Forums » Help » line of sight?

Hi all,

I was wondering if anyone has come up with a reasonably well working implementation of a line of sight algorithm?

I thought I could implement this quickly with ig.game.collisionMap.trace() but since this only takes the collision map into account but not entities (i.e. doors) this is not the same.

Thanks in advance
Dominique

I dont suppose you could share any code you may have that worked? I'm looking to do the same kinda thing. :)

Quote from Hareesun
I dont suppose you could share any code you may have that worked? I'm looking to do the same kinda thing. :)

do you need an entity check?

i have made it with the trace statement:

		// Get the x and y distance to the player
		var xd = (ig.game.player.pos.x + ig.game.player.size.x / 2) - (this.pos.x + this.size.x / 2);
		var yd = (ig.game.player.pos.y + ig.game.player.size.y / 2) - (this.pos.y + this.size.y / 2);

		// Calculate the distance
		this.distanceToPlayer = Math.sqrt(xd * xd + yd * yd);

		// Check if the enemy has a line of sight to the player
		// I working with a lot of entities, because of that i check how far away the entity is
		if (this.distanceToPlayer < 500) {
			var tr = ig.game.collisionMap.trace(this.pos.x + this.size.x / 2, this.pos.y + this.size.y / 2, xd, yd, 1, 1);

			if (!tr.collision.x && !tr.collision.y) {
				ig.log('I SEE YOU!!!!');
			}
		}