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Implement stream-type particle emitter

scene_man
En Yi 2023-11-18 19:44:20 +08:00
parent cb0a93ee70
commit be75263c2c
4 changed files with 31 additions and 9 deletions
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2
engine/engine_conf.h
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@ -12,7 +12,7 @@
#define MAX_EMITTER_CONF 8
//#define MAX_PARTICLE_EMITTER 8
#define MAX_ACTIVE_PARTICLE_EMITTER 32
#define MAX_PARTICLES 10
#define MAX_PARTICLES 32
#define MAX_TILE_TYPES 16

32
engine/particle_sys.c
View File

@ -43,6 +43,7 @@ static inline void spawn_particle(ParticleEmitter_t* emitter, uint32_t idx)
emitter->particles[idx].rotation = angle;
emitter->particles[idx].angular_vel = -10 + 20 * (float)rand() / (float)RAND_MAX;
emitter->particles[idx].size = 10 + 20 * (float)rand() / (float)RAND_MAX;
emitter->particles[idx].spawned = true;
;
}
@ -82,6 +83,14 @@ void play_emitter_handle(ParticleSystem_t* system, uint16_t handle)
{
// TODO: deal with stream type
//spawn_particle(emitter, 0);
uint32_t incr = 0;
for (uint32_t i = 0; i < emitter->n_particles; ++i)
{
emitter->particles[i].timer = incr;
emitter->particles[i].alive = false;
emitter->particles[i].spawned = false;
incr += emitter->config->initial_spawn_delay;
}
}
system->emitter_list[system->tail_idx].next = handle;
system->tail_idx = handle;
@ -97,7 +106,7 @@ void play_emitter_handle(ParticleSystem_t* system, uint16_t handle)
void pause_emitter_handle(ParticleSystem_t* system, uint16_t handle)
{
if (handle == 0) return;
if (!system->emitter_list[handle].playing) return;
//if (!system->emitter_list[handle].playing) return;
system->emitters[handle].active = false;
}
@ -146,21 +155,32 @@ void update_particle_system(ParticleSystem_t* system)
emitter->update_func(emitter->particles + i, emitter->user_data);
}
// Lifetime update
if (emitter->particles[i].timer > 0) emitter->particles[i].timer--;
if (emitter->particles[i].timer == 0)
}
// Lifetime update
if (emitter->particles[i].timer > 0) emitter->particles[i].timer--;
if (emitter->particles[i].timer == 0)
{
if (emitter->particles[i].spawned)
{
emitter->particles[i].alive = false;
}
else
{
emitter->particles[i].spawned = true;
}
}
if (!emitter->particles[i].alive)
{
if (emitter->config->one_shot || !emitter->active)
if (!emitter->active)
{
inactive_count++;
}
else
else if (emitter->config->one_shot)
{
inactive_count++;
}
else if (emitter->particles[i].spawned)
{
// If not one shot, immediately revive the particle
spawn_particle(emitter, i);

1
engine/particle_sys.h
View File

@ -36,6 +36,7 @@ typedef struct EmitterConfig
float launch_range[2];
float speed_range[2];
uint32_t particle_lifetime[2];
uint32_t initial_spawn_delay;
PartEmitterType_t type;
bool one_shot;
}EmitterConfig_t;

5
particle_test.c
View File

@ -81,10 +81,11 @@ int main(void)
EmitterConfig_t conf2 ={
.one_shot = false,
.launch_range = {0, 360},
.launch_range = {45, 135},
.speed_range = {300, 800},
.particle_lifetime = {15, 30},
.type = EMITTER_BURST,
.initial_spawn_delay = 5,
.type = EMITTER_STREAM,
};
ParticleEmitter_t emitter2 = {