class_gpuparticles2d.rst 27 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628
  1. :github_url: hide
  2. .. DO NOT EDIT THIS FILE!!!
  3. .. Generated automatically from Godot engine sources.
  4. .. Generator: https://github.com/godotengine/godot/tree/4.1/doc/tools/make_rst.py.
  5. .. XML source: https://github.com/godotengine/godot/tree/4.1/doc/classes/GPUParticles2D.xml.
  6. .. _class_GPUParticles2D:
  7. GPUParticles2D
  8. ==============
  9. **Inherits:** :ref:`Node2D<class_Node2D>` **<** :ref:`CanvasItem<class_CanvasItem>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`
  10. 2D particle emitter.
  11. .. rst-class:: classref-introduction-group
  12. Description
  13. -----------
  14. 2D particle node used to create a variety of particle systems and effects. **GPUParticles2D** features an emitter that generates some number of particles at a given rate.
  15. Use the :ref:`process_material<class_GPUParticles2D_property_process_material>` property to add a :ref:`ParticleProcessMaterial<class_ParticleProcessMaterial>` to configure particle appearance and behavior. Alternatively, you can add a :ref:`ShaderMaterial<class_ShaderMaterial>` which will be applied to all particles.
  16. 2D particles can optionally collide with :ref:`LightOccluder2D<class_LightOccluder2D>` nodes (note: they don't collide with :ref:`PhysicsBody2D<class_PhysicsBody2D>` nodes).
  17. .. rst-class:: classref-introduction-group
  18. Tutorials
  19. ---------
  20. - :doc:`Particle systems (2D) <../tutorials/2d/particle_systems_2d>`
  21. - `2D Particles Demo <https://godotengine.org/asset-library/asset/118>`__
  22. - `2D Dodge The Creeps Demo (uses GPUParticles2D for the trail behind the player) <https://godotengine.org/asset-library/asset/515>`__
  23. .. rst-class:: classref-reftable-group
  24. Properties
  25. ----------
  26. .. table::
  27. :widths: auto
  28. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  29. | :ref:`int<class_int>` | :ref:`amount<class_GPUParticles2D_property_amount>` | ``8`` |
  30. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  31. | :ref:`float<class_float>` | :ref:`collision_base_size<class_GPUParticles2D_property_collision_base_size>` | ``1.0`` |
  32. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  33. | :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` | :ref:`draw_order<class_GPUParticles2D_property_draw_order>` | ``1`` |
  34. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  35. | :ref:`bool<class_bool>` | :ref:`emitting<class_GPUParticles2D_property_emitting>` | ``true`` |
  36. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  37. | :ref:`float<class_float>` | :ref:`explosiveness<class_GPUParticles2D_property_explosiveness>` | ``0.0`` |
  38. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  39. | :ref:`int<class_int>` | :ref:`fixed_fps<class_GPUParticles2D_property_fixed_fps>` | ``30`` |
  40. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  41. | :ref:`bool<class_bool>` | :ref:`fract_delta<class_GPUParticles2D_property_fract_delta>` | ``true`` |
  42. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  43. | :ref:`bool<class_bool>` | :ref:`interpolate<class_GPUParticles2D_property_interpolate>` | ``true`` |
  44. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  45. | :ref:`float<class_float>` | :ref:`lifetime<class_GPUParticles2D_property_lifetime>` | ``1.0`` |
  46. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  47. | :ref:`bool<class_bool>` | :ref:`local_coords<class_GPUParticles2D_property_local_coords>` | ``false`` |
  48. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  49. | :ref:`bool<class_bool>` | :ref:`one_shot<class_GPUParticles2D_property_one_shot>` | ``false`` |
  50. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  51. | :ref:`float<class_float>` | :ref:`preprocess<class_GPUParticles2D_property_preprocess>` | ``0.0`` |
