I found a great little VRML example that uses PROTO's and javascript and
almost loads into DIY browser.
There is a array out of bounds exception that causes the problem, any ideas?
#VRML V2.0 utf8 CosmoWorlds V1.0
PROTO random_mover [
field SFVec3f start_location 0 0 0
field SFFloat alteration 1
field SFFloat spread 1
]
{
Group {
children [
DEF Ball Transform {
children Shape {
appearance Appearance {
material DEF _1 Material {
diffuseColor 0.8 0.8 0.8
specularColor .8 .5 .5
}
}
geometry Sphere {}
}
translation IS start_location
scale 0.33258 0.33258 0.33258
}
DEF mover Script {
eventOut SFVec3f move_to
eventOut SFColor color_change
eventOut SFVec3f scaler
eventIn SFFloat time_changed
eventIn SFFloat loop_time
field SFVec3f location IS start_location
field SFFloat alteration IS alteration
field SFFloat spread IS spread
field SFVec3f delta 0 0 0
field SFBool first_time TRUE
url "javascript:
function time_changed(value, time)
{
if(first_time == TRUE){
move_to[0]=location[0];
move_to[1]=location[1];
move_to[2]=location[2];
first_time=FALSE;
}
//alteration+=Math.random()*.05;
mu=value*Math.PI*2+alteration;
radius = 2*Math.sin(mu/2);
theta = 10*Math.cos(mu)*Math.sin(mu);
phi = 10*Math.sin(mu*2)*Math.cos(mu);
scaler[0]=.5 + Math.abs(Math.sin(mu*3))*.5;
scaler[1]=.5 + Math.abs(Math.cos(mu*2))*.5;
scaler[2]=.5 + Math.abs(Math.sin(mu*4))*.5;
scaler[0]=scaler[0]*1;
scaler[1]=scaler[1]*1;
scaler[2]=scaler[2]*1;
move_to[0]=1 *radius * spread *
Math.cos(phi)*Math.cos(theta);
move_to[1]=1 *radius * spread *
Math.cos(phi)*Math.sin(theta);
move_to[2]=1 *radius * spread * Math.sin(phi);
color_change[0]=Math.abs(Math.sin(mu*1.47967529296875));
color_change[1]=Math.abs(Math.cos(mu*0.377838134765625));
color_change[2]=Math.abs(Math.sin(mu*1.07968139648438));
}
"
}
DEF Clock TimeSensor {
cycleInterval 120
loop TRUE
#startTime 1
}
]
}
ROUTE Clock.fraction_changed TO mover.time_changed
ROUTE mover.color_change TO _1.set_diffuseColor
ROUTE mover.move_to TO Ball.set_translation
ROUTE mover.scaler TO Ball.set_scale
}
random_mover{start_location 0 0 0
alteration 0}
random_mover{start_location 0 0 0
alteration 0.0666666666666667}
random_mover{start_location 0 0 0
alteration 0.133333333333333}
random_mover{start_location 0 0 0
alteration 0.2}
random_mover{start_location 0 0 0
alteration 0.266666666666667}
random_mover{start_location 0 0 0
alteration 0.333333333333333}
random_mover{start_location 0 0 0
alteration 0.4}
random_mover{start_location 0 0 0
alteration 0.466666666666667}
random_mover{start_location 0 0 0
alteration 0.533333333333333}
random_mover{start_location 0 0 0
alteration 0.6}
DEF Background Transform {
children Background {
skyColor .5 .5 1
}
}
********************
Jack S. Gundrum
Visualization Group
Research Support
Academic Services and Emerging Technology Systems
Information Technology Services
Penn State University
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