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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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243
index.html
View File

@ -3,22 +3,30 @@
<head> <head>
<title>Pixel Battle</title> <title>Pixel Battle</title>
<meta charset="UTF-8"> <meta charset="UTF-8">
</head> </head>
<body> <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 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 hidden id="hidden" width="1920" height="1080" style="border:1px solid #000000;" display="block">
</canvas> </canvas>
<script> <script>
var canvas = document.getElementById("board"); var canvas = document.getElementById("board");
var colorInput = document.getElementById("color");
var canvasHidden = document.getElementById("hidden"); var canvasHidden = document.getElementById("hidden");
var ctx = canvas.getContext("2d"); var ctx = canvas.getContext("2d");
var ctx2 = canvasHidden.getContext("2d"); var ctx2 = canvasHidden.getContext("2d");
var currentColor = "#000000"
canvas.width = 1920; canvas.width = 1920;
canvas.height = 1080; canvas.height = 1080;
canvasHidden.width = 1920;
canvasHidden.height = 1080;
var imgData = ctx2.createImageData(canvasHidden.width, canvasHidden.height) 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! // 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() { window.onload = function() {
var ctx = canvas.getContext("2d"); var ctx = canvas.getContext("2d");
@ -28,20 +36,30 @@
ctx.setTransform(1,0,0,1,0,0); ctx.setTransform(1,0,0,1,0,0);
ctx.clearRect(0,0,canvas.width,canvas.height); ctx.clearRect(0,0,canvas.width,canvas.height);
ctx.restore(); ctx.restore();
for (let i = 0; i < 1000; i += 4) {
imgData.data[i+0] = 255; ctx2.putImageData(imgData, 0, 0);
imgData.data[i+1] = 0;
imgData.data[i+2] = 0;
imgData.data[i+3] = 255;
}
ctx2.putImageData(imgData, 10, 50);
ctx.drawImage(canvasHidden, 0, 0) ctx.drawImage(canvasHidden, 0, 0)
ctx.imageSmoothingEnabled = false
} }
function drawPixel(x, y, color) { function drawPixel(x, y) {
let pixelNumber = y * canvas.width + x // THIS IS NOT CORRECT. MUST BE FIXED let pixelNumber;
for (let i = 0; i < 4; i ++) if (y > 0)
imgData.data[pixelNumber+i] = color[i] 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;
}
redraw(); redraw();
} }
@ -50,12 +68,13 @@
var lastX=canvas.width/2, lastY=canvas.height/2; var lastX=canvas.width/2, lastY=canvas.height/2;
var dragStart,dragged; var dragStart,dragged;
canvas.addEventListener('mousedown',function(evt){ canvas.addEventListener('mousedown',function(evt){
document.body.style.mozUserSelect = document.body.style.webkitUserSelect = document.body.style.userSelect = 'none'; if (evt.button == 1 || 1 == evt.button&2){
lastX = evt.offsetX || (evt.pageX - canvas.offsetLeft); document.body.style.mozUserSelect = document.body.style.webkitUserSelect = document.body.style.userSelect = 'none';
lastY = evt.offsetY || (evt.pageY - canvas.offsetTop); lastX = evt.offsetX || (evt.pageX - canvas.offsetLeft);
dragStart = ctx.transformedPoint(lastX,lastY); lastY = evt.offsetY || (evt.pageY - canvas.offsetTop);
dragged = false; dragStart = ctx.transformedPoint(lastX,lastY);
dragged = false;
}
},false); },false);
canvas.addEventListener('mousemove',function(evt){ canvas.addEventListener('mousemove',function(evt){
lastX = evt.offsetX || (evt.pageX - canvas.offsetLeft); lastX = evt.offsetX || (evt.pageX - canvas.offsetLeft);
@ -68,15 +87,46 @@
} }
},false); },false);
canvas.addEventListener('mouseup',function(evt){ canvas.addEventListener('mouseup',function(evt){
dragStart = null; if (evt.button == 1 || 1 == evt.button&2){
dragStart = null;
if (!dragged) drawPixel( if (dragged) {
Math.round(ctx.transformedPoint(lastX,lastY).x),
Math.round(ctx.transformedPoint(lastX,lastY).y) let point = ctx.transformedPoint(
) evt.clientX - canvas.offsetLeft,
// if (!dragged) zoom(evt.shiftKey ? -1 : 1 ); evt.clientY - canvas.offsetTop
},false); );
} 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(`${rgbToHex(color.r, color.g, color.b)}`)
changeColor(rgbToHex(
color.r, color.g, color.b
));
}
