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Remove gravity rather than reset velocity in unloaded chunks

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This commit is contained in:
Imbris 2020-07-18 07:08:38 -04:00
parent 1f1d9c5625
commit c7e8a6bfae
1 changed files with 7 additions and 6 deletions
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13
common/src/sys/phys.rs
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@ -117,7 +117,12 @@ impl<'a> System<'a> for Sys {
} else {
0.0
});
let downward_force = if physics_state.in_fluid {
let in_loaded_chunk = terrain
.get_key(terrain.pos_key(pos.0.map(|e| e.floor() as i32)))
.is_some();
let downward_force = if !in_loaded_chunk {
0.0 // No gravity in unloaded chunks
} else if physics_state.in_fluid {
(1.0 - BOUYANCY) * GRAVITY
} else {
GRAVITY
@ -125,16 +130,12 @@ impl<'a> System<'a> for Sys {
vel.0 = integrate_forces(dt.0, vel.0, downward_force, friction);
// Don't move if we're not in a loaded chunk
let mut pos_delta = if terrain
.get_key(terrain.pos_key(pos.0.map(|e| e.floor() as i32)))
.is_some()
{
let mut pos_delta = if in_loaded_chunk {
// this is an approximation that allows most framerates to
// behave in a similar manner.
let dt_lerp = 0.2;
(vel.0 * dt_lerp + old_vel.0 * (1.0 - dt_lerp)) * dt.0
} else {
vel.0 = Vec3::zero();
Vec3::zero()
};