Writing a game / graphics library

Posts: 61
Joined: Tue Oct 21, 2014 11:35 am

Writing a game / graphics library

Thu Feb 26, 2015 12:01 pm

Cut to the good bit, https://www.youtube.com/watch?v=LUY6FEgzcLw

Ok, so all written by me in C. I have a nice library for the LCD that handles all the graphics including things like lines, triangles, boxes and "sprites". I made a little tilemap engine and drew each tile as a sprite. This renders quite quickly as I simply point the hardware SPI buffer at the location of the sprite in memory. Not the most memory friendly approach as each sprite/tile is 32x32x16 making them 2k each! The advantage is that they are RGB565 full colour and render incredibly quickly with hardware SPI.
I am looking at the LCD datasheet to see if I can achieve pixel scrolling (I think it's easy in one axis, not sure about the other). I could do pixel scrolling in my code but that would be a lot slower than letting the LCD do it (a full screen refresh for each pixel).

LCD is again the ili9341 controller, and I am using the touch input on GPIO again. I was just thinking about abusing a touch controller chip to fit an analog joystick onto it :)

Posts: 101
Joined: Thu Dec 04, 2014 6:31 am

Re: Writing a game / graphics library

Thu Feb 26, 2015 1:38 pm

Nice work!
Do you want to explain the basics to use a display as a graphical output?
Buy now - breakout board for VoCore to easy adapting your idea!

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Posts: 839
Joined: Sun Oct 19, 2014 6:00 am

Re: Writing a game / graphics library

Thu Feb 26, 2015 1:40 pm

I watch your youtube video, very good! Looking forward for the library :) want to have a try

Posts: 31
Joined: Tue Jan 06, 2015 5:19 am

Re: Writing a game / graphics library

Sat Jun 20, 2015 2:12 am

This is great, did the code ever get made public?
Many uses for this in a big way.

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