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나는 지금 당장 노드로 할 수있는 것처럼 내 라인 (근육)과 새 라인을 클릭하여 내 프로그램에서 강조 할 수 있기를 원합니다. 나는 context.isPointInPath()를 사용하고 싶지만, 라인이 단지 1 픽셀 너비라는 사실이 너무 제한적일 것이라고 생각합니다. 이제 직사각형을 선으로 변경하는 방법을 살펴 보겠습니다. 왜냐하면 mouseclick이 사각형의 높이와 너비 내에 있는지를 볼 수 있기 때문입니다. 하지만, 지금 당장 뇌졸중과 같이 직사각형을 두 노드에 연결하는 방법을 찾는 데 어려움을 겪고 있습니다. 지금까지 내 프로그램 :캔버스에서 선이나 직사각형을 선택하려고 시도했습니다.
/*jshint esversion: 6 */
//draw everything on canvas
//TODO: Change use of canvas to a container and moving elements around to avoid the buffer of frame drawing
//Node class
class Node {
constructor(x, y, r, color, highlight, highlightColor) {
this.x = x;
this.y = y;
this.r = r || 20;
this.color = color || "#ff0";
this.highlight = highlight || false;
this.highlightColor = highlightColor || "#0000FF";
}
}
//Muscle class
class Muscle {
constructor(node1, node2, width, color) {
this.node1 = node1;
this.node2 = node2;
this.width = width || 5;
this.color = color || "#f00";
//Properties of the nodes this muscle attaches to
Object.defineProperties(this, {
node1x: {
"get":() => this.node1.x,
"set": x => {
this.node1.x = x;
}
},
node1y: {
"get":() => this.node1.y,
"set": y => {
this.node1.y = y;
}
},
node2x: {
"get":() => this.node2.x,
"set": x => {
this.node2.x = x;
}
},
node2y: {
"get":() => this.node2.y,
"set": y => {
this.node2.x = y;
}
}
});
}
}
function setParentForNodes() {
this.nodes.forEach(node => {
node.parentCreature = this;
});
}
class Creature {
constructor(nodes, muscles, nodeColors) {
this.nodes = nodes;
this.muscles = muscles;
this.nodeColors = nodeColors || "#ff0";
setParentForNodes.call(this);
Object.defineProperties(this, {
creatureNumber: {
"get":() => creatures.indexOf(this),
}
});
}
addNewNode(newNode) {
newNode.parentCreature = this;
this.nodes.push(newNode);
}
addNewNodes(newNodes) {
newNodes.forEach(function(node) {
node.parentCreature = this;
}, this);
this.nodes = this.nodes.concat(newNodes);
}
}
var nodes = [
new Node(100, 100),
new Node(200, 200)
];
var muscles = [
new Muscle(nodes[0], nodes[1])
];
var creatures = [
new Creature(nodes, muscles)
];
var addNodePressed = false;
var attachMusclePressed = false;
var addLimbPressed = false;
function draw(container, ctx, nodes, creatureMuscles) {
//draw in the container
ctx.fillStyle = "#000000";
ctx.fillRect(container.y, container.x, container.width, container.height);
// for loop to draw all objects of nodes
for (let i = 0; i < creatures.length; i++) {
var creatureNodes = creatures[i].nodes;
for (let i = 0; i < creatureNodes.length; i++) {
ctx.beginPath();
ctx.arc(creatureNodes[i].x, creatureNodes[i].y, creatureNodes[i].r, 0, 2 * Math.PI);
ctx.fillStyle = creatureNodes[i].color;
ctx.closePath();
ctx.fill();
//check if node needs to be highlighted
if (creatureNodes[i].highlight == true) {
ctx.beginPath();
ctx.arc(creatureNodes[i].x, creatureNodes[i].y, creatureNodes[i].r, 0, 2 * Math.PI);
ctx.strokeStyle = creatureNodes[i].highlightColor;
ctx.lineWidth = 5; // for now
ctx.closePath();
ctx.stroke();
}
}
creatureMuscles = creatures[i].muscles;
//loop and draw every muscle
for (let i = 0; i < creatureMuscles.length; i++) {
ctx.beginPath();
ctx.moveTo(creatureMuscles[i].node1x, creatureMuscles[i].node1y);
ctx.lineTo(creatureMuscles[i].node2x, creatureMuscles[i].node2y);
ctx.strokeStyle = creatureMuscles[i].color;
ctx.lineWidth = creatureMuscles[i].width;
ctx.closePath();
ctx.stroke();
}
}
}
//Handle moving a node with mousedrag
function handleMouseDrag(canvas, creatureNodes) {