  52. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  53. | :ref:`Material<class_Material>` | :ref:`process_material<class_GPUParticles2D_property_process_material>` | |
  54. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  55. | :ref:`float<class_float>` | :ref:`randomness<class_GPUParticles2D_property_randomness>` | ``0.0`` |
  56. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  57. | :ref:`float<class_float>` | :ref:`speed_scale<class_GPUParticles2D_property_speed_scale>` | ``1.0`` |
  58. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  59. | :ref:`NodePath<class_NodePath>` | :ref:`sub_emitter<class_GPUParticles2D_property_sub_emitter>` | ``NodePath("")`` |
  60. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  61. | :ref:`Texture2D<class_Texture2D>` | :ref:`texture<class_GPUParticles2D_property_texture>` | |
  62. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  63. | :ref:`bool<class_bool>` | :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>` | ``false`` |
  64. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  65. | :ref:`float<class_float>` | :ref:`trail_lifetime<class_GPUParticles2D_property_trail_lifetime>` | ``0.3`` |
  66. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  67. | :ref:`int<class_int>` | :ref:`trail_section_subdivisions<class_GPUParticles2D_property_trail_section_subdivisions>` | ``4`` |
  68. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  69. | :ref:`int<class_int>` | :ref:`trail_sections<class_GPUParticles2D_property_trail_sections>` | ``8`` |
  70. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  71. | :ref:`Rect2<class_Rect2>` | :ref:`visibility_rect<class_GPUParticles2D_property_visibility_rect>` | ``Rect2(-100, -100, 200, 200)`` |
  72. +-------------------------------------------------+---------------------------------------------------------------------------------------------+---------------------------------+
  73. .. rst-class:: classref-reftable-group
  74. Methods
  75. -------
  76. .. table::
  77. :widths: auto
  78. +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  79. | :ref:`Rect2<class_Rect2>` | :ref:`capture_rect<class_GPUParticles2D_method_capture_rect>` **(** **)** |const| |
  80. +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  81. | void | :ref:`emit_particle<class_GPUParticles2D_method_emit_particle>` **(** :ref:`Transform2D<class_Transform2D>` xform, :ref:`Vector2<class_Vector2>` velocity, :ref:`Color<class_Color>` color, :ref:`Color<class_Color>` custom, :ref:`int<class_int>` flags **)** |
  82. +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  83. | void | :ref:`restart<class_GPUParticles2D_method_restart>` **(** **)** |
  84. +---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  85. .. rst-class:: classref-section-separator
  86. ----
  87. .. rst-class:: classref-descriptions-group
  88. Enumerations
  89. ------------
  90. .. _enum_GPUParticles2D_DrawOrder:
  91. .. rst-class:: classref-enumeration
  92. enum **DrawOrder**:
  93. .. _class_GPUParticles2D_constant_DRAW_ORDER_INDEX:
  94. .. rst-class:: classref-enumeration-constant
  95. :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **DRAW_ORDER_INDEX** = ``0``
  96. Particles are drawn in the order emitted.
  97. .. _class_GPUParticles2D_constant_DRAW_ORDER_LIFETIME:
  98. .. rst-class:: classref-enumeration-constant
  99. :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **DRAW_ORDER_LIFETIME** = ``1``
  100. Particles are drawn in order of remaining lifetime. In other words, the particle with the highest lifetime is drawn at the front.
  101. .. _class_GPUParticles2D_constant_DRAW_ORDER_REVERSE_LIFETIME:
  102. .. rst-class:: classref-enumeration-constant
  103. :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **DRAW_ORDER_REVERSE_LIFETIME** = ``2``
  104. Particles are drawn in reverse order of remaining lifetime. In other words, the particle with the lowest lifetime is drawn at the front.
