Making WorldPlanet Simulation

By Gustav Olsson

Project Goals

Render a planet with terrain

Terrain

Atmospheric scattering in real time

Water

Level of detail Level of deatil on flat ground

Cube to Sphere

Formula

Level of detail Level of deatil on flat ground

Cube to Sphere

Formula

Chunk with 256 quads

Children

Making the terrain possible

Parameters to generate random number

Amplitude, Frequency, Persistence and Octaves

Frequency = 2i

Amplitude = Persistencei

Perlin Noise

Atmospheric Scattering

• Rayliegh Scattering and Mie Scattering

• Small particals in the air, scatter light more heavily at shorter wavelenghts

• Larger particals in the air, scatter all wavelenghts of light equally

A planet with terrain

Results

Terrain with blending textures

Results

Good looking Atmosphere Day and night cycle

Results

Good looking Atmosphere Day and night cycle

Results

Good looking Atmosphere Day and night cycle

Results

Good looking Atmosphere Day and night cycle

Results

Good looking Atmosphere Day and night cycle

Results

Bad implemented level of detail

High Frame drop

Qt do not like release

Problems

Reworked level of detail

Use glew

Solutions

Time estimation is hard and requires practice

Not a one man project

Fun project with okey results

Many improvements can be made

Evalution

Show Demo

Questions?