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问题：绘画精灵
我要让原型清洁窗户（我的意思是清洗脏的窗户）的统一。
我在寻找这个主题，发现我可以通过Texture2D.SetPixel()更改像素。
我尝试通过这种方法来实现，首先我启用了纹理的读/写并尝试这种方法，但是我的精灵没有发生任何事情。
所以我想问一下，如果有可能改变被鼠标点击的精灵的alpha或触摸来显示原始的精灵的下面的精灵！
我的代码：
private RaycastHit2D hitInfo;
private SpriteRenderer spriteRendererComponent;
private Color zeroAlpha;
// Use this for initialization
void Start()
{
spriteRendererComponent = transform.GetComponent<SpriteRenderer>();
zeroAlpha = Color.blue;
}
// Update is called once per frame
void Update() {
if (Input.GetMouseButton(0))
{
MouseClick();
}
}
public void MouseClick()
{
Vector2 mousePosition = Vector2.zero;
mousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
hitInfo = Physics2D.Raycast(mousePosition, Vector2.zero);
if (hitInfo)
{
spriteRendererComponent.sprite.texture.SetPixel((int)hitInfo.point.x, (int)hitInfo.point.y, zeroAlpha);
spriteRendererComponent.sprite.texture.Apply();
}
}
答：
可以使用this thread雪碧的变化像素
我发现写回信的优化呃关于改变精灵的像素（绘画）
public float radius;
public Color InitialColor;
private RaycastHit2D hitInfo;
// Use this for initialization
void Start()
{
}
// Update is called once per frame
void Update()
{
if (CustomInput.ControlStay())
{
hitInfo = CustomInput.ClickednTouched().hitInfo;
if (hitInfo)
{
UpdateTexture();
}
}
}
public Texture2D CopyTexture2D(Texture2D copiedTexture2D)
{
float differenceX;
float differenceY;
//Create a new Texture2D, which will be the copy
Texture2D texture = new Texture2D(copiedTexture2D.width, copiedTexture2D.height);
//Choose your filtermode and wrapmode
texture.filterMode = FilterMode.Bilinear;
texture.wrapMode = TextureWrapMode.Clamp;
//Center of hit point circle
int m1 = (int)((hitInfo.point.x + 2.5f)/5 * copiedTexture2D.width);
int m2 = (int)((hitInfo.point.y + 2.5f)/5 * copiedTexture2D.height);
for (int x = 0; x < texture.width; x++)
{
for (int y = 0; y < texture.height; y++)
{
differenceX = x - m1;
differenceY = y - m2;
//INSERT YOUR LOGIC HERE
if (differenceX * differenceX + differenceY * differenceY <= radius * radius)
{
//This line of code and if statement, turn all texture pixels within radius to zero alpha
texture.SetPixel(x, y, InitialColor);
}
else
{
//This line of code is REQUIRED. Do NOT delete it. This is what copies the image as it was, without any change
texture.SetPixel(x, y, copiedTexture2D.GetPixel(x, y));
}
}
}
//This finalizes it. If you want to edit it still, do it before you finish with Apply(). Do NOT expect to edit the image after you have applied.
texture.Apply();
return texture;
}
public void UpdateTexture()
{
SpriteRenderer mySpriteRenderer = gameObject.GetComponent<SpriteRenderer>();
Texture2D newTexture2D = CopyTexture2D(mySpriteRenderer.sprite.texture);
//Get the name of the old sprite
string tempName = mySpriteRenderer.sprite.name;
//Create a new sprite
mySpriteRenderer.sprite = Sprite.Create(newTexture2D, mySpriteRenderer.sprite.rect, new Vector2(0.5f, 0.5f));
//Name the sprite, the old name
mySpriteRenderer.sprite.name = tempName;
//Update the material
//If you have multiple sprites, you will want to do this in a loop
//mySpriteRenderer.material.mainTexture = newTexture2D;
//mySpriteRenderer.material.shader = Shader.Find("Unlit/Transparent");
}
另一个问题：在精灵
查找像素：
在Unity3d我们RaycastHit.textureCoord，但它不”在2D中不再存在。我正在寻找这个问题，很多，但我没有找到有用的东西。
所以我想知道这个问题的解决方案，我想知道为什么方法像3D纹理图案不存在于二维。
答：
我又找到答案，你在前面的代码中看到关于精灵寻找像素。
主题：Finding pixel on sprite in Unity