private bool InitializeSentence(out Sentence sentence, int maxLength, Device device)
{
// Create a new sentence object.
sentence = new Sentence();
// Initialize the sentence buffers to null;
sentence.VertexBuffer = null;
sentence.IndexBuffer = null;
// Set the maximum length of the sentence.
sentence.MaxLength = maxLength;
// Set the number of vertices in vertex array.
sentence.VertexCount = 6 * maxLength;
// Set the number of vertices in the vertex array.
sentence.IndexCount = sentence.VertexCount;
// Create the vertex array.
var vertices = new TextureShader.Vertex[sentence.VertexCount];
// Create the index array.
var indices = new int[sentence.IndexCount];
// Initialize vertex array to zeros at first.
foreach (var vertex in vertices)
vertex.SetToZero();
// Initialize the index array.
for (var i = 0; i < sentence.IndexCount; i++)
indices[i] = i;
// Set up the description of the dynamic vertex buffer.
var vertexBufferDesc = new BufferDescription()
{
Usage = ResourceUsage.Dynamic,
SizeInBytes = Utilities.SizeOf<TextureShader.Vertex>() * sentence.VertexCount,
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.Write,
OptionFlags = ResourceOptionFlags.None,
StructureByteStride = 0
};
// Create the vertex buffer.
sentence.VertexBuffer = Buffer.Create(device, vertices, vertexBufferDesc);
// Create the index buffer.
sentence.IndexBuffer = Buffer.Create(device, BindFlags.IndexBuffer, indices);
return true;
}
private bool InitializeBuffers(Device device)
{
try
{
// Set the number of the vertices and indices in the vertex and index array, accordingly.
VertexCount = 6;
IndexCount = 6;
// Create the vertex array.
var vertices = new TextureShader.Vertex[VertexCount];
// Initialize vertex array to zeroes at first.
foreach (var vertex in vertices)
vertex.SetToZero();
// Create the index array.
var indices = new int[IndexCount];
// Load the index array with data.
for (var i = 0; i < IndexCount; i++)
indices[i] = i;
// Set up the description of the static vertex buffer.
var vertexBufferDesc = new BufferDescription()
{
Usage = ResourceUsage.Dynamic,
SizeInBytes = Utilities.SizeOf<TextureShader.Vertex>() * VertexCount,
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.Write,
OptionFlags = ResourceOptionFlags.None,
StructureByteStride = 0
};
// Create the vertex buffer.
VertexBuffer = Buffer.Create(device, vertices, vertexBufferDesc);
// Create the index buffer.
IndexBuffer = Buffer.Create(device, BindFlags.IndexBuffer, indices);
return true;
}
catch
{
return false;
}
}
private bool UpdateSentence(ref Sentence sentence, string text, int positionX, int positionY, float red, float green, float blue, DeviceContext deviceContext)
{
// Store the color of the sentence.
sentence.red = red;
sentence.green = green;
sentence.blue = blue;
// Get the number of the letter in the sentence.
var numLetters = sentence.MaxLength;
// Check for possible buffer overflow.
if (numLetters > sentence.MaxLength)
return false;
//// Adjust text to show on the screen.
//for (var i = 0; i < sentence.MaxLength - 1; i++)
// text += " ";
//text = text.Substring(0, sentence.MaxLength);
// Calculate the X and Y pixel position on screen to start drawing to.
var drawX = -(ScreenWidth >> 1) + positionX;
var drawY = (ScreenHeight >> 1) - positionY;
// Use the font class to build the vertex array from the sentence text and sentence draw location.
List<TextureShader.Vertex> vertices;
Font.BuildVertexArray(out vertices, text, drawX, drawY);
// Empty all remaining vertices
for (int i = text.Length; i < sentence.MaxLength; i++)
{
var emptyVertex = new TextureShader.Vertex();
emptyVertex.SetToZero();
vertices.Add(emptyVertex);
}
DataStream mappedResource;
#region Vertex Buffer
// Lock the vertex buffer so it can be written to.
deviceContext.MapSubresource(sentence.VertexBuffer, MapMode.WriteDiscard, SharpDX.Direct3D11.MapFlags.None, out mappedResource);
// Copy the data into the vertex buffer.
mappedResource.WriteRange<TextureShader.Vertex>(vertices.ToArray());
// Unlock the vertex buffer.
deviceContext.UnmapSubresource(sentence.VertexBuffer, 0);
#endregion
return true;
}