Reading tiles on map

[Derrik]

I have a 512x512 background inited with:

Code: Select all

int id = bgInit(0, BgType_Text8bpp, BgSize_T_512x512, 28, 0);

And am then trying to get the tiles so I can write a collision system for a game.

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inline u16 getTile(int id, int x, int y) {
    return bgGetMapPtr(id)[y * (512 / 8) + x];
}

Although this function returns values which are in my map, it returns the wrong ones.

[Derrik]

I figured it out, each 256x256 block is placed with inverted X and Y coordinates.