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Basic falling sand script

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barnold1953 2014-07-14 16:16:07 -07:00
parent 829918e6c0
commit 13960cd645
1 changed files with 91 additions and 0 deletions
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examples/fallingSand.js Normal file
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var SAND_LIFETIME = 100.0;
var UPDATE_RATE = 1.0;
var SAND_SIZE = 0.125;
var sandArray = [];
var numSand = 0;
var red = 255;
var green = 0;
var blue = 0;
var SOURCE_POSITION = MyAvatar.position;
function update() {
for (var i = 0; i < numSand; i++) {
updateSand(i);
}
var voxel = Voxels.getVoxelAt(SOURCE_POSITION.x, SOURCE_POSITION.y, SOURCE_POSITION.z, SAND_SIZE);
if (voxel.s == 0) {
sandArray[numSand] = {x: SOURCE_POSITION.x, y: SOURCE_POSITION.y, z: SOURCE_POSITION.z, s: SAND_SIZE, r: red, g: green, b: blue};
numSand++;
Voxels.setVoxel(SOURCE_POSITION.x, SOURCE_POSITION.y, SOURCE_POSITION.z, SAND_SIZE, red, green, blue);
}
}
function isVoxelEmpty(x, y, z) {
var adjacent = Voxels.getVoxelAt(x, y, z, SAND_SIZE);
return (adjacent.s == 0);
}
function tryMoveVoxel(voxel, x, y, z) {
//If the adjacent voxel is empty, we will move to it.
if (isVoxelEmpty(x, y, z)) {
moveVoxel(voxel, x, y, z);
return true;
}
return false;
}
function moveVoxel(voxel, x, y, z) {
Voxels.eraseVoxel(voxel.x, voxel.y, voxel.z, SAND_SIZE);
Voxels.setVoxel(x, y, z, SAND_SIZE, red, green, blue);
voxel.x = x;
voxel.y = y;
voxel.z = z;
}
function updateSand(i) {
var voxel = sandArray[i];
//Down
if (tryMoveVoxel(voxel, voxel.x, voxel.y - SAND_SIZE, voxel.z)) return true;
//Left
if (isVoxelEmpty(voxel.x - SAND_SIZE, voxel.y, voxel.z) &&
isVoxelEmpty(voxel.x - SAND_SIZE, voxel.y - SAND_SIZE, voxel.z)) {
moveVoxel(voxel, voxel.x - SAND_SIZE, voxel.y, voxel.z);
return true;
}
//Back
if (isVoxelEmpty(voxel.x, voxel.y, voxel.z - SAND_SIZE) &&
isVoxelEmpty(voxel.x, voxel.y - SAND_SIZE, voxel.z - SAND_SIZE)) {
moveVoxel(voxel, voxel.x, voxel.y, voxel.z - SAND_SIZE);
return true;
}
//Right
if (isVoxelEmpty(voxel.x + SAND_SIZE, voxel.y, voxel.z) &&
isVoxelEmpty(voxel.x + SAND_SIZE, voxel.y - SAND_SIZE, voxel.z)) {
moveVoxel(voxel, voxel.x + SAND_SIZE, voxel.y, voxel.z);
return true;
}
//Front
if (isVoxelEmpty(voxel.x, voxel.y, voxel.z + SAND_SIZE) &&
isVoxelEmpty(voxel.x, voxel.y - SAND_SIZE, voxel.z + SAND_SIZE)) {
moveVoxel(voxel, voxel.x, voxel.y, voxel.z + SAND_SIZE);
return true;
}
return false;
}
function scriptEnding() {
for (var i = 0; i < numSand; i++) {
var voxel = sandArray[i];
Voxels.eraseVoxel(voxel.x, voxel.y, voxel.z, SAND_SIZE);
}
}
Script.update.connect(update);
Script.scriptEnding.connect(scriptEnding);