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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>天地传说</title>
</head>
<style>
html,
body {
width: 100%;
height: 100%;
margin: 0;
}
#main {
position: absolute;
top: 0;
right: 0;
left: 0;
bottom: 0;
margin: auto;
border: 2px dashed #ccc;
}
</style>
<body>
<canvas id="main" width="500" height="700"></canvas>
<script>
let comboKeys = [];
let lastComboTs = 0;
let isDebug = false;
const main = document.getElementById("main");
var ctx = main.getContext("2d");
ctx.cW = main.width;
ctx.cH = main.height;
const { cW, cH } = ctx;
const heroDic = { "x": 0, "y": 0, "hX": 15, "hY": -10, "rcW": 30, "rcH": 30, "h": 60, "w": 60, "color": "skyblue", "arr": ["000000000000000011110000000100001100001000000010001010001001010000000001010001110001010012221101010012222101010001111101010000122101010000011001"], "colors": ["ffffffff", "000000ff", "fb9f1eff"], "colorCount": 3 };
const armDic = { "id": 'A00001', "isInHand": true, "rcW": 3, "rcH": 3, "gumW": 3, "gumH": 20, "w": 5, "h": 50, "rotate": 0, "color": "green", "arr": ["000000000000000011110000000100001100001000000010001010001001010000000001010001110001010012221101010012222101010001111101010000122101010000011001"] };
const aroundArmArr = [];
// const arrowDic = {}
const bulletDic = { "w": 5, "h": 5, "v": 3, "needDisappear": true }
const enemyArr = [
{ "color": "red", "x": 200, "y": 110, "w": 10, "h": 10, "rcH": 5, "rcW": 5, "alive": true },
{ "color": "red", "x": 350, "y": 220, "w": 10, "h": 10, "rcH": 5, "rcW": 5, "alive": true },
{ "color": "red", "x": 200, "y": 130, "w": 10, "h": 10, "rcH": 5, "rcW": 5, "alive": true },
{ "color": "red", "x": 130, "y": 80, "w": 20, "h": 20, "rcH": 10, "rcW": 10, "alive": true },
]
const onceDic = {};
addEnemy()
addEnemy()
addEnemy()
addEnemy()
addEnemy()
function addEnemy() {
let r = Math.random() * 20 | 0 + 10;
let w = r;
let h = r;
let x = Math.random() * cW | 0;
let y = Math.random() * cH | 0;
enemyArr.push({ "color": "red", "x": x, "y": y, "w": w, "h": h, "rcH": h / 2, "rcW": w / 2, "alive": true })
}
function once(func, ...args) {
if (!onceDic[func.name]) {
onceDic[func.name] = true;
func(...args);
} else {
return;
}
}
heroDic.armArr = [armDic];
heroDic.isDashed = false;
heroDic.isHardDamage = false;
window.ctx = ctx;
const downKeyDic = {};
addRole(heroDic);
setInterval(() => {
let { cW, cH } = ctx;
for (const key in downKeyDic) {
if (downKeyDic.hasOwnProperty(key)) {
const state = downKeyDic[key];
if (state) {
let step = heroDic.isDashed ? 2 : 1;
if (checkIs2MoveKey()) {
step *= 0.707;
}
let rotateW = heroDic.isHardDamage ? 20 : 5;
switch (key) {
case 'w':
heroDic.y += step;
break;
case 'a':
heroDic.x -= step;
break;
case 's':
heroDic.y -= step;
break;
case 'd':
heroDic.x += step;
break;
case 'j':
armDic.rotate += rotateW;
break;
case 'k':
armDic.rotate -= rotateW;
break;
case 'l':
once(changeArm);
case ' ':
