private void SetNormalAttribute(GraphicsContext ctx)
{
if (ArrayBuffer != null)
{
ArrayBufferObjectBase.IArraySection arraySection = ArrayBuffer.GetArraySection(ArraySectionIndex);
int arrayLength = (int)ArrayBufferItem.GetArrayLength(arraySection.ItemType);
if (arrayLength != 3)
{
throw new NotSupportedException(String.Format("normal pointer of length {0} not supported", arrayLength));
}
// Bind the array buffer
ArrayBuffer.Bind(ctx);
// Set vertex pointer
Gl.NormalPointer(
ArrayBufferItem.GetNormalPointerType(arraySection.ItemType), arraySection.Stride.ToInt32(),
arraySection.Pointer
);
// Enable vertex attribute
Gl.EnableClientState(EnableCap.NormalArray);
}
else
{
Gl.DisableClientState(EnableCap.NormalArray);
}
}
private void SetTexCoordAttribute(GraphicsContext ctx)
{
if (ArrayBuffer != null)
{
ArrayBufferObjectBase.IArraySection arraySection = ArrayBuffer.GetArraySection(ArraySectionIndex);
int arrayLength = (int)ArrayBufferItem.GetArrayLength(arraySection.ItemType);
int arrayStride = arraySection.Stride.ToInt32();
// Bind the array buffer
ArrayBuffer.Bind(ctx);
// Set vertex pointer
Gl.TexCoordPointer(
arrayLength, ArrayBufferItem.GetTexCoordPointerType(arraySection.ItemType), arraySection.Stride.ToInt32(),
arraySection.Pointer
);
// Enable vertex attribute
Gl.EnableClientState(EnableCap.TextureCoordArray);
}
else
{
Gl.DisableClientState(EnableCap.TextureCoordArray);
}
}
public static void DisablePrimitiveRestart(GraphicsContext ctx)
{
if (ctx == null)
{
throw new ArgumentNullException("ctx");
}
if (ctx.Caps.GlExtensions.PrimitiveRestart)
{
// Enable primitive restart (server state)
Gl.Disable(EnableCap.PrimitiveRestart);
}
else if (ctx.Caps.GlExtensions.PrimitiveRestart_NV)
{
// Enable primitive restart (client state)
Gl.DisableClientState(EnableCap.PrimitiveRestartNv);
}
else
{
throw new InvalidOperationException("primitive restart not supported");
}
}
