用标准颜色表示方式为 Unity3D 改变颜色

搞定 material 的颜色不容易，

Color(r,g,b,a) 接受的是 0-1 的 float 值， 用 color.r += 0.1f 来形成渐变， 一直没达到目的

查到 Color32(r,g,b,a) 可以用 0-255 的 BYTE 值来表达， 比较符合惯常用法 

using UnityEngine;
using System.Collections;

public class ouyColorGamma : MonoBehaviour
{
    private Renderer render;

    private Color32 color = new Color32(122, 1, 1, 1);
    void Start()
    {
        Example ();
        render = GetComponent<Renderer>();
        render.material.color = color;
    }
    void Example ()
    {
        //print (color.gamma);
        print (" r:" +color.r + " g:" +color.g + " b:"+color.b);
    }
}

下面例程可以通过键盘 r, g, b, a 实现渐变色

using UnityEngine;
using System.Collections;

public class ouyChangeCubeColor32 : MonoBehaviour {

    private Color32 altColor;
    private Renderer rend; 
    
    //I do not know why you need this?
    void Example() {         
        altColor.g = 0;         
        altColor.r = 0;        
        altColor.b = 0;         
        altColor.a = 255;     
    }      
    
    void Start ()
    {       
        //Call Example to set all color values to zero.
        Example();
        //Get the renderer of the object so we can access the color
        rend = GetComponent<Renderer>();
        //Set the initial color (0f,0f,0f,0f)
        rend.material.color = altColor;
    }      
    
    void Update() 
    {
        if (Input.GetKeyDown (KeyCode.G)){  
            //Alter the color          
            altColor.g += 1;
            if(altColor.g > 255)
                altColor.g = 0;
            
            //Assign the changed color to the material.
            rend.material.color = altColor;
        }
        if (Input.GetKeyDown (KeyCode.R)){  
            //Alter the color           
            altColor.r += 1;
            Debug.Log("Color.r = "+ altColor.r);
            if(altColor.r > 255)
            {
                
                altColor.r = 0;
            }
            //Assign the changed color to the material. 
            rend.material.color = altColor;
        }
        if (Input.GetKeyDown (KeyCode.B)){  
            //Alter the color            
            altColor.b += 1;
            if(altColor.b > 255)
                altColor.b = 0;
            //Assign the changed color to the material. 
            rend.material.color = altColor;
        }
        if (Input.GetKeyDown (KeyCode.A)){ 
            //Alter the color          
            altColor.a += 1;
            if(altColor.a > 255)
                altColor.a = 0;
            //Assign the changed color to the material. 
            rend.material.color = altColor;
        }
    } 
}

 

以下参考 《unity3d_颜色转换器》 实现 16进制转为  byte : rgb 

using UnityEngine;
using System.Collections;

/**
 * <summary>
 * <para>作者：巨星电艺</para> 
 * <para>编写日期：巨星电艺</para>
 **/
public class ouyChangObjColor : MonoBehaviour
{
    private float weight = 0f;
    // Use this for initialization
    void Start ()
    {

        Color c = HexToColor ("66ccff");
        transform.GetComponent<MeshRenderer>().material.color = HexToColor ("ffcc00");// new Color(0, 0,1,1);
    }
    
    // Update is called once per frame
    void Update ()
    {
        if (Input.GetKeyDown (KeyCode.F2)) {
            //Application.LoadLevel(0);
            // weight = Random.Range(0, 100);
            weight += 0.10f;
            if(weight > 1)
                weight = 0;
            transform.GetComponent<MeshRenderer>().material.color = new Color(weight, 1,0,1);

            Debug.LogFormat("Color = {0}", weight);
        }
    }

    public static Color HexToColor(string hex)
    {
        byte r = byte.Parse (hex.Substring (0, 2), System.Globalization.NumberStyles.HexNumber);
        byte g = byte.Parse (hex.Substring (2, 2), System.Globalization.NumberStyles.HexNumber);
        byte b = byte.Parse (hex.Substring (4, 2), System.Globalization.NumberStyles.HexNumber);
        return new Color32(r,g,b,255);
    }
}