once(shoot, armDic, bulletDic);
break;
default:
}
}
}
}
// log(heroDic.x, heroDic.y)
addRole(heroDic);
showAroundArms(aroundArmArr);
const armArr = heroDic.armArr;
for (let i = 0; i < enemyArr.length; i++) {
const enemyDic = enemyArr[i];
if (!enemyDic.alive) continue;
const { x: eX, y: eY, w: eW, h: eH, rcH: eRcH, rcW: eRcW } = enemyDic;
let eX1 = eX - eRcW;
let eX2 = eX - eRcW + eW;
let eY1 = eY - eRcH;
let eY2 = eY - eRcH + eH;
onTrueDo(isDebug, ctx.fillRect, eX1, eY1, eW, eH);
log('armArr.length', armArr.length)
for (let j = 0; j < armArr.length; j++) {
const armDic = armArr[j];
const { x: aX, y: aY, w: aW, h: aH, rcH: aRcH, rcW: aRcW, rotate: aRotate } = armDic;
let needLog = false;
if (!armDic.isInHand) {
needLog = true;
}
const lR = Math.sqrt(aRcW ** 2 + aRcH ** 2);
const rR = Math.sqrt((aW - aRcW) ** 2 + (aH - aRcH) ** 2);
// 因为起始位置是垂直的，所以按-90来，然后因为y轴镜像，顺逆时针也逆向
let aX1 = Math.cos((-aRotate + 270) * Math.PI / 180) * lR + aX;
let aY1 = Math.sin((-aRotate + 270) * Math.PI / 180) * lR + aY;
let aX2 = Math.cos((-aRotate + 90) * Math.PI / 180) * rR + aX;
let aY2 = Math.sin((-aRotate + 90) * Math.PI / 180) * rR + aY;
onTrueDo(isDebug, ctx.fillRect, aX1, aY1, aX2 - aX1, aY2 - aY1);
onTrueDo(needLog, log, '2134123411111111111', aX1, aY1, aX2 - aX1, aY2 - aY1);
let isIn = false;
if (
judgeIntersect(aX1, aY1, aX2, aY2, eX1, eY2, eX2, eY2) // 上
|| judgeIntersect(aX1, aY1, aX2, aY2, eX1, eY1, eX1, eY2) // 左
|| judgeIntersect(aX1, aY1, aX2, aY2, eX1, eY1, eX2, eY1) // 下
|| judgeIntersect(aX1, aY1, aX2, aY2, eX2, eY1, eX2, eY2) // 右
|| (eX1 < aX1 && eX2 > aX1 && eY1 < aY1 && eY2 > aY1) // 包含了子弹
|| (eX1 < aX2 && eX2 > aX2 && eY1 < aY2 && eY2 > aY2)) // 包含了子弹
{
isIn = true;
enemyDic.alive = false;
break;
}
}
if (enemyDic.alive) {
// enemyDic.xV = enemyDic.xV || 0;
// enemyDic.yV = enemyDic.yV || 0;
// enemyDic.xV += ((Math.random() * 3 | 0) - 1) / 10;
// enemyDic.yV += ((Math.random() * 3 | 0) - 1) / 10;
// if (Math.random() > .5) {
// enemyDic.x += (Math.random() * 3 | 0) * enemyDic.xV
// enemyDic.y += (Math.random() * 3 | 0) * enemyDic.yV
// }
showSth(enemyDic);
}
}
}, 16.6)
let myHeroDashVar;
let myHeroDamageVar;
document.addEventListener('keydown', (ev) => {
// log(ev.key, 'down');
log(comboKeys);
const result = checkCombo(ev.key) || '';
if (result.indexOf('dash') > -1) {
heroDic.isDashed = true;
clearTimeout(myHeroDashVar);
myHeroDashVar = setTimeout(() => {
heroDic.isDashed = false;
}, 800)
} else if (result.indexOf('hard damage') > -1) {
heroDic.isHardDamage = true;
clearTimeout(myHeroDamageVar);
myHeroDamageVar = setTimeout(() => {
heroDic.isHardDamage = false;
}, 500)
}
log('checkCombo', result);
downKeyDic[ev.key] = true;
// switch (ev.key) {
// case 'w':
// case 'a':
// case 's':
// case 'd':
// downKeyDic[ev.key] = true;
// break;
// case 'j':
// case 'k':
// downKeyDic[ev.key] = true;
// break;
// default:
// }
log(downKeyDic)
