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);
}