diff options
Diffstat (limited to 'scene/2d/cpu_particles_2d.cpp')
| -rw-r--r-- | scene/2d/cpu_particles_2d.cpp | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/scene/2d/cpu_particles_2d.cpp b/scene/2d/cpu_particles_2d.cpp index ff27e0a29a..2b1009a2d1 100644 --- a/scene/2d/cpu_particles_2d.cpp +++ b/scene/2d/cpu_particles_2d.cpp @@ -545,6 +545,8 @@ void CPUParticles2D::_particles_process(float p_delta) { velocity_xform[2] = Vector2(); } + float system_phase = time / lifetime; + for (int i = 0; i < pcount; i++) { Particle &p = parray[i]; @@ -552,21 +554,26 @@ void CPUParticles2D::_particles_process(float p_delta) { if (!emitting && !p.active) continue; - float restart_time = (float(i) / float(pcount)) * lifetime; float local_delta = p_delta; + // The phase is a ratio between 0 (birth) and 1 (end of life) for each particle. + // While we use time in tests later on, for randomness we use the phase as done in the + // original shader code, and we later multiply by lifetime to get the time. + float restart_phase = float(i) / float(pcount); + if (randomness_ratio > 0.0) { uint32_t seed = cycle; - if (restart_time >= time) { + if (restart_phase >= system_phase) { seed -= uint32_t(1); } seed *= uint32_t(pcount); seed += uint32_t(i); float random = float(idhash(seed) % uint32_t(65536)) / 65536.0; - restart_time += randomness_ratio * random * 1.0 / float(pcount); + restart_phase += randomness_ratio * random * 1.0 / float(pcount); } - restart_time *= (1.0 - explosiveness_ratio); + restart_phase *= (1.0 - explosiveness_ratio); + float restart_time = restart_phase * lifetime; bool restart = false; if (time > prev_time) { @@ -748,7 +755,7 @@ void CPUParticles2D::_particles_process(float p_delta) { force += diff.length() > 0.0 ? diff.normalized() * (parameters[PARAM_RADIAL_ACCEL] + tex_radial_accel) * Math::lerp(1.0f, rand_from_seed(alt_seed), randomness[PARAM_RADIAL_ACCEL]) : Vector2(); //apply tangential acceleration; Vector2 yx = Vector2(diff.y, diff.x); - force += yx.length() > 0.0 ? (yx * Vector2(-1.0, 1.0)) * ((parameters[PARAM_TANGENTIAL_ACCEL] + tex_tangential_accel) * Math::lerp(1.0f, rand_from_seed(alt_seed), randomness[PARAM_TANGENTIAL_ACCEL])) : Vector2(); + force += yx.length() > 0.0 ? (yx * Vector2(-1.0, 1.0)).normalized() * ((parameters[PARAM_TANGENTIAL_ACCEL] + tex_tangential_accel) * Math::lerp(1.0f, rand_from_seed(alt_seed), randomness[PARAM_TANGENTIAL_ACCEL])) : Vector2(); //apply attractor forces p.velocity += force * local_delta; //orbit velocity @@ -1174,15 +1181,16 @@ void CPUParticles2D::_bind_methods() { ADD_PROPERTY(PropertyInfo(Variant::BOOL, "emitting"), "set_emitting", "is_emitting"); ADD_PROPERTY(PropertyInfo(Variant::INT, "amount", PROPERTY_HINT_EXP_RANGE, "1,1000000,1"), "set_amount", "get_amount"); ADD_GROUP("Time", ""); - ADD_PROPERTY(PropertyInfo(Variant::REAL, "lifetime", PROPERTY_HINT_EXP_RANGE, "0.01,600.0,0.01,or_greater"), "set_lifetime", "get_lifetime"); + ADD_PROPERTY(PropertyInfo(Variant::REAL, "lifetime", PROPERTY_HINT_RANGE, "0.01,600.0,0.01,or_greater"), "set_lifetime", "get_lifetime"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "one_shot"), "set_one_shot", "get_one_shot"); - ADD_PROPERTY(PropertyInfo(Variant::REAL, "preprocess", PROPERTY_HINT_EXP_RANGE, "0.00,600.0,0.01"), "set_pre_process_time", "get_pre_process_time"); + ADD_PROPERTY(PropertyInfo(Variant::REAL, "preprocess", PROPERTY_HINT_RANGE, "0.00,600.0,0.01"), "set_pre_process_time", "get_pre_process_time"); ADD_PROPERTY(PropertyInfo(Variant::REAL, "speed_scale", PROPERTY_HINT_RANGE, "0,64,0.01"), "set_speed_scale", "get_speed_scale"); ADD_PROPERTY(PropertyInfo(Variant::REAL, "explosiveness", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_explosiveness_ratio", "get_explosiveness_ratio"); ADD_PROPERTY(PropertyInfo(Variant::REAL, "randomness", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_randomness_ratio", "get_randomness_ratio"); ADD_PROPERTY(PropertyInfo(Variant::INT, "fixed_fps", PROPERTY_HINT_RANGE, "0,1000,1"), "set_fixed_fps", "get_fixed_fps"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "fract_delta"), "set_fractional_delta", "get_fractional_delta"); ADD_GROUP("Drawing", ""); + // No visibility_rect property contrarily to Particles2D, it's updated automatically. ADD_PROPERTY(PropertyInfo(Variant::BOOL, "local_coords"), "set_use_local_coordinates", "get_use_local_coordinates"); ADD_PROPERTY(PropertyInfo(Variant::INT, "draw_order", PROPERTY_HINT_ENUM, "Index,Lifetime"), "set_draw_order", "get_draw_order"); ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "texture", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), "set_texture", "get_texture"); |