From 880653d31a8f1ff8384fdbc75b84934bceecfdb8 Mon Sep 17 00:00:00 2001 From: Sven Gothel Date: Sat, 18 Nov 2000 06:43:49 +0000 Subject: Initial revision --- demos/RonsDemos/texgen.java | 478 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 478 insertions(+) create mode 100644 demos/RonsDemos/texgen.java (limited to 'demos/RonsDemos/texgen.java') diff --git a/demos/RonsDemos/texgen.java b/demos/RonsDemos/texgen.java new file mode 100644 index 0000000..bbc3288 --- /dev/null +++ b/demos/RonsDemos/texgen.java @@ -0,0 +1,478 @@ +/** + * @(#) texgen.java + * @(#) author: Silicon Graphics, Inc. (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 + * Unpublished-- rights reserved under the copyright laws of the + * United States.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. + */ + +/* This program draws a texture mapped teapot with + * automatically generated texture coordinates. The + * texture is rendered as stripes on the teapot. + * Initially, the object is drawn with texture coordinates + * based upon the object coordinates of the vertex + * and distance from the plane x = 0. Pressing the 'e' + * key changes the coordinate generation to eye coordinates + * of the vertex. Pressing the 'o' key switches it back + * to the object coordinates. Pressing the 's' key + * changes the plane to a slanted one (x + y + z = 0). + * Pressing the 'x' key switches it back to x = 0. + */ + +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 texgen extends Applet +{ + // Data for drawing teapots: + /* Rim, body, lid, and bottom data must be reflected in x and + y; handle and spout data across the y axis only. */ + private static final int patchdata[][] = + { + /* rim */ + {102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, + 12, 13, 14, 15}, + /* body */ + {12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, + 24, 25, 26, 27}, + {24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, + 37, 38, 39, 40}, + /* lid */ + {96, 96, 96, 96, 97, 98, 99, 100, 101, 101, 101, + 101, 0, 1, 2, 3,}, + {0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, + 113, 114, 115, 116, 117}, + /* bottom */ + {118, 118, 118, 118, 124, 122, 119, 121, 123, 126, + 125, 120, 40, 39, 38, 37}, + /* handle */ + {41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, + 53, 54, 55, 56}, + {53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, + 28, 65, 66, 67}, + /* spout */ + {68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83}, + {80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, + 92, 93, 94, 95} + }; + private static final float cpdata[][] = + { + {0.2f, 0.0f, 2.7f}, {0.2f, -0.112f, 2.7f}, {0.112f, -0.2f, 2.7f}, {0.0f, + -0.2f, 2.7f}, {1.3375f, 0.0f, 2.53125f}, {1.3375f, -0.749f, 2.53125f}, + {0.749f, -1.3375f, 2.53125f}, {0.0f, -1.3375f, 2.53125f}, {1.4375f, + 0.0f, 2.53125f}, {1.4375f, -0.805f, 2.53125f}, {0.805f, -1.4375f, + 2.53125f}, {0.0f, -1.4375f, 2.53125f}, {1.5f, 0.0f, 2.4f}, {1.5f, -0.84f, + 2.4f}, {0.84f, -1.5f, 2.4f}, {0.0f, -1.5f, 2.4f}, {1.75f, 0.0f, 1.875f}, + {1.75f, -0.98f, 1.875f}, {0.98f, -1.75f, 1.875f}, {0.0f, -1.75f, + 1.875f}, {2f, 0.0f, 1.35f}, {2f, -1.12f, 1.35f}, {1.12f, -2f, 1.35f}, + {0.0f, -2f, 1.35f}, {2f, 0.0f, 0.9f}, {2f, -1.12f, 0.9f}, {1.12f, -2f, + 