how to draw a line on vga ?

[Altera_Forum]

how to draw a line between two point on VGA ( verilog code ) . when i click two point by mouse (ps2) on vga , it will auto connect between two .  

please give me your idea . thanks!

[Altera_Forum]

Hi, 

The common way is to draw on memory then display with a VGA from mem IP. Yet, you can draw directly with X,Y counters of the VGA output and conditioning the output: if(X == 5)RGBOut = color1; if(Y == 10)RGBOut = color2; and it gets more complicated for diagonals that would need raterisation.

[Altera_Forum]

--- Quote Start ---  Hi, The common way is to draw on memory then display with a VGA from mem IP. Yet, you can draw directly with X,Y counters of the VGA output and conditioning the output: if(X == 5)RGBOut = color1; if(Y == 10)RGBOut = color2; and it gets more complicated for diagonals that would need raterisation.  --- Quote End ---    thanks you so much ! but , i have edited my answer ..... please

[Altera_Forum]

Hi, 

Does it "HAS" to be in Verilog only ? No C, no NIOS-II ? are you using some terasic boards ? In that case I would recommend using the NIOS_HOST_MOUSE_VGA project, I didn't work on project, but I expect it to be easier than going through Verilog.

[Altera_Forum]

--- Quote Start ---  Hi, Does it "HAS" to be in Verilog only ? No C, no NIOS-II ? are you using some terasic boards ? In that case I would recommend using the NIOS_HOST_MOUSE_VGA project, I didn't work on project, but I expect it to be easier than going through Verilog.  --- Quote End ---    right ! use NIos easier than . but in my project only allowed use verilog , :( thanks for your comments ... if you have document about it , please share with me :