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game.Spider = (spec) => {
const object = game.Object(spec);
const parentUpdate = object.update;
object.randomizeVel = () => {
object.dx = Math.min(Math.random(), 0.25 + 0.05*game.level) * (Math.random() > 0.5 ? 1 : -1);
object.dy = Math.min(Math.random(), 0.25 + 0.05*game.level) * (Math.random() > 0.5 ? 1 : -1);
}
object.update = (elapsedTime) => {
if (Math.random() < 0.01*game.level) {
object.randomizeVel();
}
if (object.x < 0 || object.x > game.width - object.width) {
object.dx = -object.dx;
}
if (object.y < 0 || object.y > game.height - object.height) {
object.dy = -object.dy;
}
object.x = Math.max(0, Math.min(game.width - object.width, object.x));
object.y = Math.max(0, Math.min(game.height - object.height, object.y));
parentUpdate(elapsedTime);
};
object.explode = () => {
game.explosions.push(game.Explosion({x: object.x, y: object.y, width: object.width, height: object.height, sprite: game.sprites.explosionBig}));
game.sounds.enemy_hit.load();
game.sounds.enemy_hit.play();
}
object.onBulletCollision = (bullet) => {
game.score += 150;
object.alive = false;
object.explode();
}
object.onPlayerCollision = (player) => {
object.alive = false;
player.kill();
object.explode();
}
return object;
}
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