Hi,
I am trying to draw lines on the screen. And I am trying to use pure openGL to
draw lines.The lines can be drawn on the screen. But I get openGL error 'stack
overflow' at after RenderBin::draw(..) message. My code is below:
Code:
void draw::drawImplementation(osg::RenderInfo& renderInfo) const
{
Viewport* viewPort =
renderInfo.getCurrentCamera()->getViewport();
double width = viewPort->width();
double height = viewPort->height();
double orgX = width / 2;
double orgY = height / 2;
osg::Quat matrix =
renderInfo.getCurrentCamera()->getViewMatrix().getRotate();
glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0, width, 0.0, height, -1, 1);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glTranslated(orgX, orgY, 0);
glRotated(rotate, 0, 0, 1);
glTranslated(-orgX, -orgY, 0);
glLineWidth(2.0f);
glColor4d(0, 255, 0, 255);
glBegin(GL_LINES);
if (orgY < height && orgY > 0) {
glVertex2d(orgX + 25, orgY);
glVertex2d(orgX + 260, orgY);
glVertex2d(orgX - 25, orgY);
glVertex2d(orgX - 260, orgY);
}
glEnd();
glLineWidth(5.0f);
glColor4d(0, 0, 0, 255);
glBegin(GL_LINES);
if (orgY < height && orgY > 0) {
glVertex2d(orgX + 23, orgY);
glVertex2d(orgX + 262, orgY);
glVertex2d(orgX - 23, orgY);
glVertex2d(orgX - 262, orgY);
}
glEnd();
glLineWidth(2.0f);
glColor4d(0, 255, 0, 255);
glBegin(GL_LINES);
int yLoc = orgY + 250;
for (int i = 0; i < 17; i++) {
if (yLoc < height && yLoc > 0) {
glVertex2d(orgX + 25, yLoc);
glVertex2d(orgX + 165, yLoc);
glVertex2d(orgX - 25, yLoc);
glVertex2d(orgX - 165, yLoc);
glVertex2d(orgX - 165, yLoc);
glVertex2d(orgX - 165, yLoc - 20);
glVertex2d(orgX + 165, yLoc);
glVertex2d(orgX + 165, yLoc - 20);
}
yLoc = yLoc + 250;
}
glEnd();
glLineWidth(5.0f);
glColor4d(0, 0, 0, 255);
glBegin(GL_LINES);
yLoc = (int)orgY + 250;
for (int i = 0; i < 17; i++) {
if (yLoc < height && yLoc > 0) {
glVertex2d(orgX + 23, yLoc);
glVertex2d(orgX + 165, yLoc);
glVertex2d(orgX - 23, yLoc);
glVertex2d(orgX - 165, yLoc);
glVertex2d(orgX - 165, yLoc);
glVertex2d(orgX - 165, yLoc - 22);
glVertex2d(orgX + 165, yLoc);
glVertex2d(orgX + 165, yLoc - 22);
}
yLoc = yLoc + 250;
}
glEnd();
}
Thank you!
Cheers,
Nebi[/code]
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=75339#75339
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
