Introduction

Here's a quick example you can paste in your Program.Main that will display a colored square on your screen.

var stage = new Stage(800, 500, "Hello World");

stage.TreeNode.AddChild(new Entity
{
	new GeometryComponent
	{
		new Vector2d(0, 0),
		new Vector2d(100, 0),
		new Vector2d(100, 100),
		new Vector2d(0, 100)
	},
	new ShapeColorComponent
	{
		new Vector4(1, 0, 0, 1),
		new Vector4(0, 1, 0, 1),
		new Vector4(0, 0, 1, 1),
		new Vector4(1, 1, 0, 1)
	},
	new RenderBufferComponent(stage.Renderer),
	new TreeNodeComponent()
});

stage.Run();

First we make a new Stage instance. The stage is an entity to which you attach other entities that you want on the screen. TreeNode is a shorthand that points to the stage's TreeNodeComponent. Shorthands will be discussed in the next section. The TreeNodeComponent is they way you connect entities together in a hierarchical order. We supply the AddChild method with a new entity which we construct on the spot adding some components to it. The GeometryComponent provides the mesh coordinate data. It doesn't contain color information or texture coordinates so it can be used for purposes other than rendering. The ShapeColorComponent adds the color data to those points. Next, we add the RenderBufferComponent and the TreeNodeComponent. The render buffer will process the geometry and color data and update the internal buffer that is later rendered. We need the tree node so we have an "attachment point" for the stage's tree node.

After the setup is done, we call stage.Run. This blocks further code execution until we close the opened window.