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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 * Unpublished-- rights reserved under the copyright laws of the * United States.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. */ /* * varray.c * This program demonstrates vertex arrays. */ #include <GL/glut.h> #include <stdio.h> #include <stdlib.h> #ifdef GL_VERSION_1_1 #define POINTER 1 #define INTERLEAVED 2 #define DRAWARRAY 1 #define ARRAYELEMENT 2 #define DRAWELEMENTS 3 int setupMethod = POINTER; int derefMethod = DRAWARRAY; static void setupPointers(void) { static GLint vertices[] = {25, 25, 100, 325, 175, 25, 175, 325, 250, 25, 325, 325}; static GLfloat colors[] = {1.0, 0.2, 0.2, 0.2, 0.2, 1.0, 0.8, 1.0, 0.2, 0.75, 0.75, 0.75, 0.35, 0.35, 0.35, 0.5, 0.5, 0.5}; glEnableClientState (GL_VERTEX_ARRAY); glEnableClientState (GL_COLOR_ARRAY); glVertexPointer (2, GL_INT, 0, vertices); glColorPointer (3, GL_FLOAT, 0, colors); } static void setupInterleave(void) { static GLfloat intertwined[] = {1.0, 0.2, 1.0, 100.0, 100.0, 0.0, 1.0, 0.2, 0.2, 0.0, 200.0, 0.0, 1.0, 1.0, 0.2, 100.0, 300.0, 0.0, 0.2, 1.0, 0.2, 200.0, 300.0, 0.0, 0.2, 1.0, 1.0, 300.0, 200.0, 0.0, 0.2, 0.2, 1.0, 200.0, 100.0, 0.0}; glInterleavedArrays (GL_C3F_V3F, 0, intertwined); } static void init(void) { glClearColor (0.0, 0.0, 0.0, 0.0); glShadeModel (GL_SMOOTH); setupPointers (); } static void display(void) { glClear (GL_COLOR_BUFFER_BIT); if (derefMethod == DRAWARRAY) glDrawArrays (GL_TRIANGLES, 0, 6); else if (derefMethod == ARRAYELEMENT) { glBegin (GL_TRIANGLES); glArrayElement (2); glArrayElement (3); glArrayElement (5); glEnd (); } else if (derefMethod == DRAWELEMENTS) { GLuint indices[4] = {0, 1, 3, 4}; glDrawElements (GL_POLYGON, 4, GL_UNSIGNED_INT, indices); } glFlush (); } static void reshape (int w, int h) { glViewport (0, 0, (GLsizei) w, (GLsizei) h); glMatrixMode (GL_PROJECTION); glLoadIdentity (); gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h); } /* ARGSUSED2 */ static void mouse (int button, int state, int x, int y) { switch (button) { case GLUT_LEFT_BUTTON: if (state == GLUT_DOWN) { if (setupMethod == POINTER) { setupMethod = INTERLEAVED; setupInterleave(); } else if (setupMethod == INTERLEAVED) { setupMethod = POINTER; setupPointers(); } glutPostRedisplay(); } break; case GLUT_MIDDLE_BUTTON: case GLUT_RIGHT_BUTTON: if (state == GLUT_DOWN) { if (derefMethod == DRAWARRAY) derefMethod = ARRAYELEMENT; else if (derefMethod == ARRAYELEMENT) derefMethod = DRAWELEMENTS; else if (derefMethod == DRAWELEMENTS) derefMethod = DRAWARRAY; glutPostRedisplay(); } break; default: break; } } /* ARGSUSED1 */ static void keyboard(unsigned char key, int x, int y) { switch (key) { case 27: exit(0); break; } } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); glutInitWindowSize (350, 350); glutInitWindowPosition (100, 100); glutCreateWindow (argv[0]); init (); glutDisplayFunc(display); glutReshapeFunc(reshape); glutMouseFunc(mouse); glutKeyboardFunc (keyboard); glutMainLoop(); return 0; } #else int main(int argc, char** argv) { fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0.\n"); fprintf (stderr, "If your implementation of OpenGL Version 1.0 has the right extensions,\n"); fprintf (stderr, "you may be able to modify this program to make it run.\n"); return 0; } #endif