JosephFerano/asteroids-odin
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Replace swap n pop for unordered_remove and check bullet/asteroid collisions even if dead

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This commit is contained in:
Joseph Ferano 2024-08-26 18:04:41 +07:00
parent 2f00e14632
commit 573891918b
1 changed files with 18 additions and 51 deletions
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69
game.odin
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@ -13,7 +13,6 @@ SCREEN_HEIGHT : i32 = 800
BW := f32(SCREEN_WIDTH)
BH := f32(SCREEN_HEIGHT)
SCALE: f32 = 0.37
SHIP_W: f32 = 70 * SCALE
SHIP_H: f32 = 100 * SCALE
@ -63,8 +62,6 @@ GameState :: struct {
player_state: PlayerState,
bullets: [dynamic]Bullet,
asteroids: [dynamic]Asteroid,
bullet_pop_idxs: [dynamic]int,
asteroid_pop_idxs: [dynamic]int,
}
update_ship_shape :: proc(p : ^Player) {
@ -79,16 +76,6 @@ random_direction :: proc() -> Vec2 {
return {math.cos(angle), math.sin(angle)}
}
swap_n_pop :: proc(bullets: ^[dynamic]$T, idx: int) {
last := len(bullets) - 1
if last == 0 {
clear(bullets)
} else {
bullets[last], bullets[idx] = bullets[idx], bullets[last]
pop(bullets)
}
}
init_state :: proc() -> ^GameState {
start_pos := Vec2{BW / 2 - SHIP_W / 2, BH / 2 - SHIP_H / 2}
player_state := Player {
@ -101,8 +88,6 @@ init_state :: proc() -> ^GameState {
player_state = player_state,
bullets = make([dynamic]Bullet, 0, 64),
asteroids = make([dynamic]Asteroid, 0, 64),
asteroid_pop_idxs = make([dynamic]int, 0, 64),
bullet_pop_idxs = make([dynamic]int, 0, 64),
}
get_rand_angle :: proc(min: i32, max: i32) -> f32 {
@ -163,35 +148,6 @@ update :: proc(s: ^GameState) {
}
}
}
for i := 0; i < len(s.bullets); i += 1 {
if ( s.bullets[i].pos.x < 0 || s.bullets[i].pos.x > BW
|| s.bullets[i].pos.y < 0 || s.bullets[i].pos.y > BH) {
append(&s.bullet_pop_idxs, i)
}
s.bullets[i].pos += s.bullets[i].vel
for j := 0; j < len(s.asteroids); j += 1 {
if rl.CheckCollisionCircleRec(s.bullets[i].pos, BULLET_RADIUS, s.asteroids[j].rect) {
append(&s.bullet_pop_idxs, i)
append(&s.asteroid_pop_idxs, j)
}
}
}
bpi_len := len(s.bullet_pop_idxs)
for i := 0; i < bpi_len; i += 1 {
swap_n_pop(&s.bullets, s.bullet_pop_idxs[i])
}
if bpi_len > 0 {
clear(&s.bullet_pop_idxs)
}
api_len := len(s.asteroid_pop_idxs)
for i := 0; i < api_len; i += 1 {
swap_n_pop(&s.asteroids, s.asteroid_pop_idxs[i])
}
if bpi_len > 0 {
clear(&s.asteroid_pop_idxs)
}
if ship_collision {
// Randomize everything
s.player_state = Death {
@ -214,18 +170,29 @@ update :: proc(s: ^GameState) {
part.points[0] += part.vel
part.points[1] += part.vel
}
for i := 0; i < len(s.bullets); i += 1 {
if ( s.bullets[i].pos.x < 0 || s.bullets[i].pos.x > BW
|| s.bullets[i].pos.y < 0 || s.bullets[i].pos.y > BH) {
append(&s.bullet_pop_idxs, i)
}
s.bullets[i].pos += s.bullets[i].vel
}
for i := 0; i < len(s.asteroids); i += 1 {
s.asteroids[i].rect.x += s.asteroids[i].vel.x * s.dt
s.asteroids[i].rect.y += s.asteroids[i].vel.y * s.dt
}
}
for i := len(s.bullets) - 1; i >= 0; i -= 1 {
if ( s.bullets[i].pos.x < 0 || s.bullets[i].pos.x > BW
|| s.bullets[i].pos.y < 0 || s.bullets[i].pos.y > BH) {
unordered_remove(&s.bullets, i)
continue
}
s.bullets[i].pos += s.bullets[i].vel
collided := false
for j := len(s.asteroids) - 1; j >= 0; j -= 1 {
if rl.CheckCollisionCircleRec(s.bullets[i].pos, BULLET_RADIUS, s.asteroids[j].rect) {
collided = true
unordered_remove(&s.asteroids, j)
}
}
if collided {
unordered_remove(&s.bullets, i)
}
}
}
draw2d :: proc(s: ^GameState) {