CODEWITHSUNDEEP
opengllwjglnifty-gui
zergylord
zergylord

Reputation: 4436

How do I get Nifty GUI to use my coordinate system?

For various reasons, I like having openGL to use coordinates other than pixels, which is easily set via:

Display.setDisplayMode(new DisplayMode(800, 600));
GLU.gluOrtho2D(0f,32f,0f,24f);

However, now that I've begun trying to integrate Nifty GUI into my application, this corrdinate scale is causing problems. Namely, Nifty seems to think openGL is using pixels as units, and thus renders everything gigantic. Is there anyway to fix this?

Upvotes: 1

Views: 267

Answers (2)

Nicol Bolas
Nicol Bolas

Reputation: 474236

Why not just do things the way NiftyGUI wants (pixel coordinates), but only while NiftyGUI is being rendered. This means:

gl.glMatrixMode(gl.GL_PROJECTION_MATRIX);
GLU.gluOrtho2D(0f,32f,0f,24f);
//Render my stuff
gl.glMatrixMode(gl.GL_PROJECTION_MATRIX);
gl.glLoadIdentity();
GLU.gluOrtho2D(0f,width,0f,height);
//Render with NiftyGUI.

Upvotes: 2

datenwolf
datenwolf

Reputation: 162297

You made the classic OpenGL newbie mistake: One time state setting.

OpenGL is not initialized. You re-set every state as you go and as you need it. Do in your case it's completely in order to set the projection matrix to a pixel mapping ortho projection whenever needed and to something else when using Nifty.

Upvotes: 1

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