private void Pick()
{
Viewport vp = mGraphics.GraphicsDevice.Viewport;
mGraphics.GraphicsDevice.Viewport = mInput.Viewport;
mPickBuffer.PushMatrix(MatrixMode.View, ViewMatrix);
mPickBuffer.PushMatrix(MatrixMode.Projection, ProjectionMatrix);
mPickBuffer.PushMatrix(MatrixMode.World, WorldMatrix);
mPickBuffer.PushVertexDeclaration(mVertexDeclaration);
foreach (TransformationMode mode in mDrawFunctions.Keys)
{
TransformationMode local_mode = mode;
if ((mEnabledModes & local_mode) != local_mode)
{
continue;
}
foreach (AxisFlags flags in mDrawFunctions[local_mode].Keys)
{
AxisFlags local_flags = flags;
mPickBuffer.PushPickID(((uint)local_mode << 8) | (uint)flags);
mPickBuffer.QueueRenderFunction(delegate(GraphicsDevice device)
{
mDrawFunctions[local_mode][local_flags](local_flags);
});
mPickBuffer.PopPickID();
}
}
mPickBuffer.PopVertexDeclaration();
mPickBuffer.PopMatrix(MatrixMode.View);
mPickBuffer.PopMatrix(MatrixMode.Projection);
mPickBuffer.PopMatrix(MatrixMode.World);
// render the pick buffer queue
mPickBuffer.Render();
// pick using current mouse position and convert picked
// value back into an Axis value (safe, as the default pick buffer
// id is 0 (AxisFlags.None) and only AxisFlags values are being rendered as
// pick ids in the above render pass
uint pick_id = mPickBuffer.Pick(mInput.X, mInput.Y);
mSelectedAxes = (AxisFlags)(pick_id & 0xFF);
mActiveMode = (TransformationMode)((pick_id >> 8) & 0xFF);
mGraphics.GraphicsDevice.Viewport = vp;
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (mManipulator.Focused)
{
return;
}
if ((GraphicsDevice == null) || GraphicsDevice.IsDisposed)
{
return;
}
Viewport vp = GraphicsDevice.Viewport;
GraphicsDevice.Viewport = mInput.Viewport;
mPickBuffer.PushMatrix(MatrixMode.View, camera.ViewMatrix);
mPickBuffer.PushMatrix(MatrixMode.Projection, camera.ProjectionMatrix);
//draw each Component into pick buffer
foreach (XComponent comp in X.Components)
{
comp.DrawPick(mPickBuffer, camera);
}
mPickBuffer.PopMatrix(MatrixMode.View);
mPickBuffer.PopMatrix(MatrixMode.Projection);
mPickBuffer.Render();
uint pick_id = mPickBuffer.Pick(e.X, e.Y);
//find the xcomponent we selected
XComponent component = X.Components.Find(delegate(XComponent obj) { return(obj.ComponentID == pick_id); });
if (component != null && (component is XITransform))
{//we selected a valid component we should update our windows UI
mManipulator.Transform = (XITransform)component;
//fire change event
if (OnSelectedComponentChange != null)
{
OnSelectedComponentChange(this, component);
}
}
this.GraphicsDevice.Viewport = vp;
}
