/// <summary>
/// Creates a quad from screen coordinates.
/// </summary>
/// <param name="position">Position.</param>
/// <param name="size">Size.</param>
/// <param name="deviceNormalized">If set to <c>true</c> the position and size are already device normalized.</param>
public void CreateQuad(Vector2 position, Vector2 size, bool deviceNormalized)
{
RVertexData2D[] vertices = new RVertexData2D[4];
short[] indices = new short[6] {
0, 1, 2, 0, 2, 3
};
if (!deviceNormalized)
{
// Kinda like a 2d unproject, screen coords to device normal coords...
RViewport viewport = REngine.Instance._viewport;
Vector2 w = new Vector2(viewport.Width, viewport.Height);
Vector2 l = size;
Vector2 d = (l / w);
size.X = d.X;
size.Y = d.Y;
Vector2 p = (position / w);
position.X = p.X;
position.Y = p.Y;
}
vertices[0] = new RVertexData2D(new Vector2(position.X, position.Y), new Vector2(0, 0));
vertices[1] = new RVertexData2D(new Vector2(position.X, position.Y + size.Y), new Vector2(0, 1));
vertices[2] = new RVertexData2D(new Vector2(position.X + size.X, position.Y + size.Y), new Vector2(1, 1));
vertices[3] = new RVertexData2D(new Vector2(position.X + size.X, position.Y), new Vector2(1, 0));
VertexBuffer = new RVertexBuffer(vertices[0].Declaration, 4, RBufferUsage.WriteOnly);
VertexBuffer.SetData <RVertexData2D>(vertices);
_index = new RIndexBuffer(typeof(short), 6, RBufferUsage.WriteOnly);
_index.SetData <short>(indices);
}
internal void Init()
{
REngine.CheckGLError();
defaultShader = new RShader();
defaultShader.Load(RShaderResources.Basic2dEffectVert, RShaderResources.Basic2dEffectFrag, null);
Fonts.Add(RFont.Default);
quad = new RMeshBuilder();
quad.CreateQuad(new Vector2(0, 0), new Vector2(1, 1), true);
quadVerts = new RVertexData2D[4];
quadVerts[0] = new RVertexData2D(new Vector2(-1, -1), new Vector2(0, 0));
quadVerts[1] = new RVertexData2D(new Vector2(1, -1), new Vector2(1, 0));
quadVerts[2] = new RVertexData2D(new Vector2(1, 1), new Vector2(1, 1));
quadVerts[3] = new RVertexData2D(new Vector2(-1, 1), new Vector2(0, 1));
vertexQuad2D = new RVertexBuffer(quadVerts[0].Declaration, 4, RBufferUsage.WriteOnly);
vertexQuad2D.SetData <RVertexData2D>(quadVerts);
indexQuad2D = new RIndexBuffer(typeof(short), 6, RBufferUsage.WriteOnly);
indexQuad2D.SetData <short>(new short[6] {
0, 1, 2, 0, 2, 3
}, 0, 6);
initialized = true;
}