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Diffstat (limited to 'demos/RonsDemos/movelight.java')
| -rw-r--r-- | demos/RonsDemos/movelight.java | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/demos/RonsDemos/movelight.java b/demos/RonsDemos/movelight.java new file mode 100644 index 0000000..bb983d9 --- /dev/null +++ b/demos/RonsDemos/movelight.java @@ -0,0 +1,322 @@ +/**
+ * @(#) movelight.java
+ * @(#) author: Silicon Graphics (converted to Java by Ron Cemer)
+ */
+
+/*
+ * Copyright (c) 1993-1997, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission.
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * US Government Users Restricted Rights
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States. Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
+ */
+
+/*
+ * movelight.java
+ * This applet demonstrates when to issue lighting and
+ * transformation commands to render a model with a light
+ * which is moved by a modeling transformation (rotate or
+ * translate). The light position is reset after the modeling
+ * transformation is called. The eye position does not change.
+ *
+ * A torus is drawn using a grey material characteristic.
+ * A single light source illuminates the object.
+ *
+ * Interaction: pressing the left mouse button alters
+ * the modeling transformation (x rotation) by 30 degrees.
+ * The scene is then redrawn with the light in a new position.
+ */
+
+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 movelight extends Applet
+{
+ private static final float boxnormals[][] =
+ {
+ {-1.0f, 0.0f, 0.0f},
+ {0.0f, 1.0f, 0.0f},
+ {1.0f, 0.0f, 0.0f},
+ {0.0f, -1.0f, 0.0f},
+ {0.0f, 0.0f, 1.0f},
+ {0.0f, 0.0f, -1.0f}
+ };
+ private static final int boxfaces[][] =
+ {
+ {0, 1, 2, 3},
+ {3, 2, 6, 7},
+ {7, 6, 5, 4},
+ {4, 5, 1, 0},
+ {5, 6, 2, 1},
+ {7, 4, 0, 3}
+ };
+
+ movelightCanvas canvas = null;
+
+
+ /* Initialize the applet */
+
+
+ public void init()
+ {
+ Dimension d = getSize();
+ setLayout(new BorderLayout());
+ canvas = new movelightCanvas(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();
+ }
+
+
+ /* Local GLCanvas extension class */
+
+
+ private class movelightCanvas extends GLCanvas implements MouseListener
+ {
+ private static final float M_PI = 3.14159265359f;
+
+ private int spin = 0;
+
+ public movelightCanvas(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.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+ gl.glShadeModel(GL_SMOOTH);
+ gl.glEnable(GL_LIGHTING);
+ gl.glEnable(GL_LIGHT0);
+ gl.glEnable(GL_DEPTH_TEST);
+
+ glj.gljCheckGL();
+
+ addMouseListener(this);
+ }
+
+ public void cvsDispose()
+ {
+ System.out.println("destroy(): " + this);
+ removeMouseListener(this);
+ super.cvsDispose();
+ }
+
+ public void reshape(int width, int height)
+ {
+ gl.glViewport(0,0,width,height);
+ gl.glMatrixMode(GL_PROJECTION);
+ gl.glLoadIdentity();
+ glu.gluPerspective(40.0f,(float)width/(float)height,1.0f,20.0f);
+ gl.glMatrixMode(GL_MODELVIEW);
+ gl.glLoadIdentity();
+ }
+
+ public void display()
+ {
+ if (glj.gljMakeCurrent() == false) return;
+
+ float position[] = { 0.0f, 0.0f, 1.5f, 1.0f };
+
+ gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ gl.glPushMatrix();
+ glu.gluLookAt(0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
+
+ gl.glPushMatrix();
+ gl.glRotated((double)spin, 1.0, 0.0, 0.0);
+ gl.glLightfv(GL_LIGHT0, GL_POSITION, position);
+
+ gl.glTranslated(0.0, 0.0, 1.5);
+ gl.glDisable(GL_LIGHTING);
+ gl.glColor3f(0.0f, 1.0f, 1.0f);
+ glutWireCube(0.1f);
+ gl.glEnable(GL_LIGHTING);
+ gl.glPopMatrix();
+
+ glutSolidTorus(0.275f, 0.85f, 8, 15);
+ gl.glPopMatrix();
+ gl.glFlush();
+
+ glj.gljSwap();
+ glj.gljCheckGL();
+ glj.gljFree();
+ }
+
+ // Imported from glut.
