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beginnerfurqan · 2005-03-17T20:18:09+00:00

this is the code im using to move an object: static int shoulder = 0, elbow = 0, fingerone = 0; static void myDisplay(void) .. glRotatef (shoulder, 0.0, 0.0, 1.0); //create object void myKeyboard switch (key) { case 's': shoulder = (shoulder + 5) % 360; glutPostRedisplay (); break; case 'S': however, this rotates the objects. what i would like to do is move the camera instead. what command would i need? can anyone help please.

Let's say your camera has position camX, camY, camZ, and a rotation camRot about some axis. Given that, the following code should rotate and position your camera and object correctly:

glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(-camRot, 0.0, 1.0, 0.0); // Or whatever axis you want to rotate around
glTranslatef(-camX, -camY, -camZ);
glTranslatef(shoulderX, shoulderY, shoulderZ); // If you want to translate your object also
glRotatef(shoulder, 0.0, 0.0, 1.0);

As to the why's, that's a fairly big subject. I'd start with the Red Book, if you have it, and look at the sections on coordinate systems and camera and object transforms.

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