I've been making a (potentially massive) multiplayer video game in javascript, nodejs and babylonjs...
It's been a few months that a code is causing me problems in front:
it's currently a simple first person shooter with waves of monsters in player versus player.
The code I'm having trouble with is gravity.
players and monsters can therefore fall or climb, and those from more or less high, of course, the ground is not smooth.
for the moment I calculate the gravity in front only (the server does not receive "y"): I would like not to change that.
The monsters, which can be numerous, are also impacted by gravity only in front.
I searched, went through the babylonjs api and I can't find a viable alternative to "moveWithCollisions"
if (gamers[id][0] == false) {
var before = scene.getMeshByName(gamers[id][1]).gravity.y;
var after = scene.getMeshByName(gamers[id][1]).gravity.y;
for (var a = 0; a < Math.abs(4); a++) {
if (Math.round(after) == Math.round(before)) {
before = scene.getMeshByName(gamers[id][1]).position.y+scene.getMeshByName(gamers[id][1]).gravity.y;
scene.getMeshByName(gamers[id][1]).moveWithCollisions(scene.getMeshByName(gamers[id][1]).gravity);
after = scene.getMeshByName(gamers[id][1]).position.y;
} else {
a = 5;
gamers[id][0] = true;
}
}
when the character receives a move gamers[id][0] becomes false again
I really need a lighter command:
With 100 players and 1000 monsters you will understand that there is no chance that this code will work?
Hence my question, not having the strength to create this command myself, is there a real alternative to the "moveWithCollision" command?
I take you to consider my question, I have been looking for several weeks without finding anything better...
thanks in advance
Related
I am trying to get the attack damage of the item in the players offhand. So far I have this mc.player.inventory.offhand.get(0) in my world ticking event (mc is the instance of minecraft). But the item does not seem to have any attack damage attribute. Is there some other way to get it?
I had the same problem, and It took me a while to figure this out. Here's my solution.
Note: I'm using fabric, but this should still work in a similar way with forge.
ItemStack handItem = minecraftClient.player.getMainHandStack();
// get the damage of the item in the players main hand (does not include player base damage)
String itemDamageStr = handItem.getAttributeModifiers(EquipmentSlot.MAINHAND).get(EntityAttributes.GENERIC_ATTACK_DAMAGE).toString().replaceFirst(".*?amount=([0-9]+\\.[0-9]+).*", "$1");
Double itemDamage = 0.0;
if(itemDamageStr.matches("[0-9]+\\.[0-9]+")){
itemDamage = Double.parseDouble(itemDamageStr);
}
// get the players damage
Double playerDamage = minecraftClient.player.getAttributes().getValue(EntityAttributes.GENERIC_ATTACK_DAMAGE);
float totalDamage = (float) (itemDamage + playerDamage);
Also, just in case someone finds this helpful, when I was trying to get the player to damage an entity, I had to grab the entity from the server world in order to do anything to it from the client.
ServerWorld serverWorld = minecraftClient.getServer().getWorld(minecraftClient.world.getRegistryKey());
Entity entity = minecraftClient.targetedEntity;
Entity serverEntity = serverWorld.getEntity(entity.getUuid());
I have a rather difficult problem. I am making a topdown 2D game. And I have decided to make an omnidirectional character control like realm of the mad god (Video shows at second 16 what that means). I have it all working fine and have managed to work out almost all the kinks of this sort of camera but one thing remains.
(if you dont know what effect im looking create you can see and example hee at 16 seconds mark: https://youtu.be/N2q6aXkvIiI?t=12s)
When the Camera of the the main client gets rotated more that 180 degrees Left becomes right and right becomes left and my messages to the server about flipping the given character when he is supposed to get inverted. I somewhat fixed this by making an if statement that sends an opposite flip request when your world is completely flipped.
However up and down also become a factor as they dont send requests to flip the character.
What im trying to get to is that I have overcomplicted this script I beleive when trying to get the correct messages accross all clients.
I am wondering if anyone has a logical solution to making sure all chracters on the network are always facing the correct direction at all times.
