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Primitive batch now works with strips.

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This commit is contained in:
Harrison Deng 2019-01-11 23:11:45 -06:00
parent ec62b81a12
commit c9991f08c5
1 changed files with 12 additions and 14 deletions
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26
RecrownedAthenaeum/Render/PrimitiveBatch.cs
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@ -11,8 +11,8 @@ namespace RecrownedAthenaeum.Render
{
public class PrimitiveBatch : IDisposable
{
VertexPositionColor[] vertices;
int MaxVertices { get { return vertices.Length; } }
List<VertexPositionColor> vertices;
int maxVertices;
int bufferPosition;
BasicEffect basicEffect;
PrimitiveType primitiveType;
@ -26,16 +26,16 @@ namespace RecrownedAthenaeum.Render
/// </summary>
/// <param name="graphicsDevice">The current graphics device being used.</param>
/// <param name="camera">The current camera being used.</param>
/// <param name="verticesPerBatch">The amount of vertices every batch can hold before flushing. Default is 450.</param>
public PrimitiveBatch(GraphicsDevice graphicsDevice, Camera2D camera, int verticesPerBatch = 450)
/// <param name="verticesPerBatch">The amount of vertices every batch can hold before flushing. Default is 450. Should be changed to be the most optimal number if possible. Especially if using strip primitive types.</param>
public PrimitiveBatch(GraphicsDevice graphicsDevice, Camera2D camera, int verticesPerBatch = 500)
{
this.graphicsDevice = graphicsDevice ?? throw new ArgumentNullException("Graphics device can't be null.");
maxVertices = verticesPerBatch;
basicEffect = new BasicEffect(graphicsDevice);
basicEffect.VertexColorEnabled = true;
basicEffect.View = camera.Matrix;
vertices = new VertexPositionColor[verticesPerBatch];
vertices = new List<VertexPositionColor>(verticesPerBatch);
}
/// <summary>
@ -46,11 +46,12 @@ namespace RecrownedAthenaeum.Render
{
if (began) throw new InvalidOperationException("Begin is being called twice before being ended.");
this.primitiveType = primitiveType;
this.verticesPerPrimitive = 0;
verticesPerPrimitive = 0;
switch (primitiveType)
{
case PrimitiveType.LineList: verticesPerPrimitive = 2; break;
case PrimitiveType.TriangleList: verticesPerPrimitive = 3; break;
default: verticesPerPrimitive = 1; break;
}
basicEffect.CurrentTechnique.Passes[0].Apply();
@ -74,27 +75,24 @@ namespace RecrownedAthenaeum.Render
public void AddVertex(Vector2 vertex, Color color)
{
if (!began) throw new InvalidOperationException("Begin needs to be called before adding vertex.");
if (bufferPosition + verticesPerPrimitive >= MaxVertices && (bufferPosition % MaxVertices == 0))
if (primitiveType != PrimitiveType.LineStrip && primitiveType != PrimitiveType.TriangleStrip && bufferPosition + verticesPerPrimitive >= maxVertices && (bufferPosition % maxVertices == 0))
{
Flush();
}
vertices[bufferPosition].Position = (new Vector3(vertex, 0));
vertices[bufferPosition].Color = color;
vertices[bufferPosition] = new VertexPositionColor(new Vector3(vertex, 0), color);
bufferPosition++;
}
/// <summary>
/// Flushes the batch. Automatically called if required.
/// Flushes the batch. Automatically called if required if using <see cref="PrimitiveType.LineList"/> or <see cref="PrimitiveType.TriangleList"/>. Otherwise, manual flushing is required.
/// </summary>
public void Flush()
{
if (!began) throw new InvalidOperationException("Begin needs to be called before flushing.");
if (bufferPosition == 0) return;
graphicsDevice.DrawUserPrimitives(primitiveType, vertices, 0, bufferPosition / verticesPerPrimitive);
graphicsDevice.DrawUserPrimitives(primitiveType, vertices.ToArray(), 0, bufferPosition / verticesPerPrimitive);
bufferPosition = 0;
}