Our next task is to build a Skybox sometimes refered to as an evironment map or a cub map.
The idea is that a cube could be created where all six faces had a texture assigned to it.
The camera, or eye, is still at the origin looking down the negative z-axis, if the cube is a 1x1x1, centered at the origin,
Wait! A better plan is to check out at this web page skybox
The code won't work for us, but the basics are mostly all there.
In class we started to build a new class called SkyBox and passed in the six const char* filenames
for each of the six faces. Next, I looked at the code we built in GAME157 class and lifted some it.
It looked something like this:
Finish this function by adding the filters:
The shaders are just too easy. We build them in class, or figure them out by looking
at the learnOpenGL website. Don't just copy his shaders, you'll need to modernize them but
the idea is still there.
The next problem is where to put all this code. I argued that the skybox is just the backdrop
to the camera. No one made any other suggestion so I put the SkyBox code in the Camera class.
I gave you the code we (almost) finished in class in the Helpful tools box. Now this has solved and
created some issues.
I put a trackball in the Camera class (go ahead and remove the other one from the Scene) this
this will generate a rotation quaternion used to set the camera's orientation. I can build a standard
viewMatrix with "return MMath::toMatrix4(orientation) * MMath::translate(position);" For the skybox,
I don't want the translation so I created another getter for just the orientation. See my comments
in the Camera.cpp file.
All that is left to do is bind the textures and draw.
I bet you can do it from here. Use the underwater data or the CN_Tower data to make sure your images
are loaded in the right sequence.
I also gave you a submarine and its texture just for fun.
