• 2D

  • Make distance_to & draw_line use same units to draw range indicator

Hello there. I am currently building a tower defense game and I am currently a little stuck at drawing a range indicator around the attacker. The plan is to use the following function to draw a circle around the attacker at its max. range of operation. The range is stored in a variable as an integer and also used to calculate the distance between attacker and target:

eg:

var range = 500
if attacker.global_position.distance_to(target.global_position) < range:
        shoot()

Draw function

func draw_circle_arc(center, radius, angle_from, angle_to, color):
	var nb_points = 2048
	var points_arc = PoolVector2Array()

	for i in range(nb_points+1):
		var angle_point = angle_from + i*(angle_to-angle_from)/nb_points - 90
		var point = center + Vector2( cos(deg2rad(angle_point)), sin(deg2rad(angle_point)) ) * radius
		points_arc.push_back( point )

	for indexPoint in range(nb_points):
		draw_line(points_arc[indexPoint], points_arc[indexPoint+1], color, 2)

In my understanding the range should be the radius of the circle but however the circle is way to big when given the range as the radius.

Imgur

This is what I want to achieve. The circle is located right where the attacker starts shooting the targets. But in this case I had to divide the range by 5 to get this result. Otherwise it would be way to big. So my question is: How can I manage to use the same distance/range variable for both checking the shooting range and drawing the range indicator? Aren't both using pixel measurements?

Thanks in advance!

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Is the CanvasItem you're drawing the line on being scaled, or inheriting scale from a parent?

@duane said: Is the CanvasItem you're drawing the line on being scaled, or inheriting scale from a parent?

I didn't think that I transformed something but I checked and actually the scale value was set to 500 which completely explains why I have to divide the range by 5 in my case to make it fit. I changed the scaling and adjusted everything accordingly. Now it works like a charm! Thanks! I just wonder when the scaling happend, something I will probably never find out :#