const float jointsDistance = 0.25f; //distance between two standard joints in brick (scale 1)
public override ProposedPosition GetPosition(Vector3 mousePosition, bool snapToGrid, float gridSize)
{
var simplePosition = base.GetPosition(mousePosition, false, gridSize);
brick.transform.position = simplePosition.position;
if (!(brick is AgaQBrick))
{
return(simplePosition);
}
//calculate distance betweeen two standard joints in screen space.
var joint1Pos = simplePosition.position + cam.transform.right * jointsDistance * brick.transform.localScale.x;
var joint2Pos = simplePosition.position - cam.transform.right * jointsDistance * brick.transform.localScale.x;
var jointsScreenDistance = (cam.WorldToScreenPoint(joint1Pos) - cam.WorldToScreenPoint(joint2Pos)).magnitude * 0.5f;
//transform our moving brick joints postions to screen space
var brickJoints = ProjectionTool.ProjectJoints(brick as AgaQBrick);
//get possible joints
var gameObjectsBehind = GetOtherBricks(mousePosition);
var possibleJoints = GetClosetsJoins(brickJoints, gameObjectsBehind, jointsScreenDistance);
//iterate over possible joints
foreach (var possibleJoint in possibleJoints)
{
if (CheckJoint(possibleJoint, snapToGrid))
{
return(new ProposedPosition(brick.transform, true, true));
}
}
if (!snapToGrid)
{
return(simplePosition);
}
return(base.GetPosition(mousePosition, snapToGrid, gridSize));
}
/// <summary>
/// Get joints from other brics that are close enouth to try join brick with.
/// List is sorted by distance after projeting to the plane.
/// </summary>
/// <param name="projectedDragingBrickJoints"></param>
/// <param name="positionTolerance">Position tolerance.</param>
/// <returns>The closets joins.</returns>
PossibleJoint[] GetClosetsJoins(ProjectedJoint[] projectedDragingBrickJoints, GameObject[] gameObjects, float positionTolerance)
{
List <PossibleJoint> possibleJoints = new List <PossibleJoint> ();
//iterate over all colliders
foreach (var otherGameObject in gameObjects)
{
//skip grid and itself
if (otherGameObject.tag == "background" || otherGameObject == this.brick.gameObject)
{
continue;
}
//check if collider is AgaQ brick
var otherBrick = otherGameObject.GetComponent <AgaQBrick> ();
if (otherBrick == null)
{
//try to get AgaQScript from parent
otherBrick = otherGameObject.GetComponentInParent <AgaQBrick>();
if (otherBrick == null)
{
continue;
}
}
//iterate over all brick joints
foreach (var otherBrickJoint in otherBrick.joints)
{
if (otherBrickJoint.other == null)
{
foreach (var projectedDragingBrickJoint in projectedDragingBrickJoints)
{
var projectedJoint = ProjectionTool.ProjectJoint(otherBrickJoint);
if (projectedDragingBrickJoint.Compare(projectedJoint, positionTolerance))
{
possibleJoints.Add(new PossibleJoint(projectedDragingBrickJoint, projectedJoint));
}
}
}
}
}
//draw possible joints in editor for debuging purpose
#if UNITY_EDITOR
foreach (var j in possibleJoints)
{
DebugExtension.DebugCircle(
j.projectedOtherJoint.joint.transform.position,
Color.red,
0.1f,
02.2f,
false
);
//Debug.DrawLine(
// j.projectedBrickJoint.joint.transform.position,
// j.projectedOtherJoint.joint.transform.position,
// Color.red,
// 0.2f,
// false
//);
}
#endif
//possibleJoints.OrderBy (x => x.cameraVectorDistance); // order joints by distance to camera
//possibleJoints.OrderBy (x => x.projectedDistance); // order joints by distance after project
//sort by brick to camera distance than by projected distance
possibleJoints.Sort((x, y) => {
if (x.projectedOtherJoint.joint.parentBrick != y.projectedOtherJoint.joint.parentBrick)
{
return(x.cameraVectorDistance.CompareTo(y.cameraVectorDistance));
}
return(x.projectedDistance.CompareTo(y.projectedDistance));
});
return(possibleJoints.ToArray());
}