Graphics Programming - Lighting

This week as part of my graphics programming module i have been implementing different forms of lighting by making use of the vertex and fragment shaders.

Ambient Light

The first type of lighting that i implemented was ambient lighting.

Ambient

This is just a uniform light across the whole scene which does not take into account the direction of the light.

Diffuse Light

The second type of lighting that i added was diffuse lighting.

Diffuse

Diffuse light takes into account the direction of the light and how it interacts with the surface of the object. this allows the objects to appear more 3D and begin to look as though they have depth.

Specular Light

Specular lighting is similar to diffuse light in that it takes into account the direction of the light and how it interacts with the surface of the object but it is also concerned with the position of the viewer which allows it to create highlights on the surface of the object.

Specular

Combined Light

After all 3 were working i combined them together to try and create a more realistic effect. 

Phong Shading

Up until now these lights have been created on the vertex shader, to create the phong shading i had to change my shaders so that all the lighting was calculated on the fragment shader instead. 

Phong

Out of all the light types i have implemented so far the phong shading gives the best effect. and although pretty similar to the combined light it looks a lot better. 

Thanks for reading!

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