} else if (evt.button == 0) {
for (let l = 0; l < 4; l ++)
drawPixel(
Math.floor(ctx.transformedPoint(lastX,lastY).x) * 4,
Math.floor(ctx.transformedPoint(lastX,lastY).y) * 4
);
}
},false);
var scaleFactor = 1.1; var scaleFactor = 1.1;
var zoom = function(clicks){ var zoom = function(clicks){
var pt = ctx.transformedPoint(lastX,lastY); var pt = ctx.transformedPoint(lastX,lastY);
@ -96,60 +146,91 @@
canvas.addEventListener('mousewheel',handleScroll,false); canvas.addEventListener('mousewheel',handleScroll,false);
}; };
function trackTransforms(ctx){ function changeColor() {
var svg = document.createElementNS("http://www.w3.org/2000/svg",'svg');
var xform = svg.createSVGMatrix();
ctx.getTransform = function(){ return xform; };
var savedTransforms = [];
var save = ctx.save;
ctx.save = function(){
savedTransforms.push(xform.translate(0,0));
return save.call(ctx);
};
var restore = ctx.restore;
ctx.restore = function(){
xform = savedTransforms.pop();
return restore.call(ctx);
};
var scale = ctx.scale;
ctx.scale = function(sx,sy){ }
xform = xform.scaleNonUniform(sx,sy); function changeColor(color) {
return scale.call(ctx,sx,sy); if (color == undefined) currentColor = colorInput.value;
}; else currentColor = color
var rotate = ctx.rotate; }
ctx.rotate = function(radians){
xform = xform.rotate(radians*180/Math.PI);
return rotate.call(ctx,radians); //Code from https://stackoverflow.com/questions/5623838/rgb-to-hex-and-hex-to-rgb#5624139
}; function hexToRgb(hex) {
var translate = ctx.translate; // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
ctx.translate = function(dx,dy){ var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
xform = xform.translate(dx,dy); hex = hex.replace(shorthandRegex, function(m, r, g, b) {
return translate.call(ctx,dx,dy); return r + r + g + g + b + b;
}; });
var transform = ctx.transform;
ctx.transform = function(a,b,c,d,e,f){ var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
var m2 = svg.createSVGMatrix(); return result ? {
m2.a=a; m2.b=b; m2.c=c; m2.d=d; m2.e=e; m2.f=f; r: parseInt(result[1], 16),
xform = xform.multiply(m2); g: parseInt(result[2], 16),
return transform.call(ctx,a,b,c,d,e,f); b: parseInt(result[3], 16)
}; } : null;
var setTransform = ctx.setTransform; }
ctx.setTransform = function(a,b,c,d,e,f){
xform.a = a; const rgbToHex = (r, g, b) => '#' + [r, g, b].map(x => {
xform.b = b; const hex = x.toString(16)
xform.c = c; return hex.length === 1 ? '0' + hex : hex
xform.d = d; }).join('')
xform.e = e;
xform.f = f; function trackTransforms(ctx){
return setTransform.call(ctx,a,b,c,d,e,f); var svg = document.createElementNS("http://www.w3.org/2000/svg",'svg');
}; var xform = svg.createSVGMatrix();
var pt = svg.createSVGPoint(); ctx.getTransform = function(){ return xform; };
ctx.transformedPoint = function(x,y){
pt.x=x; pt.y=y; var savedTransforms = [];
return pt.matrixTransform(xform.inverse()); var save = ctx.save;
} ctx.save = function(){
savedTransforms.push(xform.translate(0,0));
return save.call(ctx);
};
var restore = ctx.restore;
ctx.restore = function(){
xform = savedTransforms.pop();
return restore.call(ctx);
};
var scale = ctx.scale;
ctx.scale = function(sx,sy){
xform = xform.scaleNonUniform(sx,sy);
return scale.call(ctx,sx,sy);
};
var rotate = ctx.rotate;
ctx.rotate = function(radians){
xform = xform.rotate(radians*180/Math.PI);
return rotate.call(ctx,radians);
};
var translate = ctx.translate;
ctx.translate = function(dx,dy){
xform = xform.translate(dx,dy);
return translate.call(ctx,dx,dy);
};
var transform = ctx.transform;
ctx.transform = function(a,b,c,d,e,f){
var m2 = svg.createSVGMatrix();
m2.a=a; m2.b=b; m2.c=c; m2.d=d; m2.e=e; m2.f=f;
xform = xform.multiply(m2);
return transform.call(ctx,a,b,c,d,e,f);
};
var setTransform = ctx.setTransform;
ctx.setTransform = function(a,b,c,d,e,f){
xform.a = a;
xform.b = b;
xform.c = c;
xform.d = d;
xform.e = e;
xform.f = f;
return setTransform.call(ctx,a,b,c,d,e,f);
};
var pt = svg.createSVGPoint();
ctx.transformedPoint = function(x,y){
pt.x=x; pt.y=y;
return pt.matrixTransform(xform.inverse());
}
} }
</script> </script>
</body> </body>