package glredbook10;
import java.awt.event.*;
import javax.swing.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;
/**
* This program demonstrates use of the accumulation buffer to create an
* out-of-focus depth-of-field effect. The teapots are drawn several times into
* the accumulation buffer. The viewing volume is jittered, except at the focal
* point, where the viewing volume is at the same position, each time. In this
* case, the gold teapot remains in focus.
*
* @author Kiet Le (java port)
*/
public class dof
extends JFrame
implements GLEventListener, KeyListener
{
private GLCapabilities caps;
private GLCanvas canvas;
private FPSAnimator animator;
private GLU glu;
private GLUT glut;
//
private int teapotList;
public dof()
{
super("dof");
// Be certain you request an accumulation buffer.
caps = new GLCapabilities();
caps.setAccumAlphaBits(16);
caps.setAccumBlueBits(16);
caps.setAccumGreenBits(16);
caps.setAccumRedBits(16);
canvas = new GLCanvas(caps);
canvas.addGLEventListener(this);
canvas.addKeyListener(this);
animator = new FPSAnimator(canvas, 30);
getContentPane().add(canvas);
}
public void run()
{
setSize(400, 400);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
animator.start();
}
public static void main(String[] args)
{
new dof().run();
}
public void init(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
glu = new GLU();
glut = new GLUT();
//
float ambient[] = new float[]
{ 0.0f, 0.0f, 0.0f, 1.0f };
float diffuse[] = new float[]
{ 1.0f, 1.0f, 1.0f, 1.0f };
float specular[] = new float[]
{ 1.0f, 1.0f, 1.0f, 1.0f };
float position[] = new float[]
{ 0.0f, 3.0f, 3.0f, 0.0f };
float lmodel_ambient[] = new float[]
{ 0.2f, 0.2f, 0.2f, 1.0f };
float local_view[] = new float[]
{ 0.0f };
gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, ambient, 0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, diffuse, 0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, position, 0);
gl.glLightModelfv(GL.GL_LIGHT_MODEL_AMBIENT, lmodel_ambient, 0);
gl.glLightModelfv(GL.GL_LIGHT_MODEL_LOCAL_VIEWER, local_view, 0);
gl.glFrontFace(GL.GL_CW);
gl.glEnable(GL.GL_LIGHTING);
gl.glEnable(GL.GL_LIGHT0);
gl.glEnable(GL.GL_AUTO_NORMAL);
gl.glEnable(GL.GL_NORMALIZE);
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.glClearAccum(0.0f, 0.0f, 0.0f, 0.0f);
/* make teapot display list */
teapotList = gl.glGenLists(1);
gl.glNewList(teapotList, GL.GL_COMPILE);
glut.glutSolidTeapot(0.5f);
gl.glEndList();
}
public void display(GLAutoDrawable drawable)
{
GL gl = drawable.getGL();
//
int jitter;
int viewport[] = new int[4];
gl.glGetIntegerv(GL.GL_VIEWPORT, viewport, 0);
gl.glClear(GL.GL_ACCUM_BUFFER_BIT);
for (jitter = 0; jitter < 8; jitter++)
{
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
accPerspective(gl, 45.0, (double) viewport[2] / (double) viewport[3],
1.0, 15.0, 0.0, 0.0, 0.33 * j8[jitter].x, 0.33 * j8[jitter].y, 5.0);
/* ruby, gold, silver, emerald, and cyan teapots */
renderTeapot(gl, -1.1f, -0.5f, -4.5f, 0.1745f, 0.01175f, 0.01175f,
0.61424f, 0.04136f, 0.04136f, 0.727811f, 0.626959f, 0.626959f, 0.6f);
renderTeapot(gl, -0.5f, -0.5f, -5.0f, 0.24725f, 0.1995f, 0.0745f,
0.75164f, 0.60648f, 0.22648f, 0.628281f, 0.555802f, 0.366065f, 0.4f);
renderTeapot(gl, 0.2f, -0.5f, -5.5f, 0.19225f, 0.19225f, 0.19225f,
0.50754f, 0.50754f, 0.50754f, 0.508273f, 0.508273f, 0.508273f, 0.4f);
renderTeapot(gl, 1.0f, -0.5f, -6.0f, 0.0215f, 0.1745f, 0.0215f, 0.07568f,
0.61424f, 0.07568f, 0.633f, 0.727811f, 0.633f, 0.6f);
renderTeapot(gl, 1.8f, -0.5f, -6.5f, 0.0f, 0.1f, 0.06f, 0.0f,
0.50980392f, 0.50980392f, 0.50196078f, 0.50196078f, 0.50196078f, .25f);
gl.glAccum(GL.GL_ACCUM, 0.125f);
}
gl.glAccum(GL.GL_RETURN, 1.0f);
gl.glFlush();
}
public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h)
{
GL gl = drawable.getGL();
gl.glViewport(0, 0, w, h);
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
boolean deviceChanged)
{
}
/*
* accFrustum() The first 6 arguments are identical to the glFrustum() call.
* pixdx and pixdy are anti-alias jitter in pixels. Set both equal to 0.0 for
* no anti-alias jitter. eyedx and eyedy are depth-of field jitter in pixels.
