- Cramer's rule for computing triangle intersections
- OpenMP parallelism
- Glossy surfaces are modeled using Phong light
- Point light
- Anti-aliasing and soft shadows by shooting slightly perturbed rays each time
- Point lights are replaced by emissive surfaces
- The color values can sometimes be higher than
vec3(1,1,1), which means they are clipped when passed toPutPixelSDL. To convert the colors from HDR to LDR we experimented with different tone mapping and gamma correction methods.
- The amount of light reflected when light enters another medium is computed using Schlick's approximation for Fresnel's equations
- Total internal refraction
- Beer’s law models light being absorbed over distance as it travels through a transparent material. The extinction (absorption) describes how much of each colour channel absorbs over distance. For example, a value of
(8.0, 2.0, 0.1)would make red get absorbed the fastest, then green, then blue, so would result in a blueish, slightly green color object. The first picture shows a fully transparent object, while the second cube has a refraction index of1.52.
- Based on the distance travelled by a ray and on the height
- Used barycentric coordinates
- Box without AA
- Box with AA
