Improve demo delag interpolation and sampling#101
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alcachofass merged 1 commit intoJul 21, 2026
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Replace clamped endpoint handling with continuous interpolation and add robust pose sampling for demo delag. - Removed demoDelagDisplayServerTime. - entityPoseFromBracket: always evaluate both endpoint trajectories at their snapshot times, clamp frac to [0,1], and lerp positions/angles so frac==0/1 remain continuous with the open interval; choose solid based on frac. - Added demoDelagSamplePoseAtTime: prefer live snap↔nextSnap sampling, fall back to history bracket/envelope, and clamp lookups past newest history. - Updated CG_DemoHistory_AdjustPlayerLerpForDemoDelag and CG_DemoHistory_AdjustMissileLerpForDemoDelag to rewind endpoints by ping and interpolate using cg.frameInterpolation, with sensible fallbacks and caching. Result: smoother, continuous motion during demo delag and fewer snapping artifacts.
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While watching some demos, I noticed interpolation, although implemented for demo de-lagging, didn't always get applied. Opponents were shown making stepped movements, and not being interpolated between frames as they should be.
The core problem was the interpolation pathways that had been implemented were consistently being invalidated. So I replaced clamped endpoint handling with continuous interpolation and add robust pose sampling for demo delag:
Result: smoother, continuous motion during demo delag and fewer snapping artifacts.