Method addSphere

cpp/5_Domain_Specific/smokeParticles/ParticleSystem.cpp:236–265

add sphere on regular grid

// add sphere on regular grid
void ParticleSystem::addSphere(uint &index, vec3f pos, vec3f vel, int r, float spacing, float jitter, float lifetime)
{
    float4 *posPtr = m_pos.getHostPtr();
    float4 *velPtr = m_vel.getHostPtr();

    uint start = index;
    uint count = 0;

    for (int z = -r; z <= r; z++) {
        for (int y = -r; y <= r; y++) {
            for (int x = -r; x <= r; x++) {
                vec3f delta = vec3f((float)x, (float)y, (float)z) * spacing;
                float dist  = length(delta);

                if ((dist <= spacing * r) && (index < m_numParticles)) {
                    // vec3f p = pos + delta + svrand()*jitter;

                    posPtr[index] = make_float4(pos.x, pos.y, pos.z, 0.0f);
                    velPtr[index] = make_float4(vel.x, vel.y, vel.z, lifetime);

                    index++;
                    count++;
                }
            }
        }
    }

    m_pos.copy(GpuArray<float4>::HOST_TO_DEVICE, start, count);
    m_vel.copy(GpuArray<float4>::HOST_TO_DEVICE, start, count);
}

void ParticleSystem::reset(ParticleConfig config)
{