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Merge pull request #2741 from AndrewMeadows/inertia

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update swissArmyJetpack.js script
This commit is contained in:
Brad Hefta-Gaub 2014-04-29 12:15:14 -07:00
commit 4c84d2e2a1
1 changed files with 64 additions and 27 deletions
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91
examples/swissArmyJetpack.js
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@ -19,7 +19,7 @@ var DOWN = { x: 0.0, y: -1.0, z: 0.0 };
var MAX_VOXEL_SCAN_DISTANCE = 30.0; var MAX_VOXEL_SCAN_DISTANCE = 30.0;
// behavior transition thresholds // behavior transition thresholds
var MIN_FLYING_SPEED = 1.0; var MIN_FLYING_SPEED = 3.0;
var MIN_COLLISIONLESS_SPEED = 5.0; var MIN_COLLISIONLESS_SPEED = 5.0;
var MAX_WALKING_SPEED = 30.0; var MAX_WALKING_SPEED = 30.0;
var MAX_COLLIDABLE_SPEED = 35.0; var MAX_COLLIDABLE_SPEED = 35.0;
@ -38,11 +38,16 @@ var TEXT_HEIGHT = BUTTON_HEIGHT;
var TEXT_WIDTH = 210; var TEXT_WIDTH = 210;
var MSEC_PER_SECOND = 1000; var MSEC_PER_SECOND = 1000;
var EXPIRY_PERIOD = 2 * MSEC_PER_SECOND; var RAYCAST_EXPIRY_PERIOD = MSEC_PER_SECOND / 16;
var COLLISION_EXPIRY_PERIOD = 2 * MSEC_PER_SECOND;
var GRAVITY_ON_EXPIRY_PERIOD = MSEC_PER_SECOND / 2;
var GRAVITY_OFF_EXPIRY_PERIOD = MSEC_PER_SECOND / 8;
var dater = new Date(); var dater = new Date();
var collisionOnExpiry = dater.getTime() + EXPIRY_PERIOD; var raycastExpiry = dater.getTime() + RAYCAST_EXPIRY_PERIOD;
var gravityOnExpiry = dater.getTime() + EXPIRY_PERIOD; var gravityOnExpiry = dater.getTime() + GRAVITY_ON_EXPIRY_PERIOD;
var gravityOffExpiry = dater.getTime() + GRAVITY_OFF_EXPIRY_PERIOD;
var collisionOnExpiry = dater.getTime() + COLLISION_EXPIRY_PERIOD;
// avatar state // avatar state
var velocity = { x: 0.0, y: 0.0, z: 0.0 }; var velocity = { x: 0.0, y: 0.0, z: 0.0 };
@ -169,6 +174,19 @@ function updateSpeedometerDisplay() {
} }
Script.setInterval(updateSpeedometerDisplay, 100); Script.setInterval(updateSpeedometerDisplay, 100);
function disableArtificialGravity() {
MyAvatar.motionBehaviors = MyAvatar.motionBehaviors & ~AVATAR_MOTION_OBEY_LOCAL_GRAVITY;
updateButton(3, false);
}
function enableArtificialGravity() {
// NOTE: setting the gravity automatically sets the AVATAR_MOTION_OBEY_LOCAL_GRAVITY behavior bit.
MyAvatar.gravity = DOWN;
updateButton(3, true);
// also enable collisions with voxels
groupBits |= COLLISION_GROUP_VOXELS;
updateButton(1, groupBits & COLLISION_GROUP_VOXELS);
}
// Our update() function is called at approximately 60fps, and we will use it to animate our various overlays // Our update() function is called at approximately 60fps, and we will use it to animate our various overlays
function update(deltaTime) { function update(deltaTime) {
@ -187,31 +205,57 @@ function update(deltaTime) {
dater = new Date(); dater = new Date();
var now = dater.getTime(); var now = dater.getTime();
if (speed < MIN_FLYING_SPEED) { // transition gravity
if (raycastExpiry < now) {
// scan for landing platform // scan for landing platform
ray = { origin: MyAvatar.position, direction: DOWN }; ray = { origin: MyAvatar.position, direction: DOWN };
var intersection = Voxels.findRayIntersection(ray); var intersection = Voxels.findRayIntersection(ray);
// NOTE: it is possible for intersection.intersects to be false when it should be true
// (perhaps the raycast failed to lock the octree thread?). To workaround this problem
// we only transition on repeated failures.
