pi3d "Stretch" Scale

[Nadav]

Slideshow_3d.py scales the picture to "fit" proportionally at the screen resolution.
I am trying to add an option to display the images "stretched" to the screen resolution.

I only have experience with 2D scaling - 3D scaling is ++ much for me
Can someone please explain what values scale expects? (it looks like it is not a direct ratio of how much to scale-by)
Can someone please explain the need for tan & radians (original code posted below)?

Original Slideshow_3d.py code:

Code: Select all

    rat = 1.0 * DISPLAY.width / tex.ix / DISPLAY.height * tex.iy
    if rat > 1.0:
      rat = 1.0
    rat *= 1000.0 * tan(radians(CAMERA.lens[2] / 2.0))
    wi, hi = tex.ix / tex.iy * rat, rat
    slide.set_draw_details(shader,[tex])
    slide.scale(wi, hi, 1.0)

[paddyg]

I will give you a complete explanation when I get home (using phone now so very slow) but 1 the trig is simply aiming to make a quadrilateral that fills the screen at the starting distance. 2 to stretch the image to screen proportions you need something like
wi, hi = DISPLAY.width * factor, DISPLAY.height * factor
Where factor is based on similar calc involving tan etc.

[paddyg]

Sorry for the delay, this seems to work

Code: Select all

    tex = pi3d.Texture(fname, blend=True, mipmap=True) #nicer but slower 3.3MB in 4.5s
    rat = 1000.0 * tan(radians(CAMERA.lens[2] / 2.0))
    wi, hi = (DISPLAY.width  * rat) / DISPLAY.height, rat

[Nadav]

Thanks so much for the working code!
(I don't have any experience in 3D work, so the "tan" & "radians" are a complete mystery to me)