var isDrag = false;
var dragNode;
var offset = {
x: 0,
y: 0,
x0: 0,
y0: 0
};
canvas.addEventListener("mousedown", function(e) {
//mousedown then save the position in var x and y
var x = e.offsetX,
y = e.offsetY;
//loop through all the nodes to find the first node that is within radius of the mouse click
for (let i = 0; i < creatures.length; i++) {
var creatureNodes = creatures[i].nodes;
for (let i = 0; i < creatureNodes.length; i++) {
if (Math.pow(x - creatureNodes[i].x, 2) + Math.pow(y - creatureNodes[i].y, 2) < Math.pow(creatureNodes[i].r, 2)) {
isDrag = true;
dragNode = creatureNodes[i];
//offset.x&y = where the node is currently
//offset x0&y0 = where the user clicked
offset = {
x: dragNode.x,
y: dragNode.y,
x0: x,
y0: y
};
return;
}
}
}
});
// when mouse moves and isDrag is true, move the node's position
canvas.addEventListener("mousemove", function(e) {
/*when the user moves the mouse, take the difference of where his mouse is right now and where the user clicked.
Then, add that to where the node is right now to find the correct placement of the node without centering on your mouse
*/
if (isDrag) {
dragNode.x = e.offsetX - offset.x0 + offset.x; // where the mouse is right now - where the user mousedown + where the node is right now
dragNode.y = e.offsetY - offset.y0 + offset.y;
}
});
canvas.addEventListener("mouseup", function(e) {
isDrag = false;
});
canvas.addEventListener("mouseleave", function(e) {
isDrag = false;
});
}
//Handle highlighting and button functionality
function handleMouseClick(canvas, nodes, muscles) {
var highlighted;
var highlightedNode;
canvas.addEventListener("mousedown", function(e) {
var x = e.offsetX,
y = e.offsetY;
var loopbreak = false;
for (let i = 0; i < creatures.length; i++) {
var creatureNodes = creatures[i].nodes;
for (let i = 0; i < creatureNodes.length; i++) {
// check if click is within radius of a node, if it is, highlight and set highlight boolean to true.
if (Math.pow(x - creatureNodes[i].x, 2) + Math.pow(y - creatureNodes[i].y, 2) < Math.pow(creatureNodes[i].r, 2)) {
var clickedNode = creatureNodes[i];
if (addNodePressed) {
console.log("Not valid. Cannot add a node on top of another node.");
loopbreak = true;
break;
} else if (addLimbPressed) {
console.log("Not valid. Cannot add a limb on top of another node.");
loopbreak = true;
break;
} else if (attachMusclePressed) {
if (highlightedNode == clickedNode) {
console.log("Not valid. Cannot attach muscle to the same node.");
loopbreak = true;
break;
} else {
var newMuscle;
if (highlightedNode.parentCreature.creatureNumber == clickedNode.parentCreature.creatureNumber) {
newMuscle = new Muscle(highlightedNode, clickedNode);
highlightedNode.parentCreature.muscles.push(newMuscle);
attachMuscle();
highlightedNode.highlight = false;
highlighted = false;
devTools(true, false, false, false);
} else {
var newNodes = [];
var newMuscles = [];
if (highlightedNode.parentCreature.creatureNumber > clickedNode.parentCreature.creatureNumber) {
highlightedNode.parentCreature.nodes.forEach(function(node) {
newNodes.push(node);
});
highlightedNode.parentCreature.muscles.forEach(function(muscle) {
newMuscles.push(muscle);
});
newMuscle = new Muscle(highlightedNode, clickedNode);
clickedNode.parentCreature.muscles.push(newMuscle);
clickedNode.parentCreature.muscles = clickedNode.parentCreature.muscles.concat(newMuscles);
creatures.splice(creatures.indexOf(highlightedNode.parentCreature), 1);
clickedNode.parentCreature.addNewNodes(newNodes);
