Keyframe Animated Textures

Rendered textures can now be saved to a file using a simple image writing library from http://www.lonesock.net/soil.html.  This takes care of creating Bitmap header info and writing the data from a texture.  It works very well with OpenGL since it uses the same RGBA byte ordering.

Below is the output of 16 keyframes over roughly 30 seconds:

16 keyframes each scaled to 256x256

Unfortunately, attempting to write the texture to file once every second (or ideally once every frame) decreases the frame-rate to a point where it is difficult to interact with the water.  Next I will focus on allocating and rendering to an array of textures and performing all write operations after rendering is complete. Also, the large white alpha areas showing on the rendered textures will have to be coloured/handled differently. The smaller alpha areas actually seem to appear as a reflection which is interesting, but I hope to achieve a better effect using a normal map.