0.9f}, {0.0f, -2f, 0.9f}, {-2f, 0.0f, 0.9f}, {2f, 0.0f, 0.45f}, {2f, -1.12f, + 0.45f}, {1.12f, -2f, 0.45f}, {0.0f, -2f, 0.45f}, {1.5f, 0.0f, 0.225f}, + {1.5f, -0.84f, 0.225f}, {0.84f, -1.5f, 0.225f}, {0.0f, -1.5f, 0.225f}, + {1.5f, 0.0f, 0.15f}, {1.5f, -0.84f, 0.15f}, {0.84f, -1.5f, 0.15f}, {0.0f, + -1.5f, 0.15f}, {-1.6f, 0.0f, 2.025f}, {-1.6f, -0.3f, 2.025f}, {-1.5f, + -0.3f, 2.25f}, {-1.5f, 0.0f, 2.25f}, {-2.3f, 0.0f, 2.025f}, {-2.3f, -0.3f, + 2.025f}, {-2.5f, -0.3f, 2.25f}, {-2.5f, 0.0f, 2.25f}, {-2.7f, 0.0f, + 2.025f}, {-2.7f, -0.3f, 2.025f}, {-3f, -0.3f, 2.25f}, {-3f, 0.0f, + 2.25f}, {-2.7f, 0.0f, 1.8f}, {-2.7f, -0.3f, 1.8f}, {-3f, -0.3f, 1.8f}, + {-3f, 0.0f, 1.8f}, {-2.7f, 0.0f, 1.575f}, {-2.7f, -0.3f, 1.575f}, {-3f, + -0.3f, 1.35f}, {-3f, 0.0f, 1.35f}, {-2.5f, 0.0f, 1.125f}, {-2.5f, -0.3f, + 1.125f}, {-2.65f, -0.3f, 0.9375f}, {-2.65f, 0.0f, 0.9375f}, {-2f, + -0.3f, 0.9f}, {-1.9f, -0.3f, 0.6f}, {-1.9f, 0.0f, 0.6f}, {1.7f, 0.0f, + 1.425f}, {1.7f, -0.66f, 1.425f}, {1.7f, -0.66f, 0.6f}, {1.7f, 0.0f, + 0.6f}, {2.6f, 0.0f, 1.425f}, {2.6f, -0.66f, 1.425f}, {3.1f, -0.66f, + 0.825f}, {3.1f, 0.0f, 0.825f}, {2.3f, 0.0f, 2.1f}, {2.3f, -0.25f, 2.1f}, + {2.4f, -0.25f, 2.025f}, {2.4f, 0.0f, 2.025f}, {2.7f, 0.0f, 2.4f}, {2.7f, + -0.25f, 2.4f}, {3.3f, -0.25f, 2.4f}, {3.3f, 0.0f, 2.4f}, {2.8f, 0.0f, + 2.475f}, {2.8f, -0.25f, 2.475f}, {3.525f, -0.25f, 2.49375f}, + {3.525f, 0.0f, 2.49375f}, {2.9f, 0.0f, 2.475f}, {2.9f, -0.15f, 2.475f}, + {3.45f, -0.15f, 2.5125f}, {3.45f, 0.0f, 2.5125f}, {2.8f, 0.0f, 2.4f}, + {2.8f, -0.15f, 2.4f}, {3.2f, -0.15f, 2.4f}, {3.2f, 0.0f, 2.4f}, {0.0f, 0.0f, + 3.15f}, {0.8f, 0.0f, 3.15f}, {0.8f, -0.45f, 3.15f}, {0.45f, -0.8f, + 3.15f}, {0.0f, -0.8f, 3.15f}, {0.0f, 0.0f, 2.85f}, {1.4f, 0.0f, 2.4f}, {1.4f, + -0.784f, 2.4f}, {0.784f, -1.4f, 2.4f}, {0.0f, -1.4f, 2.4f}, {0.4f, 0.0f, + 2.55f}, {0.4f, -0.224f, 2.55f}, {0.224f, -0.4f, 2.55f}, {0.0f, -0.4f, + 2.55f}, {1.3f, 0.0f, 2.55f}, {1.3f, -0.728f, 2.55f}, {0.728f, -1.3f, + 2.55f}, {0.0f, -1.3f, 2.55f}, {1.3f, 0.0f, 2.4f}, {1.3f, -0.728f, 2.4f}, + {0.728f, -1.3f, 2.4f}, {0.0f, -1.3f, 2.4f}, {0.0f, 0.0f, 0.0f}, {1.425f, + -0.798f, 0.0f}, {1.5f, 0.0f, 0.075f}, {1.425f, 0.0f, 0.0f}, {0.798f, -1.425f, + 0.0f}, {0.0f, -1.5f, 0.075f}, {0.0f, -1.425f, 0.0f}, {1.5f, -0.84f, 0.075f}, + {0.84f, -1.5f, 0.075f} + }; + private static final float tex[] = + { + 0.0f, 0.0f, + 1.0f, 0.0f, + 0.0f, 1.0f, + 1.0f, 1.0f + }; + + texgenCanvas canvas = null; + + + /* Initialize the applet */ + + + public void init() + { + Dimension d = getSize(); + setLayout(new BorderLayout()); + canvas = new texgenCanvas(d.width, d.height); + canvas.requestFocus(); + add("Center", canvas); + } + + + /* Start the applet */ + + + public void start() + { + } + + + /* Stop the applet */ + + + public void stop() + { + } + + + + + /* Local GLCanvas extension class */ + + + private class texgenCanvas extends GLCanvas + implements KeyListener, MouseListener + { + private static final int stripeImageWidth = 32; + private byte stripeImage[] = new byte[4*stripeImageWidth]; + private int texName; + + /* planes for texture coordinate generation */ + private float xequalzero[] = {1.0f, 0.0f, 0.0f, 0.0f}; + private float slanted[] = {1.0f, 1.0f, 1.0f, 0.0f}; + private float currentCoeff[]; + private