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Thread: Lighting -> verry fuzzy spotlight

  1. #1
    Junior Member Newbie
    Join Date
    Apr 2002
    The Netherlands

    Lighting -> verry fuzzy spotlight

    Hi, i'm a Student diong an internship, i have a research assignment where the goal is to make a OpenGL 3D reprisentation of 2D MRI scanner data.

    I am at the point that i have the model and all, but since the reprisentation is a hart chamber (left ventrikular) it's in 1 color. The single color prevented seing depth, so i started working with lighting.

    I have ambient light (works fine), and a stationary spotlight to create a shade in order to get depth. This works good but when i rotate the object arround the x or y axis then i see that the other side does not get illuminated even though the light is shining directly on it. It does however work with rotations arround the Z axis (unless already dark).

    An example from another company of this viewing module can be found here :

    The bands of the model are made up out of triangle strips and fan's. and i do not use culling or resize or anything like that that could invalidate the normals.

    Plz help me,.. i tried everything.
    I can't find a solution

  2. #2
    Junior Member Newbie
    Join Date
    Mar 2002

    Re: Lighting -> verry fuzzy spotlight

    My guess is that you are not rotating the light with your scene correctly. It may help to draw a box where your light is so you can make sure the light is pointing where you think it is.

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