一.粒子实现方式

      创建2D平面模型作为粒子基本单元,系统预制平面在particle_meshes.brf文件中,通过particle_blend着色器实现粒子透明度和着色效果.

#雨点粒子平面
prtcl_rain
#雪粒子平面
prtcl_snow
#烟尘粒子平面(马匹奔跑时产生)
prtcl_dust_a
prtcl_dust_b
#火焰粒子平面
prtcl_fire

二.粒子系统配置

      创建通过module_particle_system.py配置粒子系统.可控制粒子的数量,强度,生命周期,使用粒子平面.

#粒子溅射类型
psf_always_emit         = 0x0000000002
psf_global_emit_dir     = 0x0000000010
psf_emit_at_water_level = 0x0000000020
psf_billboard_2d        = 0x0000000100 # up_vec = dir, front rotated towards camera
psf_billboard_3d        = 0x0000000200 # front_vec point to camera.
psf_billboard_drop      = 0x0000000300
psf_turn_to_velocity    = 0x0000000400
psf_randomize_rotation  = 0x0000001000
psf_randomize_size      = 0x0000002000
psf_2d_turbulance       = 0x0000010000
psf_next_effect_is_lod  = 0x0000020000


#血迹粒子系统配置
("game_blood_2", psf_billboard_3d | psf_randomize_size|psf_randomize_rotation ,  "prt_mesh_blood_3",
     2000, 0.6, 3, 0.3, 0, 0,        #num_particles, life, damping, gravity_strength, turbulance_size, turbulance_strength
     (0.0, 0.25), (0.7, 0.1),        #alpha keys
     (0.1, 0.7), (1, 0.7),      #red keys
     (0.1, 0.7), (1, 0.7),       #green keys
     (0.1, 0.7), (1, 0.7),      #blue keys
     (0.0, 0.15),   (1, 0.35),    #scale keys
     (0.01, 0.2, 0.01),             #emit box size
     (0.2, 0.3, 0),                 #emit velocity
     0.3,                         #emit dir randomness
     150,                       #rotation speed
     0,                       #rotation damping
     ),

引擎定制粒子系统:

#水溅射粒子系统
psys_game_water_splash_3
psys_game_water_splash_2
psys_game_water_splash_1

#马蹄烟雾
psys_game_hoof_dust_mud
psys_game_hoof_dust_snow 
psys_game_hoof_dust

#血迹粒子系统
psys_game_blood_2
psys_game_blood

#天气粒子系统
psys_game_snow
psys_game_rain

三.使用粒子系统

#scene_prop初始化时使用
particle_system_add_new                     = 1965  # (particle_system_add_new, <par_sys_id>,[position]),
                                                    # Adds a new particle system to an object. Uses position offset and color provided to previous calls to (set_position_delta) and (set_current_color). Can only be used in item/prop triggers.
particle_system_emit                        = 1968  # (particle_system_emit, <par_sys_id>, <value_num_particles>, <value_period>),
                                                    # Adds a particle system in some fancy way. Uses position offset and color provided to previous calls to (set_position_delta) and (set_current_color). Can only be used in item/prop triggers.

#在某个位置溅射粒子系统
particle_system_burst                       = 1969  # (particle_system_burst, <par_sys_id>, <position>, [percentage_burst_strength]),
                                                    # Bursts a particle system in specified position.
particle_system_burst_no_sync               = 1975  # (particle_system_burst_without_sync,<par_sys_id>,<position_no>,[percentage_burst_strength]),
                                                    # Version 1.153+. Same as above, but apparently does not synchronize this between server and client.
prop_instance_add_particle_system           = 1886  # (prop_instance_add_particle_system, <scene_prop_id>, <par_sys_id>, <position_no>),
                                                    # Version 1.153+. Adds a new particle system to the scene prop. Note that <position_no> is local, i.e. in relation to scene prop's coordinates and rotation.
prop_instance_stop_all_particle_systems     = 1887  # (prop_instance_stop_all_particle_systems, <scene_prop_id>),
                                                    # Version 1.153+. Removes all particle systems currently associated with scene prop instance.