public CollisionLocation Constrain3DObject(Transform objectTransform, bool collisionInfoOnly = false)
{
yMidPoint = new Vector3(FrustumCorners[3].x, objectTransform.position.y, FrustumCorners[3].z);
xMidPoint = FrustumCorners[3] - (FrustumCorners[3] - FrustumCorners[1]).normalized * Vector3.Distance(objectTransform.position, yMidPoint);
float hDist = Vector3.Distance(yMidPoint, objectTransform.position);
float vDist = Vector3.Distance(xMidPoint, objectTransform.position);
float hDirDot = Vector3.Dot((yMidPoint - objectTransform.position).normalized, objectTransform.right);
float vDirDot = Vector3.Dot((xMidPoint - objectTransform.position).normalized, objectTransform.up);
hDist *= hDirDot < 0f ? -1f : 1f;
vDist *= vDirDot < 0f ? -1f : 1f;
CollisionLocation location = CollisionLocation.None;
if (hDist <= 0f)
{
if (!collisionInfoOnly)
{
objectTransform.position = new Vector3(yMidPoint.x, objectTransform.position.y, yMidPoint.z);
}
location ^= CollisionLocation.Right;
}
if (hDist >= HorizontalDistance)
{
if (!collisionInfoOnly)
{
objectTransform.position = new Vector3(FrustumCorners[0].x, objectTransform.position.y, FrustumCorners[0].z);
}
location ^= CollisionLocation.Left;
}
if (vDist <= 0f)
{
if (!collisionInfoOnly)
{
objectTransform.position = new Vector3(objectTransform.position.x, xMidPoint.y, objectTransform.position.z);
}
location ^= CollisionLocation.Top;
}
if (vDist >= VerticalDistance)
{
if (!collisionInfoOnly)
{
objectTransform.position = new Vector3(objectTransform.position.x, FrustumCorners[0].y, objectTransform.position.z);
}
location ^= CollisionLocation.Bottom;
}
return(location);
}
public static CollisionLocation RestrictToScreenBoundary(Camera camera, Transform transform, bool collisionDataOnly = false)
{
if (!camera)
{
return(CollisionLocation.None);
}
CollisionLocation col = CollisionLocation.None;
Vector3 viewportPos = camera.WorldToViewportPoint(transform.position);
if (viewportPos.x <= 0f)
{
viewportPos.x = 0f;
col ^= CollisionLocation.Left;
}
if (viewportPos.x >= 1f)
{
viewportPos.x = 1f;
col ^= CollisionLocation.Right;
}
if (viewportPos.y <= 0f)
{
viewportPos.y = 0f;
col ^= CollisionLocation.Bottom;
}
if (viewportPos.y >= 1f)
{
viewportPos.y = 1f;
col ^= CollisionLocation.Top;
}
if (!collisionDataOnly)
{
transform.position = camera.ViewportToWorldPoint(viewportPos);
}
return(col);
}
