3d1 exam

theory questions

who made the first 3d mesh?

ed catmull and fred parke

how did ed catmull and fred parke create the first 3d mesh?

they made mold of their hand and placed polygons on it and then calculated every xyz point and then put it into pc

which was the first 3d game?

IROBOT by atari

what was the first cgi film?

young sherlock holms

what is the 3d pipeline?

preproduction, production, post production

first full animated movie?

toy story

why are triangles good?

because they are flat

how does shading for triangles work?

0deg = white, 90 deg = black

who invented shadesmooth?

Phong

who created the first instance of smoothshade?

gouraud

why do we need to apply scale?

for texel density

what is a pixel?

a single color area that makes a image

of what is the screen made of?

0 and 1, 0 = off and 1 = on

what kind of pixels does the screen use??

rgb → human eye picks up these colors

what is resolution?

the amount of pixels on screen

what are the measurements of FHD?

1920 × 1018

what are the measurements of HD?

1280 × 720

what is the aspect ratio?

16.9 → most used

for what does UV stand for?

nothing its just a set of coordinates

what is texel density?

density of pixels in a 2d space

what is interpolation?

the fuzziness between pixels

what is raytracing?

expensive way to render, shows light reflecting off of objects

what is PBR?

physically based render

what is BSDF?

bidirectional scattering distribution function

what is HDR?

high dynamic range

what is phong reflection?

ambient, diffuse and gloss

of what pipeline is 3d?

cgi pipeline

who created the first animated film?

disney

what types of rendering do you have?

cycles and eevee

when do you have a mesh?

when you have vertices, edges, faces

what does the density of polygons mean?

the amount of polies used to define an object

what are polygons?

multipule points on a surface

whats a local space?

local elements in relation to the pivit point of an object

whats a world space?

objects having coordinates relative to the world origin

whats a pivit point?

0,0,0 point on object

what is a normal?

a vector

whats the lambertian reflection?

the combination of a normal and light direction

whats gouraud shading?

shading a triangle by taking the average of the neighbor face normal

whats phong shading?

smooth surfaces

whats the most used shader?

BSDF shader

in what ratio do textures get saved?

1:1 ratio ( or powers of 2 )

what are the measurements of a 1k uv space?

1024 × 1024

whats vertex shading?

calculations to project 3d mesh onto 2d plane

whats a depth map / z-pass?

calculating the distance from camera to geometry

whats gaussian splatting?

volume rendering technique

what type of light is this?

point light

what type of light is this?

spot light

what type of light is this?

area light

whats the catmull clark subdivision?

universal operation used to smooth geometry

by who is the catmull clark subdivision?

edwin catmull and jim clark

what does the boolean modifier do?

cutting in objects

yes or no?? phong smooth shading is different from phong reflection

yes

who laid down the foundation for BSDF?

pixar

what was the first animated movie to use the principled BSDF?

wreck it ralph