  105. .. rst-class:: classref-item-separator
  106. ----
  107. .. _enum_GPUParticles2D_EmitFlags:
  108. .. rst-class:: classref-enumeration
  109. enum **EmitFlags**:
  110. .. _class_GPUParticles2D_constant_EMIT_FLAG_POSITION:
  111. .. rst-class:: classref-enumeration-constant
  112. :ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_POSITION** = ``1``
  113. Particle starts at the specified position.
  114. .. _class_GPUParticles2D_constant_EMIT_FLAG_ROTATION_SCALE:
  115. .. rst-class:: classref-enumeration-constant
  116. :ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_ROTATION_SCALE** = ``2``
  117. Particle starts with specified rotation and scale.
  118. .. _class_GPUParticles2D_constant_EMIT_FLAG_VELOCITY:
  119. .. rst-class:: classref-enumeration-constant
  120. :ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_VELOCITY** = ``4``
  121. Particle starts with the specified velocity vector, which defines the emission direction and speed.
  122. .. _class_GPUParticles2D_constant_EMIT_FLAG_COLOR:
  123. .. rst-class:: classref-enumeration-constant
  124. :ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_COLOR** = ``8``
  125. Particle starts with specified color.
  126. .. _class_GPUParticles2D_constant_EMIT_FLAG_CUSTOM:
  127. .. rst-class:: classref-enumeration-constant
  128. :ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>` **EMIT_FLAG_CUSTOM** = ``16``
  129. Particle starts with specified ``CUSTOM`` data.
  130. .. rst-class:: classref-section-separator
  131. ----
  132. .. rst-class:: classref-descriptions-group
  133. Property Descriptions
  134. ---------------------
  135. .. _class_GPUParticles2D_property_amount:
  136. .. rst-class:: classref-property
  137. :ref:`int<class_int>` **amount** = ``8``
  138. .. rst-class:: classref-property-setget
  139. - void **set_amount** **(** :ref:`int<class_int>` value **)**
  140. - :ref:`int<class_int>` **get_amount** **(** **)**
  141. Number of particles emitted in one emission cycle.
  142. .. rst-class:: classref-item-separator
  143. ----
  144. .. _class_GPUParticles2D_property_collision_base_size:
  145. .. rst-class:: classref-property
  146. :ref:`float<class_float>` **collision_base_size** = ``1.0``
  147. .. rst-class:: classref-property-setget
  148. - void **set_collision_base_size** **(** :ref:`float<class_float>` value **)**
  149. - :ref:`float<class_float>` **get_collision_base_size** **(** **)**
  150. Multiplier for particle's collision radius. ``1.0`` corresponds to the size of the sprite.
  151. .. rst-class:: classref-item-separator
  152. ----
  153. .. _class_GPUParticles2D_property_draw_order:
  154. .. rst-class:: classref-property
  155. :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **draw_order** = ``1``
  156. .. rst-class:: classref-property-setget
  157. - void **set_draw_order** **(** :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` value **)**
  158. - :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` **get_draw_order** **(** **)**
  159. Particle draw order. Uses :ref:`DrawOrder<enum_GPUParticles2D_DrawOrder>` values.
  160. .. rst-class:: classref-item-separator
  161. ----
  162. .. _class_GPUParticles2D_property_emitting:
  163. .. rst-class:: classref-property
  164. :ref:`bool<class_bool>` **emitting** = ``true``
  165. .. rst-class:: classref-property-setget
  166. - void **set_emitting** **(** :ref:`bool<class_bool>` value **)**
  167. - :ref:`bool<class_bool>` **is_emitting** **(** **)**
  168. If ``true``, particles are being emitted.
  169. .. rst-class:: classref-item-separator
  170. ----
  171. .. _class_GPUParticles2D_property_explosiveness:
  172. .. rst-class:: classref-property
  173. :ref:`float<class_float>` **explosiveness** = ``0.0``
  174. .. rst-class:: classref-property-setget
  175. - void **set_explosiveness_ratio** **(** :ref:`float<class_float>` value **)**
  176. - :ref:`float<class_float>` **get_explosiveness_ratio** **(** **)**
  177. How rapidly particles in an emission cycle are emitted. If greater than ``0``, there will be a gap in emissions before the next cycle begins.
  178. .. rst-class:: classref-item-separator
  179. ----
  180. .. _class_GPUParticles2D_property_fixed_fps:
  181. .. rst-class:: classref-property
  182. :ref:`int<class_int>` **fixed_fps** = ``30``
  183. .. rst-class:: classref-property-setget
  184. - void **set_fixed_fps** **(** :ref:`int<class_int>` value **)**
  185. - :ref:`int<class_int>` **get_fixed_fps** **(** **)**
  186. The particle system's frame rate is fixed to a value. For example, changing the value to 2 will make the particles render at 2 frames per second. Note this does not slow down the simulation of the particle system itself.