int currentPlane; + private int currentGenMode; + + public texgenCanvas(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.glEnable(GL_DEPTH_TEST); + gl.glShadeModel(GL_SMOOTH); + + makeStripeImage(); + gl.glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + int tnbuf[] = new int[1]; + gl.glGenTextures(1, tnbuf); + texName = tnbuf[0]; + gl.glBindTexture(GL_TEXTURE_1D, texName); + gl.glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_REPEAT); + gl.glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + gl.glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + gl.glTexImage1D + (GL_TEXTURE_1D, + 0, + GL_RGBA, + stripeImageWidth, + 0, + GL_RGBA, + GL_UNSIGNED_BYTE, + stripeImage); + gl.glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); + currentCoeff = xequalzero; + currentGenMode = GL_OBJECT_LINEAR; + currentPlane = GL_OBJECT_PLANE; + gl.glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, currentGenMode); + gl.glTexGenfv(GL_S, currentPlane, currentCoeff); + + gl.glEnable(GL_TEXTURE_GEN_S); + gl.glEnable(GL_TEXTURE_1D); + gl.glEnable(GL_CULL_FACE); + gl.glEnable(GL_LIGHTING); + gl.glEnable(GL_LIGHT0); + gl.glEnable(GL_AUTO_NORMAL); + gl.glEnable(GL_NORMALIZE); + gl.glFrontFace(GL_CW); + gl.glCullFace(GL_BACK); + gl.glMaterialf(GL_FRONT, GL_SHININESS, 64.0f); + + glj.gljCheckGL(); + + addKeyListener(this); + addMouseListener(this); + } + + public void cvsDispose() + { + System.out.println("destroy(): " + this); + removeKeyListener(this); + super.cvsDispose(); + } + + public void reshape(int width, int height) + { + gl.glViewport(0,0,width,height); + gl.glMatrixMode(GL_PROJECTION); + gl.glLoadIdentity(); + if (width <= height) + gl.glOrtho + (-3.5f,3.5f,-3.5f*(float)height/(float)width, + 3.5f*(float)height/(float)width,-3.5f,3.5f); + else + gl.glOrtho + (-3.5f*(float)width/(float)height, + 3.5f*(float)width/(float)height,-3.5f,3.5f,-3.5f,3.5f); + gl.glMatrixMode(GL_MODELVIEW); + gl.glLoadIdentity(); + gl.glMatrixMode(GL_PROJECTION); + gl.glLoadIdentity(); + if (width <= height) + gl.glOrtho + (-3.5f,3.5f,-3.5f*(float)height/(float)width, + 3.5f*(float)height/(float)width,-3.5f,3.5f); + else + gl.glOrtho + (-3.5f*(float)width/(float)height, + 3.5f*(float)width/(float)height,-3.5f,3.5f,-3.5f,3.5f); + gl.glMatrixMode(GL_MODELVIEW); + gl.glLoadIdentity(); + } + + public void display() + { + if (glj.gljMakeCurrent() == false) return; + + gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + gl.glPushMatrix (); + gl.glRotatef(45.0f, 0.0f, 0.0f, 1.0f); + gl.glBindTexture(GL_TEXTURE_1D, texName); + glutSolidTeapot(2.0f); + gl.glPopMatrix(); + gl.glFlush(); + + glj.gljSwap(); + glj.gljCheckGL(); + glj.gljFree(); + } + + // Methods required for the implementation of KeyListener + public void keyPressed(KeyEvent e) + { + } + + public void keyReleased(KeyEvent e) + { + } + + public void keyTyped(KeyEvent e) + { + if (glj.gljMakeCurrent() == false) return; + boolean dorepaint = false; + switch ((char)e.getKeyChar()) + { + case 'e': + case 'E': + currentGenMode = GL_EYE_LINEAR; + currentPlane = GL_EYE_PLANE; + gl.glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, currentGenMode); + gl.glTexGenfv(GL_S, currentPlane, currentCoeff); + dorepaint = true; + break; + case 'o': + case 