Thread: Help with Dark GDK drawing a constellation (newbie)

Hey everyone.

I'm really new to Dark GDK and C++ in general, but I'm learning.

I was assigned by my friend who happens to be teaching me C++ in his free time to plot the Corona Australis constellation using the DbCircle (for the points of the stars), and the DbLine command to connect them.

here is what I want to do:

NOTE: Using the basic 640 x 480 window size
//Skeleton
#include "DarkGDK.h"

Void DarkGDK()
{

//Wait for key input with "Press any Key" message in the middle of the screen, so I guess that would be:

dbText(320,240,"Press any key")? Or would I have to do something different?

//Then I want to be able to have it draw all the points for Corona Australis on the 640 by 480 window after pressing a key. This is where I need help. I want to use dbCircle commands to draw the star points, and dbLine to connect them after a key press. I also want it to display a picture of saggitarius (Can be an JPG or GIF or any image type) in the background after the points have been plotted and connected with lines.

I know this is a lot to ask but its a fairly simple program and Im wondering if anyone has free time if they could do it so I can work and learn off of your code?

Here are links to the 2 images which are a picture of Corona Australis and the image of Sagittarius i wanted to use to place in the background on the 3rd key press.

Corona Australis (the constellation)
Imageshack - coronaaustralis.gif

Sagittarius
Imageshack - sagittarius2.gif

So here is basically what I want it to do.

Open a window 640x480,
Display message in the middle of the screen that says "Press any Key to Continue"
wait for key press

Display all 8 points (Stars) of Corona Australis,

wait for 2nd key press

Connect all points together using dbLine

wait for 3rd key press

Display uploaded image of Sagittarius in the background behind Corona Australis.

Thanks so much to anyone who can write this short program for me, I'm really trying to learn

I would create the primitive created by the connected points first. Reduce the scale of the primitive uniformly by 1 or 2 floats and draw that to the stencil buffer. Then draw the full primitive to the back buffer. End result: constellation connected by lines.