p_hp is health variable and o_skeleton is our enemy. What I want to do is to kill the player when it collides with the skeleton 3 times, but it seems It doesn't work.
What did I do wrong?
p_hp=3;
if(place_meeting(x,y,o_skeleton))
{
p_hp=p_hp-1
}
if(place_meeting(x,y,o_skeleton)) && (p_hp==0)
{
instance_destroy(self);
}
Please help to solve my issue.
Is p_hp = 3 declared in the Step Event? then that means each time it reached that code, p_hp will reset back to 3. And the Step Event is called each frame.
I recommend declaring variables that'll change later on in the Create Event.
Also, It's better to use this to check if your character is still alive:
if (p_hp <= 0)
{
instance_destroy(self);
}
That way it doesn't need to collide to check if it's still alive, and if the chance happens that p_hp is lower than 0. It will still be destroyed.
Keep in mind, this possible results in the player dying instantly to the skeleton, because it's checking the Step Event each frame. In that case, you'll need to look into a short invincibility time after getting hit.
Adding invincibility after getting hit:
There are multiple ways to add invincibility, the method I use is to add invincibility would be making an invincibility variable and use that as a timer. give it a value the moment it's hit, and let it return to 0 over time. you should also add the check if the invincibility value is higher than 0;
So, in practise:
Create Event:
p_hp = 3;
invicibility = 0;
Step Event:
if (invincibility > 0) //timer in step event
{
invincibility -= 1/room_speed // (1/room_speed) = real time seconds
}
if (place_meeting(x,y,o_skeleton) && invincibility <= 0) //avoids getting hit while invincibility has value.
{
p_hp -= 1;
invincibility = 0.5; //grants half a second of invincibility after getting hit
}
if (p_hp <= 0)
{
instance_destroy(self);
}
(And as extra tip: p_hp -= 1 does the same as p_hp = p_hp - 1)
Related
I want to setup kendoNumericTextBox to allow user input any integer number and set step to 1000. But when user enters any value and use spinner, it should update to next multiple of step.
For example:
enter 123, press spin up, value will be 1000
enter 1234, press spin up, value vill be 2000
Is it possible or only way is to handle spin event and modify value from there?
UPDATE:
Ok, guys, thnx for help.
I have this spin handler now and it seems to be working as expected.
function onSpin(e)
{
var currentvalue = kendo.parseInt(this.value());
if (currentvalue > 0)
{
this.value(Math.floor(currentvalue / this.step()) * this.step());
}
if (currentvalue < 0)
{
this.value(Math.ceil(currentvalue / this.step()) * this.step());
}
}
I have provided a dojo below with a potential solution for you:
https://dojo.telerik.com/UQohUjaP/2
I have created a function that will work on the spin and on change value so that it will step the value up/down on the value that you set e.g. 1000
the function is fairly simple and for brevity I have taken out the log statements here:
function onChange() {
var currentvalue = kendo.parseInt(this.value());
if (currentvalue > 0) {
currentvalue = Math.ceil(currentvalue / this.step()) * this.step();
} else if (currentvalue < 0) {
currentvalue = Math.floor(currentvalue / this.step()) * this.step();
} else {
currentvalue = 0;
}
this.value(currentvalue);
}
Unfortunately there doesn't seem to be a simple way of figuring out if the value has gone up or down so I am basically checking to see if the value is greater than 1 or less than 1 and then calculating the ceiling or the floor for the value and then stepping it in the right direction. in order to cater for zero we have a special condition which just sets the value to 0 assuming that is a valid value in your scenario
As you say, it's possible by listening to the spin event:
$("#numerictextbox").kendoNumericTextBox({
min: 0,
spin: function(e) {
var isUp = e.sender._key === 38,
isDown = e.sender._key === 40;
var m = Math.trunc(this.value()/1000),
value = isUp ? m + 1 : m;
this.value(value * 1000);
}
});
I doubt there's something out of the box, because your needs seem somewhat unusual.
I am quite new to programming and decided to make a little game, so far I have only made a small block that is able to move in all 4 directions (left, right, up and down). Pretty simple and nothing extra-ordinary. However, when I run my program, sometimes it will stop working, not as in crashing causing Processing itself to crash, but my program will just end.
As far as my testing goes, I think this happens when I press two keys at the same time (like W and S). Does anyone happen to know what causes it to stop, and perhaps how to fix it as well?
void setup(){
size(1080,720);
frameRate(30);
}
int shipLR = 0; //Variable for the ship to go left/right
int shipUD = 0; //Variable for the ship to go up / down
void draw(){
background(0);
shipLR = constrain(shipLR, 0, 1040); //Constrain the ship in the window
shipUD = constrain(shipUD,0,680); // Constrain the ship in the window
move();
Shuttle();
}
void Shuttle(){
rect(shipLR, shipUD, 40,40); //Draw the ship
}
void move(){
if (keyPressed) {
if (key == 'a') {
shipLR = shipLR - 20; // Go left
return;}
if (key == 'd') {
shipLR = shipLR + 20; // Go right
return;}
if (key == 'w'){
shipUD = shipUD - 20; // Go up
return;}
if (key == 's') {
shipUD = shipUD + 20; // Go down
return;}
}
}
Any help will be greatly appreciated.
Edit: I found something that causes this problem to occur more frequent; If I implement a frameRate of a value lower than 60 (currently trying with 30) this happens more often.
