Skewed projetions

SDL Development
1

Hello,

Is there a way to plot a surface/texture on anything OTHER than a rectangle?

This would require a function accepting (all) vertex positions… to produce such an arbitrary Quad.

I’d assume openGL would have such projection functions but then again the promise stated on this talk [1] about having something like a “Duke Nukem 3D” on SDL alone or, at least having the top edge smaller for much simpler stuff like [2], would then be much easier to do. : )

thanks.

[1] https://www.youtube.com/watch?v=Sd8ie5R4CVE
[2] Lou’s pseudo 3d: http://www.extentofthejam.com/pseudo/

EDIT: I’d probably shouldn’t say “projection”, it really only needs to deform the image ‘linearly’ / no perspective.

1 Like
2

Did someone ever figured this or some sort of affine transform or similar in SDL2 renderer?

3

Did someone ever figured this or some sort of affine transform or similar in SDL2 renderer?

SDL_RenderGeometry()/SDL_RenderGeometryRaw() not working for some reason?

4

Ah yes, a header with zero examples thanks

5

Wiki has an example for the basic function. The raw function does the same, but without the handy SDL_Vertex struct.

6

try this approach Am I using SDL_RenderGeometry correctly?