3D OpenGL Engine Demo

Fractal terrain rendering – Interactive 3D Environment

Languages: C++, GLSL

API: OpenGL 3.3

Tool and resources: GLFW, GLEW, Assimp, GLM

Rendering techniques:

     1)      Terrain rendering

                        Fractal generated terrain

                                      Tri-planar texturing

                                      Distance based texture level of detail

     2)      Water rendering

                       Normal mapping

                        Displacement mapping

     3)      Sky and clouds rendering

                                     Gradient sky dome

                        Parallax scrolling

Key characteristics:

•       Environment

•       Free first person navigation

•       Third person navigation

•       Quad-tree for fast terrain frustum culling

•       Fractal terrain

•       Procedurally generated terrain based on parameters: size, roughness and height scale

•       Adjustable level of detail based on the number of iterations in the generation algorithm

•       Unique terrain shape

Screenshots:

1. Terrain

        Roughness=1.0                             

        Height scale=1.5

        Iterations=11

        Roughness=1.0

  Height scale=1.5

  Iterations=7

         Roughness=0.8

   Heightscale=2.5

   Iterations=11

         Roughness=1.3

    Heightscale=1.3

    Iterations=10

- Texturing level of detail based on the distance to the camera
- Tri-planar texturing to solve the issues when texturing high slope terrain

High-slope terrain:

    - Texture level of detail - Far

    - low-detail texture

       

    - Texture level of detail - Near

    - high-detail texture

2. Water

• Two displacement maps
• Two normal maps
• Per-pixel lighting
• Effect of moving water with adjustable waves in terms of speed and scale

High level of displacement

Low level of displacement

3.  Skydome

      Parallax scrolling clouds: Two layer of dynamic clouds moving at different speeds to create the illusion of depth.

     Gradient skydome: interpolates between the horizon color and the top color of the skydome based on the local height of the sphere model

Demo: Youtube Demo