Raytracing - UV Mapping and Texturing

Chapter 3 and Chapter 5 study note of Ray Tracing: the Next Week. (Chapter 4 covered in previous post about Perlin Noise.) Implemented functionalities for generic solid texture and image texture mapping. Texture A texture in graphics is basically a function that makes the colors on a surface procedural. This procedure can be: synthesis co... Read more 12 Apr 2019 - 8 minute read

Exploring Interaction Effect in VR

In VR development, because the motion of the first person character is precisely mapping the real players’ body(mainly hands) movement, the environment collision will never be able to prevent the player model from intersecting with the surrounding meshed. This is a well-accepted limitation of VR technique, however I personally feel it is a bi... Read more 15 Mar 2019 - 5 minute read

Perlin Noise Implementation

Study of raytracing has been progressing into the second book Ray Tracing: the Next Week, which is a little bit more advanced. This post is going to focus on some notes about Perlin Noise implementation. Book Implementation Debug 50 shades of perlin noise... pic.twitter.com/IIWrVVsPAV— ビクター (@viclw17) December 21, 2018 Follow the bo... Read more 28 Dec 2018 - 6 minute read

Camera Model Summary

During my study of raytracing and browsing on Shadertoy, I have seen lots of different ways of implementing camera models for final rendering. Here is my summary for most of the solutions. Camera Model in Raytracing in One Weekend The previous post Raytracing - Camera and Multisampling Antialiasing documented the simplest camera setup for ra... Read more 09 Dec 2018 - 5 minute read

Raymarching and Raytracing Algorithm

Shadertoy is an amazing place to see all sorts of creative shader demos and get inspired. I noticed that most of the shaders there that depict certain 3D geometries - simple or extremely complex - are drawn using raymarching algorithm. At first the algorithm sounds kind of magical, and the similarity of its name to raytracing keeps me wonder... Read more 29 Nov 2018 - 8 minute read

My Siggraph 2018 - Part 2

Continue on the previous post - more about my Siggraph 2018 journey. Day 4 This day was Epic. 4 sessions were filling up the whole day. Started with The Technology Behind ‘The Speed of Light’. Epic: The Technology Behind ‘The Speed of Light’ The Speed of Light is the featured project of Epic this year which showcased the latest real-time ... Read more 24 Aug 2018 - 4 minute read

My Siggraph 2018 - Part 1

Thanks to the sponsorship of my company Archiact, I was given the opportunity to experience this year Siggraph with a full-conference pass. This 5-day conference was quite an informative and mind-blowing journey. During all types of events I had a great time getting involved with the CG community and learning from the best of the industry. He... Read more 16 Aug 2018 - 6 minute read

Raytracing - Dielectric Materials

Chapter 9 study note. Breakdown topics about basic optic physics (refractive index, Snell’s Law, total reflection, Fresnel coefficients, Schlick’s approximation) and vector maths for calculating refraction ray. Dielectric Transparent Material Dielectric material can reflect light and at the same time let the light pass through - refract. ... Read more 05 Aug 2018 - 8 minute read

Raytracing - Reflecting Materials

Chapter 8 study note. Breakdown topics about Material base class, types of reflection, vector maths for calculating mirror reflection ray and blurry reflection implementation. Material Base Class Objects with different materials scatter the lights in different ways. It tells how rays interact with the surface. When abstracting materials as ... Read more 30 Jul 2018 - 4 minute read

Raytracing - Diffuse Materials

Chapter 7 study note. Breakdown topics about diffuse reflection, random reflecting ray generation and rejection sampling in unit sphere. Diffuse Material and Diffuse Reflection Object with a diffuse material doesn’t emit light but take on the colors from the surroundings(background/sky light), and modulate (alter the amplitude or frequency ... Read more 20 Jul 2018 - 4 minute read

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