particle support limit velocity over lifetime#2925

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hhhhkrx wants to merge 48 commits intogalacean:dev/2.0from

hhhhkrx:feat/limitParticle

Commits on Mar 16, 2026

feat: particle support limit velocity over lifetime
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feat: add Transform Feedback simulation for LimitVelocityOverLifetime

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refactor: clean up TransformFeedbackPrimitive and Simulator

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Commits on Mar 17, 2026

fix: align TF shader velocity system with correct module interactions

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refactor: simplify instance count assignment and streamline conditionals in particle modules
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fix: resolve GL conflict when modules dynamically enable during TF mode

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style: format ParticleGenerator

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refactor: use MeshTopology enum and improve TransformFeedback API

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refactor: clean architecture for TransformFeedbackPrimitive

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fix: unbind TF buffer after TF object unbind to clear global binding point

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refactor: polish TransformFeedbackPrimitive API and naming

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refactor: clean up LimitVelocityOverLifetimeModule

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fix: rename u_DragConstant to renderer_LVLDragConstant for naming consistency

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refactor: pass VertexBufferBinding to platform layer instead of raw buffers

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fix: clear stale TF buffer binding before bindBufferRange

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fix: ensure VAO A/B always correspond to binding A/B

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fix: guard limit velocity module enablement on WebGL1
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fix: use full VOL instantaneous value instead of delta

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fix: correct TF render path velocity split for stretched billboard
hhhhkrx
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refactor: move buffer layout to ParticleBufferUtils, rename TF to Feedback

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refactor: extract TransformFeedbackSimulator as reusable base

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fix: store TF position in simulation space instead of baked world coords

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fix: persist world-space FOL into base velocity like gravity
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refactor: rename _useTFMode to _useTransformFeedback, clean up comments

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perf: cache simulator reference in writeParticleData

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fix: project VOL into LVL target space for dampen and drag
hhhhkrx
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refactor: remove dead drag code from non-TF render path

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perf: reuse cached invWorldRotation in position integration

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refactor: clean up TF naming in ParticleGenerator

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refactor: rename volVelocity to instantVOLVelocity for clarity
hhhhkrx
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refactor: move TF pass after _updateShaderData to avoid duplicate uniform upload

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fix: guard drag curve min with RENDERER_LVL_DRAG_IS_RANDOM_TWO macro

hhhhkrx
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refactor: simplify ParticleGenerator feedback code

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refactor: rename abbreviated variables in LVL shader for clarity

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refactor: simplify _addFeedbackParticle with Vector3 API

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refactor: merge feedback/non-feedback instance buffer upload paths

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style: format ParticleGenerator

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refactor: rename particle_transform_feedback_update to particle_feedback_simulation

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fix: make e2e case deterministic with fixed random seed

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test: update e2e screenshots for particle cases

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fix: move a_Random2 declaration after FOL include to fix missing attribute

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fix: use CPU-side macros for a_Random2 conditional declaration

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perf: reuse instance VertexBufferBinding instead of creating per frame

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Commits on Mar 18, 2026