public void SetPositions(PositionBuffer positions)
{
////TODO:如果用此方式，则必须先将此对象加入scene树，然后再调用Init
//OpenGL gl = this.TraverseToRootElement().ParentScene.OpenGL;
if (positionBuffer == null)
{
positionBuffer = new uint[1];
positionBuffer[0] = CreateVertexBufferObject(OpenGL.GL_ARRAY_BUFFER, positions, OpenGL.GL_STREAM_DRAW);
}
else
{
UpdateTextureCoords(positions);
}
}
protected void UpdatePositions(PositionBuffer positions)
{
gl.BindBuffer(OpenGL.GL_ARRAY_BUFFER, this.positionBuffer[0]);
IntPtr destVisibles = gl.MapBuffer(OpenGL.GL_ARRAY_BUFFER, OpenGL.GL_READ_WRITE);
MemoryHelper.CopyMemory(destVisibles, positions.Data, (uint)positions.SizeInBytes);
gl.UnmapBuffer(OpenGL.GL_ARRAY_BUFFER);
}
public HexahedronMeshGeometry3D(PositionBuffer positions, HalfHexahedronIndexBuffer triangleIndices)
:base(positions)
{
this.halfHexahedronIndices = triangleIndices;
}
