public override void OnGUI()
{
ImGui.Begin("Viewport");
if (ECSScene.Camera == null)
{
ImGui.Text("Camera missing.");
ImGui.End();
}
var l = ImGui.GetWindowContentRegionMin();
var h = ImGui.GetWindowContentRegionMax();
var size = h - l;
ECSScene.RenderTexture.Size = size;
ImGui.Image(new IntPtr(ECSScene.RenderTexture.ResolveTex), size,
new(0, 1), new(1, 0));
// This renders the texture technically upside-down how OpenGL sees it
// but since OpenGL textures are already upside-down it's uno reverse carding opengl's flip and it's normal now
var wp = ImGui.GetWindowPos();
ImGuizmo.Enable(ImGui.IsMouseHoveringRect(wp, wp + size));
// Gizmos
var dl = ImGui.GetForegroundDrawList();
ImGuizmo.SetOrthographic(false);
var cr = ImGui.GetWindowContentRegionMax();
ImGuizmo.SetRect(wp.X, wp.Y, cr.X, cr.Y);
ImGuizmo.SetDrawlist(dl);
if (Editor.SelectedObject != null && Editor.ObjectSelected)
{
var v = ECSScene.Camera.View();
var p = ECSScene.Camera.Projection();
var a = Editor.SelectedObject.ModelMatrix;
var op = Toolbar.ActiveMode switch
{
MovementMode.Translate => OPERATION.TRANSLATE,
MovementMode.Rotate => OPERATION.ROTATE,
_ => OPERATION.TRANSLATE
};
var m = ImGuizmo.Manipulate(ref v.Row0.X, ref p.Row0.X, op, MODE.LOCAL, ref a.Row0.X);
if (m)
{
Editor.SelectedObject.ModelMatrix = a;
}
}
ImGui.End();
}
}