/// <summary>
/// Remove a wall from consideration in collision calculations.
/// Recommended if the wall is disabled or in a different part of the level, etc.
/// </summary>
/// <access>public void</access>
/// <param name="wall">The wall to be removed</param>
public void RemoveWall(CameraWall wall)
{
activeWalls.Remove(wall);
}
/// <summary>
/// Get the required offset from a position to ensure the camera view area is not overlapping any active walls
/// </summary>
/// <param name="targetPoint">The center of the camera view area</param>
/// <returns>The offset from targetPoint at which point no overlaps are occuring</returns>
public Vector2 GetOffset(Vector2 targetPoint)
{
Rect cameraRect = Extension.WorldRect;
Vector2 offset = Vector2.zero;
// Iterate through active walls
for (int i = 0; i < activeWalls.Count; i++)
{
CameraWall wall = activeWalls[i];
// Skip walls with mode None
if (wall.mode == CameraWall.WallMode.None)
{
continue;
}
// Take current offset into account
cameraRect.center = targetPoint + offset;
// Wide X overlap -> Y correction
// Wide Y overlap -> X correction
Rect wallRect = wall.WorldRect;
Vector2 overlap;
// Get overlap values
overlap.x = cameraRect.width - Mathf.Max(0, (cameraRect.xMax - wallRect.xMax)) - Mathf.Max(0, (wallRect.xMin - cameraRect.xMin));
overlap.y = cameraRect.height - Mathf.Max(0, (cameraRect.yMax - wallRect.yMax)) - Mathf.Max(0, (wallRect.yMin - cameraRect.yMin));
overlap.x = Mathf.Max(0, overlap.x);
overlap.y = Mathf.Max(0, overlap.y);
// Skip this wall if it isn't actually overlapping
if (overlap.x == 0 || overlap.y == 0)
{
continue;
}
// Decide which axis to correct based on mode
// Solid -> based on larger overlap
// Horizontal / Vertical -> always correct that axis
bool correctVertical = wall.mode == CameraWall.WallMode.Vertical || wall.mode == CameraWall.WallMode.Solid && overlap.x > overlap.y;
bool correctHorizontal = wall.mode == CameraWall.WallMode.Horizontal || wall.mode == CameraWall.WallMode.Solid && !correctVertical;
if (correctVertical) // Add to vertical offset
{
float dy;
// Correct up or down depending on relative position
if (cameraRect.center.y > wallRect.center.y)
{
dy = wallRect.yMax - cameraRect.yMin;
}
else
{
dy = wallRect.yMin - cameraRect.yMax;
}
offset += dy * Vector2.up;
}
if (correctHorizontal)
{
float dx;
// Correct right or left depending on relative position
if (cameraRect.center.x > wallRect.center.x)
{
dx = wallRect.xMax - cameraRect.xMin;
}
else
{
dx = wallRect.xMin - cameraRect.xMax;
}
offset += dx * Vector2.right;
}
}
return(offset);
}
/// <summary>
/// Add a wall to be considered in collision calculations
/// </summary>
/// <access>public void</access>
/// <param name="wall">The wall to be added</param>
public void AddWall(CameraWall wall)
{
activeWalls.Add(wall);
}