  187. .. rst-class:: classref-item-separator
  188. ----
  189. .. _class_GPUParticles2D_property_fract_delta:
  190. .. rst-class:: classref-property
  191. :ref:`bool<class_bool>` **fract_delta** = ``true``
  192. .. rst-class:: classref-property-setget
  193. - void **set_fractional_delta** **(** :ref:`bool<class_bool>` value **)**
  194. - :ref:`bool<class_bool>` **get_fractional_delta** **(** **)**
  195. If ``true``, results in fractional delta calculation which has a smoother particles display effect.
  196. .. rst-class:: classref-item-separator
  197. ----
  198. .. _class_GPUParticles2D_property_interpolate:
  199. .. rst-class:: classref-property
  200. :ref:`bool<class_bool>` **interpolate** = ``true``
  201. .. rst-class:: classref-property-setget
  202. - void **set_interpolate** **(** :ref:`bool<class_bool>` value **)**
  203. - :ref:`bool<class_bool>` **get_interpolate** **(** **)**
  204. Enables particle interpolation, which makes the particle movement smoother when their :ref:`fixed_fps<class_GPUParticles2D_property_fixed_fps>` is lower than the screen refresh rate.
  205. .. rst-class:: classref-item-separator
  206. ----
  207. .. _class_GPUParticles2D_property_lifetime:
  208. .. rst-class:: classref-property
  209. :ref:`float<class_float>` **lifetime** = ``1.0``
  210. .. rst-class:: classref-property-setget
  211. - void **set_lifetime** **(** :ref:`float<class_float>` value **)**
  212. - :ref:`float<class_float>` **get_lifetime** **(** **)**
  213. Amount of time each particle will exist.
  214. .. rst-class:: classref-item-separator
  215. ----
  216. .. _class_GPUParticles2D_property_local_coords:
  217. .. rst-class:: classref-property
  218. :ref:`bool<class_bool>` **local_coords** = ``false``
  219. .. rst-class:: classref-property-setget
  220. - void **set_use_local_coordinates** **(** :ref:`bool<class_bool>` value **)**
  221. - :ref:`bool<class_bool>` **get_use_local_coordinates** **(** **)**
  222. If ``true``, particles use the parent node's coordinate space (known as local coordinates). This will cause particles to move and rotate along the **GPUParticles2D** node (and its parents) when it is moved or rotated. If ``false``, particles use global coordinates; they will not move or rotate along the **GPUParticles2D** node (and its parents) when it is moved or rotated.
  223. .. rst-class:: classref-item-separator
  224. ----
  225. .. _class_GPUParticles2D_property_one_shot:
  226. .. rst-class:: classref-property
  227. :ref:`bool<class_bool>` **one_shot** = ``false``
  228. .. rst-class:: classref-property-setget
  229. - void **set_one_shot** **(** :ref:`bool<class_bool>` value **)**
  230. - :ref:`bool<class_bool>` **get_one_shot** **(** **)**
  231. If ``true``, only one emission cycle occurs. If set ``true`` during a cycle, emission will stop at the cycle's end.
  232. .. rst-class:: classref-item-separator
  233. ----
  234. .. _class_GPUParticles2D_property_preprocess:
  235. .. rst-class:: classref-property
  236. :ref:`float<class_float>` **preprocess** = ``0.0``
  237. .. rst-class:: classref-property-setget
  238. - void **set_pre_process_time** **(** :ref:`float<class_float>` value **)**
  239. - :ref:`float<class_float>` **get_pre_process_time** **(** **)**
  240. Particle system starts as if it had already run for this many seconds.
  241. .. rst-class:: classref-item-separator
  242. ----
  243. .. _class_GPUParticles2D_property_process_material:
  244. .. rst-class:: classref-property
  245. :ref:`Material<class_Material>` **process_material**
  246. .. rst-class:: classref-property-setget
  247. - void **set_process_material** **(** :ref:`Material<class_Material>` value **)**
  248. - :ref:`Material<class_Material>` **get_process_material** **(** **)**
  249. :ref:`Material<class_Material>` for processing particles. Can be a :ref:`ParticleProcessMaterial<class_ParticleProcessMaterial>` or a :ref:`ShaderMaterial<class_ShaderMaterial>`.
