Hello, I have been looking for an answer to my problem round the web and I couldnt find it yet. The problem is that I switch to selection mode, and I draw my targets (objects to pick), everything works ok but... If I move the camera it doesnt work!.... (I can pick where there are no objects, etc)... plz help me, I paste some code: =========================================================== CODE START :: pick(int x, int y) =========================================================== if(!Landscape.IsLoaded()) return; GLuint buffer[512]; // Set Up A Selection Buffer GLint hits; // The Number Of Objects That We Selected GLint viewport[4]; glGetIntegerv(GL_VIEWPORT, viewport); glSelectBuffer(512, buffer); glRenderMode(GL_SELECT); glInitNames(); glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity(); gluPickMatrix((GLdouble) x, (GLdouble) (viewport[3]-y), 1.0f, 1.0f, viewport); gluPerspective(45.0f, (GLfloat) (viewport[2]-viewport[0])/(GLfloat) (viewport[3]-viewport[1]), 0.1f, 300.0f); // draw glMatrixMode(GL_MODELVIEW); // look trough camera Camera.Look(); Landscape.Render(); // Select & Pop glMatrixMode(GL_PROJECTION); glPopMatrix(); // Set render mode glMatrixMode(GL_MODELVIEW); hits = glRenderMode(GL_RENDER); if(hits) MessageBox(NULL,"I''m hit!",NULL,0); =========================================================== CODE END =========================================================== Where is the error... help!! Lords of Genesis | 3D Online RPG in development http://www.lordsofgenesis.tk

Does Render assign a name for each object?

Cause you selection buffer looks local.

[edited by - bgcjr on February 18, 2003 9:38:10 AM]

The buffer is local, and the names are pushed and popped in the Landscape.Render() function.
I''m not checking for the pushed name, I''m just checking if there was a hit or not, and I get hits even when I dont click in an object.

PS: I added glLoadIdentity() after
// draw
glMatrixMode(GL_MODELVIEW);
and it works a little better now, but it doesnt work ok yet.

Lords of Genesis | 3D Online RPG in development
http://www.lordsofgenesis.tk

Don''t call gluLookAt() when doing the picking. Just call it when you render normaly. E.g:

Camera.Look();Landscape.Render();pick(); 

And in pick(), remove the Camera.Look(). That should work, at least it did for me (although I didn''t render a landscape).

My normal render routine includes gluLookAt(), its inside camera.look()..

it still doesnt work.

Lords of Genesis | 3D Online RPG in development
http://www.lordsofgenesis.tk