void Emitter::update(F32 delta_time){
if (!game_object->active) return;
lambda_spawn(this);
m_elapsed_time += delta_time;
for (auto& p : m_particles){
if (p.active){
lambda_particle_update(this,&p, delta_time);
p.lifetime += p.decay_rate * delta_time;
if (p.lifetime >= 1.0f){
remove_particle(&p);
}
}
}
}
int delete_particle_of_type(int type) {
int *p_id, *index_id;
p_id=(int *) malloc (sizeof(int));
index_id=(int *) malloc (sizeof(int));
if (find_particle_type_id(type, p_id, index_id) == ES_ERROR )
return ES_ERROR;
int in_type = Index.type[type];
// maximal possible index id
int max = type_array[in_type].max_entry - 1;
if ( max < 0 )
return ES_ERROR;
if ( remove_particle(*p_id) == ES_ERROR ) {
// takes also care of removing the index from the array
return ES_ERROR;
}
return ES_OK;
}
void Emitter::disable(){
for (auto& p : m_particles){
if (p.active) remove_particle(&p);
}
}
int main(void) {
t_gravity_particles gravity_particles;
t_particle_system* particle_system;
t_particle* p;
int i;
show_msgbox(
"Ndless - Particle System Demo",
"------------------------\n"
" Particle System Demo\n" \
"© 2010-2011 by the Ndless Team\n"
"------------------------\n"
"+ Add a particle\n"
"- Remove a particle\n"
"* Increase gravity\n"
"/ Decrease gravity\n"
"C Enable/Disable collision detection\n"
"T Enable/Disable trace mode\n"
"S Clear screen\n"
"ESC - Exit"
);
if (is_classic) { // programs are started with the screen cleared on non-classic
void *scrbuf = malloc(SCREEN_BYTES_SIZE);
memcpy(scrbuf, SCREEN_BASE_ADDRESS, SCREEN_BYTES_SIZE);
for (i = 0; i < 0x0F; ++i) {
fade(scrbuf, 1);
sleep(70);
if (isKeyPressed(KEY_NSPIRE_ESC)) {
free(scrbuf);
return 0;
}
}
free(scrbuf);
}
clrscr();
lcd_ingray();
gravity_particles_construct(&gravity_particles, 0.00006672f, 100);
particle_system = &(gravity_particles.particleSystem);
particle_system->detectCol = false;
particle_system->trace = false;
particle_system_start(particle_system);
p = particle_construct3(&(t_vector){0.f, 0.f, 0.f}, &(t_vector){0.f, 0.f, 0.f}, 1500.f, 4, BLACK);
(void) particle_system_addParticle(particle_system, p);
add_particle(&gravity_particles);
while (!isKeyPressed(KEY_NSPIRE_ESC)) {
gravity_particles_draw(&gravity_particles);
// Add a particule (+)
if (isKeyPressed(KEY_NSPIRE_PLUS)) {
if (particle_system->nParticles == 0) {
p = particle_construct3(&(t_vector){0.f, 0.f, 0.f}, &(t_vector){0.f, 0.f, 0.f}, 1500.f, 4, BLACK);
(void) particle_system_addParticle(particle_system, p);
}
add_particle(&gravity_particles);
while (isKeyPressed(KEY_NSPIRE_PLUS));
}
// Remove a particle (-)
if (isKeyPressed(KEY_NSPIRE_MINUS)) {
remove_particle(&gravity_particles);
while (isKeyPressed(KEY_NSPIRE_MINUS));
}
// High gravity (*)
if (isKeyPressed(KEY_NSPIRE_MULTIPLY)) {
gravity_particles.gravitationalConstant *= 10.f;
while (isKeyPressed(KEY_NSPIRE_MULTIPLY));
}
// Low gravity (/)
if (isKeyPressed(KEY_NSPIRE_DIVIDE)) {
gravity_particles.gravitationalConstant /= 10.f;
while (isKeyPressed(KEY_NSPIRE_DIVIDE));
}
// Collision (C)
if (isKeyPressed(KEY_NSPIRE_C)) {
particle_system->detectCol = !particle_system->detectCol;
while (isKeyPressed(KEY_NSPIRE_C));
}
// Collision (T)
if (isKeyPressed(KEY_NSPIRE_T)) {
particle_system->trace = !particle_system->trace;
while (isKeyPressed(KEY_NSPIRE_T));
}
// Collision (S)
if (isKeyPressed(KEY_NSPIRE_S)) {
clearScreen();
while (isKeyPressed(KEY_NSPIRE_S));
}
}
gravity_particles_destruct(&gravity_particles);
return 0;
}
