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ym
08-23-2001, 11:29 AM
I approximated ribbon by using a lot of polygons, and i used flat shading, i.e I calculate the the normal for every tiny polygons. My problem is one side of the ribbon looks ok, and if i twist the ribbon, i saw the other side, the other side looks too dark, as a matter of fact, I want the other side looks darker, but not too dark, what's the problem?

zoldar256
08-23-2001, 11:46 AM
Set your ambient light level higher.
For example:

static const GLfloat c3dPropertiesAmbient [] = {0.50, 0.50, 0.50, 1.00};
glLightfv( GL_LIGHT0, GL_AMBIENT, c3dPropertiesAmbient);

[This message has been edited by zoldar256 (edited 08-23-2001).]

no-one
08-23-2001, 02:56 PM
are you applying lighting calculations to boths sides of the polygons?