+ private void glutWireCube(float size)
+ {
+ drawBox(size, GL_LINE_LOOP);
+ }
+
+ // Imported from glut.
+ private void glutSolidTorus
+ (float innerRadius,
+ float outerRadius,
+ int nsides,
+ int rings)
+ {
+ doughnut(innerRadius, outerRadius, nsides, rings);
+ }
+
+ // Imported from glut.
+ private void drawBox(float size, int type)
+ {
+ float v[][] = new float[8][3];
+ int i;
+
+ v[0][0] = v[1][0] = v[2][0] = v[3][0] = -size / 2;
+ v[4][0] = v[5][0] = v[6][0] = v[7][0] = size / 2;
+ v[0][1] = v[1][1] = v[4][1] = v[5][1] = -size / 2;
+ v[2][1] = v[3][1] = v[6][1] = v[7][1] = size / 2;
+ v[0][2] = v[3][2] = v[4][2] = v[7][2] = -size / 2;
+ v[1][2] = v[2][2] = v[5][2] = v[6][2] = size / 2;
+
+ for (i = 5; i >= 0; i--)
+ {
+ gl.glBegin(type);
+ gl.glNormal3fv(boxnormals[i]);
+ gl.glVertex3fv(v[boxfaces[i][0]]);
+ gl.glVertex3fv(v[boxfaces[i][1]]);
+ gl.glVertex3fv(v[boxfaces[i][2]]);
+ gl.glVertex3fv(v[boxfaces[i][3]]);
+ gl.glEnd();
+ }
+ }
+
+ // Imported from glut.
+ private void doughnut(float r, float R, int nsides, int rings)
+ {
+ int i, j;
+ float theta, phi, theta1;
+ float cosTheta, sinTheta;
+ float cosTheta1, sinTheta1;
+ float ringDelta, sideDelta;
+
+ ringDelta = 2.0f * M_PI / rings;
+ sideDelta = 2.0f * M_PI / nsides;
+
+ theta = 0.0f;
+ cosTheta = 1.0f;
+ sinTheta = 0.0f;
+ for (i = rings - 1; i >= 0; i--)
+ {
+ theta1 = theta + ringDelta;
+ cosTheta1 = (float)Math.cos(theta1);
+ sinTheta1 = (float)Math.sin(theta1);
+ gl.glBegin(GL_QUAD_STRIP);
+ phi = 0.0f;
+ for (j = nsides; j >= 0; j--)
+ {
+ float cosPhi, sinPhi, dist;
+
+ phi += sideDelta;
+ cosPhi = (float)Math.cos(phi);
+ sinPhi = (float)Math.sin(phi);
+ dist = R + r * cosPhi;
+
+ gl.glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
+ gl.glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
+ gl.glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
+ gl.glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi);
+ }
+ gl.glEnd();
+ theta = theta1;
+ cosTheta = cosTheta1;
+ sinTheta = sinTheta1;
+ }
+ }
+
+ // Methods required for the implementation of MouseListener
+ public void mouseEntered( MouseEvent evt )
+ {
+ }
+
+ public void mouseExited( MouseEvent evt )
+ {
+ }
+
+ public void mousePressed( MouseEvent evt )
+ {
+ spin = (spin + 30) % 360;
+ repaint();
+ }
+
+ public void mouseReleased( MouseEvent evt )
+ {
+ }
+
+ public void mouseClicked( MouseEvent evt )
+ {
+ }
+ }
+}
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