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View Code? Open in Web Editor NEW《HenCoder Android 开发进阶：UI 1-4 Canvas 对绘制的辅助》 的练习项目
Home Page: http://hencoder.com/ui-1-4
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提示
我能说凯哥越来越懒了吗?现在都不给提示0.0
这期的练习咋没有题目...
为啥一上来就是代码...
题目 （注释） 咋不见了- -
难道是朱老师太忙了吗？
Camera.rotateX/Y()修正版
Camera.rotateX/Y()修正版
如果图形没有绘制在Canvase中心，
修正后图形也不是对称的（即使我换成了一张正方形的图片）
请问 Canvas.setMatrix() 相比于 Canvas.concat() 会出现什么显示问题 ?
做练习做到 有关矩阵的部分的时候，突然想起朱老师将 Sample 中 Canvas.setMatrix() 改为了 Canvas.concat() 。
这里我不是很理解 ， Canvas.concat() 会对显示造成什么问题？
讲道理，set 不应该比 concat 更好吗- -？
为啥 set 还会出现问题，而 concat 反而可以高枕无忧 ？
下面附上 朱老师的提交 记录
commit 00101aa31b9802e33e01697a133d8036a8a2726d
Author: Kai Zhu <[email protected]>
Date: Tue Aug 8 11:35:38 2017 +0800
把 Canvas.setMatrix() 改为 Canvas.concat()，避免有些机型中出现的显示问题。
.../hencoderpracticedraw4/sample/Sample07MatrixTranslateView.java | 4 ++--
.../hencoderpracticedraw4/sample/Sample08MatrixScaleView.java | 4 ++--
.../hencoderpracticedraw4/sample/Sample09MatrixRotateView.java | 4 ++--
.../hencoder/hencoderpracticedraw4/sample/Sample10MatrixSkewView.java | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)
setDegree()???
setDegree()从何而来，如何回调来的
Camera.rotateX/Y()修正版
Camera.rotateX/Y()修正版的效果明显不对呀（虽然代码我没看出毛病）
修正后图形应该是对称的，但是出来的效果明显没有对称呀
糊脸修正中对虚拟摄像机位置的修正为什么要使用- displayMetrics.density * 6;？？？
糊臉修正的Sample也沒有修正
如題，糊臉修正上和下是一樣的～
看了代碼，Sample那裡有準備Z的量，但在onDraw沒有使用
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