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peow.js
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peow.js
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var canvas = document.getElementById("myCanvas");
var c = canvas.getContext("2d");
var dimension = [document.documentElement.clientWidth, document.documentElement.clientHeight];
// var meowImage = new Image();
// meowImage.src = "https://static.pexels.com/photos/34950/pexels-photo.jpg";
// canvas.width = 1280;
// canvas.height = 720;
canvas.width = dimension[0];
canvas.height = dimension[1];
function Cube(x, y, width, height, speed, color)
{
var foo = 25;
this.x = x;
this.y = y;
this.width = width;
this.height = height;
this.speedX = speed;
this.speedY = speed;
this.color = color;
this.draw = function ()
{
foo = 23;
c.fillStyle = this.color;
c.fillRect(this.x, this.y, this.width, this.height)
}
this.update = function (move = true)
{
if (move == true)
{
if (this.x > canvas.width - this.width || this.x < 0)
this.speedX = -this.speedX;
this.x += this.speedX;
if (this.y > canvas.height - this.height || this.y < 0)
this.speedY = -this.speedY;
this.y += this.speedY;
}
this.draw();
}
}
// function getMousePosition(e)
// {
// var mouseX = e.offsetX * canvas.width / canvas.clientWidth | 0;
// var mouseY = e.offsetY * canvas.height / canvas.clientHeight | 0;
// return { x: mouseX, y: mouseY };
// }
var canvasPos = getPosition(canvas);
var mouseX = 0;
var mouseY = 0;
canvas.addEventListener("mousemove", setMousePosition, false);
function setMousePosition(e)
{
mouseX = e.clientX - canvasPos.x;
mouseY = e.clientY - canvasPos.y;
}
// deal with the page getting resized or scrolled
window.addEventListener("scroll", updatePosition, false);
window.addEventListener("resize", updatePosition, false);
function updatePosition()
{
canvasPos = getPosition(canvas);
dimension = [document.documentElement.clientWidth, document.documentElement.clientHeight];
canvas.width = dimension[0];
canvas.height = dimension[1];
drawGrid();
}
// Helper function to get an element's exact position
function getPosition(el)
{
var xPos = 0;
var yPos = 0;
while (el)
{
if (el.tagName == "BODY")
{
// deal with browser quirks with body/window/document and page scroll
var xScroll = el.scrollLeft || document.documentElement.scrollLeft;
var yScroll = el.scrollTop || document.documentElement.scrollTop;
xPos += (el.offsetLeft - xScroll + el.clientLeft);
yPos += (el.offsetTop - yScroll + el.clientTop);
}
else
{
// for all other non-BODY elements
xPos += (el.offsetLeft - el.scrollLeft + el.clientLeft);
yPos += (el.offsetTop - el.scrollTop + el.clientTop);
}
el = el.offsetParent;
}
return {
x: xPos,
y: yPos
};
}
// var cube1 = new Cube(20, 20, 20, 20, 20, 'red');
// var cube2 = new Cube(300, 300, 100, 100, 20, 'blue');
// var cube3 = new Cube(250, 100, 10, 10, -3.1, 'orange');
// var cube4 = new Cube(100, 100, 10, 10, 3.1, 'cyan');
// var cube5 = new Cube(100, 500, 15, 100, 5, 'purple');
// var cube6 = new Cube(700, 100, 100, 10, 5, 'green');
var cubeList = [
new Cube(20, 20, 20, 20, 20, 'red'),
new Cube(50, 20, 20, 20, 20, 'blue'),
new Cube(300, 300, 100, 100, 20, 'blue'),
new Cube(250, 100, 10, 10, -3.1, 'orange'),
new Cube(100, 100, 10, 10, 3.1, 'cyan'),
new Cube(100, 500, 15, 100, 5, 'purple'),
new Cube(700, 100, 100, 10, 5, 'green')];
function updateObjects()
{
for (let i = 0; i < cubeList.length; i++)
{
cubeList[i].update();
}
// cube1.update();
// cube2.update();
// cube3.update(false);
// cube4.update();
// cube5.update();
// cube6.update();
}
function getDistance(x1, y1, x2, y2)
{
var xDistance = x2 - x1;
var yDistance = y2 - y1;
return Math.sqrt(Math.pow(xDistance, 2) + Math.pow(yDistance, 2))
}
