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Any way to mirror the complete output?
Reilly Hamilton
Member #8,609
May 2007

Is there any way to mirror the entire output in Allegro?

I'm developing a program that needs to be used in an environment where the display reflects off a mirror onto the final projection surface. Is there an easy way to do this in Allegro?

Rampage
Member #3,035
December 2002
avatar

The manual said:

These are like draw_sprite(), but they additionally flip the image vertically, horizontally, or both, respectively. Flipping vertically means that the y-axis is reversed, while flipping horizontally means that the x-axis is reversed, between the source and the destination. This produces exact mirror images, which is not the same as rotating the sprite (and it is a lot faster than the rotation routine). The sprite must be a memory bitmap.

-R

julian_boolean
Member #8,201
January 2007

Your talking about reflections right? Like looking into water or a mirror? Holy crap Allegro has functions for that?? Sweeeeet

Reilly Hamilton
Member #8,609
May 2007

I'm looking for a way to mirror the entire screen, not just a sprite.

Is there a way to mirror the display buffer?

X-G
Member #856
December 2000
avatar

Of course. When copying your backbuffer to the screen, simply draw it upside-down.

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gnolam
Member #2,030
March 2002
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Be sure to clear the buffer with magenta/palette index 0 first though (iff you use it anywhere in your graphics, that is).

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gillius
Member #119
April 2000

I'm really curious to hear where you have an environment where the user views the screen via a mirror...

Gillius
Gillius's Programming -- http://gillius.org/

Reilly Hamilton
Member #8,609
May 2007

We're creating a Heads-Up Display for use in automobiles. The image is reflected off of the windshield, and therefore needs to be flipped horizontally.

Thanks for the help, should be pretty simple.

gillius
Member #119
April 2000

Nice I was hoping it was something like that ;). I work on vehicle sensor systems and diagnostics... I wish we had that for our display ;). I doubt any of our vehicles have a suitable windshield as they are all either vertical or non-existent.

Gillius
Gillius's Programming -- http://gillius.org/

Rampage
Member #3,035
December 2002
avatar

Hey! Where are my cookies? >:(

-R

ixilom
Member #7,167
April 2006
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I ate 'em, tasted bad :-X

___________________________________________
Democracy in Sweden? Not since 2008-Jun-18.
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Dustin Dettmer
Member #3,935
October 2003
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Cooool, allegro is taking over the automobile industry!

GullRaDriel
Member #3,861
September 2003
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Heh, you do not know the new lamborghini Allegro VT ? ;-P

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Kibiz0r
Member #6,203
September 2005
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:o

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