[GAMES202] Lecture 1 & 2

Lecture 1. Intro

What’s?

1 Real-Time: Frame rate $\ge30$ and $\ge90$ for VR/AR. (Rendering not meeting this stantard is interactive) 2 High Quality: Realistic and (phisically) correctness (exactly or approximately).

Technological Milestones

Programmable rendering pipeline (20 years ago) compute shaders Precomputed-based methods (15 years ago) PrecRadianceTransfer, SphericalHarmonics, Bake Interactive Raytracing (8~10 years ago) CUDA&Optix (low spp + post-process denoising)

Lecture 2. Recap of CG Basics

Graphics Pipeline (A OpenGL Perspective)

Vertex Specification
Vertex Shader
Tessellation, Geometry Shader *
Vertex Post-Process (Transform Feedback, Primitive Assembly and Clipping)
Rasterization
Fragment Shader
Per-Sample Operations (Scissor/Stencil/Depth Testing, Blending, Early-Z, etc.)

Shader Debugging

NSight (Nvidia only) RenderDoc “Print out” as $\text{rgb}$ values

Light Transport Equation, LTE in RTR

Notes: Visibility term: $V(p\leftrightarrow p')$, used in e.g. environment lighting Usually use cosine-weighted BRDF: $f(p,w_i, w_o)cos\theta$