// Get a back-buffer-sized quadrilateral
public VertexInput[] GetBackBufferQuad()
{
// Entry logging
#if IS_LOGGING_METHODS
Log.Write(String.Format("Entering method for {0}", this.Name));
#endif
// Initialize result
VertexInput[] vertices = new VertexInput[4];
// Get back buffer dimensions
int w = this.BackBuffer.Width;
int h = this.BackBuffer.Height;
// Create vertices
vertices[0] = new VertexInput(new Vector2(0, 0), Color.White, new Vector2(0, 0));
vertices[1] = new VertexInput(new Vector2(w, 0), Color.White, new Vector2(1, 0));
vertices[2] = new VertexInput(new Vector2(w, h), Color.White, new Vector2(1, 1));
vertices[3] = new VertexInput(new Vector2(0, h), Color.White, new Vector2(0, 1));
// Exit logging
#if IS_LOGGING_METHODS
Log.Write(String.Format("Exiting method for {0}", this.Name));
#endif
// Return result
return(vertices);
}
// Update vertex and index buffers
public void UpdateBuffers()
{
// Entry logging
#if IS_LOGGING_METHODS
Log.Write(String.Format("Entering method for {0}", this.Name));
#endif
// Create an array of vertex data
VertexInput[] vertexData = new VertexInput[this.VertexCount];
// Create an array of index data
int[] indexData = new int[this.IndexCount];
// Initialize i, the current sprite index
int i = 0;
// Initialize k1, the current vertex index offset
int k1 = 0;
// Initialize k2, the current index index offset
int k2 = 0;
// Loop over sprites
while (i < this.SpriteCount)
{
// Get the current sprite's vertices
VertexInput[] vertices = this.Sprites[i].Vertices;
// Get the current sprite's indices
int[] indices = this.Sprites[i].Indices;
// Get the current sprite's vertex count
int n1 = vertices.Length;
// Get the current sprite's index count
int n2 = indices.Length;
// Add vertices
for (int j = 0; j < n1; j++)
{
vertexData[k1 + j] = vertices[j];
}
// Add indices
for (int j = 0; j < n2; j++)
{
indexData[k2 + j] = k1 + indices[j];
}
// Increment vertex offset
k1 += n1;
// Increment index offset
k2 += n2;
// Increment sprite
i++;
}
// Check vertex buffer size
if (this.VertexCount > this.VertexBuffer.VertexCount)
{
// If too small, expand
// First, calculate new size
int newSize = (int)Math.Ceiling((double)this.VertexCount / (4 * this.ExtensionSize) + 1) * (4 * this.ExtensionSize);
// Log
#if IS_LOGGING_DRAW
Log.Write(String.Format("WARNING: Layer {0}'s vertex buffer is too small! inboundSize = {1}, bufferSize = {2}, newSize = {3}", this.Name, this.VertexCount, this.VertexBuffer.VertexCount, n));
#endif
// Create a new, expanded buffer
this.VertexBuffer = new WrappedVertexBuffer(newSize);
}
// Check index buffer size
if (this.IndexCount > this.IndexBuffer.IndexCount)
{
// If too small, expand
// First, calculate new size
int newSize = (int)Math.Ceiling((double)this.VertexCount / (6 * this.ExtensionSize) + 1) * (6 * this.ExtensionSize);
// Log
#if IS_LOGGING_DRAW
Log.Write(String.Format("WARNING: Layer {0}'s index buffer is too small! inboundSize = {1}, bufferSize = {2}, newSize = {3}", this.Name, this.IndexCount, this.IndexBuffer.IndexCount, n));
#endif
// Create a new, expanded buffer
this.IndexBuffer = new WrappedIndexBuffer(newSize);
}
//Trace.WriteLine("vd = " + vertexData.Length);
//Trace.WriteLine("vb = " + this.vertexBuffer.VertexCount);
//Trace.WriteLine("id = " + indexData.Length);
//Trace.WriteLine("ib = " + this.indexBuffer.IndexCount);
// Send data to vertex buffer
this.VertexBuffer.SetData(vertexData);
// Send data to index buffer
this.IndexBuffer.SetData(indexData);
// Temporary: Save data for debugging purposes
this.vertices = vertexData;
this.indices = indexData;
// Exit logging
#if IS_LOGGING_METHODS
Log.Write(String.Format("Exiting method for {0}", this.Name));
#endif
}