/*
 *  lines.java
 *  This program demonstrates geometric primitives and
 *  their attributes.
 */

import java.awt.Frame;
import java.io.IOException;
import java.lang.String;
import java.lang.System;

import jgl.GL;
import jgl.GLCanvas;

public class lines extends GLCanvas {

    private void drawOneLine (float x1, float y1, float x2, float y2) {
	myGL.glBegin (GL.GL_LINES);
	    myGL.glVertex2f (x1, y1);
	    myGL.glVertex2f (x2, y2);
	myGL.glEnd ();
    }

    private void myinit () {
	myGL.glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
	myGL.glShadeModel (GL.GL_FLAT);
    }

    public void display () {
	int i;

	myGL.glClear (GL.GL_COLOR_BUFFER_BIT);

	/* select white for all lines  */
	myGL.glColor3f (1.0f, 1.0f, 1.0f);

	/* in 1st row, 3 lines, each with a different stipple */
	myGL.glEnable (GL.GL_LINE_STIPPLE);

	myGL.glLineStipple (1, (short)0x0101);	/* dotted */
	drawOneLine (50.0f, 125.0f, 150.0f, 125.0f);
	myGL.glLineStipple (1, (short)0x00FF);	/* dashed */
	drawOneLine (150.0f, 125.0f, 250.0f, 125.0f);
	myGL.glLineStipple (1, (short)0x1C47);	/* dash/dot/dash */
	drawOneLine (250.0f, 125.0f, 350.0f, 125.0f);

	/* in 2nd row, 3 width lines, each with different stipple */
	myGL.glLineWidth (5.0f);
	myGL.glLineStipple (1, (short)0x0101);
	drawOneLine (50.0f, 100.0f, 150.0f, 100.0f);
	myGL.glLineStipple (1, (short)0x00FF);
	drawOneLine (150.0f, 100.0f, 250.0f, 100.0f);
	myGL.glLineStipple (1, (short)0x1C47);
	drawOneLine (250.0f, 100.0f, 350.0f, 100.0f);
	myGL.glLineWidth (1.0f);

	/* in 3rd row, 6 lines, with dash/dot/dash stipple, */
	/* as part of a single connected line strip */
	myGL.glLineStipple (1, (short)0x1C47);	/* dash/dot/dash */
	myGL.glBegin (GL.GL_LINE_STRIP);
	for (i = 0; i < 7; i++)
	    myGL.glVertex2f (50.0f + ((float)i * 50.0f), 75.0f);
	myGL.glEnd ();

	/* in 4th row, 6 independent lines, */
	/* with dash/dot/dash stipple */
	for (i = 0; i < 6; i++) {
	    drawOneLine (50.0f + ((float)i * 50.0f), 50.0f,
			 50.0f + ((float)(i + 1) * 50.0f), 50.0f);
	}

	/* in 5th row, 1 line, with dash/dot/dash stipple */
	/* and repeat factor of 5 */
	myGL.glLineStipple (1, (short)0x1C47);	/* dash/dot/dash */
	drawOneLine (50.0f, 25.0f, 350.0f, 25.0f);

	myGL.glDisable (GL.GL_LINE_STIPPLE);
	myGL.glFlush ();
    }

    public void myReshape (int w, int h) {
        myGL.glViewport (0, 0, w, h);
        myGL.glMatrixMode (GL.GL_PROJECTION);
        myGL.glLoadIdentity ();
	myGLU.gluOrtho2D (0.0, (double)w, 0.0, (double)h);
    }

    /* ARGSUSED1 */
    public void keyboard (char key, int x, int y) {
	switch (key) {
	    case 27:
		System.exit(0);
	    default:
		break;
	}
    }

    public void init () {
	myUT.glutInitWindowSize (450, 150);
	myUT.glutInitWindowPosition (0, 0);
	myUT.glutCreateWindow (this);
	myinit ();
	myUT.glutDisplayFunc ("display");
	myUT.glutReshapeFunc ("myReshape");
	myUT.glutKeyboardFunc ("keyboard");
	myUT.glutMainLoop ();
    }

    static public void main (String args[]) throws IOException {
	Frame mainFrame = new Frame ();
	mainFrame.setSize (458, 177);
	lines mainCanvas = new lines ();
	mainCanvas.init();
	mainFrame.add (mainCanvas);
	mainFrame.setVisible (true);
    }

}