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Index › Programming Questions & Help › Programs › 3d Override Camera

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3d Override Camera? (Read 538 times)

catstack

3d Override Camera?
Feb 12^th, 2010, 4:23pm

Hey,

I'm creating a scene in 3d (with opengl) and am using the camera() method to position a plane on the screen. I would like to add some text, so that it doesn't get applied to the camera's orientation (which changes based on the mouses position) of the screen. Something like this:

However, I keep getting the following:

Is there a way to have the text override the camera's orientation of the screen? I've tried applying the text() function before calling camera(), but this doesn't seem to work.

Thanks

ben_hem

Re: 3d Override Camera?
Reply #1 - Feb 12^th, 2010, 7:27pm

Well, for drawing your plane, a geometric transform is preferable to a camera transform. There's no need to change the default camera settings to achieve the example image... The relevant commands are going to be:

pushMatrix();
translate(xshift, yshift, zshift);
rotateX(number from 0 to TWO_PI [Processing's notation for 2π]);
rotateY(similar, just rotates the plane along the y axis rather than the x axis)
popMatrix();

The push saves the current matrix state, and the pop returns to that state. They're always used in pairs. This way, if you do some text output after this, it will stay where you tell it to.

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