So, i have started building a game 2d just a few day so its make me so confuse with some reason of the movement character in the tilemap.In my tilemap, every per tiles2 is have the width and height 16px and the whole map is 800 x 1250, every movement of my character will add/sub 1 in per step, when I calculating detection collisions, the position became wrong position specifically when character move a step then the position return to far though i try to divide 16 px in every movement of character.
This is my movement:
this.setting_walking_speed = 3 ;
if (this.player.control_direction[0] == 1) {
this.player.x -= this.setting_walking_speed;
this.player.walking = 1;
this.player.direction = 0;
} else if (this.player.control_direction[1] == 1) {
this.player.y -= this.setting_walking_speed;
this.player.walking = 1;
this.player.direction = 2;
} else if (this.player.control_direction[2] == 1) {
this.player.x += this.setting_walking_speed;
this.player.walking = 1;
this.player.direction = 1;
} else if (this.player.control_direction[3] == 1) {
this.player.y += this.setting_walking_speed;
this.player.walking = 1;
this.player.direction = 3;
}
var posf = {
x:Math.floor( this.player.y /16 ) ,
y:Math.floor( this.player.x /16 )
};
this.collide(posf);
console.log(posf.x , posf.y);
}
And the collision function is:
The this.setting_minblocksize\[k\] = 16;
this.bound = this.draw_collision();
function rectangularCollision({rect1, rect2 }) {
return (
rect1.x >= rect2.x &&
rect1.x <= rect2.x &&
rect1.y <= rect2.y &&
rect1.y >= rect2.y
)
}
this.collide = function(player){
// console.log(this.bound);
this.bound.forEach((boundaries) => {
if(
rectangularCollision({,
rect1: player,
rect2: boundaries
})
){
console.log('collide');
}
})
}
this.draw_collision = function () {
var obj = [];
this.ctxt.clearRect(0, 0, canvas.width, canvas.height);
for (var i = 0; i < canvas.height; i++) {
for (var j = 0; j < canvas.width; j++) {
var data = 0;
if (i >= 0 && j >= 0 && i < this.map.layers[1].height && j < this.map.layers[1].width) {
var data = this.map.layers[1].data[i * this.map.layers[1].width + j];
for (var k = 0; k < 1; k++) {
this.ctxt.fillStyle = 'red';
if (data != 0) {
obj.push({
x: j ,
y: i
});
this.ctxt.fillRect(
(j * this.setting_minblocksize[k]) ,
(i * this.setting_minblocksize[k]) ,
this.setting_minblocksize[k],
this.setting_minblocksize[k]
);
}
}
}
}
}
return obj;
}
My codepen link is right here
Thank you all for helping me!
Related
I would love to make a macro that helps me average 7 values from 7 different cells(currently placeholders) but only when those are greater than 0, it should be fairly simple but I'm not an expert in JS just yet.
