gluLookAt trouble - opengl

Question

I have some code which draws a line along the x, y and z axes. My problem is that these lines are being clipped so that they are invisible near the origin:
This sounds like a far clipping plane issue, but I gave zFar=50 to gluPerspective, which should be plenty. Making it even larger doesn't seem to help. What else could be causing the clipping?
Here is my code:
import static org.lwjgl.opengl.GL11.*;
import org.lwjgl.opengl.*;
import org.lwjgl.util.glu.GLU;
public class Test {
static int width = 300, height = 200;
public static void main(String[] _) throws Exception {
Display.setDisplayMode(new DisplayMode(width, height));
Display.create();
glClear(GL_COLOR_BUFFER_BIT);
// projection matrix
glMatrixMode(GL_PROJECTION_MATRIX);
glLoadIdentity();
GLU.gluPerspective(50, width / (float) height, .1f, 50);
// modelview matrix
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
GLU.gluLookAt(
.8f, .8f, .8f,
0, 0, 0,
0, 1, 0);
// draw a line for each axis
glBegin(GL_LINES);
// x axis in red
glColor3f(1, 0, 0);
glVertex3i(0, 0, 0);
glVertex3i(10, 0, 0);
// y axis in green
glColor3f(0, 1, 0);
glVertex3i(0, 0, 0);
glVertex3i(0, 10, 0);
// z axis in blue
glColor3f(0, 0, 1);
glVertex3i(0, 0, 0);
glVertex3i(0, 0, 10);
glEnd();
Display.update();
// wait for a close event
while (!Display.isCloseRequested()) {
Thread.sleep(20);
Display.processMessages();
}
Display.destroy();
}
}
Update - Removing glLoadIdentity(); after glMatrixMode(GL_MODELVIEW); gives the desired result, but I don't understand why. Isn't the default modelview matrix the identity matrix?
Update - I wrote a C version of the same code and it works as desired. Why the difference?

Answer 1

Indeed, after testing it, it turns out that glMatrixMode(GL_PROJECTION_MATRIX); should be glMatrixMode(GL_PROJECTION); instead.
So it seems that the modelview was active by default and glLoadIdentity() cleared the results of GLU.gluPerspective(50, width / (float) height, .1f, 50);
edit: Btw. in case you wonder what GL_PROJECTION_MATRIX is for, it's to retrieve the current matrix from the top of the matrix stack with glGetFloatv(GL_PROJECTION_MATRIX,output); or glGetDoublev(GL_PROJECTION_MATRIX,output);