Hey Guys,
Ok i have been looking at a racing game and have used the tutorial from this link here:
http://www.emanueleferonato.com/2007/05/15/create-a-flash-racing-game-tutorial/
What i am having trouble with is trying to create a scrolling background whilst keeping the car static in the centre of the screen. Ane example of what im trying to do is here: http://www.mindmafya.com/index/maps
So i have tried incorporating the code from that scrolling background example, into the car racing game itself but i am having trouble doing so. Is there any way that the code used from the scrolling background can be input into the racing game example to create this scrolling background effect?
Thanks Guys.
Below is the Actions for the Racing Game itself. Check out the whole Racing Game tutorial using the link at the top.
function step(who) {
//check to see if the car in question is controlled by the player or by the computer
if (_root["car"+who].code == "player") {
//we will constantly decrease speed by multiplying it with a number below 1
if (this["speed"+who]>0.3) {
this["speed"+who] *= _root.speedDecay;
} else {
this["speed"+who] = 0;
}
//the car will react to certain keys
//accelerate
if (Key.isDown(Key.UP) && this["speed"+who]<_root.maxSpeed) {
this["speed"+who] += _root.acceleration;
}
//brake (reverse)
if (Key.isDown(Key.DOWN)) {
this["speed"+who] -= _root.backSpeed;
}
//steer left
if (Key.isDown(Key.LEFT) && Math.abs(this["speed"+who])>0.3) {
_root["car"+who]._rotation -= _root.rotationStep*(this["speed"+who]/_root.maxSpeed);
}
//steer right
if (Key.isDown(Key.RIGHT) && Math.abs(this["speed"+who])>0.3) {
_root["car"+who]._rotation += _root.rotationStep*(this["speed"+who]/_root.maxSpeed);
}
this["rotation"+who] = _root["car"+who]._rotation;
//we calculate the two components of speed (X axis and Y axis)
this["speedx"+who] = Math.sin(this["rotation"+who]*(Math.PI/180))*this["speed"+who];
this["speedy"+who] = Math.cos(this["rotation"+who]*(Math.PI/180))*this["speed"+who]*-1;
//apply the components on the actual position of the car
_root["car"+who]._x += this["speedx"+who];
_root["car"+who]._y += this["speedy"+who];
//the collisions
//define the four collision points
_root["car"+who].pointLeft = {x:-20, y:0};
_root["car"+who].localToGlobal(_root["car"+who].pointLeft);
_root["car"+who].pointRight = {x:20, y:0};
_root["car"+who].localToGlobal(_root["car"+who].pointRight);
_root["car"+who].pointFront = {x:0, y:-25};
_root["car"+who].localToGlobal(_root["car"+who].pointFront);
_root["car"+who].pointBack = {x:0, y:25};
_root["car"+who].localToGlobal(_root["car"+who].pointBack);
//let's use some shorter variable names :)
this["lpx"+who] = _root["car"+who].pointLeft.x;
this["lpy"+who] = _root["car"+who].pointLeft.y;
this["rpx"+who] = _root["car"+who].pointRight.x;
this["rpy"+who] = _root["car"+who].pointRight.y;
this["fpx"+who] = _root["car"+who].pointFront.x;
this["fpy"+who] = _root["car"+who].pointFront.y;
this["bpx"+who] = _root["car"+who].pointBack.x;
this["bpy"+who] = _root["car"+who].pointBack.y;
//check for collisions
if (_root.terrain.hitTest(this["lpx"+who], this["lpy"+who], true)) {
_root["car"+who]._rotation += 5;
this["speed"+who] *= 0.85;
}
if (_root.terrain.hitTest(this["rpx"+who], this["rpy"+who], true)) {
_root["car"+who]._rotation -= 5;
this["speed"+who] *= 0.85;
}
if (_root.terrain.hitTest(this["fpx"+who], this["fpy"+who], true)) {
this["speed"+who] = -1;
}
if (_root.terrain.hitTest(this["bpx"+who], this["bpy"+who], true)) {
this["speed"+who] = 1;
}
//position the shadow of the car
_root["shadow"+who]._x = _root["car"+who]._x-4;
_root["shadow"+who]._y = _root["car"+who]._y+2;
_root["shadow"+who]._rotation = _root["car"+who]._rotation;
//checkpoints
if (_root["car"+who].hitTest(_root["checkpoint"+_root["currentCheckpoint"+who]])) {
//if the current checkpoint is the start line - increase the lap number
if (_root["currentCheckpoint"+who] == 1) {
if (_root["currentLap"+who] != 0) {
_root.setBestLap();
}
if (_root["currentLap"+who] == _root.totalLaps){
_root.gotoAndStop("finish");
}else{
_root["currentLap"+who]++;
}
_root.currentLapTXT = _root["currentLap"+who]+"/10";
}
_root["currentCheckpoint"+who]++;
//if the current checkpoint is the last checkpoint - set the next checkpoint to the start line
if (_root["currentCheckpoint"+who]>_root.checkpoints) {
_root["currentCheckpoint"+who] = 1;
}
}
}
if (_root["car"+who].code == "computer") {
}
}
function setTimes() {
timeElapsed = getTimer()-_root.initialTime;
milliseconds = timeElapsed;
seconds = Math.floor(milliseconds/1000);
minutes = Math.floor(seconds/60);
minutesTXT = minutes;
secondsTXT = seconds-minutes*60;
tensTXT = Math.round((milliseconds-seconds*1000)/10);
if (minutesTXT<10) {
minutesTXT = "0"+minutesTXT;
}
if (secondsTXT<10) {
secondsTXT = "0"+secondsTXT;
}
if (tensTXT<10) {
tensTXT = "0"+tensTXT;
}
_root.totalTimeTXT = minutesTXT+"."+secondsTXT+"."+tensTXT;
}
function setBestLap() {
bestTime = getTimer()-_root.lapTime;
milliseconds = bestTime;
if (oldMilliseconds>milliseconds || oldMilliseconds==null) {
oldMilliseconds = milliseconds;
seconds = Math.floor(milliseconds/1000);
minutes = Math.floor(seconds/60);
minutesTXT = minutes;
secondsTXT = seconds-minutes*60;
tensTXT = Math.round((milliseconds-seconds*1000)/10);
if (minutesTXT<10) {
minutesTXT = "0"+minutesTXT;
}
if (secondsTXT<10) {
secondsTXT = "0"+secondsTXT;
}
if (tensTXT<10) {
tensTXT = "0"+tensTXT;
}
_root.bestLapTXT = minutesTXT+"."+secondsTXT+"."+tensTXT;
}
_root.lapTime = getTimer();
}
7
Replies
AdChoices