function macro1(){
var total = 0;
var ess = [];
ess[0] = 0;
ess[1] = 1;
ess[2] = 0;
ess[3] = 2;
ess[4] = 0;
ess[5] = 3;
ess[6] = 0;
if (ess[0] >= 1){
(total++)
}
if (ess[1] >= 1){
(total++)
}
if (ess[2] >= 1){
(total++)
}
if (ess[3] >= 1){
(total++)
}
if (ess[4] >= 1){
(total++)
}
if (ess[5] >= 1){
(total++)
}
if (ess[6] >= 1){
(total++)
}
if (total <= 0){
( total++ )
}
var avg = ( ess[0] + ess[1] + ess[2] + ess[3] + ess[4] + ess[5] + ess[6] ) / ( total );
console.log(avg);
}
Try this:
function macro1(){
var total= 0, count = 0;
var ess = [0, 1, 0, 2, 0, 3, 0];
for( x in ess ){
if(ess[x] > 0){
total += ess[x];
count++;
}
}
var avg = total / count;
console.log(avg);
}
I am new to stack and not quite sure how to use it. But here I am. I am working on a ecosystem project, and I have an animal class with 2 different genders(0 for female, 1 for male). When 2 different genders intersect each other than I want to remove those 2 objects and add a couple(different object, static) object on that position. I kinda did it but it only works for a couple of seconds. Then the code just breaks. In the console it says,
“Uncaught TypeError: Cannot read property ‘intersects’ of undefined”
Here's the question on the processing forum in case I get a solution which might help others: https://discourse.processing.org/t/multiple-object-intersection-and-removal/22900/2
Here's the sketch.js file:
var animats = [];
var couples = [];
function setup() {
frameRate(30);
createCanvas(displayWidth, 470);
for(var i = 0; i < 50; i++)
{
animats[i] = new Animat(random(0, width), random(0, height));
}
}
function draw() {
background(255,100,100);
for(var i = animats.length-1; i >= 0; i--) {
animats[i].birth();
animats[i].grow();
for(var j = i; j >= 0; j--) {
if(j != i && animats[i].intersects(animats[j])) {
animats.splice(i, 1);
animats.splice(j, 1);
}
}
}
}
Here's the animat class file:
function Animat(x, y) {
this.x = x;
this.y = y;
this.gender;
var g = random(0,1);
var c;
if(g > 0.5) {
c = 0;
this.gender = 0;
} else {
c = 255;
this.gender = 1;
}
this.speed = 1;
this.age = 0;
this.length = 0.5;
this.birth = function() {
//gender
//create
noStroke();
fill(c);
text("n", this.x, this.y, this.length, this.length);
ellipse(this.x, this.y, this.length * 2, this.length * 2);
//move
switch(floor(random(0,4))) {
case 0:
this.x += this.speed;
break;
case 1:
this.y += this.speed;
break;
case 2:
this.x -= this.speed;
break;
case 3:
this.y -= this.speed;
break;
default:
this.x++;
this.y--;
}
//bounce
if(this.x > width || this.x < 4){
this.speed *= -1;
}
if(this.y > height || this.y < 4){
this.speed *= -1;
}
}
this.grow = function() {
this.age += 0.01;
this.length += 0.05;
//age checks
if(this.age > 10) {
this.speed + 5;
} else if(this.age > 21) {
this.length = 25;
this.speed = this.speed
//console.log("max age:" + this.age)
} else if(this.age > 70) {
//die
} else {
}
//length checks
if(this.length > 25) {
this.length = 25;
//console.log("max length");
}
}
//relationship
this.intersects = function(other) {
var d = dist(this.x, this.y, other.x, other.y);
var r = this.length + other.length;
if(d < r) {
if(((this.gender == 0) && (other.gender == 1)) || ((this.gender == 1) && (other.gender == 0))) {
return true;
} else {
this.speed *= -1;
}
} else {
return false;
}
}
//mate
this.couple = function() {
if(((this.gender == 0) && (other.gender == 1)) || ((this.gender == 1) && (other.gender == 0))) {
return true;
} else {
this.speed *= -1;
}
}
//die
/*this.die = function() {
if(this.age > 50) {
return true;
} else {
return false;
}
}*/
}
Here's the codepen link for results I am getting:
https://codepen.io/AbrarShahriar/pen/XWXwLPM
Try changing your nested for loop to:
for (var i = animats.length - 1; i >= 0; i--) {
animats[i].birth();
animats[i].grow();
for (var j = i; j >= 0; j--) {
if (j != i && animats[i].intersects(animats[j])) {
animats.splice(i, 1);
animats.splice(j, 1);
break; //exit the inner loop after a match
}
}
}
In other words, add a break; after two animats have coupled and have been removed from the array. The error was probably caused by you trying to call the intersects method of an animat that had already been removed.
you need to keep animats[i] as long as the for-loop for j has not finished.
