0.2f, 0.06f, 0.095f), Mass = 3.5f, Bounce = 0.05f, Friction = 0.9f, Color = new(0.6f, 0.3f, 0.2f), Position = new(-0.32f, 0.79f, -0.25f) },
+        new() { Name = "Bowling ball · 7.2 kg", Radius = 0.11f, Mass = 7.2f, Bounce = 0.1f, Friction = 0.5f, Color = new(0.1f, 0.2f, 0.5f), Position = new(0.05f, 0.87f, -0.25f) },
+        new() { Name = "Anvil · 50 kg", Box = new(0.28f, 0.16f, 0.13f), Mass = 50f, Bounce = 0f, Friction = 0.95f, Color = new(0.25f, 0.25f, 0.28f), Position = new(0.38f, 0.84f, -0.35f) },
+    };
+
+    public override void _Ready()
+    {
+        BuildTable();
+        foreach (PropSpec spec in Specs)
+            SpawnProp(spec);
+    }
+
+    public void Respawn()
+    {
+        foreach (Node node in GetTree().GetNodesInGroup("prop"))
+            node.QueueFree();
+        foreach (PropSpec spec in Specs)
+            SpawnProp(spec);
+        GD.Print("PropShop: table reset");
+    }
+
+    private void BuildTable()
+    {
+        Color wood = new(0.45f, 0.3f, 0.18f);
+        StaticBody3D table = new();
+        table.AddChild(new CollisionShape3D
+        {
+            Position = new Vector3(0, 0.725f, -0.6f),
+            Shape = new BoxShape3D { Size = new Vector3(1.4f, 0.05f, 0.8f) },
+        });
+        MeshInstance3D top = new()
+        {
+            Position = new Vector3(0, 0.725f, -0.6f),
+            Mesh = new BoxMesh { Size = new Vector3(1.4f, 0.05f, 0.8f) },
+        };
+        top.SetSurfaceOverrideMaterial(0, MakeMaterial(wood));
+        table.AddChild(top);
+
+        Vector3[] legOffsets =
+        {
+            new(-0.62f, 0, 0.32f),
+            new(0.62f, 0, 0.32f),
+            new(-0.62f, 0, -0.32f),
+            new(0.62f, 0, -0.32f),
+        };
+        foreach (Vector3 offset in legOffsets)
+        {
+            Vector3 pos = new(offset.X, 0.3625f, -0.6f + offset.Z);
+            table.AddChild(new CollisionShape3D
+            {
+                Position = pos,
+                Shape = new BoxShape3D { Size = new Vector3(0.06f, 0.725f, 0.06f) },
+            });
+            MeshInstance3D leg = new()
+            {
+                Position = pos,
+                Mesh = new BoxMesh { Size = new Vector3(0.06f, 0.725f, 0.06f) },
+            };
+            leg.SetSurfaceOverrideMaterial(0, MakeMaterial(wood * 0.8f));
+            table.AddChild(leg);
+        }
+        AddChild(table);
+    }
+
+    private void SpawnProp(PropSpec spec)
+    {
+        RigidBody3D body = new()
+        {
+            Name = spec.Name,
+            Mass = spec.Mass,
+            Position = spec.Position,
+            PhysicsMaterialOverride = new PhysicsMaterial { Bounce = spec.Bounce, Friction = spec.Friction },
+            ContinuousCd = spec.Mass < 0.1f,
+            ContactMonitor = true,
+            MaxContactsReported = 4,
+        };
+        body.AddToGroup("prop");
+
+        if (spec.Radius > 0f)
+        {
+            body.AddChild(new CollisionShape3D { Shape = new SphereShape3D { Radius = spec.Radius } });
+            MeshInstance3D mesh = new()
+            {
+                Mesh = new SphereMesh { Radius = spec.Radius, Height = spec.Radius * 2f },
+            };
+            mesh.SetSurfaceOverrideMaterial(0, MakeMaterial(spec.Color));
+            body.AddChild(mesh);
+        }
+        else
+        {
+            body.AddChild(new CollisionShape3D { Shape = new BoxShape3D { Size = spec.Box } });
+            MeshInstance3D mesh = new()
+            {
+                Mesh = new BoxMesh { Size = spec.Box },
+            };
+            mesh.SetSurfaceOverrideMaterial(0, MakeMaterial(spec.Color));
+            body.AddChild(mesh);
+        }
+
+        float halfHeight = spec.Radius > 0f ? spec.Radius : spec.Box.Y * 0.5f;
+        body.AddChild(new Label3D
+        {
+            Text = spec.Name,
+            FontSize = 64,
+            PixelSize = 0.0004f,
+            OutlineSize = 8,
+            Billboard = BaseMaterial3D.BillboardModeEnum.Enabled,
+            Position = new Vector3(0, halfHeight + 0.1f, 0),
+        });
+
+        AddChild(body);
+    }
+
+    private static StandardMaterial3D MakeMaterial(Color color) => new()
+    {
+        AlbedoColor = color,
+        Roughness = 0.7f,
+    };
+}