SpritesMind.Net

So I'm experimenting with a very trimmed down version of the "sprite" sample project to better understand sprite control, and I'm having a little trouble. I've created a simple project that spawns a single sprite, then attempts to set its position using SPR_setPosition and the D-pad controls (I've attached the project file).

The sprite displays correctly, but my movement controls don't seem to work, it only nudges it in either X/Y direction by ~1pixel. I used VDP_drawText to display the coordinates on screen so I know the controls should be working, but the setPosition command doesn't seem to work how I'm expecting it to. Is there something obvious I'm missing, or do I just have a fundamental misunderstanding of how sprite movement works?

Thank you for your help

Your coordinates are in fix32 type (fixed point number), so adding -1 or +1 will only modify from the minimal amount the fractional part.
If you want to add 1 pixel you need to add FIX32(1)

You should read this document :
https://github.com/Stephane-D/SGDK/wiki/Tuto-Maths

To understand how SGDK handle these fixed point numbers

Ah, rookie mistake, trying to do math with dissimilar variable types. Obvious in hindsight! Just need to get used to the new int/float types, thank you!