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change invaders to use absolute positions

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This commit is contained in:
ZappoMan 2014-02-03 11:09:30 -08:00
parent f41d2a3c02
commit f33f4e9cc2
1 changed files with 43 additions and 22 deletions
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65
examples/spaceInvadersExample.js
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@ -10,6 +10,10 @@
var iteration = 0; var iteration = 0;
var invaderStepsPerCycle = 30; // the number of update steps it takes then invaders to move one column to the right
var invaderStepOfCycle = 0; // current iteration in the cycle
var invaderMoveDirection = 1; // 1 for moving to right, -1 for moving to left
var itemLifetimes = 60; var itemLifetimes = 60;
var gameAt = { x: 10, y: 0, z: 10 }; var gameAt = { x: 10, y: 0, z: 10 };
var gameSize = { x: 10, y: 20, z: 1 }; var gameSize = { x: 10, y: 20, z: 1 };
@ -46,16 +50,28 @@ function initializeMyShip() {
myShip = Particles.addParticle(myShipProperties); myShip = Particles.addParticle(myShipProperties);
} }
// calculate the correct invaderPosition for an column row
function getInvaderPosition(row, column) {
var xMovePart = 0;
var xBasePart = invadersBottomCorner.x + (column * columnWidth);
if (invaderMoveDirection > 0) {
xMovePart = (invaderMoveDirection * columnWidth * (invaderStepOfCycle/invaderStepsPerCycle));
} else {
xMovePart = columnWidth + (invaderMoveDirection * columnWidth * (invaderStepOfCycle/invaderStepsPerCycle));
}
var invaderPosition = {
x: xBasePart + xMovePart,
y: invadersBottomCorner.y + (row * rowHeight),
z: invadersBottomCorner.z };
return invaderPosition;
}
function initializeInvaders() { function initializeInvaders() {
for (var row = 0; row < numberOfRows; row++) { for (var row = 0; row < numberOfRows; row++) {
invaders[row] = new Array(); invaders[row] = new Array();
for (var column = 0; column < invadersPerRow; column++) { for (var column = 0; column < invadersPerRow; column++) {
invaderPosition = { invaderPosition = getInvaderPosition(row, column);
x: invadersBottomCorner.x + (column * columnWidth),
y: invadersBottomCorner.y + (row * rowHeight),
z: invadersBottomCorner.z };
invaders[row][column] = Particles.addParticle({ invaders[row][column] = Particles.addParticle({
position: invaderPosition, position: invaderPosition,
velocity: { x: 0, y: 0, z: 0 }, velocity: { x: 0, y: 0, z: 0 },
@ -71,22 +87,14 @@ function initializeInvaders() {
} }
} }
var invadersMovingRight = true;
function moveInvaders() { function moveInvaders() {
print("moveInvaders()..."); print("moveInvaders()...");
if (invadersMovingRight) {
invaderMoveX = 0.05;
} else {
invaderMoveX = -0.05;
}
for (var row = 0; row < numberOfRows; row++) { for (var row = 0; row < numberOfRows; row++) {
for (var column = 0; column < invadersPerRow; column++) { for (var column = 0; column < invadersPerRow; column++) {
props = Particles.getParticleProperties(invaders[row][column]); props = Particles.getParticleProperties(invaders[row][column]);
if (props.isKnownID) { if (props.isKnownID) {
newPosition = { x: props.position.x + invaderMoveX, invaderPosition = getInvaderPosition(row, column);
y: props.position.y, Particles.editParticle(invaders[row][column], { position: invaderPosition });
z: props.position.z };
Particles.editParticle(invaders[row][column], { position: newPosition });
} }
} }
} }
@ -95,8 +103,14 @@ function moveInvaders() {
function update() { function update() {
print("updating space invaders... iteration="+iteration); print("updating space invaders... iteration="+iteration);
iteration++; iteration++;
if ((iteration % 60) == 0) { invaderStepOfCycle++;
invadersMovingRight = !invadersMovingRight; if (invaderStepOfCycle > invaderStepsPerCycle) {
invaderStepOfCycle = 0;
if (invaderMoveDirection > 0) {
invaderMoveDirection = -1;
} else {
invaderMoveDirection = 1;
}
} }
moveInvaders(); moveInvaders();
} }
@ -104,14 +118,15 @@ function update() {
// register the call back so it fires before each data send // register the call back so it fires before each data send
Script.willSendVisualDataCallback.connect(update); Script.willSendVisualDataCallback.connect(update);
function endGame() { function cleanupGame() {
print("ending game..."); print("cleaning up game...");
Particles.deleteParticle(myShip); Particles.deleteParticle(myShip);
print("endGame() ... Particles.deleteParticle(myShip)... myShip.id="+myShip.id); print("cleanupGame() ... Particles.deleteParticle(myShip)... myShip.id="+myShip.id);
for (var row = 0; row < numberOfRows; row++) { for (var row = 0; row < numberOfRows; row++) {
for (var column = 0; column < invadersPerRow; column++) { for (var column = 0; column < invadersPerRow; column++) {
Particles.deleteParticle(invaders[row][column]); Particles.deleteParticle(invaders[row][column]);
print("endGame() ... Particles.deleteParticle(invaders[row][column])... invaders[row][column].id="+invaders[row][column].id); print("cleanupGame() ... Particles.deleteParticle(invaders[row][column])... invaders[row][column].id="
+invaders[row][column].id);
} }
} }
@ -121,6 +136,12 @@ function endGame() {
} }
Script.stop(); Script.stop();
} }
Script.scriptEnding.connect(cleanupGame);
function endGame() {
print("ending game...");
Script.stop();
}
function moveShipTo(position) { function moveShipTo(position) {
myShip = Particles.identifyParticle(myShip); myShip = Particles.identifyParticle(myShip);