Add recoil to the gun

1 files changed, 20 insertions, 11 deletions

diff --git a/src/player.odin b/src/player.odin
index 9c824b4..7483bab 100644
--- a/src/player.odin
+++ b/src/player.odin
@@ -21,7 +21,8 @@ PLAYER_DASH_TIME :: 0.15
 PLAYER_DASH_COOLDOWN :: 0.3
 
 PLAYER_GUN_HEIGHT :: 0
-PLAYER_GUN_DIST :: 5 // how far out to hold the gun
+PLAYER_GUN_DIST :: 7 // how far out to hold the gun
+PLAYER_GUN_KICKBACK :: 4 // how far to move the gun back when you shoot
 
 PLAYER_SCARF_DIST :: 5
 
@@ -34,7 +35,10 @@ Player_State :: enum {
 player: struct {
   body: phys.Body_Handle,
   sprite: Sprite,
-  gun_sprite: Sprite,
+  gun: struct {
+    sprite: Sprite,
+    kickback: f32,
+  },
   scarf: Tail(7),
   jump_buffer: f32,
   coyote_time: f32,
@@ -63,11 +67,11 @@ init_player :: proc() {
     math.floor(f32(player.sprite.height / 2)),
   }
 
-  init_sprite(&player.gun_sprite, .PISTOL)
+  init_sprite(&player.gun.sprite, .PISTOL)
 
-  player.gun_sprite.offset = Vec2 {
+  player.gun.sprite.offset = Vec2 {
     -PLAYER_GUN_DIST,
-    math.round(f32(player.gun_sprite.height / 2)),
+    math.round(f32(player.gun.sprite.height / 2)),
   }
 
   player.scarf = {
@@ -149,6 +153,8 @@ _default_state :: proc(dt: f32) {
     bullet_pos.y -= PLAYER_GUN_HEIGHT
     bullet_pos += mouse_dir * PLAYER_GUN_DIST
 
+    player.gun.kickback = PLAYER_GUN_KICKBACK
+
     make_bullet(
       pos = bullet_pos,
       vel = mouse_dir * 800,
@@ -212,7 +218,7 @@ _dash_state :: proc(dt: f32) {
 
   player.dash_timer -= dt
 
-  if player.dash_timer <= 0 || phys.get_collisions(player.body) != {} {
+  if player.dash_timer <= 0 || phys.get_collisions(player.body) != nil {
     _exit_dash()
   }
 }
@@ -289,15 +295,18 @@ update_player :: proc(dt: f32) {
   player.sprite.pos = pos
   update_sprite(&player.sprite, dt)
 
-  player.gun_sprite.pos = pos - Vec2{0, PLAYER_GUN_HEIGHT}
 
-  mouse_dir := get_mouse_pos() - player.gun_sprite.pos
-  player.gun_sprite.rotation = math.atan2(
+  mouse_dir := linalg.normalize0(get_mouse_pos() - player.gun.sprite.pos)
+  player.gun.sprite.rotation = math.atan2(
     mouse_dir.y,
     mouse_dir.x,
   ) * math.DEG_PER_RAD
 
-  player.gun_sprite.scale.y = -1 if mouse_dir.x < 0 else 1
+  player.gun.sprite.pos = pos - Vec2{0, PLAYER_GUN_HEIGHT}
+  player.gun.sprite.pos += -mouse_dir * player.gun.kickback
+  player.gun.kickback = dt_lerp(player.gun.kickback, 0, 5)
+
+  player.gun.sprite.scale.y = -1 if mouse_dir.x < 0 else 1
 
   player.dash_cooldown -= dt
   player.jump_buffer -= dt
@@ -321,7 +330,7 @@ draw_player :: proc() {
   draw_tail(player.scarf)
   draw_sprite(player.sprite)
   if player.state != .DASH {
-    draw_sprite(player.gun_sprite)
+    draw_sprite(player.gun.sprite)
   }
 }