/// <summary>
/// Construct an ArrayBufferObjectInterleaved specifying its item layout on CPU side.
/// </summary>
/// <param name="arrayItemType">
/// A <see cref="Type"/> describing the type of the array item.
/// </param>
/// <param name="hint">
/// An <see cref="BufferObjectHint"/> that specify the data buffer usage hints.
/// </param>
public ArrayBufferObjectInterleaved(Type arrayItemType, BufferObjectHint hint) :
base(arrayItemType, hint)
{
// Get fields for defining array item definition
FieldInfo[] arrayItemTypeFields = arrayItemType.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
if (arrayItemTypeFields.Length == 0)
{
throw new ArgumentException("no public fields", "arrayItemType");
}
// Determine array sections stride
int structStride = Marshal.SizeOf(arrayItemType);
for (int i = 0; i < arrayItemTypeFields.Length; i++)
{
FieldInfo arrayItemTypeField = arrayItemTypeFields[i];
ArraySection arraySection = new ArraySection(this, arrayItemTypeField.FieldType);
// Determine array section offset
arraySection.ItemOffset = Marshal.OffsetOf(arrayItemType, arrayItemTypeField.Name);
// Determine array section stride
arraySection.ItemStride = new IntPtr(structStride);
// Mission Normalized property management: add attributes?
arraySection.Normalized = false;
ArraySections.Add(arraySection);
}
// Determine array item size
ItemSize = (uint)structStride;
}
/// <summary>
/// Construct an ArrayBufferObjectInterleaved specifying its item layout on CPU side.
/// </summary>
/// <param name="arrayItemType">
/// A <see cref="Type"/> describing the type of the array item.
/// </param>
/// <param name="hint">
/// An <see cref="BufferObjectHint"/> that specify the data buffer usage hints.
/// </param>
public ArrayBufferObjectPacked(Type arrayItemType, BufferObjectHint hint) :
base(arrayItemType, hint)
{
// Get fields for defining array item definition
FieldInfo[] arrayItemTypeFields = arrayItemType.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
if (arrayItemTypeFields.Length == 0)
{
throw new ArgumentException("no public fields", "arrayItemType");
}
// Allocate type information arrays
_FieldsSize = new uint[arrayItemTypeFields.Length];
_FieldsOffset = new IntPtr[arrayItemTypeFields.Length];
_ClientBufferOffsets = new IntPtr[arrayItemTypeFields.Length];
_BufferOffsets = new IntPtr[arrayItemTypeFields.Length];
// Determine array sections stride
int structStride = Marshal.SizeOf(arrayItemType);
for (int i = 0; i < arrayItemTypeFields.Length; i++)
{
FieldInfo arrayItemTypeField = arrayItemTypeFields[i];
ArraySection arraySection = new ArraySection(this, arrayItemTypeField.FieldType);
// Store field size: used for re-computing section offsets
_FieldsSize[i] = (uint)Marshal.SizeOf(arrayItemTypeField.FieldType);
// Store field offset: used for locating field in input arrays
_FieldsOffset[i] = Marshal.OffsetOf(arrayItemType, arrayItemTypeField.Name);
// Array section offset is re-computed each time the item count is defined
arraySection.ItemOffset = IntPtr.Zero;
// Determine array section stride
arraySection.ItemStride = new IntPtr(_FieldsSize[i]);
// Mission Normalized property management: add attributes?
arraySection.Normalized = false;
ArraySections.Add(arraySection);
}
// Determine array item size
ItemSize = (uint)structStride;
}
