private void Flush()
{
modelBuffer.Bind();
modelBuffer.SetData(itemPool, itemCount);
foreach (var attribute in descriptor.AttributeFormats)
{
var value = attribute.Value;
material.Program.Attribute(attribute.Key).VertexAttributePointer(
value.ComponentCount,
value.ComponentType,
value.IsNormalized,
value.Stride,
value.Offset
);
material.Program.Attribute(attribute.Key).EnableVertexAttributeArray();
}
material.Program.Use();
if (material.Matrix4Uniforms != null)
{
foreach (var matrix in material.Matrix4Uniforms)
{
var m = matrix.Value;
material.Program.Uniform(matrix.Key).Set(ref m);
}
}
if (material.Int32Uniforms != null)
{
foreach (var pair in material.Int32Uniforms)
{
material.Program.Uniform(pair.Key).Set(pair.Value);
}
}
indicesBuffer.Bind();
for (int i = 0; i < textureCount; i++)
{
material.Program.Uniform("uSampler" + i).Set(i);
context.Textures[i] = textures[i];
}
int offset = 0;
int vertexCount = indicesCount;
context.DrawElements(WebGLDrawMode.TRIANGLES, offset, WebGLType.UNSIGNED_SHORT, vertexCount);
itemCount = 0;
indicesCount = 0;
textureCount = 0;
Flushed?.Invoke(this, EventArgs.Empty);
}
public RenderBatch(WebGLContext context, int elementCount)
{
this.context = context;
this.descriptor = new TDescriptor();
itemPool = new DefaultVertexFormat[elementCount * descriptor.ElementVertexCount];
modelBuffer = context.CreateBuffer(BufferType.ARRAY_BUFFER, BufferUsage.STREAM_DRAW);
modelBuffer.Bind();
modelBuffer.SetDataSize(itemPool.Length * descriptor.ByteSize);
System.Console.WriteLine("Buffer size: " + itemPool.Length * descriptor.ByteSize);
indicesBuffer = context.CreateBuffer(BufferType.ELEMENT_ARRAY_BUFFER, BufferUsage.STATIC_DRAW);
indicesBuffer.Bind();
indicesBuffer.SetData(descriptor.CreateIndices(elementCount));
textures = new Texture2D[10];
}