} else {
clickedNode.parentCreature.nodes.forEach(function(node) {
newNodes.push(node);
console.log("Clicked node is bigger.");
});
clickedNode.parentCreature.muscles.forEach(function(muscle) {
newMuscles.push(muscle);
});
newMuscle = new Muscle(highlightedNode, clickedNode);
highlightedNode.parentCreature.muscles.push(newMuscle);
highlightedNode.parentCreature.muscles = highlightedNode.parentCreature.muscles.concat(newMuscles);
creatures.splice(creatures.indexOf(clickedNode.parentCreature), 1);
highlightedNode.parentCreature.addNewNodes(newNodes);
}
highlightedNode.highlight = false;
attachMuscle();
devTools(true, false, false, false);
}
}
}
//no button pressed - highlight/unhighlight node
else {
if (highlighted || creatureNodes[i].highlight) {
if (highlightedNode != creatureNodes[i]) {
highlightedNode.highlight = false;
highlightedNode = creatureNodes[i];
highlightedNode.highlight = true;
devTools(false, true, true, true);
} else {
highlightedNode = creatureNodes[i];
highlightedNode.highlight = false;
highlighted = false;
highlightedNode = undefined;
devTools(true, false, false, false);
}
} else {
highlightedNode = creatureNodes[i];
highlightedNode.highlight = true;
highlighted = true;
devTools(false, true, true, true);
}
loopbreak = true;
break;
}
}
}
}
// if click was not in radius of any nodes then check for add limb or create node button press.
if (!loopbreak) {
loopbreak = false;
var newNode;
if (addNodePressed) {
newNode = new Node(x, y);
let newNodes = [];
let newMuscles = [];
newNodes.push(newNode);
var newCreature = new Creature(newNodes, newMuscles);
creatures.push(newCreature);
addNode();
addNodePressed = false;
devTools(true, false, false, false);
} else if (addLimbPressed) {
newNode = new Node(x, y);
let newMuscle = new Muscle(newNode, highlightedNode);
highlightedNode.parentCreature.addNewNode(newNode);
highlightedNode.parentCreature.muscles.push(newMuscle);
addLimb();
addLimbPressed = false;
highlightedNode.highlight = false;
highlighted = false;
highlightedNode = undefined;
devTools(true, false, false, false);
}
}
});
}
//Handle Devtools
function devTools(addNode, removeNode, attachMuscle, addLimb) {
var creatureNumberHTML = document.getElementById("creatureNumber");
var selectedHTML = document.getElementById("selected");
var addNodeB = document.getElementById("addNode");
var removeNodeB = document.getElementById("removeNode");
var attachMuscleB = document.getElementById("attachMuscle");
var addLimbB = document.getElementById("addLimb");
addNodeB.disabled = (addNode) ? false : true;
removeNodeB.disabled = (removeNode) ? false : true;
attachMuscleB.disabled = (attachMuscle) ? false : true;
addLimbB.disabled = (addLimb) ? false : true;
for (let i = 0; i < creatures.length; i++) {
var creatureNumber = i;
var creatureNodes = creatures[i].nodes;
for (let i = 0; i < creatureNodes.length; i++) {
if (creatureNodes[i].highlight == true) {
selectedHTML.innerHTML = `Selected: ${i} node`;
creatureNumberHTML.innerHTML = `Creature number: ${creatureNumber}`;
return;
} else {
creatureNumberHTML.innerHTML = "Creature number: -";
selectedHTML.innerHTML = "Selected: None";
}
}
}
}
//Handle add node button
function addNode() {
var addNodeB = document.getElementById("addNode");
if (addNodePressed) {
addNodePressed = false;
addNodeB.style.background = "";
} else {
addNodePressed = true;
addNodeB.style.backgroundColor = "#808080";
//and unhighlight
}
}
//Handle remove node button
function removeNode() {