})
document.addEventListener('keyup', (ev) => {
log(ev.key, 'up');
dealCombo(ev.key);
downKeyDic[ev.key] = false;
if (ev.key == ' ') {
onceDic['shoot'] = false;
}
if (ev.key == 'l') {
onceDic['changeArm'] = false;
}
// switch (ev.key) {
// case 'w':
// case 'a':
// case 's':
// case 'd':
// downKeyDic[ev.key] = false;
// break;
// case 'j':
// case 'k':
// downKeyDic[ev.key] = false;
// break;
// default:
// }
})
function checkIs2MoveKey() {
let keyDownCount = 0;
if (downKeyDic['w']) keyDownCount++;
if (downKeyDic['a']) keyDownCount++;
if (downKeyDic['s']) keyDownCount++;
if (downKeyDic['d']) keyDownCount++;
return keyDownCount > 1 ? true : false;
}
function checkCombo(key) {
dealCombo(key)
let comboKeyStr = comboKeys.join(',');
log('123', comboKeyStr, comboKeyStr.indexOf('d,d'));
comboKeys.pop();
if (comboKeyStr) {
if (comboKeyStr.indexOf('w,w') == comboKeyStr.length - 3) {
return 'up dash';
}
if (comboKeyStr.indexOf('a,a') == comboKeyStr.length - 3) {
return 'left dash';
}
if (comboKeyStr.indexOf('s,s') == comboKeyStr.length - 3) {
return 'down dash';
}
if (comboKeyStr.indexOf('d,d') == comboKeyStr.length - 3) {
return 'right dash';
}
if (comboKeyStr.indexOf('j,j') == comboKeyStr.length - 3) {
return 'hard damage';
}
if (comboKeyStr.indexOf('k,k') == comboKeyStr.length - 3) {
return 'hard damage';
}
}
}
function dealCombo(key) {
let nowTs = Date.now();
if (nowTs - lastComboTs > 100) {
comboKeys = [];
}
lastComboTs = nowTs;
comboKeys.push(key);
}
function showSth(sth) {
let { ctx } = window;
let { cW, cH } = ctx;
let { x, y, rcW, rcH, w, h, rotate, color } = sth;
rotate = rotate || 0;
rcW = rcW || w / 2;
rcH = rcH || h / 2;
// log('centerX, centerY', x, y, color)
ctx.fillStyle = color;
ctx.translate((x - rcW) | 0, (cH - (y - rcH)) | 0)
ctx.rotate(rotate * Math.PI / 180);
ctx.fillRect(rcW, rcH, w, -h);
ctx.rotate(-rotate * Math.PI / 180);
ctx.translate(-(x - rcW) | 0, -(cH - (y - rcH)) | 0)
}
function addRole(heroDic) {
let { ctx } = window;
let { cW, cH } = ctx;
let { x, y, w, h } = heroDic;
ctx.clearRect(0, 0, cW, cH);
showSth(heroDic);
const armArr = heroDic.armArr || [];
for (let i = 0; i < armArr.length; i++) {
const armDic = armArr[i];
showArm(heroDic, armDic);
}
}
function showAroundArms(armArr) {
for (let i = 0; i < armArr.length; i++) {
const armDic = armArr[i];
showSth(armDic);
}
}
function showArm(heroDic, armDic) {
let { ctx } = window;
let { cW, cH } = ctx;
let { x, y, hX, hY, w, h } = heroDic;
let { x: armX, y: armY, w: armW, h: armH } = armDic;
if (armDic.isInHand) {
armDic.x = heroDic.x + heroDic.hX;
armDic.y = heroDic.y + heroDic.hY;
}
if (armDic.xV) armDic.x += armDic.xV;
if (armDic.yV) armDic.y += armDic.yV;
if (armDic.needDisappear) {
if (armDic.x < 0 || armDic.y < 0 || armDic.x > cW || armDic.y > cH) { }
if (armDic.options && armDic.options.bouncy) {
if (armDic.x < 0 && armDic.xV < 0) armDic.xV = -armDic.xV;
