61 lines
2.4 KiB
Rust
61 lines
2.4 KiB
Rust
use bevy::prelude::*;
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use fixed::traits::Fixed;
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use crate::fighter::*;
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pub fn integrate_gravity(velocity: &mut FighterVelocity, attributes: &FighterAttributes) {
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velocity.y -= attributes.gravity;
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velocity.y = velocity.y.max(-attributes.terminal_velocity);
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}
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pub fn apply_air_drift(velocity: &mut FighterVelocity, attribs: &FighterAttributes, input: &FighterInput) {
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if input.get_last_frame().movement.x.is_zero() {
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if velocity.x.abs() < attribs.air_friction {
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velocity.x = FGi32::ZERO;
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} else {
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let velocity_sign = velocity.x.signum();
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velocity.x += (-velocity_sign) * attribs.air_friction;
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}
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} else {
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let target_velocity = input.get_last_frame().movement.x.signum() * attribs.max_air_horizontal_velocity;
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let acceleration = input.get_last_frame().movement.x.signum() * attribs.air_acceleration_base;
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let mut acceleration = acceleration + input.get_last_frame().movement.x * attribs.air_acceleration_stick;
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let velocity_x = velocity.x;
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if !(velocity_x * acceleration < FGi32::ZERO) {
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if acceleration > FGi32::ZERO {
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if velocity_x + acceleration > target_velocity {
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acceleration = -attribs.air_friction;
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if velocity_x + acceleration < target_velocity {
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acceleration = target_velocity - velocity_x;
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}
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if velocity_x + acceleration > attribs.max_air_horizontal_velocity {
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acceleration = attribs.max_air_horizontal_velocity - velocity_x;
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}
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}
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} else if velocity_x + acceleration < target_velocity {
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acceleration = attribs.air_friction;
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if velocity_x + acceleration > target_velocity {
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acceleration = target_velocity - velocity_x;
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}
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if velocity_x + acceleration < -attribs.max_air_horizontal_velocity {
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acceleration = -attribs.max_air_horizontal_velocity - velocity_x;
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}
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}
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}
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velocity.x += acceleration;
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}
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}
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pub fn apply_air_motion(
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velocity: &FighterVelocity,
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translation: &mut FighterTranslation,
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prev_translation: &mut FighterPreviousTranslation,
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) {
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// Vertical velocity should be 0 on the ground
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prev_translation.0 = translation.0;
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translation.0 += velocity.0;
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}
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