void ApplyImpulses(FlexContainer.ParticleData _particleData)
{
if (m_currentAsset && m_instanceHandle)
{
FlexExt.Instance instance = m_instanceHandle.instance;
int[] indices = new int[instance.numParticles];
FlexUtils.FastCopy(instance.particleIndices, indices);
foreach (var info in m_impulses)
{
if (info.impulse.sqrMagnitude < float.Epsilon)
{
continue;
}
float mass = 0;
foreach (var index in indices)
{
if (info.particle == -1 || info.particle == index)
{
Vector4 particle = _particleData.GetParticle(index);
mass += 1.0f / particle.w;
}
}
if (mass < float.Epsilon)
{
continue;
}
Vector3 velocityChange = info.impulse / mass;
foreach (var index in indices)
{
_particleData.SetVelocity(index, _particleData.GetVelocity(index) + velocityChange);
}
}
}
}
void TeleportParticles(FlexContainer.ParticleData _particleData)
{
Matrix4x4 offset = Matrix4x4.TRS(m_teleportPosition, Quaternion.identity, Vector3.one)
* Matrix4x4.TRS(Vector3.zero, m_teleportRotation, Vector3.one)
* Matrix4x4.TRS(Vector3.zero, Quaternion.Inverse(transform.rotation), Vector3.one)
* Matrix4x4.TRS(-transform.position, Quaternion.identity, Vector3.one);
if (m_currentAsset && m_instanceHandle)
{
FlexExt.Instance instance = m_instanceHandle.instance;
int[] indices = new int[instance.numParticles];
FlexUtils.FastCopy(instance.particleIndices, indices);
foreach (var index in indices)
{
Vector4 particle = _particleData.GetParticle(index);
float storeW = particle.w;
particle = offset.MultiplyPoint3x4(particle);
particle.w = storeW;
_particleData.SetParticle(index, particle);
_particleData.SetVelocity(index, Vector3.zero);
}
}
transform.position = m_teleportPosition;
transform.rotation = m_teleportRotation;
transform.hasChanged = false;
}
//This function is to set the initial velocity of the fluid
bool PresetVelocities(FlexContainer.ParticleData _particleData)
{
Vector3 initVelocity = new Vector3(0, 0, -2.0f); //Change the Vector to adjust the intial velocity
FlexExt.Instance instance = m_instanceHandle.instance;
int[] indices = new int[instance.numParticles];
FlexUtils.FastCopy(instance.particleIndices, indices);
foreach (var index in indices)
{
_particleData.SetVelocity(index, initVelocity);
}
return(true);
}
void UpdateParticles(FlexContainer.ParticleData _particleData)
{
if (handle && m_indices != null && m_indices.Length > 0)
{
float dT = Application.isPlaying ? Time.fixedDeltaTime : 0;
int newCount = FlexUtils.UpdateSourceParticles(ref m_indices[0], ref m_ages[0], m_count, _particleData.particleData.particles, dT, massScale);
if (newCount != m_count)
{
m_currentContainer.FreeParticles(m_indices, newCount, m_count - newCount);
m_count = newCount;
}
if (m_isActive && m_startSpeed > 0)
{
m_spawnTime += dT;
while (m_spawnTime > 0)
{
int spawnCount = Mathf.Min(m_asset.nozzleCount, m_asset.maxParticles - m_count);
if (spawnCount > 0)
{
newCount += m_currentContainer.AllocParticles(m_indices, m_count, spawnCount);
for (int i = m_count; i < newCount; ++i)
{
int index = m_indices[i];
int nozzle = i - m_count;
_particleData.SetPhase(index, m_phase);
Vector3 direction = transform.TransformDirection(m_asset.nozzleDirections[nozzle]);
Vector3 velocity = direction * m_startSpeed;
_particleData.SetVelocity(index, velocity);
Vector3 position = transform.TransformPoint(m_asset.nozzlePositions[nozzle]);
position -= velocity * (2.0f * dT - m_spawnTime);
Vector4 particle = position; particle.w = 0.000001f;//1.0f / massScale;//
_particleData.SetParticle(index, particle);
_particleData.SetRestParticle(index, Vector3.zero);
m_ages[i] = m_lifeTime;
}
m_count = newCount;
}
float dist = /*fluid ? m_currentContainer.fluidRest :*/ m_currentContainer.solidRest;
m_spawnTime -= dist / m_startSpeed;
}
}
SetIndices(m_indices, m_count);
}
}