private void BufferAttributeData(ICollection <GlobalGeometrySectionStructBlock> sectionData)
{
var firstPass = true;
var index = 0;
MoonGL.VertexAttribArray(7, 7, 4, VertexAttribType.Float, false, 0, 1);
MoonGL.VertexAttribArray(8, 7, 4, VertexAttribType.Float, false, 16, 1);
MoonGL.VertexAttribArray(9, 7, 4, VertexAttribType.Float, false, 32, 1);
MoonGL.VertexAttribArray(10, 7, 4, VertexAttribType.Float, false, 48, 1);
foreach (var supportedFormat in SupportedVertexAttributes)
{
var bufferSize =
sectionData.SelectMany(e => e.VertexBuffers)
.Where(e => e.VertexBuffer.Type == supportedFormat)
.Sum(e => e.VertexBuffer.Data.Length);
int attributeSize = supportedFormat.GetSize( );
GL.BindBuffer(BufferTarget.ArrayBuffer, _attributeBuffers[supportedFormat]);
GL.BufferData(BufferTarget.ArrayBuffer, ( IntPtr )bufferSize, ( IntPtr )null,
BufferUsageHint.StaticDraw);
var offset = 0;
var vertexOffset = 0;
foreach (var renderModelSectionDataBlock in sectionData)
{
var vertexBuffer =
renderModelSectionDataBlock.VertexBuffers.Select(u => u.VertexBuffer)
.Single(e => e.Type == supportedFormat);
GL.BufferSubData(BufferTarget.ArrayBuffer, ( IntPtr )offset,
( IntPtr )vertexBuffer.Data.Length,
vertexBuffer.Data);
if (firstPass)
{
foreach (var part in renderModelSectionDataBlock.Parts)
{
SetVertexOffset(part, vertexOffset);
}
}
vertexOffset += vertexBuffer.VertexElementCount;
offset += vertexBuffer.Data.Length;
}
firstPass = false;
GL.BindVertexBuffer(index, _attributeBuffers[supportedFormat], ( IntPtr )0, attributeSize);
ConfigureVertexAttributeArray(supportedFormat, index);
index++;
}
}
/// <summary>
/// Calls glVertexAttribPointer to setup attributes for shaders and enables the vertex attribute array
/// </summary>
/// <param name="type">Type of attribute data</param>
/// <param name="bindingIndex"></param>
private static void ConfigureVertexAttributeArray(VertexAttributeType type, int bindingIndex)
{
switch (type)
{
case VertexAttributeType.UnpackedWorldCoordinateData:
MoonGL.VertexAttribArray(0, bindingIndex, 3, VertexAttribType.Float);
MoonGL.VertexAttribArray(1, bindingIndex, 4, VertexAttribType.Byte, false, 12);
MoonGL.VertexAttribArray(2, bindingIndex, 4, VertexAttribType.Float, false, 16);
break;
case VertexAttributeType.UnpackedTextureCoordinateData:
MoonGL.VertexAttribArray(3, bindingIndex, 2, VertexAttribType.Float);
break;
case VertexAttributeType.UnpackedLightingData:
MoonGL.VertexAttribArray(4, bindingIndex, 3, VertexAttribType.Float);
MoonGL.VertexAttribArray(5, bindingIndex, 3, VertexAttribType.Float, false, 12);
MoonGL.VertexAttribArray(6, bindingIndex, 3, VertexAttribType.Float, false, 24);
break;
case VertexAttributeType.CoordinateFloat:
MoonGL.VertexAttribArray(0, bindingIndex, 3, VertexAttribType.Float);
break;
case VertexAttributeType.TextureCoordinateFloat:
MoonGL.VertexAttribArray(3, bindingIndex, 2, VertexAttribType.Float);
break;
case VertexAttributeType.LightmapUVCoordinateOneXbox:
MoonGL.VertexAttribArray(11, bindingIndex, 2, VertexAttribType.Short, true);
break;
case VertexAttributeType.LightmapUVCoordinateTwoXbox:
MoonGL.VertexAttribArray(12, bindingIndex, 2, VertexAttribType.Short, true);
break;
default:
return;
}
}