rrad | Real , Random Address Data | Runtime Evironment library
kandi X-RAY | rrad Summary
kandi X-RAY | rrad Summary
This is a list of real, random addresses that geocode successfully (tested on Google's Geocoding API service). The address data comes from the OpenAddresses project, and all the addresses are in the public domain. The addresses are deliberately not linked to people or businesses; the only guarantee is that they are real addresses that geocode successfully. The addresses were pulled from OpenAddress where the "Required attribute" field was present and not "Yes". See "Attribution" below for a list of sources (also included in each data file).
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QUESTION
I am trying to come up with a way to rotate an image in perspective around the Y axis via CSS so that the final visible width equals a desired number of pixels.
For example, I might want to rotate a 300px
image so that, after rotation and perspective is applied, the width of the image is now 240px
(80% of original). By trial and error I know I can set transform: perspective(300) rotateY(-12.68)
and it puts the top left point at -240px
(this is using the right side of the image as the origin)
I can't quite figure out how to reverse engineer this so that for any given image width, perspective and desired width I can calculate the necessary rotation.
Eg. For the same 300px
image, I now want it to be a width of 150px
after rotation - what is the calculation required to get the necessary angle?
Here's a playground to give you an idea of what I'm looking for, I've replicated the math done by the perspective and rotation transforms to calculate the final position of the left-most point, but I haven't been able to figure out how to solve for the angle given the matrix math and multiple steps involved.
...ANSWER
Answered 2019-Aug-13 at 23:23I would consider a different way to find the formula without matrix calculation1 to obtain the following:
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