Hi,
I am dealing with a 3d texture, colored using a fragment shader. I need to add a diffuse light effect. Should this be done using a light source or in the fragment shader?
P.S.
I tried to create a light source as follows but it did not give any effect
LightAmbient : array[0..3] of GLfloat=( 0.5, 0.5, 0.5, 1);
LightDiffuse : array[0..3] of GLfloat=( 1.0, 1.0, 1.0, 1);
LightPosition : array[0..3] of GLfloat= ( 0.0, 0.0, 2.0, 0.0);
glLightfv(GL_LIGHT1, GL_AMBIENT, @LightAmbient);
glLightfv(GL_LIGHT1, GL_DIFFUSE, @LightDiffuse);
glLightfv(GL_LIGHT1, GL_POSITION,@LightPosition);
glEnable(GL_LIGHT1);
// draw texture
glEnable(GL_LIGHTING);
Thanks