在改造具体坐标位图或ImageView的 [英] Transform Bitmap or ImageView at specific coordinates

问题描述

我试图通过拖动点，具体坐标例这种转变位图和ImageView的正在起草的应用程序。这是使它的最好方法？我应该使用OpenGL？谢谢

I am trying to transform bitmap and imageview by dragging points to specific coordinates Example this is drawing app. Which is the best way to make it ? Should i use OpenGL ? Thank You

编辑：我用canvas.drawBitmapMesh固定感谢大家的帮助，我真的AP preciate它

I fixed by using canvas.drawBitmapMesh thank you all for your help i really appreciate it .

推荐答案

您可以尝试创建第二可变位像这样

You can try creating second mutable bitmap like this

Bitmap originalBitmap;
Bitmap b = Bitmap.createBitmap(originalBitmap.getWidth(), originalBitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b)

然后你可以借鉴的新位图转换申请前原有的位图。请参见帆布 API的更多细节。

例如使用下面的方法：

c.drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint)

更新

关于使用矩阵，它只是一个猜测，你可以尝试的方法mapPoints（浮动[] SRC，浮动[] DEST）。我还做了谷歌快速搜索，发现网页面举例。一看。

Regarding use of Matrix, it's just a guess, you can try method mapPoints(float[] src, float[] dest). I also did a quick search on Google and found web page with examples. Have a look.

更新2

Dardan才实现他与下面的方法目标：

Dardan was able to achieve his goal with the following method:

drawBitmapMesh(Bitmap bitmap, int meshWidth, int meshHeight, float[] verts, int vertOffset, int[] colors, int colorOffset, Paint paint);

方法说明：

通过网格，网格的地方顶点均匀地绘制位图
  跨位分布。跨有meshWidth + 1个顶点，
  和meshHeight + 1个顶点了。在绿党数组访问中
  行优先顺序，使得第一meshWidth + 1顶点
  跨越位图的顶部分布从左到右。更
  这种方法的一般版本是drawVertices（）。

Draw the bitmap through the mesh, where mesh vertices are evenly distributed across the bitmap. There are meshWidth+1 vertices across, and meshHeight+1 vertices down. The verts array is accessed in row-major order, so that the first meshWidth+1 vertices are distributed across the top of the bitmap from left to right. A more general version of this method is drawVertices().

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