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true_atlantis
09-05-2005, 08:01 PM
this is my first time trying pick coorelation, when following the directions my book gives me, i get this error...

X Error of failed request: GLXBadContextState
Major opcode of failed request: 143 (GLX)
Minor opcode of failed request: 5 (X_GLXMakeCurrent)
Serial number of failed request: 133
Current serial number in output stream: 133

what im tyring to do is if there is something under the mouse when it is clicked, then i call a function, if there is nothing, then do a popup menu. i know that the reason why im getting this error is because im trying to call the display function (the registered glutDisplayFunc) before the display mode is at GL_RENDER. but if i put the display() after changing modes, the popup menu will not show up. here is my code, can anyone help... thanks


void mouse(int button, int state, int x, int y){
GLuint selectBuf[512];
GLint hits;
GLint viewport[4];

if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN){
glGetIntegerv(GL_VIEWPORT, viewport);

glSelectBuffer(512, selectBuf);
glRenderMode(GL_SELECT);

glInitNames();
glPushName(0);

glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPickMatrix((GLdouble)x, (GLdouble)(viewport[3]-y), 5.0, 5.0, viewport);

//set back to original ORTHO view
glOrtho(0.0,300.0,0.0,300.0,0.0,300.0);
//call registered display function
display();

glMatrixMode(GL_PROJECTION);
glPopMatrix();
glFlush();

//#number of objects under click
hits=glRenderMode(GL_RENDER);

if(hits>0){
//process hits
//#of hits = hits
//vector of hits = selectBuf
cout << "HITS:" << hits << endl;
}
else{
cout << "NOHITS" << endl;
//no hits, display menu
glutCreateMenu(selectObject);
glutAddMenuEntry("Sphere",1);
glutAddMenuEntry("Cube",2);
glutAddMenuEntry("Torus",3);
glutAddMenuEntry("Icosahedron",4);
glutAddMenuEntry("Octahedron",5);
glutAddMenuEntry("Tetrahedron",6);
glutAddMenuEntry("Dodecahedron",7);
glutAddMenuEntry("Cone",8);
glutAddMenuEntry("Teapot",9);
glutAttachMenu(GLUT_LEFT_BUTTON);
glutPostRedisplay();
}
}
}

Hlz
09-06-2005, 09:11 PM
What book is that?

Have you looked at the selection and menu demos? They work.