if (intersection.intersects) { if (intersection.intersects) {
if (!(MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY)) { // compute distance to voxel
var v = intersection.voxel; var v = intersection.voxel;
var maxCorner = Vec3.sum({ x: v.x, y: v.y, z: v.z }, {x: v.s, y: v.s, z: v.s }); var maxCorner = Vec3.sum({ x: v.x, y: v.y, z: v.z }, {x: v.s, y: v.s, z: v.s });
var distance = lastPosition.y - maxCorner.y; var distance = lastPosition.y - maxCorner.y;
if ((gravityOnExpiry < now) && (distance < MAX_VOXEL_SCAN_DISTANCE)) {
// NOTE: setting the gravity automatically sets the AVATAR_MOTION_OBEY_LOCAL_GRAVITY behavior bit. if (distance < MAX_VOXEL_SCAN_DISTANCE) {
MyAvatar.gravity = DOWN; if (speed < MIN_FLYING_SPEED &&
updateButton(3, true); gravityOnExpiry < now &&
!(MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY)) {
enableArtificialGravity();
} }
if (speed < MAX_WALKING_SPEED) {
gravityOffExpiry = now + GRAVITY_OFF_EXPIRY_PERIOD;
} else if (gravityOffExpiry < now && MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY) {
disableArtificialGravity();
}
} else {
// distance too far
if (gravityOffExpiry < now && MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY) {
disableArtificialGravity();
}
gravityOnExpiry = now + GRAVITY_ON_EXPIRY_PERIOD;
} }
} else { } else {
if (MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY) { // no intersection
MyAvatar.motionBehaviors = MyAvatar.motionBehaviors & ~AVATAR_MOTION_OBEY_LOCAL_GRAVITY; if (gravityOffExpiry < now && MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY) {
updateButton(3, false); disableArtificialGravity();
} }
gravityOnExpiry = now + EXPIRY_PERIOD; gravityOnExpiry = now + GRAVITY_ON_EXPIRY_PERIOD;
} }
} else {
gravityOnExpiry = now + EXPIRY_PERIOD;
} }
if (speed > MAX_WALKING_SPEED && gravityOffExpiry < now) {
if (MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY) {
// turn off gravity
MyAvatar.motionBehaviors = MyAvatar.motionBehaviors & ~AVATAR_MOTION_OBEY_LOCAL_GRAVITY;
updateButton(3, false);
}
gravityOnExpiry = now + GRAVITY_ON_EXPIRY_PERIOD;
}
// transition collidability with voxels
if (speed < MIN_COLLISIONLESS_SPEED) { if (speed < MIN_COLLISIONLESS_SPEED) {
if (collisionOnExpiry < now && !(MyAvatar.collisionGroups & COLLISION_GROUP_VOXELS)) { if (collisionOnExpiry < now && !(MyAvatar.collisionGroups & COLLISION_GROUP_VOXELS)) {
// TODO: check to make sure not already colliding // TODO: check to make sure not already colliding
@ -220,14 +264,7 @@ function update(deltaTime) {
updateButton(1, groupBits & COLLISION_GROUP_VOXELS); updateButton(1, groupBits & COLLISION_GROUP_VOXELS);
} }
} else { } else {
collisionOnExpiry = now + EXPIRY_PERIOD; collisionOnExpiry = now + COLLISION_EXPIRY_PERIOD;
}
if (speed > MAX_WALKING_SPEED) {
if (MyAvatar.motionBehaviors & AVATAR_MOTION_OBEY_LOCAL_GRAVITY) {
// turn off gravity
MyAvatar.motionBehaviors = MyAvatar.motionBehaviors & ~AVATAR_MOTION_OBEY_LOCAL_GRAVITY;
updateButton(3, false);
}
} }
if (speed > MAX_COLLIDABLE_SPEED) { if (speed > MAX_COLLIDABLE_SPEED) {
if (MyAvatar.collisionGroups & COLLISION_GROUP_VOXELS) { if (MyAvatar.collisionGroups & COLLISION_GROUP_VOXELS) {