c# - Error upon spawning multiple boundingBoxes "System.ArgumentOutOfRangeException" -

c# - Error upon spawning multiple boundingBoxes "System.ArgumentOutOfRangeException" -

i'm trying create boundingboxes (collision) between enemy , bullets it's struck with. unfortunately, i'm beingness presented error system.argumentoutofrangeexception every time enemy leaves screen, or more 1 bullet spawned @ time.

both bounding boxes created in update functions of bullet & enemy classes such:

boundingbox = new rectangle((int)position.x, (int)position.y, texture.width, texture.height);

this relevant code beingness used in game1 update function:

for (int = bullets.count - 1; >= 0; i--) { bullets[i].update(gametime); error occurs here -> if (bullets[i].boundingbox.intersects(enemies[i].boundingbox)) { score += 1; bullets.removeat(i); } //bullets beingness destroyed upon leaving if (bullets[i].position.y < 0) bullets.removeat(i); }

any help appreciated.

also, here how implemented bullet list game1 class if helps @ all?:

list<bullet> bullets = new list<bullet>(); public void shoot (vector2 pos, vector2 dir, float speed) { bullet bullet = new bullet(bullettexture); bullet.position = pos; bullet.direction = dir; bullet.speed = speed; if (bullets.count() < 40) //maximum amount of bullets bullets.add(bullet); }

if have guess, error comes if (bullets[i].boundingbox.intersects(enemies[i].boundingbox)) statement.

basically, have same amount of enemies , bullets time? if not, fail whenever numbers different.

why this? well, using 2 different collections, bullets , enemies, , taking element @ position i.

so if have 5 bullets 1 enemy in collection, first iteration of have i = 4, position not exist in enemies collection (it has enemies[0] position).

one way solve problem be:

foreach (enemy in enemies) foreach (bullet in bullets) if (bullet.boundingbox.intersects(enemy.boundingbox)) { // logic here. }

you go through every enemy, , each 1 check if bullet intersecting it. not best solution performance wise, think it's start.

c# monogame