naive-ray-tracing

A naive ray tracing for VR final project

Features

Soft-shadow, transparency, half-transparency and color-bleeding.
Containing Box for speed up.
Gouraud shading, which makes the objects more vivid than flat shading.
OpenMP multi-process for speed up.
GridSurface and ImageSurface.

Requirements

opencv 2.4.2
This project is build under g++ 4.9.
Jsonxx
OptionParse

where Jsonxx is used to load json file decribing the scene and OptionParse is used to handle the project options. And I have already provided the source code in the project.

Usage

make

./ray-tracing input_scene.json output_pic.png [options list]

Here is the option args:

--width = [int] default = 640
--height = [int] default = 480
--distance = default = 10000 where define the distance between the viewpoint and the picture
--epsion = [float] default = 0.01 stop tracing the ray whose intensity reaches or go above that epsion
--soft = [int] default = 0 whether use softshadow, 1 means use and 0 means not use
--radius = [int] default = 4 the radius of the sampling sphere
--ratio = [double] default = 0.75 the sampling rate
--diffuse_num = [int] default = 0 the number of diffused ray, it may cost too much reandering time if too large

You could define the scene yourself in a .json file and here is the options args.

lights have color and point property. Point means the postion of the light source.
objects have Body and GridSurface property. Body is the object loaded from a obj file, GridSurface is the surface instance we use three point to define a plane.

Some specific args you could refer to the example json file teapot.json.

Here is some pictures for display.

Because of the cost of reandering, I am sorry I couldn't render every picture with soft-shadow.

bywbilly/naive-ray-tracing

naive-ray-tracing

Features

Requirements

Usage

Softshadow

transparency, half-transparency

color-bleeding

gouraud shading

ImageSurface

Acknowledgement