42 lines
1.2 KiB
C#
42 lines
1.2 KiB
C#
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using UnityEngine;
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namespace cylvester
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{
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interface ISpectrumGenerator
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{
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Texture2D Spectrum { get; }
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void Update(ref Rect selectionRect);
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}
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public class SpectrumGenerator : ISpectrumGenerator
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{
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private Texture2D texture_;
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private readonly int height_;
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public Texture2D Spectrum => texture_;
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public SpectrumGenerator(int width, int height)
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{
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texture_ = new Texture2D(width, height);
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height_ = height;
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}
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public void Update(ref Rect selectionRect)
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{
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for (var y = 0; y < texture_.height; y++)
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{
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for (var x = 0; x < texture_.width; x++)
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{
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var alpha = 0.4f;
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if ((selectionRect.x < x && x < (selectionRect.x + selectionRect.width)) &&
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(selectionRect.y < y && y < (selectionRect.y + selectionRect.height)))
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{
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alpha = 1f;
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}
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var color = new Color(Random.value, Random.value, Random.value, alpha);
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texture_.SetPixel(x, height_-y, color);
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}
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}
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texture_.Apply();
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}
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}
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}
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