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javascript - 碰撞检测问题;对某些条件的奇怪 react

转载 作者:行者123 更新时间:2023-11-28 10:54:24 26 4
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如果有人认为此问题过于具体,请随时将其删除。

我在碰撞检测方面遇到了麻烦,我已经了解了一些基本的碰撞检测技术,然后尝试对其进行调整以判断与哪一侧发生碰撞,但是当 Angular 碰撞或 Angular 色具有垂直和垂直方向时,检测似乎会失败碰撞时的水平速度。

这是我的碰撞检测函数:

this.checkCollision = function() {
var isGround = false;
var i;

/*Combines Platforms and Chars so Character Collide with Eachother*/
var x = platforms[level];
var y = chars[level];
var p = x.concat(y);

/* For Readability */
var top = this.y;
var bottom = this.y + this.h;
var left = this.x;
var right = this.x + this.w;

for (i = 0; i < p.length; i++) {
/* For Readability */
var pTop = p[i].y;
var pBottom = p[i].y + p[i].h;
var pLeft = p[i].x;
var pRight = p[i].x + p[i].w;

if (p[i] !== this) {
if (this.inverted) {

/*Vertical-Top*/
if ((bottom === pTop) && (right > pLeft && left < pRight)) {

this.vy = -gravity;


/*Vertical-Near-Top*/
} else if ((bottom + this.vy >= pTop && bottom <= pTop) && (right > pLeft && left < pRight)) {

this.vy = pTop - bottom;

/*Vertical-Bottom*/
} else if ((top === pBottom) && (right > pLeft && left < pRight) && (this.vy <= 0)) {

isGround = true;
this.onGround = true;

/*Vertical-Near-Bottom*/
} else if ((top + this.vy <= pBottom && top >= pTop) && (right > pLeft && left < pRight)) {

this.vy = pBottom - top + gravity;

}
} else {

/*Vertical-Top*/
if ((bottom === pTop) && (right > pLeft && left < pRight)) {

if (p[i].bouncy) {
this.vy = -(this.jumpVelocity * 1.2);
} else if (p[i] instanceof Char && !p[i].inverted) {
this.vx = this.current ? this.vx : p[i].vx;
if (p[i].onGround) {
isGround = true;
this.onGround = true;
} else {
this.vy = p[i].vy;
}
} else {
this.vx = this.current ? this.vx : 0;
isGround = true;
this.onGround = true;
}

/*Vertical-Near-Top*/
} else if ((bottom + this.vy >= pTop && bottom <= pTop) && (right > pLeft && left < pRight)) {

this.vy = pTop - bottom - gravity;

/*Vertical-Bottom*/
} else if ((top === pBottom) && (right > pLeft && left < pRight)) {

this.vy = gravity;

/*Vertical-Near-Bottom*/
} else if ((top + this.vy <= pBottom && top >= pTop) && (right > pLeft && left < pRight)) {

this.vy = top - pBottom;

}
}
/*Horizontal-Left*/
if ((right === pLeft) && ((top < pTop && bottom > pTop) || (top < pBottom && bottom >= pBottom) || (top >= pTop && bottom <= pBottom)) && (this.vx > 0)) {

this.vx = 0;

/*Horizontal-Left-Near*/
} else if ((right + this.vx >= pLeft && right <= pRight) && ((top < pTop && bottom > pTop) || (top < pBottom && bottom >= pBottom) || (top >= pTop && bottom <= pBottom)) && (this.vx > 0)) {

this.vx = pLeft - right;

/*Horizontal-Right*/
} else if ((left === pRight) && ((top < pTop && bottom > pTop) || (top < pBottom && bottom >= pBottom) || (top >= pTop && bottom <= pBottom)) && (this.vx < 0)) {

this.vx = 0;

/*Horizontal-Right-Near*/
} else if ((left + this.vx <= pRight && left >= pLeft) && ((top < pTop && bottom > pTop) || (top < pBottom && bottom >= pBottom) || (top >= pTop && bottom <= pBottom)) && (this.vx < 0)) {

this.vx = pRight - left;

}
}
}
if (!isGround) {
this.onGround = false;
}
};

剩下的代码就是这里的JSFiddle(按T键进入包含所有字符的测试级别):http://jsfiddle.net/v5hhpt57/1/

此外,我建议使用全屏结果,因为 Canvas 似乎不太适合 JSFiddle 页面:http://tinyurl.com/twa-js (不是 JSFiddle,而是 Google 网站托管,因为 JSFiddle 存在困难)

对于特定问题,在测试关卡中,将红色从蓝色上方移开,将粉色向右移动一点,然后尝试将紫色弹到蓝色上方。

最后不要介意在地面上的漂浮和下沉,那是在碰撞处理端。

再说一次:如果有人认为这个问题太具体,请随时将其删除。

最佳答案

我也在用 Canvas 制作游戏。我还是个初学者,但已经为我的在线网络游戏打下了一些基础知识。我认为这里的碰撞几乎就像我的游戏鼠标一样。

Xerror = 2
Yerror = 3
monster_width = 20
monster_height = 20
mouseX = evt.clientX-Xerror //My mouse X position in canvas map
mouseY = evt.clientY-Yerror //My mouse Y position in canvas map

for monster in all_monsters //looping trough all monsters
if mouseX > monster.x_position[monster.id]-monster_width/2+Xerror*4 and mouseX<
monster.x_position[monster.id]+monster_width/2+Xerror*4 and mouseY>
monster.y_position[monster.id]-monster_height/2+Yerror*2 and mouseY<
monster.y_position[monster.id]+monster_height/2+Yerror*4
// then my mouse is over one of the monsters

这些 X 错误可能是因为 Canvas 的小边框,不知道,但如果没有这些,我会得到错误的输出。但我还从 2 中减去怪物的宽度/高度,以获得中心。 (我的怪物只是立方体)。

我自己的游戏位于gamegame.herokuapp.com,ID testeris,PWD testeris。如果您想联系我,请发送电子邮件至 magimantas@yahoo.com。我热衷于使用 canvas、Ruby on Rails、Backbone.js、coffeescript 制作在线游戏。与其他喜欢使用 Canvas 创建游戏的人交谈会很有趣:)

关于javascript - 碰撞检测问题;对某些条件的奇怪 react ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26950106/

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