private void SetGhostFaceAtFace(WorldObject target, TileFace resultFace)
{
var bb = target.ObjectType.TileData.GetBoundingBox();
var range = (bb.Max - bb.Min) * 0.5f;
Vector3 right;
Vector3 normal;
Vector3 up;
normal = TileSnapInformationBuilder.getFaceNormal(resultFace);
up = TileSnapInformationBuilder.getFaceUp(resultFace);
right = Vector3.Cross(up, normal);
range *= 2f;
Vector3 dim = new Vector3();
var ghostWidth = 0.01f;
dim += normal * ghostWidth;
dim += up * Vector3.Dot(up, range);
dim += right * Vector3.Dot(right, range);
dim.X = Math.Abs(dim.X);
dim.Y = Math.Abs(dim.Y);
dim.Z = Math.Abs(dim.Z);
ghostFace.Dimensions = dim;
ghostFace.PivotPoint = Vector3.One * 0.5f;
ghostFace.WorldMatrix = Matrix.CreateTranslation(normal * (Math.Abs(Vector3.Dot(normal, range * 0.5f)) + 0.01f)) * target.WorldMatrix;
}
private TileFace RaycastTileFace(IXNAGame _game, WorldObject target)
{
var bb = target.ObjectType.TileData.GetBoundingBox();
var range = (bb.Max - bb.Min) * 0.5f;
Ray ray;
var targetMatrix = Matrix.Invert(target.WorldMatrix);
ray = _game.GetWereldViewRay(_game.Mouse.CursorPositionVector);
ray.Position = Vector3.Transform(ray.Position, targetMatrix);
ray.Direction = Vector3.TransformNormal(ray.Direction, targetMatrix);
raycasterFace.Reset();
Vector3 normal;
Vector3 up;
Vector3 right;
for (int i = 0; i < 6; i++)
{
var face = (TileFace)(i + 1);
normal = TileSnapInformationBuilder.getFaceNormal(face);
up = TileSnapInformationBuilder.getFaceUp(face);
right = Vector3.Cross(up, normal);
var scaledNormal = normal * Math.Abs(Vector3.Dot(normal, range));
var scaledUp = up * Math.Abs(Vector3.Dot(up, range));
var scaledRight = right * Math.Abs(Vector3.Dot(right, range));
var v1 = scaledNormal + scaledUp +
scaledRight;
var v2 = scaledNormal + scaledUp -
scaledRight;
var v3 = scaledNormal - scaledUp +
scaledRight;
var v4 = scaledNormal - scaledUp -
scaledRight;
float?result;
Functions.RayIntersectsSquare(ref ray, ref v1, ref v2, ref v3, ref v4, out result);
raycasterFace.AddResult(result, face);
}
return(raycasterFace.ClosestObject);
}
