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Ygdrasil User's Guide
Introduction
Getting Started
YG Basics
3D Modeling in Maya
Environment
Creating Avatars
Texturing
Lighting
Triggers
Animation
Sound
Video
Counters, Logic, Math
Dynamics
YG Node Coding
Installing
Debugging and Errors
OpenGL Shading Language
Links
TUTORIALS

An Example Ygdrasil Scene

Here's an example scene to provide a taste of what Ygdrasil is like. It includes a valley, a house, a couple of trees, an animated door, some animated clouds, and a nifty trick to make the inside of the house larger than the outside actually is.

To try out this scene, first download the demo file. Uncompress it to get a folder called "ygdemo1". Open the terminal and cd into that directory. type './rundemo' to run the demo.

ygdemo1.tar.gz (2.7MB)
ygdemo1_smaller.tar.gz (116.4 Kb. Same scene, but without the nice trees.)

The code probably won't make too much sense yet, but will give you an idea of what the language looks like.
#include "User0.scene" switch valleyswitch () { light (position(1 -1 1),diffuse(.7 .7 .2),ambient(.1 .1 .4)) environment (clip(.1 900),skyTopColor(.2 .3 .4),skyBottomColor(.3 .5 1), horizonColor(.7 .5 .2), fog(lin .5 .5 .5 10 1000),mode(SKY_CLEAR)) object(file("valley.pfb")) /* clouds */ object(file("cloud.pfb"),position(50 50 50)) object(file("cloud.pfb"),position(-40 80 60)) object(file("cloud.pfb"),position(100 120 40)) object(file("cloud.pfb"),position(80 50 40)) object(file("cloud.pfb"),position(-150 200 50)) object(file("cloud.pfb"),position(150 220 40)) object (file("tree/tree.pfb"),position(70 80 -8),size(40)) object (file("tree/tree.pfb"),position(-56 141 -5),size(30)) } transform (position(0 150 0)) { switch houseOutside () { object (file("house_exterior.pfb")) object (file("house_exterior_doorframe.pfb")) userTrigger (volume(box -3 -15 0 3 -10 10), when(enter,dooropener.start)) } timer dooropener (startValue(0),endValue(120),duration(1), when(changed,door.orientation(0 0 $value)), when(end,houseInside.on,houseOutside.off,valleyswitch.off ,houseinsideobject.wall(true)+2,swelltimer.start)) object door (file("door.pfb"),position(-2 -9 0),orientation(0 0 0)) switch houseInside (off) { object houseinsideobject (file("house_interior.pfb"),floor(true)) light (position (10 15 10 1),diffuse(.4 .4 .4)) light (position(.3 -1 1),diffuse(.5 .5 .5),ambient(.3 .25 .2)) object (file("sofa.pfb"),position(15 24 0)) object (file("coffeetable.pfb"),position(15 20 0)) object cloud1 (file("cloud.pfb"),position(0 40 20)) object cloud2 (file("cloud.pfb"),position(10 50 18)) object cloud3 (file("cloud.pfb"),position(-5 60 20)) object cloud4 (file("cloud.pfb"),position(15 65 15)) environment (volume(box -20 0 15 20 100 50),fog(lin 1 1 1 1 30)) timer swelltimer (duration(5),startValue(1),endValue(1.4), when(changed,cloud1.size($value),cloud2.size($value), cloud3.size($value),cloud4.size($value)), when(back,reverse),when(front,forward)) } }

(c) Ben Chang
Getting Started
The CAVE
Running Ygdrasil Scenes
Setting Up Directories
Inside the RUN Script
Example Scene