Drawing 2D line from character towards mouse but for specific maximum length

Question

I wish to draw weapon attack range indicator from character to mouse but with melee weapons I need to have shorter line length...

Either I would need formula to shorten it to manually defined length or even better calculate length based on bullet speed and lifetime.

Currently using code below.
drawline(hero.position, getlocalmouseposition(), Color(255, 0, 0, 0.5), 3, true)

Answer 1

You can calculate a normal a normal (length 1) Vector2, and multiply it by the wished length. That would give you:

var normalized = (get_local_mouse_position() - hero.position).normalized()
var target = hero.position + normalized * length
drawline(hero.position, length, Color(255, 0, 0, 0.5), 3, true)

For your projectiles, if you have speed in distance/time, lifetime a,d want to calculate distance, just multiply speed with lifetime. You may be off by a constant factor depending on units mismatch, notably if speed is in distance/tick length. Try multiplying/divinding by delta.

Comments

perfect, thank you !

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In line:
drawline(hero.position, length, Color(255, 0, 0, 0.5), 3, true)

There should be "target" instead of "length"