Here the code you need to fix:
for(var i = animats.length-1; i >= 0; i--) {
animats[i].birth();
animats[i].grow();
let remove = false; // mark 'i' as NOT REMOVE by default
for(var j = i; j >= 0; j--) {
if(j != i && animats[i].intersects(animats[j])) {
remove = true; // mark 'i' as to remove when collision detected
animats.splice(j, 1);
}
}
if (remove) { // remove 'i' after compared to all 'j'
animats.splice(i, 1);
}
}
I am trying to implement John Conway's Game of Life in HTML using canvas and JavaScript.
In a 2D array I store the cell's x-y position and state (alive or dead).
I avoid the outer most cells to avoid having to worry about boundary conditions.
Using requestAnimationFrame, I clear the canvas, update the cells for the next generation based on the number of neighbors, then draw them.
I console log the states of the cells, which do change but for some reason they don't get updated in the canvas.
I have already used this link for reference, but to no avail:
Canvas: X value changing in console but not in canvas
Here is the JavaScript code:
var cv = document.querySelector('#cv');
var c = cv.getContext('2d');
var h = cv.height;
var w = cv.width;
//Cell class
function Cell(alive, x, y) {
this.alive = alive;
this.x = x;
this.y = y;
this.draw = function () {
//c.beginPath();
this.x = x;
this.y = y;
if(alive == true) {
c.fillStyle = 'black';
c.fillRect(this.x, this.y, 10, 10);
}
else if(alive == false){
c.fillStyle = 'white';
c.fillRect(this.x, this.y, 10, 10);
}
//c.stroke();
}
}
//2d array to contain Cell objects
var cellArray = new Array(100);
for (var i = 0; i < cellArray.length; i++) {
cellArray[i] = new Array(70);
}
//initial drawing
for(var i = 0; i < cellArray.length; i++) {
for(var j = 0; j < 100; j++) {
var b = Math.round(Math.random() - 0.4);
if(b == 1) {
cellArray[i][j] = new Cell(true, i * 10, j * 10);
cellArray[i][j].draw();
}
else {
cellArray[i][j] = new Cell(false, i * 10, j * 10);
cellArray[i][j].draw();
}
}
}
//find number of neghbor cells
function neighborSum(cell, i, j) {
this.cell = cell;
this.i = i;
this.j = j;
var sum = 0;
if(cellArray[i - 1][j - 1].alive == true) {
sum += 1;
}
if(cellArray[i][j - 1].alive == true) {
sum += 1;
}
if(cellArray[i - 1][j].alive == true) {
sum += 1;
}
if(cellArray[i + 1][j - 1].alive == true) {
sum += 1;
}
if(cellArray[i - 1][j + 1].alive == true) {
sum += 1;
}
if(cellArray[i + 1][j].alive == true) {
sum += 1;
}
if(cellArray[i][j + 1].alive == true) {
sum += 1;
}
if(cellArray[i + 1][j + 1].alive == true) {
sum += 1;
}
return sum;
}
//animate function
function play() {
requestAnimationFrame(play);
c.clearRect(0, 0, w, h);
//check surrounding neighbor cells
for(var i = 1; i < cellArray.length - 1; i++) {
for(var j = 1; j < 70 - 1; j++) {
if( cellArray[i][j].alive == true && ( neighborSum(cellArray[i][j], i, j) > 3 || neighborSum(cellArray[i][j], i, j) < 2 ) ) {
cellArray[i][j].alive = false;
}
else if( cellArray[i][j].alive == true && ( neighborSum(cellArray[i][j], i, j) == 3 || neighborSum(cellArray[i][j], i, j) == 2 ) ) {
cellArray[i][j].alive = true;
}
else if(cellArray[i][j].alive == false && neighborSum(cellArray[i][j], i, j) == 3 ) {
cellArray[i][j].alive = true;
}
}
}
//console.log(cellArray)
//redraw cells alive or dead
for(var i = 1; i < cellArray.length - 1; i++) {
for(var j = 1; j < 70 - 1; j++) {
cellArray[i][j].draw();
}
}
}
requestAnimationFrame(play);
Here is a JSFiddle: https://jsfiddle.net/ew3046st/1/
Okay, so I was able to fix the problem by removing the draw() function and instead I just directly call the fillRect() function in the requestAnimationFrame function. Also, fixed the behavior of the cells by adding another 2d array of the same size to store the state of the cells for the next generation:
...
