handle_bounds()

void MayaFlux::Nodes::Network::ParticleNetwork::handle_bounds ( )

private

Handle boundary conditions.

Definition at line 435 of file ParticleNetwork.cpp.

{
    if (m_bounds_mode == BoundsMode::NONE) {
        return;
    }
 
    for (auto& particle : m_particles) {
        glm::vec3 pos = particle.point->get_position();
        bool out_of_bounds = false;
 
        for (int axis = 0; axis < 3; ++axis) {
            if (pos[axis] < m_bounds_min[axis] || pos[axis] > m_bounds_max[axis]) {
                out_of_bounds = true;
 
                switch (m_bounds_mode) {
                case BoundsMode::BOUNCE:
                    if (pos[axis] < m_bounds_min[axis]) {
                        pos[axis] = m_bounds_min[axis];
                        particle.velocity[axis] = -particle.velocity[axis] * 0.8F; // Energy loss
                    } else if (pos[axis] > m_bounds_max[axis]) {
                        pos[axis] = m_bounds_max[axis];
                        particle.velocity[axis] = -particle.velocity[axis] * 0.8F;
                    }
                    break;
 
                case BoundsMode::WRAP:
                    if (pos[axis] < m_bounds_min[axis]) {
                        pos[axis] = m_bounds_max[axis];
                    } else if (pos[axis] > m_bounds_max[axis]) {
                        pos[axis] = m_bounds_min[axis];
                    }
                    break;
 
                case BoundsMode::CLAMP:
                    pos[axis] = glm::clamp(pos[axis], m_bounds_min[axis], m_bounds_max[axis]);
                    particle.velocity[axis] = 0.0F;
                    break;
 
                case BoundsMode::DESTROY:
                    pos = random_position_volume();
                    particle.velocity = glm::vec3(0.0F);
                    break;
 
                case BoundsMode::NONE:
                    break;
                }
            }
        }
 
        if (out_of_bounds) {
            particle.point->set_position(pos);
        }
    }
}

References BOUNCE, CLAMP, DESTROY, m_bounds_max, m_bounds_min, m_bounds_mode, m_particles, NONE, random_position_volume(), and WRAP.

Referenced by process_batch().

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