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Diffstat (limited to 'dist/Mesa/progs/redbook/stencil.c')
| -rw-r--r-- | dist/Mesa/progs/redbook/stencil.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/dist/Mesa/progs/redbook/stencil.c b/dist/Mesa/progs/redbook/stencil.c deleted file mode 100644 index 5325abf8b..000000000 --- a/dist/Mesa/progs/redbook/stencil.c +++ /dev/null @@ -1,193 +0,0 @@ - -/* Copyright (c) Mark J. Kilgard, 1994. */ - -/* - * (c) Copyright 1993, 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 - * Unpublished-- rights reserved under the copyright laws of the - * United States.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(TM) is a trademark of Silicon Graphics, Inc. - */ -/* stencil.c - * This program draws two rotated tori in a window. - * A diamond in the center of the window masks out part - * of the scene. Within this mask, a different model - * (a sphere) is drawn in a different color. - */ - -/* - * !!! NOTE !!! - * - * This demo is poorly written. The stencil buffer should be - * redrawn in display(), not in the myReshape() function. - * The reason is if the window gets "damaged" then the stencil buffer - * contents will be in an undefined state (myReshape is not called when - * a window is damaged and needs to be redrawn). If the stencil buffer - * contents are undefined, the results of display() are unpredictable. - * - * -Brian - */ - - -#include <stdlib.h> -#include <GL/glut.h> - -#define YELLOWMAT 1 -#define BLUEMAT 2 - -static void myinit (void) -{ - GLfloat yellow_diffuse[] = { 0.7, 0.7, 0.0, 1.0 }; - GLfloat yellow_specular[] = { 1.0, 1.0, 1.0, 1.0 }; - - GLfloat blue_diffuse[] = { 0.1, 0.1, 0.7, 1.0 }; - GLfloat blue_specular[] = { 0.1, 1.0, 1.0, 1.0 }; - - GLfloat position_one[] = { 1.0, 1.0, 1.0, 0.0 }; - - glNewList(YELLOWMAT, GL_COMPILE); - glMaterialfv(GL_FRONT, GL_DIFFUSE, yellow_diffuse); - glMaterialfv(GL_FRONT, GL_SPECULAR, yellow_specular); - glMaterialf(GL_FRONT, GL_SHININESS, 64.0); - glEndList(); - - glNewList(BLUEMAT, GL_COMPILE); - glMaterialfv(GL_FRONT, GL_DIFFUSE, blue_diffuse); - glMaterialfv(GL_FRONT, GL_SPECULAR, blue_specular); - glMaterialf(GL_FRONT, GL_SHININESS, 45.0); - glEndList(); - - glLightfv(GL_LIGHT0, GL_POSITION, position_one); - - glEnable(GL_LIGHT0); - glEnable(GL_LIGHTING); - glDepthFunc(GL_LESS); - glEnable(GL_DEPTH_TEST); - - glClearStencil(0x0); - glEnable(GL_STENCIL_TEST); - -} - -/* Draw a sphere in a diamond-shaped section in the - * middle of a window with 2 tori. - */ -static void display(void) -{ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - glStencilOp (GL_KEEP, GL_KEEP, GL_KEEP); - -/* draw blue sphere where the stencil is 1 */ - glStencilFunc (GL_EQUAL, 0x1, 0x1); - glCallList (BLUEMAT); - glutSolidSphere (0.5, 15, 15); - -/* draw the tori where the stencil is not 1 */ - glStencilFunc (GL_NOTEQUAL, 0x1, 0x1); - glPushMatrix(); - glRotatef (45.0, 0.0, 0.0, 1.0); - glRotatef (45.0, 0.0, 1.0, 0.0); - glCallList (YELLOWMAT); - glutSolidTorus (0.275, 0.85, 15, 15); - glPushMatrix(); - glRotatef (90.0, 1.0, 0.0, 0.0); - glutSolidTorus (0.275, 0.85, 15, 15); - glPopMatrix(); - glPopMatrix(); - - glFlush(); - glutSwapBuffers(); -} - -/* Whenever the window is reshaped, redefine the - * coordinate system and redraw the stencil area. - */ -static void myReshape(int w, int h) -{ - glViewport(0, 0, w, h); - - glClear(GL_STENCIL_BUFFER_BIT); -/* create a diamond shaped stencil area */ - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho(-3.0, 3.0, -3.0, 3.0, -1.0, 1.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - - glStencilFunc (GL_ALWAYS, 0x1, 0x1); - glStencilOp (GL_REPLACE, GL_REPLACE, GL_REPLACE); - glBegin(GL_QUADS); - glVertex3f (-1.0, 0.0, 0.0); - glVertex3f (0.0, 1.0, 0.0); - glVertex3f (1.0, 0.0, 0.0); - glVertex3f (0.0, -1.0, 0.0); - glEnd(); - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluPerspective(45.0, (GLfloat) w/(GLfloat) h, 3.0, 7.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0.0, 0.0, -5.0); -} - -static void -key(unsigned char k, int x, int y) -{ - switch (k) { - case 27: /* Escape */ - exit(0); - break; - default: - return; - } - glutPostRedisplay(); -} - -/* Main Loop - * Open window with initial window size, title bar, - * RGBA display mode, and handle input events. - */ -int main(int argc, char** argv) -{ - glutInit(&argc, argv); - glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_STENCIL); - glutInitWindowSize (400, 400); - glutCreateWindow (argv[0]); - myinit (); - glutReshapeFunc (myReshape); - glutDisplayFunc(display); - glutKeyboardFunc(key); - glutMainLoop(); - return 0; /* ANSI C requires main to return int. */ -} |