media @ VU
web3d-vr-race.vr
web3d-vr-race.vr
(wrl
)
[ flux /
bitmanagement /
cortona /
octaga
]
Web3D/VR
scene
NavigationInfo {
type ["NONE"]
}
DEF DEFAULT_VIEWPOINT Viewpoint {
position 0 40 0
orientation 1 0 0 -1.57
}
Shape {
geometry Box { size 40 0.1 40 }
appearance Appearance {
texture ImageTexture { url "local/game/images/grid.gif" }
}
}
object :
DEF OBJECT Transform {
children Transform {
rotation 1 0 0 1.57
children [
Shape {
geometry Cone {}
appearance Appearance {
material Material {
emissiveColor 1 0 0
}
}
}
]
}
}
script
DEF SCRIPT Script {
directOutput TRUE
field SFNode me USE SCRIPT
field SFTime oldTick 0
eventIn SFTime tick
field SFInt32 oldMask 0
eventIn SFNode onEvent
eventOut SFVec3f position_changed
eventOut SFRotation orientation_changed
eventOut SFInt32 hide_text
field SFFloat speed 0
field SFVec3f position 0 0 0
field SFVec3f direction 0 0 1
field SFRotation orientation 0 0 1 0
field SFRotation rotA 0 0 1 0
field SFRotation rotB 0 0 1 0
field SFVec3f defDirection 0 0 1
field SFVec3f yAxis 0 1 0
field SFVec3f up 0 1 0
keys
field SFBool upk FALSE
field SFBool down FALSE
field SFBool left FALSE
field SFBool right FALSE
field SFBool space FALSE
field SFInt32 k_upk 1004 ##38
field SFInt32 k_down 1005 ##40
field SFInt32 k_left 1006 ##37
field SFInt32 k_right 1007 ##39
field SFInt32 k_space 32
initialize
url "javascript:
function initialize() {
connectKeyboard();
}
function shutdown() {
disconnectKeyboard();
}
function connectKeyboard() {
// tell what events
oldMask = Browser.eventMask;
Browser.eventMask = ((1<<5) | (1<<6)); // KeyUp&Down Only...
// add event observer
Browser.addRoute(Browser,'event_changed',me,'onEvent');
}
function disconnectKeyboard()
{
// remove event observer
Browser.deleteRoute(Browser,'event_changed',me,'onEvent');
Browser.eventMask = oldMask;
}
onEvent
function onEvent(e,t) {
if (e.type == 'keydown') {
if(e.keyCode == k_left) {
left = TRUE;
e.returnValue = false;
} else if(e.keyCode == k_upk) {
upk = TRUE;
e.returnValue = false;
} else if(e.keyCode == k_right) {
right = TRUE;
e.returnValue = false;
} else if(e.keyCode == k_down) {
down = TRUE;
e.returnValue = false;
} else if(e.keyCode == k_space) {
space = TRUE;
e.returnValue = false;
}
} else if (e.type == 'keyup') {
if(e.keyCode == k_left) {
left = FALSE;
e.returnValue = false;
} else if(e.keyCode == k_upk) {
upk = FALSE;
e.returnValue = false;
} else if(e.keyCode == k_right) {
right = FALSE;
e.returnValue = false;
} else if(e.keyCode == k_down) {
down = FALSE;
e.returnValue = false;
} else if(e.keyCode == k_space) {
space = FALSE;
e.returnValue = false;
}
} else {
Browser.print('Unknown event : '+e.type);
}
}
tick & update
function tick(v,t) {
if(oldTick == 0) {
oldTick = v;
}
while (oldTick < v) {
update();
oldTick = oldTick + 0.05;
}
}
function update() {
// Y-as wordt eigenlijkniet gebruikt, beweging
// i beperkt tot x/z vlak,
// maar voor de volledigheid wordt het wel
// allemaal netjes berekend...
if(space) {
hide_text = -1;
}
// Up/Down = gas/rem
if(upk) {
speed = speed + 0.01;
}
if(down) {
speed = speed - 0.01;
}
// Left/Right = sturen
// Eigenlijk zou snelheid sturen moeten beinvloeden
if(left) {
direction = (new SFRotation(0,1,0, 0.1)).multVec(direction);
}
if(right) {
direction = (new SFRotation(0,1,0,-0.1)).multVec(direction);
}
// verplaats object
position[0] = position[0] + direction[0]*speed;
position[1] = position[1] + direction[1]*speed;
position[2] = position[2] + direction[2]*speed;
position_changed = position;
// output de juiste updates
rotA = new SFRotation(defDirection,direction);
up = rotA.multVec(yAxis);
rotB = new SFRotation(direction.cross(up),
direction.cross(yAxis));
orientation = rotA.multiply(rotB);
orientation_changed = orientation;
}
"
}
sensor and routing
DEF TIMER TimeSensor {
enabled TRUE
loop TRUE
}
ROUTE TIMER.time_changed TO SCRIPT.tick
ROUTE SCRIPT.position_changed TO OBJECT.translation
ROUTE SCRIPT.orientation_changed TO OBJECT.rotation
a little manual...
EXTERNPROTO STText [
exposedField MFString string
] [ "@vr-example-text-proto.wrl" ]
DEF HIDE_TEXT Switch {
whichChoice 0
choice [
Group {
children [
Transform {
translation 0 1.8 0
children [
Shape {
appearance Appearance {
material Material {
diffuseColor 0 0 0
emissiveColor 0 0 0
specularColor 0 0 0
transparency 0.4
}
}
geometry Box { size 27 0.1 20 }
}
]
}
Transform {
translation -13.5 2 -9
rotation 1 0 0 -1.57
children [
STText {
string [
" BOGUS LITTLE GAME ",
" (RACING MOTION) ",
"",
"CONTROLS",
"---------------------",
"UP :ACCELERATE",
"DOWN :BRAKE ",
"LEFT/RIGHT:TURN",
"---------------------",
"",
"SHOWS",
"---------------------",
"BLAXXUN KEYBOARD ",
"SCRIPT BASED MOTION ",
"GAME LOOP ",
"BLAXXUN TEXTURE-TEXT ",
"---------------------",
"",
"PRESS SPACE TO START!"
]
}
]
}
]
}
]
}
ROUTE SCRIPT.hide_text TO HIDE_TEXT.whichChoice
(C) A. Eliëns
21/5/2007
You may not copy or print any of this material without explicit permission of the author or the publisher.
In case of other copyright issues, contact the author.