if (armDic.x + armDic.w > cW && armDic.xV > 0) armDic.xV = -armDic.xV;
if (armDic.y < 0 && armDic.yV < 0) armDic.yV = -armDic.yV;
if (armDic.y + armDic.h > cH && armDic.yV > 0) armDic.yV = -armDic.yV;
}
}
showSth(armDic);
}
function judgeIntersect(x1, y1, x2, y2, x3, y3, x4, y4) {
//快速排斥：
//两个线段为对角线组成的矩形，如果这两个矩形没有重叠的部分，那么两条线段是不可能出现重叠的
//这里的确如此，这一步是判定两矩形是否相交
//1.线段ab的低点低于cd的最高点（可能重合）
//2.cd的最左端小于ab的最右端（可能重合）
//3.cd的最低点低于ab的最高点（加上条件1，两线段在竖直方向上重合）
//4.ab的最左端小于cd的最右端（加上条件2，两直线在水平方向上重合）
//综上4个条件，两条线段组成的矩形是重合的
//特别要注意一个矩形含于另一个矩形之内的情况
if (!(Math.min(x1, x2) <= Math.max(x3, x4) && Math.min(y3, y4) <= Math.max(y1, y2) && Math.min(x3, x4) <= Math.max(x1, x2) && Math.min(y1, y2) <= Math.max(y3, y4)))
return false;
//跨立实验：
//如果两条线段相交，那么必须跨立，就是以一条线段为标准，另一条线段的两端点一定在这条线段的两段
//也就是说a b两点在线段cd的两端，c d两点在线段ab的两端
var u, v, w, z
u = (x3 - x1) * (y2 - y1) - (x2 - x1) * (y3 - y1);
v = (x4 - x1) * (y2 - y1) - (x2 - x1) * (y4 - y1);
w = (x1 - x3) * (y4 - y3) - (x4 - x3) * (y1 - y3);
z = (x2 - x3) * (y4 - y3) - (x4 - x3) * (y2 - y3);
return (u * v <= 0.00000001 && w * z <= 0.00000001);
}
function shoot(armDic, bulletDic) {
let bDic = JSON.parse(JSON.stringify(bulletDic));
bDic.xV = Math.cos((-armDic.rotate + 90) * Math.PI / 180) * bDic.v;
bDic.yV = Math.sin((-armDic.rotate + 90) * Math.PI / 180) * bDic.v;
const rR = Math.sqrt((armDic.h - armDic.rcW) ** 2 + (armDic.w - armDic.rcH) ** 2);
bDic.x = armDic.x + Math.cos((-armDic.rotate + 90) * Math.PI / 180) * rR;
bDic.y = armDic.y + Math.sin((-armDic.rotate + 90) * Math.PI / 180) * rR;
bDic.rcW = bDic.w / 2;
bDic.rcH = bDic.h / 2;
bDic.rotate = 0;
bDic.options = { bouncy: true }; // 自带是否弹跳
heroDic.armArr.push(bDic);
log('shoot', heroDic.armArr.length)
}
function dropArm(heroDic, needDropArmDic) {
let { armArr } = heroDic;
let { id: needDropArmId } = needDropArmDic;
for (let i = 0; i < armArr.length; i++) {
const armDic = armArr[i];
if (needDropArmId === armDic.id) {
armArr.splice(i, 1);
console.log('armArr', armArr, heroDic.armArr)
aroundArmArr.push(needDropArmDic);
console.log('is droped')
return true;
}
}
return false;
}
function catchArm(heroDic) {
console.log(aroundArmArr.length);
let needCatchArmDic;
let minD = 20;
let catchedIdx;
for (let i = 0; i < aroundArmArr.length; i++) {
const armDic = aroundArmArr[i];
let xD = Math.abs(armDic.x - (heroDic.x + heroDic.hX));
let yD = Math.abs(armDic.y - (heroDic.y + heroDic.hY));
if (xD < minD && yD < minD) {
minD = Math.min(xD, yD);
catchedIdx = i;
needCatchArmDic = armDic;
console.log('is catched')
}
}
if (needCatchArmDic) {
aroundArmArr.splice(catchedIdx, 1);
heroDic.armArr.push(needCatchArmDic);
}
return;
}
function changeArm() {
if (!aroundArmArr.length) {
dropArm(heroDic, armDic);
} else {
catchArm(heroDic, armDic);
}
};
function log(...args) {
if (isDebug) {
log(args.join(' '));
}
}
function onTrueDo(state, ...args) {
if (state) log(...args);
}
</script>
</body>
</html>