internal static Vector3 GetRayOriginForOrthographicProjection(Vector2 normalizedMouseCoords)
{
float aspectRatio = (float)GLWindow.CurrentWindow.Width / (float)GLWindow.CurrentWindow.Height;
float xOffset = (2.0f * normalizedMouseCoords.X / (float)GLWindow.CurrentWindow.Width - 1) * (KWEngine.CurrentWorld.FOV / 2 * aspectRatio);
float yOffset = (-(2.0f * normalizedMouseCoords.Y / (float)GLWindow.CurrentWindow.Height - 1)) * (KWEngine.CurrentWorld.FOV / 2);
Vector3 lookAt;
Vector3 position;
if (KWEngine.CurrentWorld.IsFirstPersonMode && KWEngine.CurrentWorld.GetFirstPersonObject() != null)
{
position = KWEngine.CurrentWorld.GetFirstPersonObject().Position + KWEngine.WorldUp * KWEngine.CurrentWorld.GetFirstPersonObject().FPSEyeOffset;
lookAt = HelperCamera.GetLookAtVector();
}
else
{
position = KWEngine.CurrentWorld.GetCameraPosition();
lookAt = KWEngine.CurrentWorld.GetCameraLookAtVector();
}
Vector3 cameraRight = Vector3.NormalizeFast(Vector3.Cross(lookAt, KWEngine.WorldUp));
Vector3 cameraUp = Vector3.NormalizeFast(Vector3.Cross(cameraRight, lookAt));
Vector3 rayOrigin = position + cameraRight * xOffset + cameraUp * yOffset;
return(rayOrigin);
}
/// <summary>
/// Erfragt, ob der Mauszeiger (näherungsweise) auf dem Objekt liegt
/// </summary>
/// <param name="g">Zu untersuchendes GameObject</param>
/// <param name="ms">Mausinformationen</param>
/// <param name="offsetX">optionale Verschiebung des Cursors auf der X-Achse in Pixeln (Standard: 0)</param>
/// <param name="offsetY">optionale Verschiebung des Cursors auf der X-Achse in Pixeln (Standard: 0)</param>
/// <param name="precision">Genauigkeit der Prüfung (Standard: Box für eine genauere Prüfung)</param>
/// <returns>true, wenn der Mauszeiger auf dem Objekt liegt</returns>
public static bool IsMouseCursorInsideHitbox(GameObject g, MouseState ms, int offsetX = 0, int offsetY = 0, MouseIntersectionPrecision precision = MouseIntersectionPrecision.Box)
{
Vector2 mc = HelperGeneral.GetNormalizedMouseCoords(ms.X + offsetX, ms.Y + offsetY);
Vector3 worldRay = KWEngine.CurrentWindow.Get3DMouseCoords(mc.X, mc.Y);
Vector3 normal;
bool result;
Vector3 intersection;
if (KWEngine.CurrentWindow.CurrentWorld != null && KWEngine.CurrentWindow.CurrentWorld.IsFirstPersonMode)
{
normal = HelperCamera.GetLookAtVector();
normal.Y += 0.000001f;
normal.Z += 0.000001f;
if (KWEngine.Projection == ProjectionType.Perspective)
{
Vector3 fpPos = KWEngine.CurrentWindow.CurrentWorld.GetFirstPersonObject().Position;
fpPos.Y += KWEngine.CurrentWindow.CurrentWorld.GetFirstPersonObject().FPSEyeOffset;
result = GameObject.LinePlaneIntersection(out intersection, worldRay, fpPos, normal, g.GetCenterPointForAllHitboxes());
}
else
{
Vector3 fpPos = HelperGeneral.GetRayOriginForOrthographicProjection(mc);
result = GameObject.LinePlaneIntersection(out intersection, worldRay, fpPos, normal, g.GetCenterPointForAllHitboxes());
}
}
else
{
normal = -KWEngine.CurrentWindow.CurrentWorld.GetCameraLookAtVector();
normal.Y += 0.000001f;
normal.Z += 0.000001f;
if (KWEngine.Projection == ProjectionType.Perspective)
{
result = GameObject.LinePlaneIntersection(out intersection, worldRay, KWEngine.CurrentWindow.CurrentWorld.GetCameraPosition(), normal, g.GetCenterPointForAllHitboxes());
}
else
{
Vector3 rayOrigin = HelperGeneral.GetRayOriginForOrthographicProjection(mc);
result = GameObject.LinePlaneIntersection(out intersection, worldRay, rayOrigin, normal, g.GetCenterPointForAllHitboxes());
}
}
if (result)
{
foreach (Hitbox hb in g.Hitboxes)
{
if (precision == MouseIntersectionPrecision.Box)
{
if (IsPointInsideBox(ref intersection, hb))
{
return(true);
}
}
else
{
if (IsPointInsideSphere(ref intersection, hb.GetCenter(), hb.DiameterAveraged))
{
return(true);
}
}
}
return(false);
}
else
{
return(false);
}
}