/// <summary>
/// Transforms Screen coordinates into World coordinates.
/// World space includes the camera transform of the camera closest to
/// the input coordinate.
/// In 2D setups, the world z coordinate is always set to 0.
/// </summary>
public float3 TranslateScreenToWorld(float2 screenCoord)
{
// TODO: this should not live in input, but keep it for now for compat
var env = World.TinyEnvironment();
DisplayInfo di = env.GetConfigData <DisplayInfo>();
Rect screenRect = new Rect(0, 0, (float)di.width, (float)di.height);
float3 result = float3.zero;
float2 windowSize = new float2((float)di.width, (float)di.height);
float bestdepth = Single.NegativeInfinity;
Entities.ForEach((Entity e, ref Camera2D c2d, ref LocalToWorld xform) =>
{
Rect cRect;
if (c2d.rect.IsEmpty())
{
cRect = new Rect(0, 0, 1, 1);
}
else
{
cRect = c2d.rect;
}
cRect = screenRect.Region(cRect);
if (cRect.Contains(screenCoord))
{
if (c2d.depth > bestdepth)
{
result = TransformHelpers.WindowToWorld(this, e, screenCoord, windowSize);
bestdepth = c2d.depth;
}
}
});
return(result);
}
float3 GetWorldPosition(float2 screenPosition)
{
var env = World.TinyEnvironment();
var displayInfo = env.GetConfigData <DisplayInfo>();
var inputSystem = World.GetExistingSystem <InputSystem>();
var cameraEntity = Entity.Null;
Entities.WithAll <Camera2D>().ForEach((Entity entity) => { cameraEntity = entity; });
var windowPosition = new float2(screenPosition.x, screenPosition.y);
var windowSize = new float2(displayInfo.width, displayInfo.height);
return(TransformHelpers.WindowToWorld(this, cameraEntity, windowPosition, windowSize));
}