  250. .. rst-class:: classref-item-separator
  251. ----
  252. .. _class_GPUParticles2D_property_randomness:
  253. .. rst-class:: classref-property
  254. :ref:`float<class_float>` **randomness** = ``0.0``
  255. .. rst-class:: classref-property-setget
  256. - void **set_randomness_ratio** **(** :ref:`float<class_float>` value **)**
  257. - :ref:`float<class_float>` **get_randomness_ratio** **(** **)**
  258. Emission lifetime randomness ratio.
  259. .. rst-class:: classref-item-separator
  260. ----
  261. .. _class_GPUParticles2D_property_speed_scale:
  262. .. rst-class:: classref-property
  263. :ref:`float<class_float>` **speed_scale** = ``1.0``
  264. .. rst-class:: classref-property-setget
  265. - void **set_speed_scale** **(** :ref:`float<class_float>` value **)**
  266. - :ref:`float<class_float>` **get_speed_scale** **(** **)**
  267. Particle system's running speed scaling ratio. A value of ``0`` can be used to pause the particles.
  268. .. rst-class:: classref-item-separator
  269. ----
  270. .. _class_GPUParticles2D_property_sub_emitter:
  271. .. rst-class:: classref-property
  272. :ref:`NodePath<class_NodePath>` **sub_emitter** = ``NodePath("")``
  273. .. rst-class:: classref-property-setget
  274. - void **set_sub_emitter** **(** :ref:`NodePath<class_NodePath>` value **)**
  275. - :ref:`NodePath<class_NodePath>` **get_sub_emitter** **(** **)**
  276. The :ref:`NodePath<class_NodePath>` to the **GPUParticles2D** used for sub-emissions.
  277. .. rst-class:: classref-item-separator
  278. ----
  279. .. _class_GPUParticles2D_property_texture:
  280. .. rst-class:: classref-property
  281. :ref:`Texture2D<class_Texture2D>` **texture**
  282. .. rst-class:: classref-property-setget
  283. - void **set_texture** **(** :ref:`Texture2D<class_Texture2D>` value **)**
  284. - :ref:`Texture2D<class_Texture2D>` **get_texture** **(** **)**
  285. Particle texture. If ``null``, particles will be squares.
  286. .. rst-class:: classref-item-separator
  287. ----
  288. .. _class_GPUParticles2D_property_trail_enabled:
  289. .. rst-class:: classref-property
  290. :ref:`bool<class_bool>` **trail_enabled** = ``false``
  291. .. rst-class:: classref-property-setget
  292. - void **set_trail_enabled** **(** :ref:`bool<class_bool>` value **)**
  293. - :ref:`bool<class_bool>` **is_trail_enabled** **(** **)**
  294. If ``true``, enables particle trails using a mesh skinning system.
  295. \ **Note:** Unlike :ref:`GPUParticles3D<class_GPUParticles3D>`, the number of trail sections and subdivisions is set with the :ref:`trail_sections<class_GPUParticles2D_property_trail_sections>` and :ref:`trail_section_subdivisions<class_GPUParticles2D_property_trail_section_subdivisions>` properties.
  296. .. rst-class:: classref-item-separator
  297. ----
  298. .. _class_GPUParticles2D_property_trail_lifetime:
  299. .. rst-class:: classref-property
  300. :ref:`float<class_float>` **trail_lifetime** = ``0.3``
  301. .. rst-class:: classref-property-setget
  302. - void **set_trail_lifetime** **(** :ref:`float<class_float>` value **)**
  303. - :ref:`float<class_float>` **get_trail_lifetime** **(** **)**
  304. The amount of time the particle's trail should represent (in seconds). Only effective if :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>` is ``true``.
