/////////////////////////////////////////////////////////////////////////////////
// Ctor & Dtor
public Entity(EntityDescription desc)
{
Device = desc.Device;
Context = desc.Context;
PrimitiveTopology = desc.PrimitiveTopology;
VertexShader = desc.VertexShader;
VertexShaderSignature = desc.VSInputSignature;
PixelShader = desc.PixelShader;
ResourceProviders = desc.PSResourceProviders;
}
public void Prepare()
{
var context = _device.ImmediateContext;
// setup resources
_providers.Add("at1", new TestTextureProvider(_device, "res/alphatest.png"));
_providers.Add("bg1", new TestTextureProvider(_device, "res/xLayer.png"));
_providers.Add("wb1", new WebTexture(_device, "http://www.libpng.org/pub/png/pngintro.html".ToUri()));
_providers.Add("yt1", new WebTexture(_device, "http://www.youtube.com/watch?v=KxWBv4y3m4w".ToUri()));
_providers.Add("yt2", new WebTexture(_device, "http://www.youtube.com/watch?v=0EurfDnlD5A".ToUri()));
_providers.Add("yt3", new WebTexture(_device, "http://www.youtube.com/watch?v=qdwUkYrHosk".ToUri()));
_providers.Add("yt4", new WebTexture(_device, "http://www.youtube.com/watch?v=9w5RHGBvf9A".ToUri()));
// descriptor easifies the creation of entities, e.g. rectangles.
EntityDescription entityDescription = new EntityDescription
{
Device = _device,
Context = _device.ImmediateContext,
VertexShader = _vertexShader,
VSInputSignature = _vsInputSignature,
PrimitiveTopology = PrimitiveTopology.TriangleStrip
};
entityDescription.PixelShader = _pixelShaders["Simple"];
entityDescription.PSResourceProviders = new ResourceProvider[] { _providers["bg1"] };
var rect1 = new Rectangle(new Vector2(0f, 0f), new Vector2(1f, 1f), entityDescription);
entityDescription.PSResourceProviders = new ResourceProvider[] { _providers["yt1"] };
var rect2 = new Rectangle(new Vector2(0f, 0f), new Vector2(.5f, .5f), entityDescription);
entityDescription.PixelShader = _pixelShaders["AlphaMap"];
entityDescription.PSResourceProviders = new ResourceProvider[] { _providers["yt2"], _providers["at1"] };
var rect3 = new Rectangle(new Vector2(0, .5f), new Vector2(.5f, .5f), entityDescription);
entityDescription.PSResourceProviders = new ResourceProvider[] { _providers["yt3"], _providers["wb1"] };
var rect4 = new Rectangle(new Vector2(.5f, 0), new Vector2(.5f, .5f), entityDescription);
entityDescription.PixelShader = _pixelShaders["GrayscaleAlphaMap"];
entityDescription.PSResourceProviders = new ResourceProvider[] { _providers["yt4"], _providers["yt2"] };
var rect5 = new Rectangle(new Vector2(.5f, .5f), new Vector2(.5f, .5f), entityDescription);
_rectangles.Add(rect1);
_rectangles.Add(rect2);
_rectangles.Add(rect3);
_rectangles.Add(rect4);
_rectangles.Add(rect5);
}
/////////////////////////////////////////////////////////////////////////////////
// CONSTRUCTOR & DESTRUCTOR
/// <summary>
/// TODO doc
/// </summary>
/// <param name="origin"></param>
/// <param name="span"></param>
/// <param name="device"></param>
/// <param name="context"></param>
/// <param name="vertexShader"></param>
/// <param name="vsSignature"></param>
/// <param name="pixelShader"></param>
/// <param name="resourceProviders"></param>
public Rectangle(
Vector2 origin,
Vector2 span,
EntityDescription desc)
: base(desc)
{
// create rect vertices
int vertexLength = Vector3.SizeInBytes; // should be 12: 3 * 4 bytes
int uvCoordLength = Vector2.SizeInBytes; // should be 8: 2 * 4 bytes
DataStream data = new DataStream((vertexLength + uvCoordLength) * 4, true, true);
origin.X = origin.X * 2 - 1;
origin.Y = 1 - origin.Y * 2;
float originPlusSpanX = origin.X + span.X * 2;
float originPlusSpanY = origin.Y - span.Y * 2;
// write 4 times: position vector & uv-coord vector ...
data.Write(new Vector3(origin.X, origin.Y, 0)); // vertex
data.Write(new Vector2(0, 0)); // UV coord
data.Write(new Vector3(originPlusSpanX, origin.Y, 0)); // vertex
data.Write(new Vector2(1, 0)); // UV coord
data.Write(new Vector3(origin.X, originPlusSpanY, 0)); // ...
data.Write(new Vector2(0, 1));
data.Write(new Vector3(originPlusSpanX, originPlusSpanY, 0));
data.Write(new Vector2(1, 1));
data.Position = 0;
// create the vertex layout and buffer
var elements = new[] { new InputElement("POSITION", 0, Format.R32G32B32_Float, 0, 0),
new InputElement("TEXTCOORD", 0, Format.R32G32_Float, vertexLength, 0) };
InputLayout = new InputLayout(Device, VertexShaderSignature, elements);
VertexBuffer = new D3DBuffer(Device,
data,
(int)data.Length,
ResourceUsage.Default,
BindFlags.VertexBuffer,
CpuAccessFlags.None,
ResourceOptionFlags.None,
0);
VertexBufferBinding = new VertexBufferBinding(VertexBuffer, vertexLength + uvCoordLength, 0);
data.Close();
data.Dispose();
}
