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 EnablePrimitiveRestart(GraphicsContext ctx, uint index)
{
if (ctx == null)
{
throw new ArgumentNullException("ctx");
}
if (ctx.IsCurrent)
{
throw new ArgumentException("not current", "ctx");
}
if (ctx.Caps.GlExtensions.PrimitiveRestart)
{
// Enable primitive restart (server state)
Gl.Enable(EnableCap.PrimitiveRestart);
// Specify restart index
Gl.PrimitiveRestartIndex(index);
}
else if (ctx.Caps.GlExtensions.PrimitiveRestart_NV)
{
// Enable primitive restart (client state)
Gl.EnableClientState(EnableCap.PrimitiveRestartNv);
// Specify restart index
Gl.PrimitiveRestartIndexNV(index);
}
else
{
throw new InvalidOperationException("primitive restart not supported");
}
}
private void DrawLines2f_GL_1_1(Vertex2f[] vertices)
{
if ((vertices.Length % 2) != 0)
{
throw new ArgumentException("length not a multiple of 2", "vertices");
}
using (MemoryLock memoryLock = new MemoryLock(vertices)) {
// Setup arrays
Gl.VertexPointer(2, VertexPointerType.Float, 0, memoryLock.Address);
Gl.EnableClientState(EnableCap.VertexArray);
// Draw arrays
Gl.DrawArrays(PrimitiveType.Lines, 0, vertices.Length);
}
}