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/**
* @(#) molehill.java
* @(#) author: unknown (converted to Java by Ron Cemer)
*/
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.util.*;
import java.io.*;
import java.util.*;
import gl4java.GLContext;
import gl4java.awt.GLCanvas;
public class molehill extends Applet
{
molehillCanvas canvas = null;
/* Initialize the applet */
public void init()
{
Dimension d = getSize();
setLayout(new BorderLayout());
canvas = new molehillCanvas(d.width, d.height);
add("Center", canvas);
}
/* Start the applet */
public void start()
{
}
/* Stop the applet */
public void stop()
{
}
/* Destroy the applet */
public void destroy()
{
canvas.cvsDispose();
}
public static void main( String args[] )
{
Frame mainFrame = new Frame("molehill");
molehill applet = new molehill();
applet.setSize(400, 400);
applet.init();
applet.start();
mainFrame.add(applet);
mainFrame.pack();
mainFrame.setVisible(true);
}
/* Local GLCanvas extension class */
private class molehillCanvas extends GLCanvas
{
float mat_red_diffuse[] = { 0.7f, 0.0f, 0.1f, 1.0f };
float mat_green_diffuse[] = { 0.0f, 0.7f, 0.1f, 1.0f };
float mat_blue_diffuse[] = { 0.0f, 0.1f, 0.7f, 1.0f };
float mat_yellow_diffuse[] = { 0.7f, 0.8f, 0.1f, 1.0f };
float mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
float mat_shininess[] = { 100.0f };
float knots[] = { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f };
float pts1[] = new float[4*4*3];
float pts2[] = new float[4*4*3];
float pts3[] = new float[4*4*3];
float pts4[] = new float[4*4*3];
int nurb;
int u, v;
public molehillCanvas(int w, int h)
{
super(w, h);
GLContext.gljNativeDebug = false;
GLContext.gljClassDebug = false;
}
public void preInit()
{
doubleBuffer = true;
stereoView = false;
}
public void init()
{
System.out.println("init(): " + this);
reshape(getSize().width, getSize().height);
gl.glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
gl.glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
gl.glEnable(GL_LIGHTING);
gl.glEnable(GL_LIGHT0);
gl.glEnable(GL_DEPTH_TEST);
gl.glEnable(GL_AUTO_NORMAL);
gl.glEnable(GL_NORMALIZE);
nurb = glu.gluNewNurbsRenderer();
glu.gluNurbsProperty(nurb, GLU_SAMPLING_TOLERANCE, 25.0f);
glu.gluNurbsProperty(nurb, GLU_DISPLAY_MODE, GLU_FILL);
/* Build control points for NURBS mole hills. */
for(u=0; u<4; u++)
{
for(v=0; v<4; v++)
{
/* Red. */
pts1[(u*12)+(v*3)+0] = 2.0f*((float)u);
pts1[(u*12)+(v*3)+1] = 2.0f*((float)v);
if((u==1 || u == 2) && (v == 1 || v == 2))
pts1[(u*12)+(v*3)+2] = 6.0f; /* Stretch up middle. */
else
pts1[(u*12)+(v*3)+2] = 0.0f;
/* Green. */
pts2[(u*12)+(v*3)+0] = 2.0f*((float)u - 3.0f);
pts2[(u*12)+(v*3)+1] = 2.0f*((float)v - 3.0f);
if((u==1 || u == 2) && (v == 1 || v == 2))
if(u == 1 && v == 1)
pts2[(u*12)+(v*3)+2] = 15.0f; /* Pull hard on single middle square. */
else
pts2[(u*12)+(v*3)+2] = -2.0f; /* Push down on other middle squares. */
else
pts2[(u*12)+(v*3)+2] = 0.0f;
/* Blue. */
pts3[(u*12)+(v*3)+0] = 2.0f*((float)u - 3.0f);
pts3[(u*12)+(v*3)+1] = 2.0f*((float)v);
if((u==1 || u == 2) && (v == 1 || v == 2))
if(u == 1 && v == 2)
pts3[(u*12)+(v*3)+2] = 11.0f; /* Pull up on single middple square. */
else
pts3[(u*12)+(v*3)+2] = 2.0f; /* Pull up slightly on other middle squares. */
else
pts3[(u*12)+(v*3)+2] = 0.0f;
/* Yellow. */
pts4[(u*12)+(v*3)+0] = 2.0f*((float)u);
pts4[(u*12)+(v*3)+1] = 2.0f*((float)v - 3.0f);
if((u==1 || u == 2 || u == 3) && (v == 1 || v == 2))
if(v == 1)
pts4[(u*12)+(v*3)+2] = -2.0f; /* Push down front middle and right squares. */
else
pts4[(u*12)+(v*3)+2] = 5.0f; /* Pull up back middle and right squares. */
else
pts4[(u*12)+(v*3)+2] = 0.0f;
}
}
/* Stretch up red's far right corner. */
pts1[(3*12)+(3*3)+2] = 6;
/* Pull down green's near left corner a little. */
pts2[(0*12)+(0*3)+2] = -2;
/* Turn up meeting of four corners. */
pts1[(0*12)+(0*3)+2] = 1;
pts2[(3*12)+(3*3)+2] = 1;
pts3[(3*12)+(0*3)+2] = 1;
pts4[(0*12)+(3*3)+2] = 1;
gl.glMatrixMode(GL_PROJECTION);
glu.gluPerspective(55.0f, 1.0f, 2.0f, 24.0f);
gl.glMatrixMode(GL_MODELVIEW);
gl.glTranslatef(0.0f, 0.0f, -15.0f);
gl.glRotatef(330.0f, 1.0f, 0.0f, 0.0f);
gl.glNewList(1, GL_COMPILE);
/* Render red hill. */
gl.glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_red_diffuse);
glu.gluBeginSurface(nurb);
glu.gluNurbsSurface
(nurb,
8,
knots,
8,
knots,
(4 * 3),
3,
pts1,
4,
4,
GL_MAP2_VERTEX_3);
glu.gluEndSurface(nurb);
/* Render green hill. */
gl.glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_green_diffuse);
glu.gluBeginSurface(nurb);
glu.gluNurbsSurface
(nurb,
8,
knots,
8,
knots,
(4 * 3),
3,
pts2,
4,
4,
GL_MAP2_VERTEX_3);
glu.gluEndSurface(nurb);
/* Render blue hill. */
gl.glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_blue_diffuse);
glu.gluBeginSurface(nurb);
glu.gluNurbsSurface
(nurb,
8,
knots,
8,
knots,
(4 * 3),
3,
pts3,
4,
4,
GL_MAP2_VERTEX_3);
glu.gluEndSurface(nurb);
/* Render yellow hill. */
gl.glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_yellow_diffuse);
glu.gluBeginSurface(nurb);
glu.gluNurbsSurface
(nurb,
8,
knots,
8,
knots,
(4 * 3),
3,
pts4,
4,
4,
GL_MAP2_VERTEX_3);
glu.gluEndSurface(nurb);
gl.glEndList();
glj.gljCheckGL();
}
public void cvsDispose()
{
System.out.println("destroy(): " + this);
super.cvsDispose();
}
public void reshape(int width, int height)
{
gl.glViewport(0,0,width,height);
gl.glMatrixMode(GL_PROJECTION);
}
public void display()
{
if (glj.gljMakeCurrent() == false) return;
gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gl.glCallList(1);
gl.glFlush();
glj.gljSwap();
glj.gljCheckGL();
glj.gljFree();
}
}
}
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