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@boj
Created August 30, 2011 17:39
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Unity3d Color Picker
using UnityEngine;
using System.Collections;
// relies on: http://forum.unity3d.com/threads/12031-create-random-colors?p=84625&viewfull=1#post84625
public class ColorPicker : MonoBehaviour {
public bool useDefinedPosition = false;
public int positionLeft = 0;
public int positionTop = 0;
// the solid texture which everything is compared against
public Texture2D colorPicker;
// the picker being displayed
private Texture2D displayPicker;
// the color that has been chosen
public Color setColor;
private Color lastSetColor;
public bool useDefinedSize = false;
public int textureWidth = 360;
public int textureHeight = 120;
private float saturationSlider = 0.0F;
private Texture2D saturationTexture;
private Texture2D styleTexture;
public bool showPicker = false;
void Awake() {
if (!useDefinedPosition) {
positionLeft = (Screen.width / 2) - (textureWidth / 2);
positionTop = (Screen.height / 2) - (textureHeight / 2);
}
// if a default color picker texture hasn't been assigned, make one dynamically
if (!colorPicker) {
colorPicker = new Texture2D(textureWidth, textureHeight, TextureFormat.ARGB32, false);
ColorHSV hsvColor;
for (int i = 0; i < textureWidth; i++) {
for (int j = 0; j < textureHeight; j++) {
hsvColor = new ColorHSV((float)i, (1.0f / j) * textureHeight, 1.0f);
colorPicker.SetPixel(i, j, hsvColor.ToColor());
}
}
}
colorPicker.Apply();
displayPicker = colorPicker;
if (!useDefinedSize) {
textureWidth = colorPicker.width;
textureHeight = colorPicker.height;
}
float v = 0.0F;
float diff = 1.0f / textureHeight;
saturationTexture = new Texture2D(20, textureHeight);
for (int i = 0; i < saturationTexture.width; i++) {
for (int j = 0; j < saturationTexture.height; j++) {
saturationTexture.SetPixel(i, j, new Color(v, v, v));
v += diff;
}
v = 0.0F;
}
saturationTexture.Apply();
// small color picker box texture
styleTexture = new Texture2D(1, 1);
styleTexture.SetPixel(0, 0, setColor);
}
void OnGUI(){
if (!showPicker) return;
GUI.Box(new Rect(positionLeft - 3, positionTop - 3, textureWidth + 60, textureHeight + 60), "");
if (GUI.RepeatButton(new Rect(positionLeft, positionTop, textureWidth, textureHeight), displayPicker)) {
int a = (int)Input.mousePosition.x;
int b = Screen.height - (int)Input.mousePosition.y;
setColor = displayPicker.GetPixel(a - positionLeft, -(b - positionTop));
lastSetColor = setColor;
}
saturationSlider = GUI.VerticalSlider(new Rect(positionLeft + textureWidth + 3, positionTop, 10, textureHeight), saturationSlider, 1, -1);
setColor = lastSetColor + new Color(saturationSlider, saturationSlider, saturationSlider);
GUI.Box(new Rect(positionLeft + textureWidth + 20, positionTop, 20, textureHeight), saturationTexture);
if (GUI.Button(new Rect(positionLeft + textureWidth - 60, positionTop + textureHeight + 10, 60, 25), "Apply")) {
setColor = styleTexture.GetPixel(0, 0);
// hide picker
showPicker = false;
}
// color display
GUIStyle style = new GUIStyle();
styleTexture.SetPixel(0, 0, setColor);
styleTexture.Apply();
style.normal.background = styleTexture;
GUI.Box(new Rect(positionLeft + textureWidth + 10, positionTop + textureHeight + 10, 30, 30), new GUIContent(""), style);
}
}
@ALanMAttano
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ALanMAttano commented Apr 28, 2016

Nico, Look the wonderful ColorHSV script made by MatthewW here:
http://forum.unity3d.com/threads/create-random-colors.12031/#post-84625

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