dhkatzandClaude Opus 5.5
9d0faecf4d
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The particle library moves particles by their velocity times a tick's time at each tick; between ticks, the adapter (ModelInstance::render's call to ParticleSystem::render, redirected after checking it) draws them moved on by their velocity times the time since, then moves each back by its own velocity: ParticleSystem::render sorts them by distance, reordering them in memory, so restoring saved positions in order scrambled them. Like ParticleSystem::render, it only reads particles when there's a group (the library throws without one, which crashed the client). Co-Authored-By: Claude Opus 5.5 <[email protected]>
30 lines
1.7 KiB
C++
30 lines
1.7 KiB
C++
#pragma once
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// Our hooks into SceneWindow.dll's scene code, installed once, the first time an engine is made. Each replaces where
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// IMVU's code calls a function (an entry of an exported vtable, or a call instruction's target), after checking it
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// calls the function expected, with ours, which calls IMVU's: nothing else is changed, and nothing is if a check
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// fails (an unexpected SceneWindow.dll: the hooks' features are then off, and the client runs as it would without).
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//
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// - SceneViewer::step (the IFrameListener vtable): the client's tick, 30 times a second (SceneWindow.dll's runApp
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// calls stepFrame, which steps each scene viewer). Recorded, for the frame pacer and for drawing between ticks.
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// - ModelInstance::render's call to updateCalSkeleton, which poses the model before it's drawn: between ticks, the
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// model is posed at the time between them (its animations' times moved on by the fraction of a frame since the
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// tick; Cal3D poses between keyframes), then its animations are put back as they were.
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// - ModelInstance::render's call to ParticleSystem::render: between ticks, particles drawn moved on by their velocity
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// times the time since the tick (as the particle library moves them at each tick), then put back.
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// - CameraController::getCameraTransform (its exported vtable): between ticks, the camera where its easing toward its
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// target has brought it since the tick.
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#include <cstdint>
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namespace t5de::scene_hooks {
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void install();
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// Whether the hooks are installed.
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[[nodiscard]] bool installed();
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// When a scene viewer last stepped (QueryPerformanceCounter), or 0 if none has.
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[[nodiscard]] std::int64_t lastStep();
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} // namespace t5de::scene_hooks
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