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Bug 28333 - Show on example how a,b,c,d,e,f affect the point position
Summary: Show on example how a,b,c,d,e,f affect the point position
Status: RESOLVED MOVED
Alias: None
Product: WHATWG
Classification: Unclassified
Component: HTML (show other bugs)
Version: unspecified
Hardware: Other All
: P3 normal
Target Milestone: Unsorted
Assignee: Ian 'Hixie' Hickson
QA Contact: contributor
URL: https://html.spec.whatwg.org/#transfo...
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-03-25 13:10 UTC by contributor
Modified: 2019-03-29 20:22 UTC (History)
3 users (show)

See Also:

Attachments

Description contributor 2015-03-25 13:10:56 UTC 
Specification: https://html.spec.whatwg.org/multipage/scripting.html
Multipage: https://html.spec.whatwg.org/multipage/#transformations
Complete: https://html.spec.whatwg.org/#transformations
Referrer: https://html.spec.whatwg.org/multipage/the-canvas-element.html

Comment:
Show on example how a,b,c,d,e,f affect the point position

In the paragraph about transform(a,b,c,d,e,f) readers could benefit from
something like:
onScreenX = a*inputX+c*inputY+e  
(or whatever the real formula is). 
I am a major of C.S. but I still have problems when the matrix is square, to
tell if we want to multiply from the left or from the right, and if the input
vector should be horizontal or vertical etc.
Matrices are complicated concept anyway, so example or formula could help.

Posted from: 78.8.147.90
User agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.89 Safari/537.36
Comment 1 Domenic Denicola 2019-03-29 20:22:32 UTC 
https://github.com/whatwg/html/pull/4473