Question

我正在尝试将两个纹理合并为一个第一个纹理来自webcamTexture 第二个来自精灵使用：gameobject.getComponent<SpriteRenderer>().sprite.texture as Texture2D

我在编写函数时遇到了问题，这是我到目前为止所做的：

public static Texture2D CombineTextures(GameObject obj, Texture2D background, Texture2D TodrawLogo)
{
    Vector3 v = obj.transform.position;// obj is TodrawLogo gameobject
    int width = TodrawLogo.width;
    int height = TodrawLogo.height;
    for (int x =(int)v.x; x < width; x++){
        background.SetPixel(x,(int)v.y,TodrawLogo.GetPixel(x,(int)v.y));
    }
    background.Apply();
    return background;
}

这就是我想要做的事情：

WebcamTexture enter image description here

结果纹理应该是这样的 enter image description here

webcamTexture是3dplane，徽标是single sprite 但遗憾的是我的功能不起作用有谁知道如何解决这一问题我知道我应该找到todraw image的确切坐标并设置像素，但我无法弄清楚如何

非常欣赏

编辑：

我尝试使用@nexx代码：

public static Texture2D CombineTexture(Texture2D background, Texture2D TodrawLogo)
{

  int width = TodrawLogo.width;
  int height = TodrawLogo.height;

  int backWidth = background.width;
  int backHeight = background.height;
// bottom right corner
int startX = backWidth - width;
int startY = backHeight - height;

// loop through texture
int y = 0;
while (y < backHeight) {
    int x = 0;
    while (x < backWidth) {
        // set normal pixels
        background.SetPixel(x,y,background.GetPixel(x,y));
        // if we are at bottom right apply logo 
        //TODO also check alpha, if there is no alpha apply it!
        if(x >= startX && y < backHeight- startY)
            background.SetPixel(x,y,TodrawLogo.GetPixel(x-startX,y-startY));
        ++x;
    }
    ++y;
}
background.Apply();
return background;
 }

但这是我得到的结果图像： enter image description here

我被困在这可以有人请告诉我我做错了什么？

Answer 1

这是一个有效的例子。我测试过了！

public Texture2D AddWatermark(Texture2D background, Texture2D watermark)
{

    int startX = 0;
    int startY = background.height - watermark.height;

    for (int x = startX; x < background.width; x++)
    {

        for (int y = startY; y < background.height; y++)
        {
            Color bgColor = background.GetPixel(x, y);
            Color wmColor = watermark.GetPixel(x - startX, y - startY);

            Color final_color = Color.Lerp(bgColor, wmColor, wmColor.a / 1.0f);

            background.SetPixel(x, y, final_color);
        }
    }

    background.Apply();
    return background;
}

Answer 2

我对您的CombineTextures方法进行了一些更改，

public static Texture2D CombineTexture(GameObject obj, Texture2D background, Texture2D TodrawLogo)
{
    int width = TodrawLogo.width;
    int height = TodrawLogo.height;

    int backWidth = background.width;
    int backHeight = background.height;
    // bottom right corner
    int startX = backWidth - width;
    int startY = backHeight - height;

    // loop through texture
    int y = 0;
    while (y < backHeight) {
        int x = 0;
        while (x < backWidth) {
            // set normal pixels
            background.SetPixel(x,y,background.GetPixel(x,y));
            // if we are at bottom right apply logo 
            //TODO also check alpha, if there is no alpha apply it!
            if(x >= startX && y < backHeight- startY)
                background.SetPixel(x,y,TodrawLogo.GetPixel(x-startX,y-startY));
            ++x;
        }
        ++y;
    }
    background.Apply();
    return background;
}

您可以在循环中更改内部的值，以将纹理放置在您想要的位置。

Answer 3

我不知道您希望如何做，但您可以使用Unity的OnGUI方法在需要的地方绘制徽标。

http://docs.unity3d.com/ScriptReference/MonoBehaviour.OnGUI.html

它就像这样简单：

var aTexture : Texture;

function OnGUI() {
    if(!aTexture){
        Debug.LogError("Assign a Texture in the inspector.");
        return;
    }
    GUI.DrawTexture(Rect(10,10,60,60), aTexture, ScaleMode.ScaleToFit, true, 10.0f);
}

我希望我能提供帮助。

Answer 4

试试这个（它是对nexx代码的修改。）它将两个纹理组合成一个新的纹理。新纹理保证可写（否则SetPixel / GetPixel无法工作。）

此外，它假设水印纹理小于背景纹理。

请注意：我没有对此进行测试。

public static Texture2D AddWatermark(Texture2D background, Texture2D watermark)
{
    // Create a new writable texture.
    Texture2D result = new Texture2D(background.width, background.height);

    // Draw watermark at bottom right corner.
    int startX = background.width - watermark.width;
    int startY = background.height - watermark.height;

    for (int x = 0; x < background.width; x++) {
        for (int y = 0; y < background.height; y++) {
            Color bgColor = background.GetPixel(x, y);
            Color wmColor = new Color(0, 0, 0, 0);

            // Change this test if no longer drawing at the bottom right corner.
            if (x >= startX && y >= startY) {
                wmColor = watermark.GetPixel(x, y);
            }

            // Alpha-blend background and watermark color.
            Color bended = bgColor * (1.0f - wmColor.a) + wmColor;
            blended.a = 1.0f;

            result.SetPixel(x, y, blended);
        }
    }

    result.Apply();
    return result;
}

Answer 5

稍微优化的解决方案。仅读写水印所需的区域。

    public static Texture2D AddWatermark(Texture2D background, Texture2D watermark, int startPositionX, int startPositionY)
    {
        //only read and rewrite the area of the watermark
        for (int x = startPositionX; x < background.width; x++)
        {
            for (int y = startPositionY; y < background.height; y++)
            {
                if (x - startPositionX < watermark.width && y - startPositionY < watermark.height)
                {
                    var bgColor = background.GetPixel(x, y);
                    var wmColor = watermark.GetPixel(x - startPositionX, y - startPositionY);

                    var finalColor = Color.Lerp(bgColor, wmColor, wmColor.a / 1.0f);

                    background.SetPixel(x, y, finalColor);
                }
            }
        }

        background.Apply();
        return background;
    }

Answer 6

此代码与两个尺寸不同的图像完美配合

public static Texture2D AddWatermark(Texture2D background, Texture2D watermark, int startX, int startY)
{
    Texture2D newTex = new Texture2D(background.width, background.height, background.format, false);
    for (int x = 0; x < background.width; x++)
    {
        for (int y = 0; y < background.height; y++)
        {
            if (x >= startX && y >= startY && x < watermark.width && y < watermark.height)
            {
                Color bgColor = background.GetPixel(x, y);
                Color wmColor = watermark.GetPixel(x - startX, y - startY);

                Color final_color = Color.Lerp(bgColor, wmColor, wmColor.a / 1.0f);

                newTex.SetPixel(x, y, final_color);
            }
            else
                newTex.SetPixel(x, y, background.GetPixel(x, y));
        }
    }

    newTex.Apply();
    return newTex;
}

在unity3d中将两个不同的纹理合并为一个

6 个答案: