Add properties to model and mesh.

source/model/element.js

@@ -3,6 +3,7 @@ OV.Element = class
     constructor ()
     {
         this.name = '';
+        this.properties = [];
     }
 
     GetName ()
@@ -35,6 +36,22 @@ OV.Element = class
         return 0;
     }
 
+    PropertyCount ()
+    {
+        return this.properties.length;
+    }
+
+    AddProperty (property)
+    {
+        this.properties.push (property);
+        return this.properties.length - 1;
+    }
+
+    GetProperty (index)
+    {
+        return this.properties[index];
+    }
+
     EnumerateVertices (onVertex)
     {
 

test/tests/model_test.js

@@ -184,6 +184,20 @@ describe ('Model Finalization', function() {
     });    
 });
 
+describe ('Model Properties', function() {
+    let model = new OV.Model ();
+    model.AddProperty (new OV.Property (OV.PropertyType.Text, 'name 01', 'value 01'));
+    model.AddProperty (new OV.Property (OV.PropertyType.Integer, 'name 02', 2));
+    model.AddProperty (new OV.Property (OV.PropertyType.Number, 'name 03', 3.5));
+    assert.strictEqual (model.PropertyCount (), 3);
+    assert.strictEqual (model.GetProperty (0).name, 'name 01');
+    assert.strictEqual (model.GetProperty (0).value, 'value 01');
+    assert.strictEqual (model.GetProperty (1).name, 'name 02');
+    assert.strictEqual (model.GetProperty (1).value, 2);
+    assert.strictEqual (model.GetProperty (2).name, 'name 03');
+    assert.strictEqual (model.GetProperty (2).value, 3.5);
+});
+
 describe ('Color Conversion', function() {
     it ('Color equality check', function () {
         assert (OV.ColorIsEqual (new OV.Color (10, 20, 30), new OV.Color (10, 20, 30)));