PBG's ADVENTURE! (Yeah!)

[TheShyGuy]

I was gonna explain it, but this little section of code should show a solution much quicker:

Code:

//I assume that hp and maxhp are whole integer values and that each of these variables are defined
    short hp, maxhp, maxHeartsPerRow;
    short cellX, cellY, cellPixelWidth, cellPixelHeight;
    short wholeHeartSpriteID, emptyHeartSpriteID;

    //originX and originY are the top left position to begin rendering hearts from.
    short i;
    short originX, originY, posX, posY;

    /*
    Imagine the hearts being rendered in cells like in a tile grid.
    CellX, CellY refer to their cell index. Using i, the number of
    hearts rendered, we can determine the position to render each heart.
    */
    for (i = 0; i < maxhp; i++)
    {
        cellX = i % maxHeartsPerRow;
        cellY = i / maxHeartsPerRow;

        posX = cellX * cellPixelWidth + originX;
        posY = cellY * cellPixelHeight + originY;

        if (i < hp)
            RenderSprite(wholeHeartSpriteID, posX, posY);
        else
            RenderSprite(emptyHeartSpriteID, posX, posY);
    }