how do i calculate the angle to fire a bullet to intercect

Questions & Answers
1

i have been doing a tower defence game. and came accross a problem that i can not solve

in 2d terms
i have a enemy at 0,0 moving eastwards at 20 miles per hour

the tower is south of the enemy by 30 miles and the bullet travels at 90 miles per hour.

i need to figure out what angle or vector i need the tower to be facing for the bullet to hit the target .

i have been told that i might need to use quadratic equations , but i still cant figure it out . is there any good links on how to do the calculations

2

If you look, tower defense games don’t lead targets. Bullets go fast enough and are wide enough they don’t need to lead, or they are guided.

But, a very cheap way to do it is to find flightTime=targDist/bulletSpeed. Then lead the target by that much: aimPos=targPos+targMovePerSec*flightTime. That’s not quite right, since time to the new target is different, but close enough most of the time.