Merge pull request #73 from codename-gadget/feature/webgl/variable-in…

…stance-count

Make instance count variable

packages/webgl/src/lib/geometry/Geometry.ts

@@ -151,10 +151,12 @@ export default class Geometry<T extends GeometryProps = GeometryProps> extends C
 	private attributeInfo: InternalAttributeInfo[];
 	private indicesInfo: { buffer: Buffer, type: IndicesDeclaration['type'] };
 	private primitiveCount: number;
-	private instanceCount: number;
 	private isInstanced = false;
 	private mode: GeometryDrawMode;
 
+	/** How many geometry instances will be drawn. */
+	public instanceCount: number;
+
 	/** The underlying attribute buffers. */
 	public readonly attributes: {
 		[key in keyof T['attributes']]:
@@ -330,6 +332,20 @@ export default class Geometry<T extends GeometryProps = GeometryProps> extends C
 	}
 
 
+	/**
+	 * Sets the amount of geometry instances to draw.
+	 *
+	 * Keep in mind that this shouldn't exceed the number of instances
+	 * specified in any instanced attribute.
+	 *
+	 * @param count - The amount of geometry instances to draw.
+	 */
+	public setInstanceCount( count: number ): void {
+		this.instanceCount = count;
+		this.isInstanced = true;
+	}
+
+
 	/**
 	 * Calls `upload()` on all attribute buffers and the index buffer.
 	 */