Vector Demo 3

This demo has a runtime error that happens in a loop on line 281 of file VectorDemo3.dm:

Line 281: "for(h in ourshape.hull)" of check collision proc:

"[code]proc/check_collision()

// check ship-sun collision
// note this is simple check if ship is too close to sun
if(pos.Magnitude2() < 576) // 24**2
explode(1)
del(src)

// check ship-ship collision
// will check to see if any of our ship's vertices are inside the other ship
// note this is not sufficient to test for collision, but other ship will also
// test the same thing against us, which is sufficient

var/mob/ship/S

for(S in orange(1,src)) // look within 1 tile for ship objects
break

if(!S) // no other ship in range, so end
return

var/vector/h
var/vector/offset = pos.SubVector(S.pos)

// this is the shape of the other ship (on it's current heading)
var/shape/othershape = S.shapes[S.heading_state]
// this is the shape of our ship
var/shape/ourshape = shapes[heading_state]

var/hit = FALSE

// check each of our hull vertices
// see if they lie inside the hull shape of the other ship
for(h in ourshape.hull)
h = h.AddVector(offset)
if(othershape.pointInShape(h))
hit = TRUE
break

if(hit) // we found a collision, blow up both ships
explode()
S.explode()
del(S)
del(src)[/code]"

Checking out this demo for potential ideas in a space game.