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The Rendering Equation. Given a scene consisting of geometric primitives with material properties and a set of light sources, compute the illumination at each point on each surface. Challenges Primitives complex: lights, materials, shapes Infinite number of light paths Solution Ray tracing. Lighting Example: Cornell Box.
The Rendering Equation. Given a scene consisting of geometric primitives with material properties and a set of light sources, compute the illumination at each point on each surface. Challenges Primitives complex: lights, materials, shapes Infinite number of light paths Solution Ray tracing. Lighting Example: Cornell Box.
Introduction to Computer Graphics 2022 •Shading refers to the process of altering the color of an object/surface/polygon in the 3D scene •In physically-based rendering, shading tries to approximate the local behavior of lights on the object’s surface, based on things like •Surface orientation (normal) N •Lighting direction vL (and Ө i)
Introduction to Computer Graphics 2022 used for per-fragment lighting (after OpenGL 2.0) used for per-vertex lighting
What Causes Shading? Shading caused by different angles with light, camera at different points. Lighting? Problem: Model light‐surface interaction at vertices. to determine vertex color and brightness. Calculate lighting based on angle that surface makes with light, viewer. Per vertex calculation?
What is computer graphics? Applications. What is it good for? Systems & software. How does it related to this course? Introduction. • What is computer graphics? Luxo, Jr. Pixar. What issues must be addressed by a computer graphics system? Overview. • Topics in computer graphics.
Introduction to Computer Graphics. Yu-Ting Wu. 1. Recap. From week 2 to week 4, we introduced how a 3D shape shows up on the screen. In the last week, we had a quick glance at the GPU graphics pipeline. Next, we will talk about how to determine the fragment color. Lighting and shading. Texture mapping. Alpha blending for transparency objects.
