142 : If goal
Balthazar:
If you run the code now, the game will stop when you reach the third level. This is because we have code that assumes that each level has a 'goal' object. Since this is no longer the case, it will throw an exception (error) and stop when you get to a level without a goal (level 3 in our case).
Balthazar:
We can fix this by making the code work by having the draw_goal() and check_goal_collisions() functions check to make sure it has a valid goal object before trying to draw it.
function draw_goal(ctx) {
var level = _levels[_game.current_level];
var goal = level.goal;
if (goal) {
var image = goal.img_closed;
if (level.player_has_key) {
image = goal.img_open;
}
set_transform(ctx, goal);
ctx.drawImage(image, 0, 0);
reset_transform(ctx);
}
}
if (goal) {
var image = goal.img_closed;
if (level.player_has_key) {
image = goal.img_open;
}
set_transform(ctx, goal);
ctx.drawImage(image, 0, 0);
reset_transform(ctx);
}
}
function check_goal_collisions() {
var level = _levels[_game.current_level];
var goal = level.goal;
if (goal) {
if (collide(goal, _player) && level.player_has_key) {
start_level(goal.next_level);
}
}
}
if (goal) {
if (collide(goal, _player) && level.player_has_key) {
start_level(goal.next_level);
}
}
}