Vector2 getFluidVelocity(Vector3 position)
{
Ray ray = Camera.main.ScreenPointToRay(position);
RaycastHit hitInfo = new RaycastHit();
if (fluid.GetComponent <Collider>().Raycast(ray, out hitInfo, 10))
{
Vector2 simSize = new Vector2(fluid.GetWidth(), fluid.GetHeight());
Vector2 posInSimSpace = new Vector2(hitInfo.textureCoord.x * simSize.x, hitInfo.textureCoord.y * simSize.y);
Vector2 velInSimSpace = fluid.GetVelocity((int)posInSimSpace.x, (int)posInSimSpace.y) * Time.deltaTime;
return(velInSimSpace);
}
return(Vector2.zero);
}
void LateUpdate()
{
if (m_fluid)
{
Ray ray = new Ray(gameObject.transform.position, new Vector3(0, 0, 1));
RaycastHit hitInfo = new RaycastHit();
if (m_fluid.GetComponent <Collider>().Raycast(ray, out hitInfo, 10))
{
Vector2 simSize = new Vector2(m_fluid.GetWidth(), m_fluid.GetHeight());
Vector2 posInSimSpace = new Vector2(hitInfo.textureCoord.x * simSize.x, hitInfo.textureCoord.y * simSize.y);
Vector2 velInSimSpace = m_fluid.GetVelocity((int)posInSimSpace.x, (int)posInSimSpace.y) * Time.deltaTime;
Vector2 worldSize = m_particleArea.GetRenderSize();
Vector2 velInWorldSpace = new Vector2((velInSimSpace.x * worldSize.x) / simSize.x, (velInSimSpace.y * worldSize.y) / simSize.y);
gameObject.transform.position = gameObject.transform.position + new Vector3(velInWorldSpace.x, velInWorldSpace.y, 0f);
}
}
}
private void LinkToFluidSimulation()
{
float fResolutionRatio = m_simulation.Resolution / (float)m_nResolution;
m_simulation.SetSize((int)(m_nWidth * fResolutionRatio), (int)(m_nHeight * fResolutionRatio));
m_simulation.InitShaders();
m_advectParticles.SetInts("_VelocitySize", new int[] { m_simulation.GetWidth(), m_simulation.GetHeight() });
}