Edit 2: With the suggestions below of making my move function in a single if block had a lot of good impact. The program no longer stops when I move the ship in the middle of the window it no longer stops, it now only does it at rare occasions when I bump too often against the borders of the window. Perhaps it has something to do with constrain?
in move() (java naming conventions specify that method names start with lower case) you should exit on the first key pressed found. the code can be re-organized to reduce multiple identical conditions:
void move(){
if (keyPressed) {
if (key == 'a') {
shipLR = shipLR - 20; // Go left
return;
}
if (key == 'd') { // still inside if keyPressed
shipLR = shipLR + 20; // Go right
return;
}
if (key == 'w') {
...
}
} // end of if keyPressed
}
My guess it that the program doesn't "stop working" or end- it's just that your rectangle stops moving. If you let go of all the keys, then push just one key, I'd bet that the rectangle starts moving again. (In the future, please try to be more specific- saying "it stops working" isn't very helpful.)
Anyway, that's because of the way you're handling the key presses. What happens if you press a key other than the ones you're checking for?
You'll enter the move() function, and you'll enter the if(keyPressed) block, but you won't enter any if the other if statements inside that block. The key variable only holds the most recently pressed key.
Depending on what you want to do, you should either refactor those if statements to only change the direction if the key was valid, and to ignore all other key presses. Or you might want to use a set of boolean variables to track multiple keys being pressed at the same time. More info on that approach can be found here.
If you still can't get it working, then please try to be more specific about exactly what happens.
I'm working on an AS3 project and for one of the effects I use timers to switch the colors then stop. The function is below.
//global variable
private var valueAnimationTimer:Timer = new Timer(50);
//constructor
valueAnimationTimer.addEventListener(TimerEvent.TIMER, scrollUp );
//function
private function scrollUp(e:TimerEvent):void
{
var i:int = e.currentTarget.currentCount as int;
if (i < 10)
{
if (colored){
if (i % 2 == 0){
ChangeColor(ico, flickerColor);
}
else{
ico.transform.colorTransform = new ColorTransform();
}
}
tfValue.y -= 7.5;
}
else
{
RemoveFilters(ico);
tfValue.y = ico.height / 2;
e.currentTarget.reset();
RemoveSprite(tfValue);
colored = false;
}
}
Each character (object) has it's own version of this function and it happens at different times (like when it is injured or poisoned). The listener is added once in the constructor, it is only removed when the character dies and is removed from the stage. The issue here is after the timer is used on at least 3 characters, the frame rate begins to drop. Every time the function is called, the frame rate drops lower and lower.
What I don't understand is, if the timer is stopped, and the listeners are only added once so it doesn't overload the stack, then why does the frame rate begin to decline after the listener is actually used? It doesn't run forever only for a small amount of time, but it happens again and again. When the frame rate drops the entire program begins to lag badly and eventually freezes. I have no idea what is causing this
Also be aware that inside of the Timer function, the first number is your count in MILLISECONDS and the second is repeat count
var fl_TimerInstance:Timer = new Timer(240000, 1);
So this example above is a 4 minute timer that repeats 1 time
I bring this up because yours is set for 50 milliseconds which is very quick lol
I'm trying to make a game with the XNA library. I want a sprite to throw a fireball to hit falling asteroids. But I have a problem with pressing the concrete key: I want to throw fireballs, for example, with one second between throws.
I want to measure the time difference between creating instances. How can I do that?
UYou can use the ElapsedGameTime property of the gameTime variable passed to the Update method like this:
const float shootTimer = 1.0f;
float elapsedTime = 0f;
protected override void Update(GameTime gameTime)
{
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
this.Exit();
elapsedTime += gameTime.ElapsedGameTime.TotalSeconds;
if(elapsedTime >= shootTimer && /* Your logic to see if you should shoot a fireball */ )
{
// Shoot the fireball!
elapsedTime = 0f;
}
base.Update(gameTime);
}
Basically, what you are doing in the above code is setting a minimum value (seconds) that need to pass between each shot.
Then you create a variable that will store the amount of time that has passed between each shot.
In the Update method, you add the time between each Update call and then check if it is bigger than the timer, and if it is, then you shoot and reset the elapsed time.
Note: I wrote that piece of code out of the top of my mind so it may have some minor issue.
Each call to Update of your main Game class or any GameComponent receives an instance of GameTime as an argument. Its property ElapsedGameTime can be used to accumulate the passage of time.
Right, I've got a slight problem here, in which I've attempted to implement a lap timer.
In my protect override void update I've got this;
if ((IntersectPixels(destinationRedRect, car2redTextureData, startingLineRectangle, startingLineTextureData)))
{
{
redHit = true;
_timer1 += gameTime.ElapsedGameTime.TotalMilliseconds;
}
}
What I'm saying here^ is, if car2red is colliding with the starting line, the timer begins, but if it's not, timer does not add seconds (it just stops_ . How can I make it so, if car2red hits the startingLine and moves forward a few pixels (without touching starting line) the timer still continues?
Thank you.
You should have a separate if statement like this:
if (redHit) {
_timer1 += gameTime.ElapsedGameTime.TotalMilliseconds;
}
if ((IntersectPixels(destinationRedRect, car2redTextureData, startingLineRectangle, startingLineTextureData)))
{
redHit = true;
//Only use this line if you want to reset the timer to 0 when the player crosses that line again.
_timer1 = 0;// I'm assuming that _timer1 is a double
}