I am using socket.io and Node.js for speaking to the server.
Any input would be appeciated.
TL;DR
How would you go about making realm of the mad gods camera rotation style when all clients need to know what way everyone is facing. (see video 0:16)
thanks.
I have somewhat fixed this problem with a bit of a rewrite of my logic and managed to make all the magic happen on the client and keep the server out of it entirely. I do not know if what I have done is super effecient as I am rather new to coding.
The logic is that I have created a circle collider2D that represents the players field of view. so things slightly outside the camera view are included. Any collision with an object tagged "otherPlayer" will add them to a list.
I then iterate through the list, if its not empty, and I determine if the object is moving away or coming towards me. (thank you to HigherScriptingAuthority for part of the code for this :: https://forum.unity3d.com/threads/left-right-test-function.31420/).
once I know that, all I have to do is grab the transform of that object and flip it accordingly. Boom it now rotates the object or player correctly no matter what rotation the main client is in.
Hope this makes sense and it helps someone:
private float lastDist = 0;
public float dirNum;
void CheckArea()
{
if (listOfPlayers.Count != 0)
{
foreach(var otherPlayer in listOfPlayers)
{
float distance = (transform.position - otherPlayer.transform.position).magnitude;
if (distance < lastDist)
{
Vector3 heading = otherPlayer.transform.position - transform.position;
dirNum = AngleDir(transform.forward, heading, transform.up);
var objectDirection = AngleDir(transform.forward, heading, transform.up);
if (objectDirection > 0)
{
var nav = otherPlayer.GetComponent<Navigator>();
nav.Left();
}
if (objectDirection < 0)
{
var nav = otherPlayer.GetComponent<Navigator>();
nav.Right();
}
}
if (distance > lastDist)
{
Vector3 heading = otherPlayer.transform.position - transform.position;
dirNum = AngleDir(transform.forward, heading, transform.up);
var objectDirection = AngleDir(transform.forward, heading, transform.up);
if (objectDirection > 0)
{
var nav = otherPlayer.GetComponent<Navigator>();
nav.Right();
}
if (objectDirection < 0)
{
var nav = otherPlayer.GetComponent<Navigator>();
nav.Left();
}
}
lastDist = distance;
}
}
}
Hey am going to give an example of what am trying to do imagine that i have 5 circle sprites and in my gml code i want to do something like this if cirlce_1 was touch then you can touch circle_2 and if circle_2 was touch then you can touch cirlce_3. Please who can help me with this, willing to give a reward via paypal.
Touch events in Game Maker are treated as mouse events. If you want the circles to only allow the player to touch them in order, you can assign each one to have a number and make them all the same object. Take a look at this:
Script to create circles
counter = 0;
lastball = 0;
for(i = 0; i < 10; i++){//Make that third part "i += 1" if using a version before Studio
c = instance_create(floor(random(room_width)), floor(random(room_height)), objCircle);
lastball++;
c.myNum = lastball;
c.radius = 16;//Or whatever radius you want
};
The for statement here automatically generates circles around the room, but if you want manual control, try this:
newCircle()
c = instance_create(argument0, argument1, objCircle);
c.myNum = lastball;
c.radius = 16;
lastball++;
This will create a new circle wherever you want and will automatically increment lastball as well every time it's called. For instance, you could say newCircle(16, 27);.
In the step code for objCircle
if(mouse_check_button_pressed(mb_left) && point_distance(x, y, mouse_x, mouse_y) < radius && counter == myNum){
counter++;//Or counter += 1 in versions before Studio
//Insert whatever circles do when clicked here
};
The circles can be made to do anything when clicked. Since they're all the same object, perhaps you could use a switch statement so each one does something different depending on its number.
Let me know if there's anything else I can help with.
So I am writing a game, but I have come to the part where i need to do some collision response, and I have been stumped. I have an algorithm that finds the objects collision angle, and collision depth meaning how much the two objects over lap. I understand what i want to do and that is to find a perpendicular vector to the collision angle and push back the object that is colliding by it's collision depth, but I just can't seem to write it correctly.