* Set both equal to 0.0 for no depth of field effects. focus is distance from
* eye to plane in focus. focus must be greater than, but not equal to 0.0.
* Note that accFrustum() calls glTranslatef(). You will probably want to
* insure that your ModelView matrix has been initialized to identity before
* calling accFrustum().
*/
private void accFrustum(GL gl, double left, double right, double bottom,
double top, double near, double far, double pixdx, double pixdy,
double eyedx, double eyedy, double focus)
{
double xwsize, ywsize;
double dx, dy;
int viewport[] = new int[4];
gl.glGetIntegerv(GL.GL_VIEWPORT, viewport, 0);
xwsize = right - left;
ywsize = top - bottom;
dx = -(pixdx * xwsize / (double) viewport[2] + eyedx * near / focus);
dy = -(pixdy * ywsize / (double) viewport[3] + eyedy * near / focus);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
gl.glFrustum(left + dx, right + dx, bottom + dy, top + dy, near, far);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef((float) -eyedx, (float) -eyedy, 0.0f);
}
/*
* accPerspective() The first 4 arguments are identical to the
* gluPerspective() call. pixdx and pixdy are anti-alias jitter in pixels. Set
* both equal to 0.0 for no anti-alias jitter. eyedx and eyedy are depth-of
* field jitter in pixels. Set both equal to 0.0 for no depth of field
* effects. focus is distance from eye to plane in focus. focus must be
* greater than, but not equal to 0.0. Note that accPerspective() calls
* accFrustum().
*/
private void accPerspective(GL gl, double fovy, double aspect, double near,
double far, double pixdx, double pixdy, double eyedx, double eyedy,
double focus)
{
double fov2, left, right, bottom, top;
fov2 = ((fovy * Math.PI) / 180.0) / 2.0;
top = near / (Math.cos(fov2) / Math.sin(fov2));
bottom = -top;
right = top * aspect;
left = -right;
accFrustum(gl, left, right, bottom, top, near, far, pixdx, pixdy, eyedx,
eyedy, focus);
}
private void renderTeapot(GL gl, float x, float y, float z, float ambr,
float ambg, float ambb, float difr, float difg, float difb, float specr,
float specg, float specb, float shine)
{
float mat[] = new float[4];
gl.glPushMatrix();
gl.glTranslatef(x, y, z);
mat[0] = ambr;
mat[1] = ambg;
mat[2] = ambb;
mat[3] = 1.0f;
gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT, mat, 0);
mat[0] = difr;
mat[1] = difg;
mat[2] = difb;
gl.glMaterialfv(GL.GL_FRONT, GL.GL_DIFFUSE, mat, 0);
mat[0] = specr;
mat[1] = specg;
mat[2] = specb;
gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, mat, 0);
gl.glMaterialf(GL.GL_FRONT, GL.GL_SHININESS, shine * 128.0f);
gl.glCallList(teapotList);
gl.glPopMatrix();
}
/*
* display() draws 5 teapots into the accumulation buffer several times; each
* time with a jittered perspective. The focal point is at z = 5.0, so the
* gold teapot will stay in focus. The amount of jitter is adjusted by the
* magnitude of the accPerspective() jitter; in this example, 0.33. In this
* example, the teapots are drawn 8 times. See jitter.h
*/
public void keyTyped(KeyEvent key)
{
}
public void keyPressed(KeyEvent key)
{
switch (key.getKeyChar()) {
case KeyEvent.VK_ESCAPE:
System.exit(0);
break;
default:
break;
}
}
public void keyReleased(KeyEvent key)
{
}
/* 2 jitter points */
jitter_point j2[] =
{ new jitter_point(0.246490f, 0.249999f),
new jitter_point(-0.246490f, -0.249999f) };
/* 3 jitter points */
jitter_point j3[] =
{ new jitter_point(-0.373411, -0.250550),//
new jitter_point(0.256263, 0.368119), //
new jitter_point(0.117148, -0.117570) };
/* 4 jitter points */
jitter_point j4[] =
{ new jitter_point(-0.208147, 0.353730),
new jitter_point(0.203849, -0.353780),
new jitter_point(-0.292626, -0.149945),
new jitter_point(0.296924, 0.149994) };
/* 8 jitter points */
jitter_point j8[] =
{ new jitter_point(-0.334818, 0.435331),
new jitter_point(0.286438, -0.393495),
new jitter_point(0.459462, 0.141540),
new jitter_point(-0.414498, -0.192829),
new jitter_point(-0.183790, 0.082102),
new jitter_point(-0.079263, -0.317383),
new jitter_point(0.102254, 0.299133), new jitter_point(0.164216, -0.054399) };
/* 15 jitter points */
jitter_point j15[] =
{ new jitter_point(0.285561, 0.188437),
new jitter_point(0.360176, -0.065688),
new jitter_point(-0.111751, 0.275019),
new jitter_point(-0.055918, -0.215197),
