Making a sprite question

[jac77794]

Hi, I don't have much programming experience, so have being looking at others code. I can't work out why when for example from SuperSpaceShooter

Code: Select all

const byte heart2[] PROGMEM = {
    5, 5,
    B01010111,
    B11111111,
    B11111111,
    B01110111,
    B00100111
};


it says 5,5 so I assume it is 5 pixels by 5 and it has that amount of rows ,but 8 horizontal numbers please explain for a noob. Also any other helpful information about this topic, as it is the hardest for me to understand, would be much appreciated.

Many thanks

[msevilgenius]

Each of the numbers (B010001111) is one byte long (eight binary digits), if you were to only put five e.g. B01010 it would be interpreted as B00001010 so that line of the image would be 00001 instead of the desired 01010.

There are a couple of image encoders available that you can use to create the sprites, such as the one in the GB toolkit, so you don't have to worry about it too much.

[yodasvideoarcade]

It simply means: Each of the bytes has to have eight numbers (either 0 or 1), otherwise it's not a byte.

If your sprite is only 5 pixels wide, just fill the remaining 3 numbers with 000.

[rodot]

Just in case you missed it: you can convert pictures to the Gamebuino format using the toolkit which is on github.