'O': + currentGenMode = GL_OBJECT_LINEAR; + currentPlane = GL_OBJECT_PLANE; + gl.glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, currentGenMode); + gl.glTexGenfv(GL_S, currentPlane, currentCoeff); + dorepaint = true; + break; + case 's': + case 'S': + currentCoeff = slanted; + gl.glTexGenfv(GL_S, currentPlane, currentCoeff); + dorepaint = true; + break; + case 'x': + case 'X': + currentCoeff = xequalzero; + gl.glTexGenfv(GL_S, currentPlane, currentCoeff); + dorepaint = true; + break; + } + glj.gljFree(); + if (dorepaint) repaint(); + } + + private void makeStripeImage() + { + for (int j = 0; j < stripeImageWidth; j++) + { + stripeImage[4*j] = (byte)((j<=4) ? 255 : 0); + stripeImage[4*j+1] = (byte)((j>4) ? 255 : 0); + stripeImage[4*j+2] = (byte)0; + stripeImage[4*j+3] = (byte)255; + } + } + + // Imported from glut. + private void glutSolidTeapot(double scale) + { + teapot(14, scale, GL_FILL); + } + + // Imported from glut. + private void teapot(int grid, double scale, int type) + { + float p[] = new float[4*4*3]; + float q[] = new float[4*4*3]; + float r[] = new float[4*4*3]; + float s[] = new float[4*4*3]; + float sc = (float)(0.5*scale); + + gl.glPushAttrib(GL_ENABLE_BIT | GL_EVAL_BIT); + gl.glEnable(GL_AUTO_NORMAL); + gl.glEnable(GL_NORMALIZE); + gl.glEnable(GL_MAP2_VERTEX_3); + gl.glEnable(GL_MAP2_TEXTURE_COORD_2); + gl.glPushMatrix(); + gl.glRotatef(270.0f, 1.0f, 0.0f, 0.0f); + gl.glScalef(sc, sc, sc); + gl.glTranslatef(0.0f, 0.0f, -1.5f); + for (int i = 0; i < 10; i++) + { + for (int j = 0; j < 4; j++) + { + for (int k = 0; k < 4; k++) + { + for (int l = 0; l < 3; l++) + { + p[(j*12)+(k*3)+l] = cpdata[patchdata[i][j * 4 + k]][l]; + q[(j*12)+(k*3)+l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l]; + if (l == 1) + q[(j*12)+(k*3)+l] *= -1.0f; + if (i < 6) + { + r[(j*12)+(k*3)+l] = + cpdata[patchdata[i][j * 4 + (3 - k)]][l]; + if (l == 0) + r[(j*12)+(k*3)+l] *= -1.0f; + s[(j*12)+(k*3)+l] = + cpdata[patchdata[i][j * 4 + k]][l]; + if (l == 0) + s[(j*12)+(k*3)+l] *= -1.0f; + if (l == 1) + s[(j*12)+(k*3)+l] *= -1.0f; + } + } + } + } + gl.glMap2f + (GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2, tex); + gl.glMap2f + (GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, p); + gl.glMapGrid2f(grid, 0.0f, 1.0f, grid, 0.0f, 1.0f); + gl.glEvalMesh2(type, 0, grid, 0, grid); + gl.glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, q); + gl.glEvalMesh2(type, 0, grid, 0, grid); + if (i < 6) + { + gl.glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, r); + gl.glEvalMesh2(type, 0, grid, 0, grid); + gl.glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, s); + gl.glEvalMesh2(type, 0, grid, 0, grid); + } + } + gl.glPopMatrix(); + gl.glPopAttrib(); + } + + // Methods required for the implementation of MouseListener + public void mouseEntered( MouseEvent evt ) + { + Component comp = evt.getComponent(); + if( comp.equals(this ) ) + { + requestFocus(); + } + } + + public void mouseExited( MouseEvent evt ) + { } + public void mousePressed( MouseEvent evt ) + { } + public void mouseReleased( MouseEvent evt ) + { } + public void mouseClicked( MouseEvent evt ) + { + Component comp = evt.getComponent(); + if( comp.equals(this ) ) + { + requestFocus(); + } + } + } +} -- cgit v1.2.3