mouse to 3d

jaba · 2003-09-06T14:40:20

Hello, my question is How to transform mouse coordinates to 3d object coordinates?. I need to select a vertex of a mesh with the mouse. I am trying with gluUnProject, but this function returns a point of the infinite line that passes through the point, that you has clicked, and the eye of the camera. This is correct? I dot this: gluUnproject(mouse.x, mouse.y, 0.5, modelMat, projMat, viewport, &obX, &obY, &obZ); gluUnproject(mouse.x, mouse.y, 1.0, modelMat, projMat, viewport, &ob2X, &ob2Y, &ob2Z); whit this I suposse that I have two points of the infinite line. And now what? Plase help me and sorry for my english

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Started by jaba September 02, 2003 05:52 AM

10 comments, last by jaba 20 years, 7 months ago

jaba

122

Author

September 06, 2003 10:50 AM

Thank you Lukerd for your tutorial, you have solved my problem, but when the model is renderized with lines your method doesn''t works, because you must click exactly over the lines due to the z-buffer. Any idea?

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Lukerd

122

September 06, 2003 02:40 PM

Hmm, i''m not sure, maybe you could try something like this...

RenderSolid();
GetOGLPos();
glClearBuffers();
RenderWire();
SwapBuffers();

It does mean making 2 passes tho, and I havent tried it.

Hyperdev

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