Here is the code I'm working with for the time being.
var collision:Object = collisions[i];
var angle:Number = collision.angle;
var overlap:Number = collision.overlapping.length;
trace(overlap);
trace(angle);
var moveX = Math.cos(angle) * overlap;
var moveY = Math.sin(angle) * overlap;
obj2.x -= moveX;
obj2.y += moveY;
basically I just want the object that is colliding with the wall to stop when it hits it.
any help would be greatly appreciated.
I worked on elastic collision with flash as3 once.I tried to fix overlap a lot of.But i could'nt solved it completely.They did not overlapping normally but if you forced enought, they overlapping.
if you want look at my work, i uploaded my codes.You can download and look at my code.
And if you solve this problem completely, please tell me solution.
swf(with friction, it's more problem) : http://nafiz.in/collision/carpisma.swf
swf(without friction, it's little problem than first.) : http://nafiz.in/collision/carpisma_surtunmesiz.swf
q : add a ball at mouse location.
w, a,s,d : controll #1 ball.
Click with mouse without relase and move mouse and relase. You selected balls.
When you press space, selected balls will go mouse location.
Cods : http://nafiz.in/collision/collision.rar
i hope you solve.
So after a few hours of tweaking the code, I came up with the solution that works well. here is my new code:
public function Colisions(obj1,obj2) {
var collisions:Array=MyCollision.checkCollisions();
for (var i = 0; i < collisions.length; i++) {
var collision:Object=collisions[i];
var angle:Number=collision.angle;
var overlap:Number=collision.overlapping.length;
// finds the amount in x and y coordinates to move the ball back, and it devides overlap by 20 so that the ball does not jump as much.
var moveX=Math.cos(angle)*(overlap/20);
var moveY=Math.sin(angle)*(overlap/20);
// sets the ball to it's original location before the colision.
obj2.x=obj2.x-moveX;
obj2.y=obj2.y-moveY;
}
}
just as a side note I am using CDK which stands for the collision detection toolkit as the algorithm that finds the collisions and the info associated with the collisions.
I'm adding sqlite support to a my Google Chrome extension, to store historical data.
When creating the database, it is required to set the maximum size (I used 5MB, as suggested in many examples)
I'd like to know how much memory I'm really using (for example after adding 1000 records), to have an idea of when the 5MB limit will be reached, and act accordingly.
The Chrome console doesn't reveal such figures.
Thanks.
You can calculate those figures if you wanted to. Basically, the default limit for localStorage and webStorage is 5MB where the name and values are saved as UTF16 therefore it is really half of that which is 2.5 MB in terms of stored characters. In webStorage, you can increase that by adding "unlimited_storage" within the manifest.
Same thing would apply in WebStorage, but you have to go through all tables and figure out how many characters there is per row.
In localStorage You can test that by doing a population script:
var row = 0;
localStorage.clear();
var populator = function () {
localStorage[row] = '';
var x = '';
for (var i = 0; i < (1024 * 100); i++) {
x += 'A';
}
localStorage[row] = x;
row++;
console.log('Populating row: ' + row);
populator();
}
populator();
The above should crash in row 25 for not enough space making it around 2.5MB. You can do the inverse and count how many characters per row and that determines how much space you have.
Another way to do this, is always adding a "payload" and checking the exception if it exists, if it does, then you know your out of space.
try {
localStorage['foo'] = 'SOME_DATA';
} catch (e) {
console.log('LIMIT REACHED! Do something else');
}
Internet Explorer did something called "remainingSpace", but that doesn't work in Chrome/Safari:
http://msdn.microsoft.com/en-us/library/cc197016(v=VS.85).aspx
I'd like to add a suggestion.
If it is a Chrome extension, why not make use of Web SQL storage or Indexed DB?
http://html5doctor.com/introducing-web-sql-databases/
http://hacks.mozilla.org/2010/06/comparing-indexeddb-and-webdatabase/
Source: http://caniuse.com/