for(var i = 1; i < cellArray.length - 1; i++) {
for(var j = 1; j < 70 - 1; j++) {
//cellArray[i][j].draw();
c.beginPath();
//cellArray[i][j].draw();
if(cellArray[i][j].alive == true) {
c.fillStyle = 'black';
c.fillRect(cellArray[i][j].x, cellArray[i][j].y, 10, 10);
}
else if(cellArray[i][j].alive == false){
c.fillStyle = 'white';
c.fillRect(cellArray[i][j].x, cellArray[i][j].y, 10, 10);
}
c.stroke();
}
}
...
Here is a working jsfiddle: https://jsfiddle.net/e7u19xpq/1/
I have this code below, and I'm having a hard time solving this one.
On dotime function, i have the ball speed:
/* HERE */
function dotime() {
move1();
if (myform != null) {
myform.text3.value = display1();
myform.score.value = "" + score;
}
/* ---Ball Speed--- */
if (!oops_flag) timerID = setTimeout("dotime()", 190);
/* ---trying to make ball speed faster--- */
if (score == 1) {
timerID = setTimeout("dotime()", 100 - 30);
}
timerRunning = true;
}
I tried to make the ball move faster but when i do the second "if", the ball just flying too fast.
Thanks in advance,
fufle.
full code:
var crlf = "\r\n";
var x = 0;
var y = 0;
var dx = 1;
var dy = 1;
var s = "";
var u = 0;
var oops_flag = false;
var score = 0;
function move1() {
x += dx;
if (x > 61) {
x -= 2 * Math.abs(dx);
if (dx > 0) dx = -dx;
}
if (x < 0) {
x += 2 * Math.abs(dx);
if (dx < 0) dx = -dx;
}
y += dy;
if (y > 24) {
y -= 2 * Math.abs(dy);
if (dy > 0) dy = -dy;
if (Math.abs(x - 2 * u - 1) > 2) {
oops_flag = true;
} else {
score += 1;
}
}
if (y < 0) {
y += 2 * Math.abs(dy);
if (dy < 0) dy = -dy;
}
}
function display1() {
var s1 = ""
var i, j;
if (oops_flag) return " Unlucky, Play again?"
for (j = 0; j < 25; j++) {
for (i = 0; i < 62; i++) {
/* BALL */
if (j == y && i == x) s1 += "🔴";
else s1 += " ";
}
s1 += crlf;
}
/* DEFENDER */
var s2 = "";
for (i = 0; i < 31; i++) {
if (u == i) s2 += "▄▄▄▄▄";
else s2 += " ";
}
return (s1 + s2);
}
var timerID = null;
var timerRunning = false;
var myform;
function stopclock() {
if (timerRunning) clearTimeout(timerID);
timerRunning = false;
}
function startclock(form) {
myform = form;
oops_flag = false;
score = 0;
if (navigator.userAgent.indexOf("Mac") > 2) crlf = "\n";
stopclock();
dotime();
// var id= setInterval(frameElement,10000);
}
/* HERE */
function dotime() {
move1();
if (myform != null) {
myform.text3.value = display1();
myform.score.value = "" + score;
}
if (!oops_flag) timerID = setTimeout("dotime()", 100);
if (score == 1) {
timerID = setTimeout("dotime()", 100 - 30);
}
timerRunning = true;
}
Looks like you have two timers running so you need to make it so only one will run.
if (!oops_flag) {
var speed = 100;
if (score===1) speed = 70;
timerID = setTimeout(dotime, speed);
}
or with a ternary operator
if (!oops_flag) {
var speed = (score===1) ? 70 : 100;
timerID = setTimeout(dotime, speed);
}
I am trying to generate a random grid of connected paths. The image below shows how far I've managed to get it:
The rules that the grid needs to adhere to are the following:
all the paths must connect to each other in some way but there can be dead ends
there can be no blocks that have no connections (i.e. can't be reached)
the blocks on the edge must have paths that point inward, not outward.
