private void DrawViewport()
{
var size = ImGui.GetWindowSize();
if (Pipeline.Width != (int)size.X || Pipeline.Height != (int)size.Y)
{
Pipeline.Width = (int)size.X;
Pipeline.Height = (int)size.Y;
Pipeline.OnResize();
}
Pipeline.RenderScene();
if ((ImGui.IsWindowFocused() && _mouseDown) ||
ImGui.IsWindowFocused() && ImGui.IsWindowHovered() || _mouseDown)
{
if (!onEnter)
{
Pipeline.ResetPrevious();
onEnter = true;
}
//Only update scene when necessary
if (ImGuiController.ApplicationHasFocus)
{
UpdateCamera();
}
}
else
{
onEnter = false;
//Reset drag/dropped model data if mouse leaves the viewport during a drag event
if (DragDroppedModel != null)
{
DragDroppedModel.DragDroppedOnLeave();
DragDroppedModel = null;
}
}
var id = Pipeline.GetViewportTexture();
ImGui.Image((IntPtr)id, size, new System.Numerics.Vector2(0, 1), new System.Numerics.Vector2(1, 0));
if (ImGui.BeginDragDropTarget())
{
ImGuiPayloadPtr outlinerDrop = ImGui.AcceptDragDropPayload("OUTLINER_ITEM",
ImGuiDragDropFlags.AcceptNoDrawDefaultRect | ImGuiDragDropFlags.AcceptBeforeDelivery);
if (outlinerDrop.IsValid())
{
//Drag/drop things onto meshes
var mouseInfo = CreateMouseState();
var picked = Pipeline.GetPickedObject(mouseInfo);
//Picking object changed.
if (DragDroppedModel != picked)
{
//Set exit drop event for previous model
if (DragDroppedModel != null)
{
DragDroppedModel.DragDroppedOnLeave();
}
DragDroppedModel = picked;
//Model has changed so call the enter event
if (picked != null)
{
picked.DragDroppedOnEnter();
}
}
if (picked != null)
{
//Set the drag/drop event
var node = Outliner.GetDragDropNode();
picked.DragDropped(node.Tag);
}
if (mouseInfo.LeftButton == ButtonState.Released)
{
DragDroppedModel = null;
}
}
ImGui.EndDragDropTarget();
}
}
