PUIExampleSineWaves.cs

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using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
namespace PrimitiveUI.Examples;
 
public class PUIExampleSineWaves : MonoBehaviour
{
    public PrimitiveCanvas primitiveCanvas;
 
    public Slider sliderPeriod;
 
    public Slider sliderAmplitude;
 
    public Slider sliderFrequency;
 
    public Color bgLinesColor;
 
    public Color centerLinesColor;
 
    public int numBgLinesHorizontal;
 
    public float sampleSize = 0.01f;
 
    private StrokeStyle sinStrokeStyle;
 
    private StrokeStyle bgLinesStrokeStyle;
 
    private StrokeStyle centerLinesStrokeStyle;
 
    private float lastSineProgress;
 
    private void Start()
    {
        sliderPeriod.onValueChanged.AddListener(delegate
        {
            Draw();
        });
        sliderAmplitude.onValueChanged.AddListener(delegate
        {
            Draw();
        });
        sliderFrequency.onValueChanged.AddListener(delegate
        {
            Draw();
        });
        sinStrokeStyle = new StrokeStyle(Color.white, 0.025f, StrokeScaleMode.Relative);
        bgLinesStrokeStyle = new StrokeStyle(bgLinesColor, 0.004f, StrokeScaleMode.Relative);
        centerLinesStrokeStyle = new StrokeStyle(centerLinesColor, 0.01f, StrokeScaleMode.Relative);
    }
 
    private void Update()
    {
        Draw();
    }
 
    private void Draw()
    {
        primitiveCanvas.Clear();
        float num = bgLinesStrokeStyle.thickness * (float)numBgLinesHorizontal;
        float num2 = (1f - num) / (float)(numBgLinesHorizontal - 1);
        float num3 = bgLinesStrokeStyle.thickness / 2f * (float)(numBgLinesHorizontal - 1);
        for (int i = 0; i < numBgLinesHorizontal; i++)
        {
            float x = num3 + (float)i * num2;
            primitiveCanvas.DrawLine(new Vector2(x, 0f), new Vector2(x, 1f), bgLinesStrokeStyle);
        }
        float num4 = bgLinesStrokeStyle.thickness * primitiveCanvas.aspectRatio;
        num2 *= primitiveCanvas.aspectRatio;
        int num5 = Mathf.CeilToInt(1f / (num4 + num2));
        num3 = num4 / 2f * (float)(num5 - 1);
        for (int j = 0; j < num5; j++)
        {
            float y = num3 + (float)j * num2;
            primitiveCanvas.DrawLine(new Vector2(0f, y), new Vector2(1f, y), bgLinesStrokeStyle);
        }
        primitiveCanvas.DrawLine(new Vector2(0.5f, 0f), new Vector2(0.5f, 1f), centerLinesStrokeStyle);
        primitiveCanvas.DrawLine(new Vector2(0f, 0.5f), new Vector2(1f, 0.5f), centerLinesStrokeStyle);
        float num6 = 0.05f;
        List<Vector2> list = new List<Vector2>();
        for (float num7 = 0f - num6; num7 < 1f + num6; num7 += sampleSize)
        {
            float y2 = Mathf.Sin(MathF.PI * 2f / sliderPeriod.value * num7 * MathF.PI + lastSineProgress) * sliderAmplitude.value / 2f + 0.5f;
            list.Add(new Vector2(num7, y2));
        }
        primitiveCanvas.DrawPath(list.ToArray(), sinStrokeStyle, closePath: false);
        lastSineProgress += Time.deltaTime * sliderFrequency.value;
    }
}