public unsafe void BindArrayBuffer <T>(T[] verts, int stride, int[] attributeLengths, int[] attributeOffsets, BufferUsageHint hint = BufferUsageHint.GL_STATIC_DRAW) where T : IInterleavedVertex
{
GlBindings.GenVertexArrays(1, out m_VaoId);
GlBindings.GenBuffers(1, out m_VertexArrayBufferId);
GlBindings.BindVertexArray(m_VaoId);
GCHandle handle = GCHandle.Alloc(verts, GCHandleType.Pinned);
IntPtr ptrVerticies = handle.AddrOfPinnedObject();
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, m_VertexArrayBufferId);
GlBindings.BufferData(BufferTarget.GL_ARRAY_BUFFER, stride * verts.Length, ptrVerticies, hint);
handle.Free();
// Setup Attributes
for (int i = 0; i < attributeLengths.Length; i++)
{
GlBindings.VertexAttribPointer(i, attributeLengths[i], VertexAttribPointerType.Float, 0, stride, attributeOffsets[i]);
GlBindings.EnableVertexAttribArray(i);
}
m_VertexCount = verts.Length;
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, 0);
GlBindings.BindVertexArray(0);
}
/// <summary>
/// Initalises the Vertex Array Object without seting any vertex or index data
/// </summary>
public unsafe void InitElementsArrayBuffer <T>(int stride, int[] attributeLengths, int[] attributeOffsets, BufferUsageHint hint = BufferUsageHint.GL_STATIC_DRAW) where T : IInterleavedVertex
{
GlBindings.GenVertexArrays(1, out m_VaoId);
GlBindings.GenBuffers(1, out m_VertexArrayBufferId);
GlBindings.GenBuffers(1, out m_IndexBufferId);
GlBindings.BindVertexArray(m_VaoId);
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, m_VertexArrayBufferId);
GlBindings.BindBuffer(BufferTarget.GL_ELEMENT_ARRAY_BUFFER, m_IndexBufferId);
// Setup Attributes
for (int i = 0; i < attributeLengths.Length; i++)
{
GlBindings.VertexAttribPointer(i, attributeLengths[i], VertexAttribPointerType.Float, 0, stride, attributeOffsets[i]);
GlBindings.EnableVertexAttribArray(i);
}
//m_VertexCount = indicies.Length;
m_Stride = stride;
m_BufferUsage = hint;
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, 0);
GlBindings.BindVertexArray(0);
}