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use glam::{IVec2, Vec2};
use rapier2d::dynamics::RigidBodyBuilder;
use crate::{
content::materials::MaterialId,
input::Input,
sim::{
cell::Cell,
entity::{EntityBehaviour, EntityCells, EntityDef, EntityUpdateCtx},
lib::force::apply_bullet,
sim_manager::SimCtx,
},
};
struct BulletEmitterEntityBehaviour {
shot_timer: f32,
life: f32,
target: Option<Vec2>,
}
impl EntityBehaviour for BulletEmitterEntityBehaviour {
fn update(&mut self, update_ctx: &mut EntityUpdateCtx, ctx: &mut SimCtx, delta_time: f32) {
if self.target.is_none() && ctx.input_manager.pressed(Input::Action4) {
self.target = Some(ctx.input_manager.world_mouse_pos);
}
if let Some(target) = self.target {
self.shot_timer -= delta_time;
if self.shot_timer <= 0.0 {
apply_bullet(
ctx,
update_ctx.entity_data.transform(ctx).unwrap().0,
target,
1000,
);
// self.shot_timer = 0.1;
update_ctx.deferred_destroy(update_ctx.entity_data.id);
}
self.life -= delta_time;
if self.life <= 0.0 {
update_ctx.deferred_destroy(update_ctx.entity_data.id);
}
}
}
}
pub fn entity_bullet_emitter_def(position: Vec2, life: f32) -> EntityDef {
let w = 6;
let h = 3;
let mut raw_cells = vec![Cell::void(); (w * h) as usize];
for x in 0..w {
for y in 0..h {
let cell_idx = x + y * w;
raw_cells[cell_idx as usize] = Cell::from_material(MaterialId::Steel);
raw_cells[cell_idx as usize].set_entity_integrated(true);
}
}
let entity_cells = EntityCells {
cells: raw_cells,
size: IVec2::new(w, h),
};
let rb = RigidBodyBuilder::dynamic()
.translation(position)
.gravity_scale(0.0)
.build();
EntityDef::from_cells_and_rb(
entity_cells,
rb,
Some(Box::new(BulletEmitterEntityBehaviour {
shot_timer: 0.0,
life,
target: None,
})),
)
}
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