function checkColision(obj1, obj2)
{
if (obj1.x + obj1.width < obj2.x || obj1.x > obj2.x + obj2.width ||
obj1.y + obj1.height < obj2.y || obj1.y > obj2.y + obj2.height)
{
obj1.color = 'green';
obj2.color = 'green';
}
else
{
obj1.color = 'red';
obj2.color = 'red';
}
}
var step = 50;
function drawGrid()
{
// c.fillStyle = 'rgba(100,155,255,1)';
// c.fillRect(0, 0, canvas.width, canvas.height);
// for (let i = 0; i < canvas.width; i += step)
// {
// for (let j = 0; j < canvas.height; j += step)
// {
// c.fillStyle = 'hsl(' + 360 * Math.random() + ', 50%, 50%)';
// c.fillStyle =
// 'rgba(' + Math.round(Math.random() * 255) +
// ',' + Math.round(Math.random() * 255) +
// ',180,1)';
// c.fillStyle = 'rgba(47,48,65,1)';
// c.fillRect(i, j, i + step, j + step);
// }
// }
//testing something , also drawing all the screen at once instead of drawing pixel by pixel
c.fillStyle = 'rgba(47,48,65,1)';
c.fillRect(0, 0, canvas.width, canvas.height);
}
// setInterval(drawGrid, 500);
drawGrid();
function animate()
{
requestAnimationFrame(animate);
expandFire();
// drawGrid();
// var distance = getDistance(cube3.x, cube3.y, cube4.x, cube4.y);
// cubeList[2].x = mouseX - cubeList[2].width / 2;
// cubeList[2].y = mouseY - cubeList[2].height / 2;
// for (let i = 0; i < cubeList.length - 1; i++)
// {
// checkColision(cubeList[i], cubeList[i + 1]);
// }
// c.drawImage(meowImage, 0, 0, 1000, 800);
// updateObjects();
}
animate();
canvas.addEventListener("mousemove", drawCubeAtMousePos, false);
function drawCubeAtMousePos(e)
{
c.fillStyle = 'rgba(74,78,105,1)';
var aX = Math.floor(Math.floor(mouseX) % step);
var aY = Math.floor(Math.floor(mouseY) % step);
var drawPositionX = Math.floor(mouseX) - aX;
var drawPositionY = Math.floor(mouseY) - aY;
c.fillRect(drawPositionX, drawPositionY, step, step, 1);
}
function createArrayOfImageData()
{
var newArray = [];
var x = 0;
var y = 0;
for (let i = 0; i < canvas.width; i += step)
{
newArray.push([]);
y = 0;
for (let j = 0; j < canvas.height; j += step)
{
newArray[x].push(c.getImageData(i, j, 1, 1).data[0]);
y += 1;
// newArray[i].push(c.getImageData(i, j, 1, 1).data[0]);
}
x += 1;
}
// console.log(newArray);
return newArray;
}
// var arrayN = createArrayOfImageData();
function expandFire()
{
var arrayN = createArrayOfImageData();
var maxWidth = Math.floor(canvas.width / step);
var maxHeight = Math.floor(canvas.height / step);
var x = 0;
var y = 0;
c.fillStyle = 'rgba(78,78,105,1)';
for (let i = 0; i < canvas.width; i += step)
{
y = 0;
for (let j = 0; j < canvas.height; j += step)
{
// var pixelData = c.getImageData(i, j, 1, 1).data;
// if (pixelData[0] == 74)
if (arrayN[x][y] == 74)
{
// c.fillStyle = 'rgba(203,23,23,23)';
// c.fillRect(i, j, step, step, 1);
// if (c.getImageData(i - step, j, 1, 1).data[0] == 47)
if (x > 0)
{
if (arrayN[x - 1][y] == 47)
{
c.fillRect(i - step, j, step, step, 1);
}
}
// if (c.getImageData(i + step, j, 1, 1).data[0] == 47)
if (x < maxWidth)
if (arrayN[x + 1][y] == 47)
{
c.fillRect(i + step, j, step, step, 1);
}
// if (c.getImageData(i, j - step, 1, 1).data[0] == 47)
if (y > 0)
{
if (arrayN[x][y - 1] == 47)
{
c.fillRect(i, j - step, step, step, 1);
}
}
if (y < maxHeight)
{
// if (c.getImageData(i, j + step, 1, 1).data[0] == 47)
if (arrayN[x][y + 1] == 47)
{
c.fillRect(i, j + step, step, step, 1);
}
}
}
y += 1;
}
x += 1;
}
x = 0;
c.fillStyle = 'rgba(74,78,105,1)';
for (let i = 0; i < canvas.width; i += step)
{
y = 0;
for (let j = 0; j < canvas.height; j += step)
{
// var pixelData = c.getImageData(i, j, 1, 1).data;
// if (pixelData[0] == 78)
if (arrayN[x][y] == 78)
{
c.fillRect(i, j, step, step, 1);
}
y += 1;
}
x += 1;
}
}
// setInterval(expandFire, 50);
canvas.addEventListener("mousedown", expandFire, false);