new jitter_point(-0.080231, -0.470965),
new jitter_point(0.138721, 0.409168), new jitter_point(0.384120, 0.458500),
new jitter_point(-0.454968, 0.134088),
new jitter_point(0.179271, -0.331196),
new jitter_point(-0.307049, -0.364927),
new jitter_point(0.105354, -0.010099),
new jitter_point(-0.154180, 0.021794),
new jitter_point(-0.370135, -0.116425),
new jitter_point(0.451636, -0.300013),
new jitter_point(-0.370610, 0.387504) };
/* 24 jitter points */
jitter_point j24[] =
{ new jitter_point(0.030245, 0.136384),
new jitter_point(0.018865, -0.348867),
new jitter_point(-0.350114, -0.472309),
new jitter_point(0.222181, 0.149524),
new jitter_point(-0.393670, -0.266873),
new jitter_point(0.404568, 0.230436), new jitter_point(0.098381, 0.465337),
new jitter_point(0.462671, 0.442116),
new jitter_point(0.400373, -0.212720),
new jitter_point(-0.409988, 0.263345),
new jitter_point(-0.115878, -0.001981),
new jitter_point(0.348425, -0.009237),
new jitter_point(-0.464016, 0.066467),
new jitter_point(-0.138674, -0.468006),
new jitter_point(0.144932, -0.022780),
new jitter_point(-0.250195, 0.150161),
new jitter_point(-0.181400, -0.264219),
new jitter_point(0.196097, -0.234139),
new jitter_point(-0.311082, -0.078815),
new jitter_point(0.268379, 0.366778),
new jitter_point(-0.040601, 0.327109),
new jitter_point(-0.234392, 0.354659),
new jitter_point(-0.003102, -0.154402),
new jitter_point(0.297997, -0.417965) };
/* 66 jitter points */
jitter_point j66[] =
{ new jitter_point(0.266377, -0.218171),
new jitter_point(-0.170919, -0.429368),
new jitter_point(0.047356, -0.387135),
new jitter_point(-0.430063, 0.363413),
new jitter_point(-0.221638, -0.313768),
new jitter_point(0.124758, -0.197109),
new jitter_point(-0.400021, 0.482195),
new jitter_point(0.247882, 0.152010),
new jitter_point(-0.286709, -0.470214),
new jitter_point(-0.426790, 0.004977),
new jitter_point(-0.361249, -0.104549),
new jitter_point(-0.040643, 0.123453),
new jitter_point(-0.189296, 0.438963),
new jitter_point(-0.453521, -0.299889),
new jitter_point(0.408216, -0.457699),
new jitter_point(0.328973, -0.101914),
new jitter_point(-0.055540, -0.477952),
new jitter_point(0.194421, 0.453510), //
new jitter_point(0.404051, 0.224974), //
new jitter_point(0.310136, 0.419700),
new jitter_point(-0.021743, 0.403898),
new jitter_point(-0.466210, 0.248839),
new jitter_point(0.341369, 0.081490),
new jitter_point(0.124156, -0.016859),
new jitter_point(-0.461321, -0.176661),
new jitter_point(0.013210, 0.234401),
new jitter_point(0.174258, -0.311854),
new jitter_point(0.294061, 0.263364),
new jitter_point(-0.114836, 0.328189),
new jitter_point(0.041206, -0.106205),
new jitter_point(0.079227, 0.345021),
new jitter_point(-0.109319, -0.242380),
new jitter_point(0.425005, -0.332397),
new jitter_point(0.009146, 0.015098),
new jitter_point(-0.339084, -0.355707),
new jitter_point(-0.224596, -0.189548),
new jitter_point(0.083475, 0.117028),
new jitter_point(0.295962, -0.334699),
new jitter_point(0.452998, 0.025397),
new jitter_point(0.206511, -0.104668),
new jitter_point(0.447544, -0.096004),
new jitter_point(-0.108006, -0.002471),
new jitter_point(-0.380810, 0.130036),
new jitter_point(-0.242440, 0.186934),
new jitter_point(-0.200363, 0.070863),
new jitter_point(-0.344844, -0.230814),
new jitter_point(0.408660, 0.345826),
new jitter_point(-0.233016, 0.305203),
new jitter_point(0.158475, -0.430762),
new jitter_point(0.486972, 0.139163),
new jitter_point(-0.301610, 0.009319),
new jitter_point(0.282245, -0.458671),
new jitter_point(0.482046, 0.443890),
new jitter_point(-0.121527, 0.210223),
new jitter_point(-0.477606, -0.424878),
new jitter_point(-0.083941, -0.121440),
new jitter_point(-0.345773, 0.253779),
new jitter_point(0.234646, 0.034549),
new jitter_point(0.394102, -0.210901),
new jitter_point(-0.312571, 0.397656),
new jitter_point(0.200906, 0.333293),
new jitter_point(0.018703, -0.261792),
new jitter_point(-0.209349, -0.065383),
new jitter_point(0.076248, 0.478538),
new jitter_point(-0.073036, -0.355064),
new jitter_point(0.145087, 0.221726) };
class jitter_point
{
private static final int MAX_SAMPLES = 66;
float x, y;
public jitter_point(double x, double y)
{
this.x = (float) x;
this.y = (float) y;
}
}
}
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