/// Helper function to create a top level icon.
/// The root icon does not have any interaction or icon
/// ShowRootIcon() initializes the root icon and opens the next level of icons.
private ConstellationMenuIcon ShowRootIcon()
{
ConstellationMenuIcon rootIcon = (ConstellationMenuIcon)Instantiate(menuIconPrefab, transform);
rootIcon.transform.position = menuCenter;
rootIcon.transform.rotation = menuOrientation;
rootIcon.Initialize(this, menuTree.tree.Root, MENU_SCALE);
ConstellationMenuIcon.ShowMenu(this, menuTree.tree.Root, rootIcon, menuOrientation,
MENU_SCALE);
rootIcon.SetDummy();
if (OnMenuOpened != null)
{
OnMenuOpened.Invoke();
}
return(rootIcon);
}
/// Creates and shows a layer of icons below this one.
/// Returns true if a fade needs to occur.
public static bool ShowMenu(ConstellationMenuRoot root, AssetTree.Node treeNode, ConstellationMenuIcon parent,
Quaternion orientation, float scale,
IconState initialState = IconState.Shown)
{
// Determine how many children are in the sub-menu
List <AssetTree.Node> childItems = treeNode.children;
// If this is the end of a menu, invoke the action and return early
if (childItems.Count == 0)
{
root.MakeSelection(parent.menuItem);
root.CloseAll();
return(false);
}
if (parent.childMenus.Count == childItems.Count)
{
// children already exist. just fade them in.
bool stateChanged = false;
foreach (ConstellationMenuIcon child in parent.childMenus)
{
if (child.StartFade(initialState))
{
stateChanged = true;
}
// Close any children.
child.FadeChildren(IconState.Closed);
}
return(stateChanged);
}
List <Vector3> childPositions;
float radius;
if (parent.parentMenu != null)
{
radius = (parent.menuCenter - parent.startPosition).magnitude + ITEM_SPACING;
childPositions = ArrangeInCircle(childItems.Count, radius,
parent.angleToRoot - Mathf.PI * .5f,
parent.angleToRoot + Mathf.PI * .5f,
ITEM_SPACING);
}
else
{
// Radius needs to expand when there are more icons
radius = ITEM_SPACING * Mathf.Max(childItems.Count, MIN_ITEM_SPACE) / (2.0f * Mathf.PI);
// add one unused position to item positions
childPositions = ArrangeInCircle(childItems.Count + 1, radius);
}
for (int i = 0; i < childItems.Count; ++i)
{
Vector3 posOffset = childPositions[i];
ConstellationMenuIcon childMenu = (ConstellationMenuIcon)Instantiate(root.menuIconPrefab, root.transform);
childMenu.transform.position = parent.menuCenter + (orientation * posOffset);
childMenu.transform.rotation = orientation;
childMenu.transform.localScale = Vector3.one * scale;
childMenu.Initialize(root, parent, childItems[i], parent.menuCenter, scale, initialState);
childMenu.angleToRoot = Mathf.Atan2(posOffset[1], posOffset[0]);
}
return(true);
}
