//join with other shape by FixedJoint2D
public bool JoinTo(MeshBase otherMesh)
{
FixedJoint2D C_FJ2D = gameObject.AddComponent <FixedJoint2D>();
C_FJ2D.connectedBody = otherMesh.GetComponent <Rigidbody2D>();
if (C_FJ2D.connectedBody == null)
{
return(false);
}
C_FJ2D.anchor = transform.InverseTransformPoint(transform.position);
C_FJ2D.anchor = otherMesh.transform.InverseTransformPoint(otherMesh.transform.position);
return(true);
}
//joins two shapes by FixedJoint2D
public static bool Join(MeshBase meshA, MeshBase meshB)
{
FixedJoint2D C_FJ2D = meshA.gameObject.AddComponent <FixedJoint2D>();
C_FJ2D.connectedBody = meshB.GetComponent <Rigidbody2D>();
if (C_FJ2D.connectedBody)
{
return(false);
}
C_FJ2D.anchor = meshA.transform.InverseTransformPoint(meshA.transform.position);
C_FJ2D.anchor = meshB.transform.InverseTransformPoint(meshB.transform.position);
return(true);
}
private void ConnectBody(RaycastHit2D hit)
{
//assign hit object's Rigidbody to {connectedBody}
connectedBody = hit.collider.GetComponent <Rigidbody2D>();
//save its drag
oldDrag = connectedBody.drag;
connectedBody.drag = 10f;
//attach SpringJoint to hit collider
C_SP2D = hit.collider.gameObject.AddComponent <SpringJoint2D>();
C_SP2D.autoConfigureDistance = false;
C_SP2D.distance = 0;
C_SP2D.dampingRatio = 1f;
C_SP2D.frequency = 5f;
//choose the place to anchor spring joint
if (attachToCenterOfMass)
{
MeshBase connectedMeshBase = hit.collider.GetComponent <MeshBase>();
//check if selected Rigidbody has MeshBase derived component
if (connectedMeshBase != null)
{
//GetCenter overrides object origin
C_SP2D.anchor = connectedBody.transform.InverseTransformPoint(connectedMeshBase.transform.position);
}
else
{
//set to generated center of mass
C_SP2D.anchor = connectedBody.transform.InverseTransformPoint(connectedBody.transform.position);
}
}
else
{
//set anchor to point of hit
C_SP2D.anchor = connectedBody.transform.InverseTransformPoint(hit.point);
}
}
void Update()
{
if (Input.GetMouseButtonDown(0))
{
//raycast from mouse pointer
RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
if (hit.collider != null)
{
//if we hit something...
if (hit.collider.GetComponent <Rigidbody2D>())
{
//...and it has Rigidbody2D
//assign hit object's Rigidbody to {connectedBody}
connectedBody = hit.collider.GetComponent <Rigidbody2D>();
//save its drag
oldDrag = connectedBody.drag;
connectedBody.drag = 10f;
//attach SpringJoint to hit collider
C_SP2D = hit.collider.gameObject.AddComponent <SpringJoint2D>();
C_SP2D.autoConfigureDistance = false;
C_SP2D.distance = 0;
C_SP2D.dampingRatio = 1f;
C_SP2D.frequency = 5f;
//choose the place to anchor spring joint
if (attachToCenterOfMass)
{
MeshBase connectedMeshBase = hit.collider.GetComponent <MeshBase>();
//check if selected Rigidbody has MeshBase derived component
if (connectedMeshBase != null)
{
//GetCenter overrides object origin
C_SP2D.anchor = connectedBody.transform.InverseTransformPoint(connectedMeshBase.transform.position);
}
else
{
//set to generated center of mass
C_SP2D.anchor = connectedBody.transform.InverseTransformPoint(connectedBody.transform.position);
}
}
else
{
//set anchor to point of hit
C_SP2D.anchor = connectedBody.transform.InverseTransformPoint(hit.point);
}
}
}
}
if (Input.GetMouseButtonUp(0))
{
if (connectedBody != null)
{
//remove joint from body
Destroy(C_SP2D);
connectedBody.gravityScale = 1;
connectedBody.drag = oldDrag;
C_SP2D = null;
connectedBody = null;
SetLineRendererPositions(Vector3.zero, Vector3.zero);
}
}
}
