Add shadow mapping example

[zigzagoooooon]

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[nahiassis]

this doesnt seem to work on azahar (doesnt render the teapot to the map), and on real hardware it freezes everything, so no luma or anything besides the off button. tried figuring out why this happens but just can't. tried using gpu_fragopmode_shadow and gpu_fragopmode_gl but they just make things worse.

edit: it does work well on a build of citra i have but that's it

[Yackerw]

Works fine for me, on both Azahar and real hardware. Though it kinda looks like there's flickering specs of shadow acne on the teapot.

[marccane]

Works for me too both on hardware and azahar. Amazing demo. Edit: Look at this modification https://github.com/marccane/3dsGraphicsProjects/tree/main/citro3d-shadow-stereo

[nahiassis]

Works for me too both on hardware and azahar. Amazing demo. Edit: Look at this modification https://github.com/marccane/3dsGraphicsProjects/tree/main/citro3d-shadow-stereo

i'll be taking a look thxx

[nahiassis]

yeah no still doesn't work
when the shadow texture makes this cross shape, it is guaranteed to crash (freeze everything) on the "real deal" the 3ds itself.
edit: the incorrect image still does project fine onto objects as can be seen in the image, but no proper shadow exists, so can't be treated as working

edit2: it does work on the 3ds, what?