Re: Basic OpenGL Transformation 'n Lighting question.

• Subject: Re: Basic OpenGL Transformation 'n Lighting question.
• From: Christopher Henrich <email@hidden>
• Date: Tue, 23 Sep 2003 11:11:45 -0400

i have an opengl scene and single light with the following attributes:

lightAmbient2[] = { 0.5f, 0.5f, 0.5f, 1.0f };
lightDiffuseColor2[] = {1.0, 1.0, 1.0, 1.0};
lightPosition2[] = {1.0, 1.0, 1.0, 1.0};

here is the pseudo code:
lighting is enabled.
pushmatrix().
transformation of object.
i draw a series of triangles into the scene.
popmatrix().

here's my problem:
region A on the group of triangles is illuminated and region B is in shadow.
i rotate the entire group of triangles about the y-axis by 90 degrees.

BUT region A is still the region that is illuminated and region B is in shadow. i'd like the light to be 'stationary' and while the object is transformed lighting on it's surfaces(triangles) changes accordingly.

Thanks,
Aaron.

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