for (let i = 0; i < creatures.length; i++) {
var creatureNodes = creatures[i].nodes;
var creatureMuscles = creatures[i].muscles;
for (let i = 0; i < creatureNodes.length; i++) {
if (creatureNodes[i].highlight == true) {
let highlightedNode = creatureNodes[i];
for (let i = 0; i < creatureMuscles.length; i++) {
if (creatureMuscles[i].node1 == highlightedNode || creatureMuscles[i].node2 == highlightedNode) {
creatureMuscles.splice(i, 1);
i--;
}
}
creatureNodes.splice(i, 1);
}
}
}
devTools(true, false, false, false);
}
//Handle attach muscle button
function attachMuscle() {
var attachMuscleB = document.getElementById("attachMuscle");
if (attachMusclePressed) {
attachMusclePressed = false;
attachMuscleB.style.background = "";
} else {
attachMusclePressed = true;
attachMuscleB.style.backgroundColor = "#808080";
}
}
//Handle add limb button
function addLimb() {
var addLimbB = document.getElementById("addLimb");
if (addLimbPressed) {
addLimbPressed = false;
addLimbB.style.background = "";
} else {
addLimbPressed = true;
addLimbB.style.backgroundColor = "#808080";
}
}
//Main - Grabs document elements to draw a canvas on, init node and muscle arrays and then continuously updates frame to redraw
function main() {
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
var container = {
x: 0,
y: 0,
get width() {
return canvas.width;
},
get height() {
return canvas.height;
}
};
handleMouseDrag(canvas, nodes);
handleMouseClick(canvas, nodes, muscles);
// refresh and redraw with new properties in an updateframe infinite loop
function updateFrame() {
ctx.save();
draw(container, ctx, nodes, muscles);
ctx.restore();
requestAnimationFrame(updateFrame);
}
updateFrame();
}
main();
#canvas {
display: block;
}
#info {
display: inline-block;
text-overflow: clip;
overflow: hidden;
margin-right: 200px;
}
#commands {
display: inline-block;
text-align: center;
margin-left: 200px;
}
#devTools {
background-color: aqua;
width: 1500px;
}
section {
width: 200px;
height: 200px;
background-color: grey;
vertical-align: top;
}
<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="styles.css" />
</head>
<body>
<!--TODO: Adjust the size of the canvas to fit the window-->
<canvas id="canvas" width="1500" , height="600"></canvas>
<!--TODO: Create buttons for all devtools under the canvas-->
<!--TODO: Make a container for all devtools under the canvas, then add all the functionality to it after-->
<div id="devTools">
<section id="info">
<p>Info</p>
<p id="creatureNumber">Creature Number: -</p>
<p id="selected">Selected: </p>
</section>
<section id="commands">
<p>Commands</p>
<button type="button" id="addNode" onclick="addNode()">Add node</button>
<button type="button" id="removeNode" disabled=true onclick="removeNode()">Remove node</button>
<button type="button" id="attachMuscle" disabled=true onclick="attachMuscle()">Attach muscle</button>
<button type="button" id="addLimb" disabled=true onclick="addLimb()">Add Limb</button>
<div id="muscleLength">
<button type="button" id="increaseLengthB">↑</button>
<p>Muscle Length</p>
<button type="button" id="decreaseLengthB">↓</button>
</div>
</section>
</div>
<script src="scripts/script.js"></script>
</body>
</html>
상황 자체 (
ctx.moveTo
등)에 일반 경로를 사용해야합니다 그것을 위해,하지만 난 ' 여전히 현재 프로그램에 문제가 있어도 lineWidth를 조정 함에도 불구하고 라인의 중간에있는 1 픽셀 만 인식합니다. – Chennyjsfiddle로 다시 만들었습니다 : https://jsfiddle.net/pm796vL3/19/ 잘 작동하기 때문에 지금 내 프로그램이 설정되는 방식에 문제가있을 것입니다. – Chenny
Nevermind, 문제가 발견되었습니다. ctx.save() 및 ctx.restore()와 관련이 있습니다. – Chenny