1 files changed, 64 insertions, 0 deletions
diff --git a/ai.lua b/ai.lua
new file mode 100644
index 0000000..af1a807
--- /dev/null
+++ b/ai.lua
@@ -0,0 +1,64 @@
+AiController = {}
+AiController.__index = AiController
+
+function AiController:new(controlling)
+    return setmetatable({
+        controlling = controlling,
+        time = 0
+    }, AiController)
+end
+
+function AiController:follow(target)
+    self.target = target
+end
+
+function AiController:update(dt)
+    if self.target ~= nil and not self.target.knockback then
+        diff = self.target.position - self.controlling.position
+        self.controlling.velocity = diff:normal() * 20
+        self.controlling:transition_to(States.Walk)
+    end
+    self.time += dt
+    if self.time >= 5 then
+        self:shoot()
+        self.time = 0
+    end
+end
+
+function gliding_gun()
+    _glider_damage = { amount = 2, knockback = { magnitude = 300, time = 0.080 } }
+    GlidingGunBuilder = EntityBuilder:new(World)
+    function GlidingGunBuilder:transition_state()
+    end
+    return GlidingGunBuilder:b_type(Entities.Bullet)
+        :b_line_of_sight(vec2(1, 0))
+        :b_position(vec2(100, 100))
+        :b_render_order(0)
+        :b_collidable()
+        :b_live_for(25)
+        :b_velocity(vec2(-40, 0))
+        :b_collision_bounds(vec2(3, 4), vec2(5, 6))
+        :b_add_state(
+            States.Active, {
+                animation = {
+                    pos_y = { sequence = { 75, 76, 77, 78 }, dt = 0.10 },
+                    neg_y = { sequence = { 75, 76, 77, 78 }, dt = 0.10, reflect = vec2(true, true) },
+                    pos_x = { sequence = { 75, 76, 77, 78 }, dt = 0.10 },
+                    neg_x = { sequence = { 75, 76, 77, 78 }, dt = 0.10, reflect = vec2(true, true) }
+                }
+            }
+        )
+        :b_state(States.Active)
+        :build()
+end
+
+function AiController:shoot()
+    diff = (self.target.position - self.controlling.position):normal() * 50
+    a, b, c = gliding_gun(), gliding_gun(), gliding_gun()
+    a.position = vec2(self.controlling.position)
+    a.velocity = diff:clockwise_rotate(-0.05)
+    b.position = vec2(self.controlling.position)
+    b.velocity = diff:clockwise_rotate(0.05)
+    c.position = vec2(self.controlling.position)
+    c.velocity = diff
+end