Trying to Graph a sin wave with Node2D

[EpicWilly]

Godot Version

4.2.1

Question

So I am trying to graph a sin wave, however, whenever I run my project the line starts but abruptly cuts off. I have tried increasing the number of points I am using, but it doesn’t seem to affect anything. making the node bigger simply enlarges the whole thing, and does not show more of the line.

Code

extends Line2D


var amplitude = 25
var frequency = .2
var varPoints = 1500

func _draw():
	var step = 2 * 3.141592 / varPoints
	var prev_point = Vector2(0, amplitude * sin(0))

	for i in range(1, varPoints):
		var x = i * step
		var y = amplitude * sin(x * frequency)
		var current_point = Vector2(x, y)
		
		draw_line(prev_point, current_point, Color(1, 1, 1), 2)
		
		prev_point = current_point

[Efi]

You do realize that you’re telling it to only ever draw one cycle, right?

@EpicWilly

var step = 2 * 3.141592 / varPoints

This means the first point is at zero and the last point is at tau, which is a single sine cycle.
If you want more cycles, just multiply by the number of cycles you want. Possibly 1/frequency in your case.

[EpicWilly]

Thanks, I have been scratching my head for a while. I am a bit rusty on the formulas and just looked them up. I thought it was an issue with the node it’s self.