矩阵前乘后乘问题
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 25/100
- Issue type
- Documentation
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- android, java
- Domain
- documentation
Research direction
No project file or test is named. Start with the Android Matrix documentation for preTranslate and preScale, then compare the two orderings in the issue's Java snippet. Done means recording which ordering applies and explaining it with a small, verifiable example.
Written by the indexing model from the issue text.
Description
Matrix m ＝ new Matrix();
m.reset();
m.preTranslate(tx, ty);
m.preScale(sx, sy);
这地方是怎么个顺序
1.是preScale先右乘矩阵 preTranslate再右乘上次的结果。
2.preScale先右乘preTranslate，然后再乘矩阵。
- Dominant language
- Java
- Stars
- 9.3k
- Forks
- 2.1k
- PR merge metrics
- No merged PRs in 30d
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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