Quoting from the bible JN1-1, it all started with plotting a pixel on the screen. If have you managed to draw a pixel on the screen, then you can write Fifa2012 on your microcontroller, of course on a high specs one :).
By drawing a pixel on the screen, you can use bresenham's line algorithm to draw a line, then you can draw a triangle, then a polygon that is simplified of many triangles, texture, shade, and light it. A great outdated, but still useful resource for all these algorithms is that Book : Computer Graphics, Principles and Practice, Foley, Vandam.
One of the first game consoles that tried to 3D Software Rasterization is the 3DO Console. It has an ARM6 32bit, clocked by 12.5MHz!!. For Embedded guys, I'm sure you will be surprised about how the low were the specs, and how beautiful games were made on that console and now we a smaller, lower power, faster microcontrollers like PIC32.. 3DO Specs
Anyway,
How can we draw a frame of NTSC Signal ?
The pseudo-code for the algorithm is simple:
1. Draw 8 scan lines // top over scan
2. Draw 240 scan lines // the active video
3. Draw 10 scan lines // bottom over scan
4. Generate VSync pulse // send the sync pulse to redraw
5. Delay 6 scan lines
A nice atmel application note for AVR for generating NTSC signals can be found here:
http://www.atmel.com/Images/mega163_3_04.pdf
By drawing a pixel on the screen, you can use bresenham's line algorithm to draw a line, then you can draw a triangle, then a polygon that is simplified of many triangles, texture, shade, and light it. A great outdated, but still useful resource for all these algorithms is that Book : Computer Graphics, Principles and Practice, Foley, Vandam.
One of the first game consoles that tried to 3D Software Rasterization is the 3DO Console. It has an ARM6 32bit, clocked by 12.5MHz!!. For Embedded guys, I'm sure you will be surprised about how the low were the specs, and how beautiful games were made on that console and now we a smaller, lower power, faster microcontrollers like PIC32.. 3DO Specs
Anyway,
How can we draw a frame of NTSC Signal ?
The pseudo-code for the algorithm is simple:
1. Draw 8 scan lines // top over scan
2. Draw 240 scan lines // the active video
3. Draw 10 scan lines // bottom over scan
4. Generate VSync pulse // send the sync pulse to redraw
5. Delay 6 scan lines
A nice atmel application note for AVR for generating NTSC signals can be found here:
http://www.atmel.com/Images/mega163_3_04.pdf
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