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pixelbattle
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fixed and added a lot of things

This commit is contained in:
leca 2023-07-31 16:47:36 +03:00
parent 6a1f368f37
commit 7a1537ddfa
1 changed files with 162 additions and 81 deletions
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119
index.html
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@ -3,21 +3,29 @@
<head>
<title>Pixel Battle</title>
<meta charset="UTF-8">
</head>
<body>
<p>
<input type="color" id="color" />
<input type="button" id="submitColor" value="change color" onclick="changeColor()"/>
</p>
<canvas id="board" width="1920" height="1080" style="border:1px solid #000000;" display="block">
</canvas>
<canvas hidden id="hidden" width="1920" height="1080" style="border:1px solid #000000;" display="block">
</canvas>
<script>
var canvas = document.getElementById("board");
var colorInput = document.getElementById("color");
var canvasHidden = document.getElementById("hidden");
var ctx = canvas.getContext("2d");
var ctx2 = canvasHidden.getContext("2d");
var currentColor = "#000000"
canvas.width = 1920;
canvas.height = 1080;
canvasHidden.width = 1920;
canvasHidden.height = 1080;
var imgData = ctx2.createImageData(canvasHidden.width, canvasHidden.height)
imgData.data.fill(255);
// All the code that is making zooms and moving around cavnas is made with big help of http://phrogz.net/tmp/canvas_zoom_to_cursor.html. Thanks alot!
window.onload = function() {
@ -28,20 +36,30 @@
ctx.setTransform(1,0,0,1,0,0);
ctx.clearRect(0,0,canvas.width,canvas.height);
ctx.restore();
for (let i = 0; i < 1000; i += 4) {
imgData.data[i+0] = 255;
imgData.data[i+1] = 0;
imgData.data[i+2] = 0;
imgData.data[i+3] = 255;
}
ctx2.putImageData(imgData, 10, 50);
ctx2.putImageData(imgData, 0, 0);
ctx.drawImage(canvasHidden, 0, 0)
ctx.imageSmoothingEnabled = false
}
function drawPixel(x, y) {
let pixelNumber;
if (y > 0)
pixelNumber = (y) * canvas.width + x
if (y == 0)
pixelNumber = x
// for (let l = 0; l < 5; l ++)
// for (let i = 0; i < 4; i ++)
// imgData.data[pixelNumber+i] = 127
let rgbColor = hexToRgb(currentColor);
for (let l = 0; l < 5; l ++){
imgData.data[pixelNumber + 0] = rgbColor.r;
imgData.data[pixelNumber + 1] = rgbColor.g;
imgData.data[pixelNumber + 2] = rgbColor.b;
imgData.data[pixelNumber + 3] = 255;
}
function drawPixel(x, y, color) {
let pixelNumber = y * canvas.width + x // THIS IS NOT CORRECT. MUST BE FIXED
for (let i = 0; i < 4; i ++)
imgData.data[pixelNumber+i] = color[i]
redraw();
}
@ -50,12 +68,13 @@
var lastX=canvas.width/2, lastY=canvas.height/2;
var dragStart,dragged;
canvas.addEventListener('mousedown',function(evt){
if (evt.button == 1 || 1 == evt.button&2){
document.body.style.mozUserSelect = document.body.style.webkitUserSelect = document.body.style.userSelect = 'none';
lastX = evt.offsetX || (evt.pageX - canvas.offsetLeft);
lastY = evt.offsetY || (evt.pageY - canvas.offsetTop);
dragStart = ctx.transformedPoint(lastX,lastY);
dragged = false;
}
},false);
canvas.addEventListener('mousemove',function(evt){
lastX = evt.offsetX || (evt.pageX - canvas.offsetLeft);
@ -68,13 +87,44 @@
}
},false);
canvas.addEventListener('mouseup',function(evt){
if (evt.button == 1 || 1 == evt.button&2){
dragStart = null;
if (dragged) {
if (!dragged) drawPixel(
Math.round(ctx.transformedPoint(lastX,lastY).x),
Math.round(ctx.transformedPoint(lastX,lastY).y)
)
// if (!dragged) zoom(evt.shiftKey ? -1 : 1 );
let point = ctx.transformedPoint(
evt.clientX - canvas.offsetLeft,
evt.clientY - canvas.offsetTop
);
} else {
let point = {
x: Math.floor(ctx.transformedPoint(lastX,lastY).x) * 4,
y: Math.floor(ctx.transformedPoint(lastX,lastY).y) * 4,
};
x = point.x; y = point.y;
let pixelNumber;
if (y > 0)
pixelNumber = (y) * canvas.width + x
if (y == 0)
pixelNumber = x
let color = {
r: imgData.data[pixelNumber + 0],
g: imgData.data[pixelNumber + 1],
b: imgData.data[pixelNumber + 2]
};
console.log(`${rgbToHex(color.r, color.g, color.b)}`)
changeColor(rgbToHex(
color.r, color.g, color.b
));
}
} else if (evt.button == 0) {
for (let l = 0; l < 4; l ++)
drawPixel(
Math.floor(ctx.transformedPoint(lastX,lastY).x) * 4,
Math.floor(ctx.transformedPoint(lastX,lastY).y) * 4
);
}
},false);
var scaleFactor = 1.1;
@ -96,6 +146,37 @@
canvas.addEventListener('mousewheel',handleScroll,false);
};
function changeColor() {
}
function changeColor(color) {
if (color == undefined) currentColor = colorInput.value;
else currentColor = color
}
//Code from https://stackoverflow.com/questions/5623838/rgb-to-hex-and-hex-to-rgb#5624139
function hexToRgb(hex) {
// Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
hex = hex.replace(shorthandRegex, function(m, r, g, b) {
return r + r + g + g + b + b;
});
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : null;
}
const rgbToHex = (r, g, b) => '#' + [r, g, b].map(x => {
const hex = x.toString(16)
return hex.length === 1 ? '0' + hex : hex
}).join('')
function trackTransforms(ctx){
var svg = document.createElementNS("http://www.w3.org/2000/svg",'svg');
var xform = svg.createSVGMatrix();