82 lines
3.9 KiB
Plaintext
82 lines
3.9 KiB
Plaintext
fn is_alive(event) {
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for unit in event.entities {
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if unit.entity == event.entity && unit.health > 0 { return true; }
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}
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false
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}
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// State is shared by a script, so each staged or simultaneous boss has its own
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// patrol direction, charge timer and alternating attack cursor.
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fn on_spawn(event, state, random) {
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if state.contains("last_death") && state.last_death == event.entity { state.remove("last_death"); }
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if !is_alive(event) { return #{ commands: [], state: state }; }
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if !state.contains("units") { state.units = #{}; }
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state.units[event.entity.to_string()] = #{direction: 1, age: 0, volley: 0};
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#{ commands: [#{ op: "velocity", entity: event.entity, vx: 0, vy: 2 }], state: state }
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}
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fn on_tick(event, state, random) {
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if event.health <= 0 || !is_alive(event) { return #{ commands: [], state: state }; }
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let key = event.entity.to_string();
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if !state.contains("units") { state.units = #{}; }
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let cursor = if state.units.contains(key) {
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state.units[key]
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} else { #{direction: 1, age: 0, volley: 0} };
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if event.y < 24 {
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state.units[key] = cursor;
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return #{ commands: [#{ op: "velocity", entity: event.entity, vx: 0, vy: 2 }], state: state };
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}
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if event.x >= 144 { cursor.direction = -1; }
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if event.x <= 80 { cursor.direction = 1; }
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cursor.age += 1;
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let commands = [
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#{ op: "move", entity: event.entity, x: event.x, y: 24 },
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#{ op: "velocity", entity: event.entity, vx: cursor.direction, vy: 0 }
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];
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// Nine simulation ticks (0.386 seconds) of audible warning precede each
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// volley. Charging does not create an explosion in front of the aircraft.
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if cursor.age % 54 == 45 {
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commands.push(#{ op: "play_sound", sound: "iron_coast_boss_6:warning" });
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}
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if cursor.age % 54 == 0 {
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if cursor.volley % 2 == 0 {
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commands.push(#{ op: "projectile", weapon: "iron_coast_boss_6:projectile", x: event.x + 28, y: event.y + 60, vx: -2, vy: 4, hostile: true });
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commands.push(#{ op: "projectile", weapon: "iron_coast_boss_6:projectile", x: event.x + 48, y: event.y + 60, vx: 0, vy: 4, hostile: true });
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commands.push(#{ op: "projectile", weapon: "iron_coast_boss_6:projectile", x: event.x + 68, y: event.y + 60, vx: 2, vy: 4, hostile: true });
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} else {
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commands.push(#{ op: "projectile", weapon: "iron_coast_boss_6:projectile", x: event.x + 28, y: event.y + 60, vx: 0, vy: 4, hostile: true });
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commands.push(#{ op: "projectile", weapon: "iron_coast_boss_6:projectile", x: event.x + 68, y: event.y + 60, vx: 0, vy: 4, hostile: true });
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}
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commands.push(#{ op: "play_sound", sound: "iron_coast_boss_6:shot" });
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cursor.volley += 1;
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}
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state.units[key] = cursor;
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#{ commands: commands, state: state }
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}
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fn on_hit(event, state, random) {
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state.hits = if state.contains("hits") { state.hits + 1 } else { 1 };
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#{ commands: [], state: state }
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}
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fn on_death(event, state, random) {
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let key = event.entity.to_string();
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// Retired entities cannot fire. Preserve other live bosses' cursors, and
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// still count an aircraft destroyed before its queued spawn hook runs.
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if state.contains("last_death") && state.last_death == event.entity {
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return #{ commands: [], state: state };
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}
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state.last_death = event.entity;
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if state.contains("units") { state.units.remove(key); }
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state.destroyed = if state.contains("destroyed") { state.destroyed + 1 } else { 1 };
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let defeated = if event.objectives.contains("iron_coast_boss_6:defeated") {
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event.objectives["iron_coast_boss_6:defeated"] + 1
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} else { 1 };
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#{ commands: [
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#{ op: "objective", key: "iron_coast_boss_6:defeated", value: defeated },
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#{ op: "effect", x: event.x + 28, y: event.y + 44 },
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#{ op: "effect", x: event.x + 68, y: event.y + 44 },
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#{ op: "play_sound", sound: "iron_coast_boss_6:death" }
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], state: state }
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}
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