Initial commit.

There's a lot of code at play here, so I haven't tested it yet.
A good chunk of the components are available though.

DataTypes/PhysicalProperties.cs

@@ -0,0 +1,50 @@
+using Roblox.Enums;
+using Roblox.DataTypes.Utility;
+
+namespace Roblox.DataTypes
+{
+    public struct PhysicalProperties
+    {
+        public readonly float Density;
+        public readonly float Friction;
+        public readonly float Elasticity;
+
+        public float FrictionWeight;
+        public float ElasticityWeight;
+
+        public PhysicalProperties(Material material)
+        {
+            Density = MaterialInfo.DensityMap[material];
+            Friction = MaterialInfo.FrictionMap[material];
+            Elasticity = MaterialInfo.ElasticityMap[material];
+
+            FrictionWeight = 1;
+            ElasticityWeight = 1;
+        }
+
+        public PhysicalProperties(float density, float friction, float elasticity)
+        {
+            Density = density;
+            Friction = friction;
+            Elasticity = elasticity;
+
+            FrictionWeight = 1;
+            ElasticityWeight = 1;
+        }
+
+        public PhysicalProperties(float density, float friction, float elasticity, float frictionWeight, float elasticityWeight)
+        {
+            Density = density;
+            Friction = friction;
+            Elasticity = elasticity;
+
+            FrictionWeight = frictionWeight;
+            ElasticityWeight = elasticityWeight;
+        }
+
+        public override string ToString()
+        {
+            return string.Join(", ", Density, Friction, Elasticity, FrictionWeight, ElasticityWeight);
+        }
+    }
+}