void OnRenderObject()
{
if (m_Renderer && m_LocalMatrix != transform.localToWorldMatrix)
{
m_LocalMatrix = transform.localToWorldMatrix;
LiquidSimulator.DrawObject(m_Renderer);
}
}
void Awake()
{
// Camera view
View = GameObject.Find("View").gameObject;
// Load some sprites to show the liquid flow directions
LiquidFlowSprites = Resources.LoadAll <Sprite>("LiquidFlowSprites");
// Generate our viewable grid GameObjects
CreateGrid();
// Initialize the liquid simulator
LiquidSimulator = new LiquidSimulator();
LiquidSimulator.Initialize(Cells);
}
void Update()
{
if (Input.GetMouseButton(0))
{
Ray ray = m_Camera.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (!m_IsBeginDrag)
{
if (Physics.Raycast(ray, out hit))
{
if (hit.collider.gameObject == dragTarget)
{
if (!m_IsBeginDrag)
{
m_IsBeginDrag = true;
Vector3 viewPos =
m_Camera.transform.worldToLocalMatrix.MultiplyPoint(hit.collider.transform.position);
m_DragPlane = viewPos.z;
m_Offset = hit.point - hit.collider.transform.position;
m_DragWorldPlane = new Vector4(0, 1, 0, Vector3.Dot(Vector3.up, hit.point));
}
}
else if (hit.collider.gameObject == simulator.gameObject)
{
if (!m_IsBeginDrag)
{
float t = (m_SwipePlane.w -
Vector3.Dot(ray.origin,
new Vector3(m_SwipePlane.x, m_SwipePlane.y, m_SwipePlane.z))) /
Vector3.Dot(ray.direction,
new Vector3(m_SwipePlane.x, m_SwipePlane.y, m_SwipePlane.z));
Vector3 hitpos = ray.origin + ray.direction * t;
Matrix4x4 matrix = Matrix4x4.TRS(hitpos, Quaternion.identity, Vector3.one * swipeSize);
LiquidSimulator.DrawMesh(swipeMesh, matrix);
}
}
}
}
else
{
if (m_Camera.transform.eulerAngles.x > 45)
{
float t = (m_DragWorldPlane.w -
Vector3.Dot(ray.origin,
new Vector3(m_DragWorldPlane.x, m_DragWorldPlane.y, m_DragWorldPlane.z))) /
Vector3.Dot(ray.direction,
new Vector3(m_DragWorldPlane.x, m_DragWorldPlane.y, m_DragWorldPlane.z));
Vector3 hitpos = ray.origin + ray.direction * t;
dragTarget.transform.position = hitpos - m_Offset;
}
else
{
float tan = Mathf.Tan(m_Camera.fieldOfView * 0.5f * Mathf.Deg2Rad);
float height = m_DragPlane * tan;
float width = height * m_Camera.aspect;
float x = (Input.mousePosition.x / Screen.width) * 2 - 1;
float y = (Input.mousePosition.y / Screen.height) * 2 - 1;
Vector3 viewPos = new Vector3(x * width, y * height, m_DragPlane);
Vector3 pos = m_Camera.transform.localToWorldMatrix.MultiplyPoint(viewPos);
dragTarget.transform.position = pos - m_Offset;
}
}
}
if (Input.GetMouseButtonUp(0))
{
m_IsBeginDrag = false;
}
}
