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Improve glider handling

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This commit is contained in:
Ludvig Böklin 2021-04-25 14:28:49 +02:00
parent 0f6f7a9096
commit 91a8b19863
1 changed files with 43 additions and 38 deletions
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81
common/src/states/glide.rs
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@ -1,10 +1,14 @@
use super::utils::handle_climb;
use crate::{
comp::{inventory::slot::EquipSlot, CharacterState, Ori, StateUpdate},
comp::{
fluid_dynamics::angle_of_attack, inventory::slot::EquipSlot, CharacterState, Ori,
StateUpdate,
},
states::behavior::{CharacterBehavior, JoinData},
util::Dir,
util::{Dir, Plane, Projection},
};
use serde::{Deserialize, Serialize};
use std::f32::consts::PI;
use vek::*;
#[derive(Copy, Clone, Debug, PartialEq, Serialize, Deserialize)]
@ -24,7 +28,7 @@ impl Data {
///
/// https://en.wikipedia.org/wiki/Elliptical_wing
pub fn new(span_length: f32, chord_length: f32, ori: Ori) -> Self {
let planform_area = std::f32::consts::PI * chord_length * span_length * 0.25;
let planform_area = PI * chord_length * span_length * 0.25;
Self {
aspect_ratio: span_length.powi(2) / planform_area,
planform_area,
@ -53,53 +57,54 @@ impl CharacterBehavior for Data {
} else if handle_climb(&data, &mut update) {
update
} else {
let tgt_ori = Some(data.inputs.move_dir)
let slerp_s = {
let angle = self.ori.look_dir().angle_between(*data.inputs.look_dir);
let rate = 0.4 * PI / angle;
(data.dt.0 * rate).min(0.1)
};
let ori = Some(data.inputs.move_dir)
.filter(|mv_dir| !mv_dir.is_approx_zero())
.map(|mv_dir| {
Vec3::new(
mv_dir.x,
mv_dir.y,
Lerp::lerp_unclamped(
0.0,
data.inputs.look_dir.z + 0.3,
mv_dir.magnitude_squared() * 2.0,
),
)
})
.or_else(|| self.ori.look_dir().xy().try_normalized())
.map(|mv_dir| Vec3::new(mv_dir.x, mv_dir.y, (data.inputs.look_dir.z + 0.3) * 2.0))
.and_then(Dir::from_unnormalized)
.and_then(|tgt_dir| {
Dir::from_unnormalized(data.vel.0)
.and_then(|moving_dir| moving_dir.to_horizontal())
.or_else(|| self.ori.look_dir().to_horizontal())
.map(|moving_dir| {
Ori::from(tgt_dir).rolled_right(
(1.0 - moving_dir.dot(*tgt_dir).max(0.0))
* self.ori.right().dot(*tgt_dir).signum()
* std::f32::consts::PI
/ 3.0,
data.physics
.in_fluid
.map(|fluid| fluid.relative_flow(data.vel))
.and_then(|air_flow| {
let flow_dir = Dir::from_unnormalized(air_flow.0)?;
let tgt_dir_ori = Ori::from(tgt_dir);
let tgt_dir_up = tgt_dir_ori.up();
let tgt_up = flow_dir.projected(&Plane::from(tgt_dir)).map(|d| {
let ddot = d.dot(*tgt_dir_up);
if ddot.is_sign_negative() {
Quaternion::rotation_3d(PI, *tgt_dir_ori.right()) * d
} else {
d
}
.slerped_to(tgt_dir_up, 0.25 * ddot.abs().powf(0.25))
})?;
let global_roll = tgt_dir_up.rotation_between(tgt_up);
Some(
tgt_dir_ori
.prerotated(global_roll)
.pitched_up(angle_of_attack(&tgt_dir_ori, &flow_dir)),
)
})
})
.unwrap_or_else(|| self.ori.uprighted());
.map(|tgt_ori| self.ori.slerped_towards(tgt_ori, slerp_s))
.unwrap_or_else(|| self.ori.slerped_towards(self.ori.uprighted(), slerp_s));
let rate = {
let angle = self.ori.look_dir().angle_between(*data.inputs.look_dir);
0.4 * std::f32::consts::PI / angle
};
let ori = self
.ori
.slerped_towards(tgt_ori, (data.dt.0 * rate).min(0.1));
update.character = CharacterState::Glide(Self { ori, ..*self });
if let Some(char_ori) = ori.to_horizontal() {
let rate = {
let slerp_s = {
let angle = ori.look_dir().angle_between(*data.inputs.look_dir);
data.body.base_ori_rate() * std::f32::consts::PI / angle
let rate = data.body.base_ori_rate() * PI / angle;
(data.dt.0 * rate).min(0.1)
};
update.ori = update
.ori
.slerped_towards(char_ori, (data.dt.0 * rate).min(0.1));
update.ori = update.ori.slerped_towards(char_ori, slerp_s);
}
update
}