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Letters Rotate?
03-10-2017, 07:30 PM
Post: #1
Letters Rotate?
With what order can I turn the writing about 90 degrees with the HP Prime?
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03-10-2017, 09:37 PM (This post was last modified: 03-10-2017 09:57 PM by StephenG1CMZ.)
Post: #2
RE: Letters Rotate?
IIRC the best way is to place the text into another graphic screen, rotate it, then overlay that onto the desired graphic.
Or,

http://www.hpmuseum.org/forum/thread-713...ght=Rotate

Stephen Lewkowicz (G1CMZ)
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03-10-2017, 09:48 PM (This post was last modified: 03-10-2017 09:49 PM by Han.)
Post: #3
RE: Letters Rotate?
(03-10-2017 09:37 PM)StephenG1CMZ Wrote:  IIRC the best way is to place the text into another graphic screen, rotate it, then overlay that onto the desired graphic.

http://www.hpmuseum.org/forum/thread-713...ght=Rotate

Erwin's program to rotate a graphics object is really nice. There is an alternative method that might produce slightly different results (perhaps better quality?). Rather than taking a pixel from the source graphics object and rotating it into the destination graphics object, you might get better quality by taking a destination position, applying an inverse rotation, sample the the color there, and then color the destination position with the sample color. This will enable you to have a finer handle on how to color a pixel (in the destination location) that would have presumably come from in between two pixels in the source position.

The mathematics is more or less the same, just in a slightly different order.

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