Android的帆布规模，翻译和并主张 [英] Android canvas scale, translate and positing

问题描述

我试图用帆布规模放大之后，在移动限制，但新坐标不匹配。结果
我宽度480，1.5F后缩放我的宽度为720 ...但是当我设置转化为-480，我看到右边更大的空间。

I'm trying the moving limit after zoom with canvas scale, but new coordinates does not match.
my width 480, after 1.5f zooming my width will be 720... but when I set translate to -480, I'm seeing more space on the right.

float zoom = 0.5f;
PointF translate = new PointF(0, 0);
canvas.scale(zoom, zoom);
canvas.translate(translate.x, translate.y);
//...
canvas.drawRect(0, 0, width, height, paint);

对不起我的英语不好和解释，但我想问问在总结;结果
什么是真正的宽/高限缩放移动画布后翻译？

sorry my bad English and explanation, but I want to ask in summary;
what is the true width/height limit for translate after zooming for moving the canvas?

推荐答案

我解决了这个问题如下：

I solved this problem as follows;

（屏幕分辨率：800×480 [横向]）

(screen resolution: 800x480 [landscape])

int screenWidth = 800;
int gameLimitX = 1600;
int cameraPositionX = 0;

float zoom = 1.0;

if((screenWidth / zoom) + cameraPositionX > gameLimitX) {
    cameraPositionX = (screenWidth / zoom) + cameraPositionX;
}

（对于Y /身高做同样的）结果
我希望你能理解。

(do same for y/height)
I hope you can understand.

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