public PrimitiveDemo(Layer layer) : base(layer)
{
// Primitives can only be drawn from instances. There are no static methods.
_trianglefan = new TriangleFanPrimitive();
_trianglefan.Vertices = new List <Vertex>
{
new Vertex(new Vector2(0, 0)),
new Vertex(new Vector2(16, 0)),
new Vertex(new Vector2(40, 10)),
new Vertex(new Vector2(64, 64)),
new Vertex(new Vector2(0, 32)),
};
_trianglestrip = new TriangleStripPrimitive();
_trianglestrip.Vertices = new List <Vertex>
{
new Vertex(new Vector2(0, 0), _mainColor),
new Vertex(new Vector2(32, 32), _secondaryColor),
new Vertex(new Vector2(64, 0), _secondaryColor2),
new Vertex(new Vector2(96, 32), _secondaryColor),
new Vertex(new Vector2(64 + 32, 0), _secondaryColor2),
new Vertex(new Vector2(96 + 32, 32), _secondaryColor),
new Vertex(new Vector2(64 + 64, 0), _secondaryColor2),
new Vertex(new Vector2(96 + 64, 32), _mainColor),
};
_mesh = new MeshPrimitive(16, 16);
_mesh.Position = new Vector2(0, 100);
// You can set the texture for a primitive. Preferrably it shouldn't be in texture atlas.
// If in atlas, textures wouldn't be able to repeat.
_mesh.SetTextureFromFrame(Default.AutismCat[0]);
_mesh.Vertices = new List <Vertex>(8 * 8);
for (var k = 0; k < _mesh.Height; k += 1)
{
for (var i = 0; i < _mesh.Width; i += 1)
{
_mesh.Vertices.Add(
new Vertex(
Vector2.Zero, // Positions will be set later.
Color.White,
new Vector2(i / (float)(_mesh.Width - 1), k / (float)(_mesh.Height - 1)) * _meshRepeat
)
);
}
}
_linestrip = new LineStripPrimitive();
_linestrip.Vertices = new List <Vertex>();
for (var i = 0; i < 16; i += 1)
{
_linestrip.Vertices.Add(new Vertex(Vector2.Zero, new Color(16 * i, 8 * i, 4 * i)));
}
// You can make your own custom primitives.
// CustomTrianglePrimitive and CustomLinePrimitive give you
// access to the index array. Index array tells inwhat order vertices should be drawn.
// One vertex can be used multiple times in an index array.
_custom = new CustomTrianglePrimitive();
_custom.Vertices = new List <Vertex>()
{
new Vertex(new Vector2(0, 0), Color.Green),
new Vertex(new Vector2(32, 0)),
new Vertex(new Vector2(32, 32)),
new Vertex(new Vector2(64, 32), Color.Blue),
};
_custom.Indices = new short[] { 0, 1, 2, 1, 3, 2 };
}