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Fewer precision issues by using player-relative coordinate space

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Joshua Barretto 2021-03-13 02:24:36 +00:00 committed by Avi Weinstock
parent a32be4ac5a
commit b2ab1046c8
1 changed files with 14 additions and 12 deletions
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26
common/sys/src/phys.rs
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@ -632,12 +632,16 @@ impl<'a> PhysicsData<'a> {
let mut physics_state_delta = physics_state.clone();
// deliberately don't use scale yet here, because the 11.0/0.8
// thing is in the comp::Scale for visual reasons
let transform_from = Mat4::<f32>::translation_3d(pos_other.0)
* Mat4::from(ori_other.0)
* Mat4::<f32>::translation_3d(voxel_collider.translation);
let wpos = pos.0;
let transform_from =
Mat4::<f32>::translation_3d(pos_other.0 - wpos)
* Mat4::from(ori_other.0)
* Mat4::<f32>::translation_3d(voxel_collider.translation);
let transform_to = transform_from.inverted();
pos.0 = transform_to.mul_point(pos.0);
vel.0 = transform_to.mul_direction(vel.0 - vel_other.0);
let ori_to = Mat4::from(ori_other.0);
let ori_from = ori_to.inverted();
pos.0 = transform_to.mul_point(Vec3::zero());
vel.0 = ori_to.mul_direction(vel.0 - vel_other.0);
let cylinder = (radius, z_min, z_max);
cylinder_voxel_collision(
cylinder,
@ -647,20 +651,18 @@ impl<'a> PhysicsData<'a> {
transform_to.mul_direction(pos_delta),
&mut vel,
&mut physics_state_delta,
transform_to.mul_direction(vel_other.0),
ori_to.mul_direction(vel_other.0),
&read.dt,
false,
was_on_ground,
|entity, vel| {
land_on_grounds.push((
entity,
Vel(transform_from.mul_direction(vel.0)),
))
land_on_grounds
.push((entity, Vel(ori_from.mul_direction(vel.0))))
},
);
pos.0 = transform_from.mul_point(pos.0);
vel.0 = transform_from.mul_direction(vel.0) + vel_other.0;
pos.0 = transform_from.mul_point(pos.0) + wpos;
vel.0 = ori_from.mul_direction(vel.0) + vel_other.0;
// union in the state updates, so that the state isn't just based on
// the most recent terrain that collision was attempted with