功能修复

src/export/spineJsonExporter.ts

@@ -10,7 +10,7 @@ import { collectSubEmitterIds } from '../core/subEmitterIds'
 import { translate } from '../i18n'
 
 type Track = { key: string; name: string; states: Array<ParticleState | null> }
-type ExportInput = { systems: ParticleSystem[]; timeline: TimelineState; settings: SpineExportSettings }
+type ExportInput = { systems: ParticleSystem[]; timeline: TimelineState; settings: SpineExportSettings; playbackEnd?: number }
 
 const BLENDS = { normal: 'normal', add: 'additive', multiply: 'multiply', screen: 'screen' } as const
 const PARTICLE_POSITION_TOLERANCE = 0.1
@@ -343,9 +343,12 @@ export function buildSpineJson(input: ExportInput): SpineExportResult {
 
   for (const system of visibleSystems) {
     const frameLength = system.frames?.length || 0
+    const playbackFrameCount = Number.isFinite(input.playbackEnd)
+      ? Math.min(frameLength, Math.max(1, Math.floor(Number(input.playbackEnd)) + 1))
+      : frameLength
     const sourceCount = subEmitterIds.has(system.id)
-      ? frameLength
-      : Math.min(frameLength, particleDurationFrames(system, sourceFps))
+      ? playbackFrameCount
+      : Math.min(playbackFrameCount, particleDurationFrames(system, sourceFps))
     const frames = (system.frames || []).slice(0, sourceCount)
     if (!frames.length) warnings.push({ code: 'empty-cache', message: translate('errors.emptyCacheWarning', { name: system.config.name }) })
     const prefix = uniqueName(safeName(system.config.name, `system_${system.id}`), usedNames)