As you can see in my image, my code isn't quite right, but I can't find the error.
Here is a fiddle with the code: jsfiddle.net/thatOneGuy/jz5sfr00/1
But I think my mistake is in this function:
function linkAll() {
for (var x = 0; x < 9; x++) {
for (y = 0; y < 9; y++) {
//link up to each other
var count = 0;
if ((x > 0) && (y > 0)) {
if (hz[x - 1][y].right) {
hz[x][y].left = 1;
} else count++;
if (hz[x][y - 1].bottom) {
hz[x][y].top = 1;
} else count++;
}
if ((x < 9) && (y < 9)) {
if (hz[x + 1][y].left) {
hz[x][y].right = 1;
} else count++;
if (hz[x][y + 1].top) {
hz[x][y].bottom = 1;
} else count++;
}
if (count == 4) {
var newPath = getDirection(getRandomInt(0, 3));
if (newPath == 'top') {
hz[x][y - 1].bottom = 1
hz[x][y].top = 1;
} else if (newPath == 'left') {
hz[x - 1][y].right = 1;
hz[x][y].left = 1;
} else if (newPath == 'bottom') {
hz[x][y + 1].top = 1;
hz[x][y].bottom = 1;
} else if (newPath == 'right') {
hz[x + 1][y].left = 1;
hz[x][y].right = 1;
}
}
} //end for (y)
} //end for (x)
}
UPDATE:
I realised that I confused the x and y values of the array. They should have been swopped.
So I added a linkEdges() function so that the edge blocks all link together:
function linkEdges(){
for(var x = 0; x < 10; x++){
for(var y = 0; y < 10; y++){
if((x==0) && (y > 0) && (y < 9)){
if(hz[0][y-1].right){
//console.log(x + ' ' + y + ' y-1 = 1');
//console.log('Inside (y-1) ');
//console.log(hz[x][y]);
if (hz[0][y].left != null)
{
hz[0][y].left = 1;
}
}
}
if ((y==0) && (x > 0)){
if(hz[x-1][0].bottom){
if(hz[x][0].top != null)
hz[x][0].top = 1;
}
}
if ((y==9) && (x < 9) && (x > 0)){
if(hz[x+1][9].top){
if(hz[x][9].bottom != null)
hz[x][9].bottom = 1;
}
}
if ((x==9) && (y < 9)){
if(hz[9][y+1].left){
if(hz[9][y].right != null)
hz[9][y].right = 1;
}
}
} //end for(y)
}//end for(x)
}
I also updated the linkAll() function:
function linkAll(){
for(var x=0; x < 9; x++){
for(var y=0; y < 9; y++){
//link up to each other
var count = 0;
if((x > 0) && (y > 0)){
if(hz[x-1][y].bottom){
hz[x][y].top = 1;
}
else count++;
if(hz[x][y-1].right){
hz[x][y].left = 1;
}
else count++;
}
if((x < 9) && (y < 9)){
if(hz[x+1][y].top){
hz[x][y].bottom = 1;
}
else count++;
if(hz[x][y+1].left){
hz[x][y].right = 1;
}
else count++;
}
if(count == 4){
//console.log('x: ' + x + ' y: '+y);
var newPath = getDirection(getRandomInt(0, 3));
//console.log(newPath);
if(newPath == 'top'){
hz[x][y-1].right = 1
hz[x][y].left = 1;
}
else if(newPath == 'left'){
hz[x-1][y].bottom = 1;
hz[x][y].top = 1;
}
else if(newPath == 'bottom'){
hz[x][y+1].left = 1;
hz[x][y].right = 1;
}
else if(newPath == 'right'){
hz[x+1][y].top = 1;
hz[x][y].bottom = 1;
}
}
}//end for (y)
}//end for (x)
}
My grid now looks like this:
I just don't know how to connect those last few edges. I think it has something to do with my linkEdges() function.