At university my computer graphic professor Hartmut Schirmacher gave us an excercise to implement various effects on a sphere in webgl with shaders based on his given webgl framework. His framework made it fairly easy though. Well here it is:

The features are:

• Day and night light with smooth transition
• Day changes based on the month
• Moving clouds, which alternate in intensity over time
• Wireframe and equator ring for orientation purposes
• Specular lights based on barythmetic map
• Height based on topyographic map
• Bump map (work in progress)
• Rotate with [Left click]
• Drag with [Shift] + [Left click]
• Zoom with [Alt] + [Left click]

All textures are taken from NASA’s Blue Marble collection.

This is my solution to cg2 exercersise a03.