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|
pub mod rb_entity;
use fxhash::FxHashMap;
use rapier2d::{
dynamics::{self},
geometry,
glamx::vec2,
math, prelude,
};
use crate::{
config::{CELLS_IN_CHUNK, CHUNK_SIZE, PHYSICS_DELTA_TIME, PIXELS_TO_METRES},
sim::{
cell::{cell::Cell, materials::MaterialId},
rb_sim::rb_entity::RbEntity,
},
};
pub struct PhysicsManager {
rigid_body_set: prelude::RigidBodySet,
collider_set: prelude::ColliderSet,
physics_pipeline: prelude::PhysicsPipeline,
integration_parameters: prelude::IntegrationParameters,
island_manager: prelude::IslandManager,
broad_phase: prelude::DefaultBroadPhase,
narrow_phase: prelude::NarrowPhase,
impulse_joint_set: prelude::ImpulseJointSet,
multibody_joint_set: prelude::MultibodyJointSet,
ccd_solver: prelude::CCDSolver,
}
impl PhysicsManager {
pub fn new() -> Self {
PhysicsManager {
rigid_body_set: prelude::RigidBodySet::new(),
collider_set: prelude::ColliderSet::new(),
physics_pipeline: prelude::PhysicsPipeline::new(),
integration_parameters: prelude::IntegrationParameters {
// 20 pixels <-> 1 meter
length_unit: PIXELS_TO_METRES,
dt: PHYSICS_DELTA_TIME,
..prelude::IntegrationParameters::default()
},
island_manager: prelude::IslandManager::new(),
broad_phase: prelude::DefaultBroadPhase::new(),
narrow_phase: prelude::NarrowPhase::new(),
impulse_joint_set: prelude::ImpulseJointSet::new(),
multibody_joint_set: prelude::MultibodyJointSet::new(),
ccd_solver: prelude::CCDSolver::new(),
}
}
}
pub struct RbSimManager {
physics_manager: PhysicsManager,
pub rb_entities: FxHashMap<u32, RbEntity>,
next_id: u32,
}
impl RbSimManager {
pub fn rb_tick(&mut self, delta_time: f32) {
let gravity = vec2(0.0, 9.81);
self.physics_manager.physics_pipeline.step(
gravity,
&self.physics_manager.integration_parameters,
&mut self.physics_manager.island_manager,
&mut self.physics_manager.broad_phase,
&mut self.physics_manager.narrow_phase,
&mut self.physics_manager.rigid_body_set,
&mut self.physics_manager.collider_set,
&mut self.physics_manager.impulse_joint_set,
&mut self.physics_manager.multibody_joint_set,
&mut self.physics_manager.ccd_solver,
&(),
&(),
);
}
pub fn create_rb_entity(
&mut self,
cells: Box<[Cell; CELLS_IN_CHUNK]>,
rb_parent: prelude::RigidBodyHandle,
) {
let id = self.next_id;
self.next_id += 1;
let entity: RbEntity = RbEntity {
id,
cells,
rb_parent,
};
self.rb_entities.insert(id, entity);
}
pub fn destroy_rb_entity(&mut self, entity_id: u32) {
if let Some(entity) = self.rb_entities.get(&entity_id) {
self.physics_manager.rigid_body_set.remove(
entity.rb_parent,
&mut self.physics_manager.island_manager,
&mut self.physics_manager.collider_set,
&mut self.physics_manager.impulse_joint_set,
&mut self.physics_manager.multibody_joint_set,
true,
);
self.rb_entities.remove(&entity_id);
}
}
pub fn get_rb_entity_transform(&self, entity_id: u32) -> Option<(f32, f32, f32, f32)> {
let entity = self.rb_entities.get(&entity_id);
match entity {
Some(entity) => {
let rb = self.physics_manager.rigid_body_set.get(entity.rb_parent);
rb.map(|rb| {
let position = rb.position();
let angle = position.rotation.angle();
(
position.translation.x * PIXELS_TO_METRES,
position.translation.y * PIXELS_TO_METRES,
angle.cos(),
angle.sin(),
)
})
}
None => return None,
}
}
pub fn test(&mut self) {
/* Create the ground. */
let collider =
geometry::ColliderBuilder::cuboid(100.0 / PIXELS_TO_METRES, 8.0 / PIXELS_TO_METRES)
.position(math::Pose2::from_translation(vec2(
0 as f32,
CHUNK_SIZE as f32 / PIXELS_TO_METRES,
)))
.build();
self.physics_manager.collider_set.insert(collider);
}
pub fn test_spawn_box(&mut self, x: f32, y: f32, material: MaterialId) {
/* Create the bouncing ball. */
let rigid_body = dynamics::RigidBodyBuilder::dynamic()
.translation(math::Vector::new(
x / PIXELS_TO_METRES,
y / PIXELS_TO_METRES,
))
.build();
let collider =
geometry::ColliderBuilder::cuboid(5.0 / PIXELS_TO_METRES, 5.0 / PIXELS_TO_METRES)
.build();
let ball_body_handle = self.physics_manager.rigid_body_set.insert(rigid_body);
self.physics_manager.collider_set.insert_with_parent(
collider,
ball_body_handle,
&mut self.physics_manager.rigid_body_set,
);
let mut test_cells = Box::new([Cell::void(); CELLS_IN_CHUNK]);
for x in CHUNK_SIZE / 2 - 5..CHUNK_SIZE / 2 + 5 {
for y in CHUNK_SIZE / 2 - 5..CHUNK_SIZE / 2 + 5 {
let cell_idx = x + y * CHUNK_SIZE;
test_cells[cell_idx as usize] = Cell::from_material(material);
}
}
self.create_rb_entity(test_cells, ball_body_handle);
}
pub fn new() -> Self {
RbSimManager {
physics_manager: PhysicsManager::new(),
rb_entities: FxHashMap::default(),
next_id: 0,
}
}
}
|
