[WIP] Added the simplex sampler to opengl water shader
[WIP] Use simple normal map for opengl water
Added skybox reflection to water shader
Water is now always at y=0.0
Refactored noise shader
Replaced NoiseGenerator by NoiseState in WaterDefinition
opengl: Fixed artifacts on water reflection
Fixed build for windows systems
Merge branch 'master' into water_shader
Fixed some unit tests issues
Merge branch 'master' into vegetation
Added recursive branches generation
Small fixes on vegetation preview
Added Sphere class and intersection with ray
vegetation: Added basic foliage groups
Added InfinitePlane object, with ray intersection
Added Disk object and ray intersection
vegetation: Using Disk to make basic leafs [WIP]