void ParticleSystemProxy::generateParticlesFromSphereEmitter(scene::IParticleSphereEmitter *emitter)
{
ParticleData *particles = new ParticleData[count], *initialvalue = new ParticleData[count];
for (unsigned i = 0; i < count; i++) {
// Random distance from center
const f32 distance = os::Randomizer::frand() * emitter->getRadius();
// Random direction from center
vector3df pos = emitter->getCenter() + distance;
pos.rotateXYBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
pos.rotateYZBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
pos.rotateXZBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
particles[i].PositionX = pos.X;
particles[i].PositionY = pos.Y;
particles[i].PositionZ = pos.Z;
// Initial lifetime is > 1
particles[i].Lifetime = 2.;
memcpy(&(initialvalue[i].PositionX), &(particles[i].PositionX), 3 * sizeof(float));
generateLifetimeSizeDirection(emitter, initialvalue[i].Lifetime, initialvalue[i].Size,
initialvalue[i].DirectionX, initialvalue[i].DirectionY, initialvalue[i].DirectionZ);
memcpy(&(particles[i].DirectionX), &(initialvalue[i].DirectionX), 4 * sizeof(float));
}
glBindBuffer(GL_ARRAY_BUFFER, initial_values_buffer);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), initialvalue, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[0]);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), particles, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[1]);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), 0, GL_STREAM_DRAW);
delete[] particles;
delete[] initialvalue;
}
void ParticleSystemProxy::generateParticlesFromBoxEmitter(scene::IParticleBoxEmitter *emitter)
{
ParticleData *particles = new ParticleData[count], *initialvalue = new ParticleData[count];
const core::vector3df& extent = emitter->getBox().getExtent();
for (unsigned i = 0; i < count; i++) {
particles[i].PositionX = emitter->getBox().MinEdge.X + os::Randomizer::frand() * extent.X;
particles[i].PositionY = emitter->getBox().MinEdge.Y + os::Randomizer::frand() * extent.Y;
particles[i].PositionZ = emitter->getBox().MinEdge.Z + os::Randomizer::frand() * extent.Z;
// Initial lifetime is random
particles[i].Lifetime = os::Randomizer::frand();
memcpy(&(initialvalue[i].PositionX), &(particles[i].PositionX), 3 * sizeof(float));
generateLifetimeSizeDirection(emitter, initialvalue[i].Lifetime, initialvalue[i].Size,
initialvalue[i].DirectionX, initialvalue[i].DirectionY, initialvalue[i].DirectionZ);
memcpy(&(particles[i].DirectionX), &(initialvalue[i].DirectionZ), 4 * sizeof(float));
}
glBindBuffer(GL_ARRAY_BUFFER, initial_values_buffer);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), initialvalue, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[0]);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), particles, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[1]);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), 0, GL_STREAM_DRAW);
delete[] particles;
delete[] initialvalue;
}
void ParticleSystemProxy::generateParticlesFromPointEmitter(scene::IParticlePointEmitter *emitter)
{
ParticleData *particles = new ParticleData[count], *initialvalue = new ParticleData[count];
for (unsigned i = 0; i < count; i++) {
particles[i].PositionX = 0;
particles[i].PositionY = 0;
particles[i].PositionZ = 0;
// Initial lifetime is >1
particles[i].Lifetime = 2.;
memcpy(&(initialvalue[i].PositionX), &(particles[i].PositionX), 3 * sizeof(float));
generateLifetimeSizeDirection(emitter, initialvalue[i].Lifetime, initialvalue[i].Size,
initialvalue[i].DirectionX, initialvalue[i].DirectionY, initialvalue[i].DirectionZ);
memcpy(&(particles[i].DirectionX), &(initialvalue[i].DirectionX), 4 * sizeof(float));
}
