137 lines
3.1 KiB
Rust
137 lines
3.1 KiB
Rust
use opengl_rust::{
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prelude::*,
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physics::PhysicsBody,
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};
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use crate::{
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LoadedLevel,
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StaticLevel,
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VirtualGamepad,
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};
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#[derive (Clone, Default)]
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pub struct LogicState {
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pub player: PhysicsBody,
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player_jump_vec: Option <Vec3>,
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}
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#[derive (Clone, Copy, Default)]
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pub struct LogicStepOutput {
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pub reset_level: bool,
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}
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impl LogicState {
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pub fn reset_level (&mut self, level: &LoadedLevel) {
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self.player = Default::default ();
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self.player.pos = level.player_spawn;
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}
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pub fn step (&mut self, static_level: &StaticLevel, phys_params: &opengl_rust::physics::Params, p_gp: VirtualGamepad) -> LogicStepOutput
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{
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let player_acc = 1.0;
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let player_acc_air = 0.125;
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let player_max_speed = 4.0;
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let player_max_speed_air = 8.0;
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let player_jump_speed = 12.0;
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let kill_z = -3.0;
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let mut output = LogicStepOutput::default ();
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let mut wanted_dir = Vec3::default ();
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if p_gp.d_left.any_press () {
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wanted_dir.x -= 1.0;
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}
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if p_gp.d_right.any_press () {
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wanted_dir.x += 1.0;
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}
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if p_gp.d_up.any_press () {
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wanted_dir.y += 1.0;
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}
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if p_gp.d_down.any_press () {
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wanted_dir.y -= 1.0;
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}
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let wanted_dir = if wanted_dir.length_squared () >= 1.0 {
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wanted_dir.normalize ()
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}
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else {
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wanted_dir
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};
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let wanted_dir = wanted_dir;
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let old_vel = self.player.vel;
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let old_vel_2 = old_vel * Vec3::new (1.0, 1.0, 0.0);
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let new_vel_2 = match self.player_jump_vec.as_ref () {
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Some (v) => {
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// Ground
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let acc = player_acc * v.z * v.z;
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let wanted_vel = wanted_dir * player_max_speed;
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let diff = wanted_vel - old_vel_2;
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if diff.length_squared () < acc * acc {
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// We're near the wanted velocity, so snap to it
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wanted_vel
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}
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else {
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// We're not near the wanted velocity, so accelerate
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old_vel_2 + diff.normalize_or_zero () * acc
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}
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},
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// Air
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None => {
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let proposed_vel = old_vel_2 + wanted_dir * player_acc_air;
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if old_vel_2.length_squared () < player_max_speed_air * player_max_speed_air {
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// Air control is normal below player_max_speed
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proposed_vel
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}
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else {
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// If the player's input would push them beyond player_max_speed,
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// apply drag to preserve overall energy
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proposed_vel * old_vel_2.length () / proposed_vel.length ()
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}
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},
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};
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self.player.vel = new_vel_2;
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self.player.vel.z = old_vel.z;
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// dbg! (self.player.vel);
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if p_gp.jump.pressed {
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if let Some (normal) = self.player_jump_vec.clone () {
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self.player.vel.z = 0.0;
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self.player.vel += normal * player_jump_speed;
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}
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}
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let phys_result = opengl_rust::physics::step (&phys_params, &static_level.tris, &[], 0.5, &self.player);
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self.player = phys_result.body;
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if self.player.pos.z < kill_z {
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output.reset_level = true;
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}
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// tracing::debug! ("player pos: {}", self.player.pos);
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self.player_jump_vec = None;
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for normal in &phys_result.normals_hit {
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self.player_jump_vec = Some (match self.player_jump_vec {
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None => *normal,
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Some (old) => {
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if normal.z > old.z {
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*normal
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}
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else {
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old
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}
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},
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});
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}
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output
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}
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}
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