public void UpdateMesh <T>(T[] indices, PrimitiveType primitive) where T : struct
{
GL.BindVertexArray(0);
Primitive = primitive;
ElementCount = indices.Length * PrimitiveHelper.GetElementCountForPrimitive(primitive);
_indexBuffer.BufferSubData(BufferTarget.ElementArrayBuffer, indices, ElementCount * sizeof(int), IntPtr.Zero);
}
public void SetMesh <T>(Vector3[] vertices, Vector3[] normals, T[] indices, PrimitiveType primitive) where T : struct
{
if (vertices == null || indices == null)
{
throw new ArgumentNullException();
}
if (vertices.Length == 0 || indices.Length == 0)
{
throw new ArgumentException("Invalid vertices or faces count");
}
// compute the number of vertices
ElementCount = indices.Length * PrimitiveHelper.GetElementCountForPrimitive(primitive);
Primitive = primitive;
// send the vertices, normals and indices to the buffer.
_vertexBuffer.BufferData(BufferTarget.ArrayBuffer, vertices, vertices.Length * Vector3.SizeInBytes);
_indexBuffer.BufferData(BufferTarget.ElementArrayBuffer, indices, ElementCount * sizeof(int));
if (normals != null && normals.Length != 0)
{
_normalBuffer.BufferData(BufferTarget.ArrayBuffer, normals, vertices.Length * Vector3.SizeInBytes);
}
// Remove the old Vertex array, if any, and construct a new one.
if (_vaoHandle.Handle != 0)
{
_vaoHandle.Dispose();
_vaoHandle = new VertexArray();
}
// bind the buffers to the VertexArray
_vaoHandle.BindBuffers(_vertexBuffer, _normalBuffer, _indexBuffer);
}
public void UpdateMesh <T>(T[] indices, PrimitiveType primitive) where T : struct
{
if (primitive != Primitive)
{
throw new InvalidOperationException();
}
// Unbind the previous vertex array.
GL.BindVertexArray(0); // Important! 4 Hours wasted!
Primitive = primitive;
// update the buffer
ElementCount = indices.Length * PrimitiveHelper.GetElementCountForPrimitive(primitive);
_indexBuffer.BufferSubData(BufferTarget.ElementArrayBuffer, indices, ElementCount * sizeof(int), IntPtr.Zero);
}
public void SetMesh <T>(DataBuffer vertices, DataBuffer normals, T[] indices, PrimitiveType primitive) where T : struct
{
Primitive = primitive;
ElementCount = PrimitiveHelper.GetElementCountForPrimitive(primitive) * indices.Length;
_vaoHandle?.Dispose();
_vaoHandle = new VertexArray();
if (indices.Length == 0)
{
ElementCount = 0;
return;
}
// ignore the normals on lines and points
_vaoHandle.BindBuffers(vertices, PrimitiveHelper.GetElementCountForPrimitive(primitive) <= 2 ? null : normals, _indexBuffer);
_indexBuffer.BufferData(BufferTarget.ElementArrayBuffer, indices, ElementCount * sizeof(int));
}