glBindBuffer(GL_ARRAY_BUFFER, initial_values_buffer);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), initialvalue, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[0]);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), particles, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_buffers[1]);
glBufferData(GL_ARRAY_BUFFER, count * sizeof(ParticleData), 0, GL_STREAM_DRAW);
delete[] particles;
delete[] initialvalue;
}
// ----------------------------------------------------------------------------
void STKParticle::generateParticlesFromSphereEmitter
(scene::IParticleSphereEmitter *emitter)
{
m_particles_generating.clear();
m_initial_particles.clear();
m_particles_generating.resize(m_max_count);
m_initial_particles.resize(m_max_count);
for (unsigned i = 0; i < m_max_count; i++)
{
// Random distance from center
const f32 distance = os::Randomizer::frand() * emitter->getRadius();
// Random direction from center
vector3df pos = emitter->getCenter() + distance;
pos.rotateXYBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
pos.rotateYZBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
pos.rotateXZBy(os::Randomizer::frand() * 360.f, emitter->getCenter());
m_particles_generating[i].m_position = pos;
// Initial lifetime is > 1
m_particles_generating[i].m_lifetime = 2.0f;
m_initial_particles[i].m_position =
m_particles_generating[i].m_position;
generateLifetimeSizeDirection(emitter,
m_initial_particles[i].m_lifetime,
m_particles_generating[i].m_size,
m_particles_generating[i].m_direction);
m_initial_particles[i].m_direction =
m_particles_generating[i].m_direction;
m_initial_particles[i].m_size = m_particles_generating[i].m_size;
}
} // generateParticlesFromSphereEmitter
// ----------------------------------------------------------------------------
void STKParticle::generateParticlesFromBoxEmitter
(scene::IParticleBoxEmitter *emitter)
{
m_particles_generating.clear();
m_initial_particles.clear();
m_particles_generating.resize(m_max_count);
m_initial_particles.resize(m_max_count);
const core::vector3df& extent = emitter->getBox().getExtent();
for (unsigned i = 0; i < m_max_count; i++)
{
m_particles_generating[i].m_position.X =
emitter->getBox().MinEdge.X + os::Randomizer::frand() * extent.X;
m_particles_generating[i].m_position.Y =
emitter->getBox().MinEdge.Y + os::Randomizer::frand() * extent.Y;
m_particles_generating[i].m_position.Z =
emitter->getBox().MinEdge.Z + os::Randomizer::frand() * extent.Z;
// Initial lifetime is random
m_particles_generating[i].m_lifetime = os::Randomizer::frand();
if (!m_randomize_initial_y)
{
m_particles_generating[i].m_lifetime += 1.0f;
}
m_initial_particles[i].m_position =
m_particles_generating[i].m_position;
generateLifetimeSizeDirection(emitter,
m_initial_particles[i].m_lifetime,
m_particles_generating[i].m_size,
m_particles_generating[i].m_direction);
m_initial_particles[i].m_direction =
m_particles_generating[i].m_direction;
m_initial_particles[i].m_size = m_particles_generating[i].m_size;
if (m_randomize_initial_y)
{
m_initial_particles[i].m_position.Y =
os::Randomizer::frand() * 50.0f; // -100.0f;
}
}
} // generateParticlesFromBoxEmitter
// ----------------------------------------------------------------------------
void STKParticle::generateParticlesFromPointEmitter
(scene::IParticlePointEmitter *emitter)
{
m_particles_generating.clear();
m_initial_particles.clear();
m_particles_generating.resize(m_max_count);
m_initial_particles.resize(m_max_count);
for (unsigned i = 0; i < m_max_count; i++)
{
// Initial lifetime is > 1
m_particles_generating[i].m_lifetime = 2.0f;
generateLifetimeSizeDirection(emitter,
m_initial_particles[i].m_lifetime,
m_particles_generating[i].m_size,
m_particles_generating[i].m_direction);
m_initial_particles[i].m_direction =
m_particles_generating[i].m_direction;
m_initial_particles[i].m_size = m_particles_generating[i].m_size;
}
} // generateParticlesFromPointEmitter