[GameDev] Tools Programming

[GameDev]

Tools Programming

Marco Tarini

This Course

this course

game contents

Intro: Game Tools

game

game engine game

tools

digital artists

game contents

Intro: game contents!

(aka game assets)

3D data

models

textures

materials

shaders

animations

collision objects

etc

audio

music

sound fxs

ambient sounds

voice overs

etc

video

2D art

screen splashes

backgrounds

GUI / HUD elements (e.g. buttons, bars),

[ sprites & tile-sets ? ]

etc

text

dialogues trees

messages

translations

etc

etc:

scripts

stats levels

game contents

Intro: Game Tools

game

game engine game

tools

digital artists

game contents

[MOD]

contents digression:

game [MOD] development

game

game engine (public)

game tools

game fans!

[MOD]

contents

(aka game assets)

3D content

models

textures

materials

shaders

animations

collision objects

etc

audio

music

sound fxs

ambient sounds

voice overs

etc

video

cut-scenes, intros

etc

2D art

screen splashes

backgrounds

GUI / HUD elements (e.g. buttons, bars),

[ sprites & tile-sets ? ]

etc

text

dialogues trees

messages

translations

etc

etc:

scripts,

stats,

levels'

3D Models i.e. tri-meshes with:

per vertex attrib

normals, color, AO,

LODs

“uv-mapping”

keyframes

cyclic animations

face-morphs,

“rigging”

Materials

lighting model stats / flags

textures

RGB maps

normal maps

alpha maps

shaders

vertex, fragments,

Intro:

3D game contents

Animations

vertex animations

skeletal animations

Skeletons

Collision objects

hit-boxes

bounding objects

Particle systems

Environments

skydomes

env. maps

scene props

bounding volumes

Tipi di bounding volumes:

Axis Aligned Bounding Box (A.A.B.B.)

(generic) Bounding Box

Discrete Oriented Polytope (D.O.P.)

Bounding sphere

Bounding ellipsoids (axis aligned or not)

Bounding cylinders



Difetti e pregi

quanto sono onerosi da pre-computare?

quanto sono aderenti ?

sono robusti a rotazioni ?

quanto sono onerose le query (es.: di intersezione)?

Rendering di scene composite

spazio mondo (globale) spazio oggetto ruota 1 spazio oggetto automobile

M a r c o T a r i n i ‧ C o m p u t e r G r a p h i c s ‧ 2 0 1 2 / 1 3 ‧ U n i v e r s i t à d e l l ’ I n s u b r i a

V

M

M

M

M

M

M

M

posizonamento della automobile

(rispetto al mondo)

posiz. della ruota (rispetto

all’

automobile)

Scene graph

V

M

M

M

M

M

M

M

posizonamento della automobile

(rispetto al mondo)

posiz. della ruota (rispetto

all’

automobile)

Un robot animato…

M

M

M

M

M

M

Robot (bacino) spazio mondo

busto1

gamba Sx

gamba Dx

spalla Dx

spalla Sx

polpaccio Dx busto2

M

M

piede Dx

M

M

collo

Algoritmo 1

mult_matrix( M );

draw( bacino );

push();

mult_matrix( M0 );

draw( busto1 );

mult_matrix( M1 );

draw( busto2 );

push( );

multMatrix( M3 );

draw( spallaDx );

… /* resto del braccio dx */

pop();

push( );

multMatrix( M3 );

draw( spallaSx );

… /* resto del braccio sx */

pop();

pop();

push();

mult_matrix( M2 );

draw( gambaDx );

… pop();

poses(for a skeleton) poses(for a skeleton)

skins(rigged meshes) skins(rigged meshes) skeletons

skeletons

oggetti

Skel Human

rest pose

(or: bind pose)

pose 0 pose 0 pose 0 pose t20

Skin 1 Skin 2

pose 0 pose 0 pose t18

Skel Horse

animation 1 animation 2

“rigging”

skins(rigged meshes) skins(rigged meshes)

(Linear blend) Skinning:

Skel Human

pose 0 pose 0 pose t20

Skin 1 Skin 2

pose 0 pose 0 pose t18

animation 1 animation 2

Vincoli

 +

rag

dolling