  305. .. rst-class:: classref-item-separator
  306. ----
  307. .. _class_GPUParticles2D_property_trail_section_subdivisions:
  308. .. rst-class:: classref-property
  309. :ref:`int<class_int>` **trail_section_subdivisions** = ``4``
  310. .. rst-class:: classref-property-setget
  311. - void **set_trail_section_subdivisions** **(** :ref:`int<class_int>` value **)**
  312. - :ref:`int<class_int>` **get_trail_section_subdivisions** **(** **)**
  313. The number of subdivisions to use for the particle trail rendering. Higher values can result in smoother trail curves, at the cost of performance due to increased mesh complexity. See also :ref:`trail_sections<class_GPUParticles2D_property_trail_sections>`. Only effective if :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>` is ``true``.
  314. .. rst-class:: classref-item-separator
  315. ----
  316. .. _class_GPUParticles2D_property_trail_sections:
  317. .. rst-class:: classref-property
  318. :ref:`int<class_int>` **trail_sections** = ``8``
  319. .. rst-class:: classref-property-setget
  320. - void **set_trail_sections** **(** :ref:`int<class_int>` value **)**
  321. - :ref:`int<class_int>` **get_trail_sections** **(** **)**
  322. The number of sections to use for the particle trail rendering. Higher values can result in smoother trail curves, at the cost of performance due to increased mesh complexity. See also :ref:`trail_section_subdivisions<class_GPUParticles2D_property_trail_section_subdivisions>`. Only effective if :ref:`trail_enabled<class_GPUParticles2D_property_trail_enabled>` is ``true``.
  323. .. rst-class:: classref-item-separator
  324. ----
  325. .. _class_GPUParticles2D_property_visibility_rect:
  326. .. rst-class:: classref-property
  327. :ref:`Rect2<class_Rect2>` **visibility_rect** = ``Rect2(-100, -100, 200, 200)``
  328. .. rst-class:: classref-property-setget
  329. - void **set_visibility_rect** **(** :ref:`Rect2<class_Rect2>` value **)**
  330. - :ref:`Rect2<class_Rect2>` **get_visibility_rect** **(** **)**
  331. The :ref:`Rect2<class_Rect2>` that determines the node's region which needs to be visible on screen for the particle system to be active.
  332. Grow the rect if particles suddenly appear/disappear when the node enters/exits the screen. The :ref:`Rect2<class_Rect2>` can be grown via code or with the **Particles → Generate Visibility Rect** editor tool.
  333. .. rst-class:: classref-section-separator
  334. ----
  335. .. rst-class:: classref-descriptions-group
  336. Method Descriptions
  337. -------------------
  338. .. _class_GPUParticles2D_method_capture_rect:
  339. .. rst-class:: classref-method
  340. :ref:`Rect2<class_Rect2>` **capture_rect** **(** **)** |const|
  341. Returns a rectangle containing the positions of all existing particles.
  342. .. rst-class:: classref-item-separator
  343. ----
  344. .. _class_GPUParticles2D_method_emit_particle:
  345. .. rst-class:: classref-method
  346. void **emit_particle** **(** :ref:`Transform2D<class_Transform2D>` xform, :ref:`Vector2<class_Vector2>` velocity, :ref:`Color<class_Color>` color, :ref:`Color<class_Color>` custom, :ref:`int<class_int>` flags **)**
  347. Emits a single particle. Whether ``xform``, ``velocity``, ``color`` and ``custom`` are applied depends on the value of ``flags``. See :ref:`EmitFlags<enum_GPUParticles2D_EmitFlags>`.
  348. .. rst-class:: classref-item-separator
  349. ----
  350. .. _class_GPUParticles2D_method_restart:
  351. .. rst-class:: classref-method
  352. void **restart** **(** **)**
  353. Restarts all the existing particles.
  354. .. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
  355. .. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
  356. .. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
  357. .. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
  358. .. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
  359. .. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`
  360. .. |bitfield| replace:: :abbr:`BitField (This value is an integer composed as a bitmask of the following flags.)`