void ApplyForce(Vector2 position, Vector2 direction)
{
m_CommandBuffer.SetGlobalVector(Properties.Force, new Vector4(position.x, position.y, direction.x, direction.y));
m_CommandBuffer.SetGlobalTexture(Properties.Buffer, m_VelocityBuffer.active);
m_VelocityBuffer.Swap();
Blit(m_VelocityBuffer.active, SolverPass.ApplyForce);
}
private void ApplyImpulse(float dt)
{
m_applyImpulse.SetVector("_Size", m_size);
m_applyImpulse.SetFloat("_Radius", m_inputRadius);
m_applyImpulse.SetFloat("_DensityAmount", m_densityAmount);
m_applyImpulse.SetFloat("_TemperatureAmount", m_temperatureAmount);
m_applyImpulse.SetFloat("_DeltaTime", dt);
m_applyImpulse.SetVector("_Pos", m_inputPos);
m_applyImpulse.SetTexture(0, "_Read", m_atmosphere.Active);
m_applyImpulse.SetTexture(0, "_Write", m_atmosphere.Inactive);
m_applyImpulse.Dispatch(0, (int)m_size.x / (int)KernelThreadSize_X, (int)m_size.y / (int)KernelThreadSize_Y, (int)m_size.z / (int)KernelThreadSize_Z);
m_atmosphere.Swap();
}
private void ApplyBuoyancy(float dt)
{
m_applyBuoyancy.SetVector("_Size", m_size);
m_applyBuoyancy.SetVector("_Up", new Vector4(0, 1, 0, 0));
m_applyBuoyancy.SetFloat("_Buoyancy", m_densityBuoyancy);
m_applyBuoyancy.SetFloat("_AmbientTemperature", m_ambientTemperature);
m_applyBuoyancy.SetFloat("_Weight", m_densityWeight);
m_applyBuoyancy.SetFloat("_DeltaTime", dt);
m_applyBuoyancy.SetTexture(0, "_Write", m_velocity.Inactive);
m_applyBuoyancy.SetTexture(0, "_Velocity", m_velocity.Active);
m_applyBuoyancy.SetTexture(0, "_Atmosphere", m_atmosphere.Active);
m_applyBuoyancy.Dispatch(0, (int)m_size.x / (int)KernelThreadSize_X, (int)m_size.y / (int)KernelThreadSize_Y, (int)m_size.z / (int)KernelThreadSize_Z);
m_velocity.Swap();
}
void Pressure()
{
m_CommandBuffer.SetGlobalFloat(Properties.PoissonAlphaCoefficient, -m_GridScale * m_GridScale * viscosity);
m_CommandBuffer.SetGlobalTexture(Properties.Buffer2, m_DivergenceBuffer.active);
m_CommandBuffer.SetGlobalTexture(Properties.Buffer, m_PressureBuffer.active);
m_PressureBuffer.Swap();
for (int i = 0; i < iterations; i++)
{
Blit(m_PressureBuffer.active, SolverPass.Pressure);
}
}
private void ComputePressure()
{
m_computeJacobi.SetVector("_Size", m_size);
m_computeJacobi.SetTexture(0, "_Divergence", m_divergence.Active);
m_computeJacobi.SetTexture(0, "_Obstacles", m_obstacles.Active);
for (int i = 0; i < m_iterations; i++)
{
m_computeJacobi.SetTexture(0, "_Write", m_pressure.Inactive);
m_computeJacobi.SetTexture(0, "_Pressure", m_pressure.Active);
m_computeJacobi.Dispatch(0, (int)m_size.x / (int)KernelThreadSize_X, (int)m_size.y / (int)KernelThreadSize_Y, (int)m_size.z / (int)KernelThreadSize_Z);
m_pressure.Swap();
}
}