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Diffstat (limited to 'src/game/client/entity/interpolation.cc')
| -rw-r--r-- | src/game/client/entity/interpolation.cc | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/game/client/entity/interpolation.cc b/src/game/client/entity/interpolation.cc new file mode 100644 index 0000000..a9a3349 --- /dev/null +++ b/src/game/client/entity/interpolation.cc @@ -0,0 +1,64 @@ +#include "client/pch.hh" + +#include "client/entity/interpolation.hh" + +#include "core/math/constexpr.hh" + +#include "shared/entity/head.hh" +#include "shared/entity/transform.hh" + +#include "shared/world/dimension.hh" + +#include "shared/coord.hh" + +#include "client/globals.hh" + +static void transform_interpolate(float alpha) +{ + auto group = globals::dimension->entities.group<entity::client::TransformIntr>( + entt::get<entity::Transform, entity::client::TransformPrev>); + + for(auto [entity, interp, current, previous] : group.each()) { + interp.angles[0] = glm::mix(previous.angles[0], current.angles[0], alpha); + interp.angles[1] = glm::mix(previous.angles[1], current.angles[1], alpha); + interp.angles[2] = glm::mix(previous.angles[2], current.angles[2], alpha); + + // Figure out previous chunk-local floating-point coordinates transformed + // to the current WorldCoord's chunk domain coordinates; we're interpolating + // against these instead of using previous.position.local to prevent jittering + auto previous_shift = coord::to_relative(current.chunk, current.local, previous.chunk, previous.local); + auto previous_local = current.local + previous_shift; + + interp.chunk.x = current.chunk.x; + interp.chunk.y = current.chunk.y; + interp.chunk.z = current.chunk.z; + + interp.local.x = glm::mix(previous_local.x, current.local.x, alpha); + interp.local.y = glm::mix(previous_local.y, current.local.y, alpha); + interp.local.z = glm::mix(previous_local.z, current.local.z, alpha); + } +} + +static void head_interpolate(float alpha) +{ + auto group = globals::dimension->entities.group<entity::client::HeadIntr>(entt::get<entity::Head, entity::client::HeadPrev>); + + for(auto [entity, interp, current, previous] : group.each()) { + interp.angles[0] = glm::mix(previous.angles[0], current.angles[0], alpha); + interp.angles[1] = glm::mix(previous.angles[1], current.angles[1], alpha); + interp.angles[2] = glm::mix(previous.angles[2], current.angles[2], alpha); + + interp.offset.x = glm::mix(previous.offset.x, current.offset.x, alpha); + interp.offset.y = glm::mix(previous.offset.y, current.offset.y, alpha); + interp.offset.z = glm::mix(previous.offset.z, current.offset.z, alpha); + } +} + +void entity::interpolation::update(void) +{ + if(globals::dimension) { + auto alpha = static_cast<float>(globals::fixed_accumulator) / static_cast<float>(globals::fixed_frametime_us); + transform_interpolate(alpha); + head_interpolate(alpha); + } +}
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