particle_render — GFX2D particle op

• 資料種類:table → rgba

• 呼叫:import gfx2d; gfx2d.particle_render(state, height, width, mode='add', fade=True)(或 opsgfx2d.get("particle_render"))

用法

把粒子狀態 splat 到 `rgba` 影像上。

> 以下的詳細說明為原文 —— 摘要與標題已翻譯。

Each particle is a radially symmetric `(1 - (r/R)^2)^2` kernel of radius

`size, weighted by its alpha and, when fade` is set, by the remaining

fraction of its life `(1 - age/life)`. Particles past their lifetime

contribute nothing.

`mode is "add"` (premultiplied additive — what a spark does; the

result is clipped at 1 and the clipped energy is *not* returned) or

`"over"` (each particle composited in array order, which is what a soft

smoke puff does).

Pure function of the state: no randomness enters here, so two calls on the

same state produce identical bytes.

參考(範例資料・文獻)

• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。

• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。

• 演算法的正典(作者・年份)與用途見上面的族使用指南。

可執行的範例(實際呼叫該運算子並已驗證的樣例)

• gfx2d_scene — py -3.11 examples/gfx2d_scene.py

型別可銜接的下一個運算子(可接受 rgba 作為輸入)

premultiply · alpha_composite · sprite_blit · sprite_transform · sprite_sheet_slice · nine_slice

同類別(particle)

particle_emit · particle_step

*Provenance: gfx2d.py — GFX2D 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.