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http://jsfiddle.net/xknbn/ http://jsfiddle.net/xknbn/embedded/result/（JS/Canvas）的碰撞/運動的的sidescroller
嘿，夥計們。我遇到的問題讓我的碰撞系統無故障運行。目前，如果我的速度太快，我會嵌入到對象中，並且我的衝突解決失敗。我相當確定問題的發生是因爲我如何設置速度，但我不知道如何才能解決問題。任何幫助將不勝感激。
friction = 0.9,
gravity = 0.3;
function keycheck() {
if (keys[32]) {
if (!player.jumping) {
player.jumping = true;
player.vely = -player.speed;
}
}
if (keys[68]) {
if (player.velx < player.speed) {
player.velx++;
}
}
if (keys[65]) {
if (player.velx > -player.speed) {
player.velx--;
}
}
}
ctx.startx = player.x;
ctx.starty = player.y;
function playerupdate() {
player.Intersects = function(object) {
return player.x < object.x + object.width + 1 &&
player.x + player.width + 1 > object.x &&
player.y < object.y + object.height + 1 &&
player.y + player.height + 1 > object.y;
}
solidcount = 0;
for (i = 0; i < tgen.length; i++) {
for (ii = 0; ii < tgen[i].length; ii++) {
if (player.Intersects(tgen[i][ii]) && tgen[i][ii].solid) {
var pright = player.x + player.width,
pleft = player.x,
ptop = player.y,
pbottom = player.y + player.height,
oright = tgen[i][ii].x + tgen[i][ii].width,
oleft = tgen[i][ii].x,
otop = tgen[i][ii].y,
obottom = tgen[i][ii].y + tgen[i][ii].height;
//if player is to the right of his previous position, and his right side has collided with objects left
if (player.x >= ctx.startx && pright > oleft - 1) {
player.x--;
}
//if player is to the left of his previous position, and his left side has collided with objects right
if (player.x <= ctx.startx && pleft < oright + 1) {
player.x++;
}
//if player is above his previous position, and his top side has collided with objects bottom
if (player.y <= ctx.starty && ptop < obottom + 1) {
player.y++;
}
//if player is below his previous position, and his bottom side has collided with objects top
if (player.y >= ctx.starty && pbottom > otop - 1) {
player.y--;
player.vely = 0;
player.jumping = false;
}
solidcount++;
}
}
if (i == tgen.length - 1 && solidcount == 0) {
player.jumping = true;
}
}
ctx.diffx = player.x - ctx.startx;
ctx.diffy = player.y - ctx.starty;
if (player.x <= bgimg.width - width/2 && player.x >= width/2) {
ctx.translate(-ctx.diffx,0);
}
if (player.y <= bgimg.height - 360 - player.height) {
ctx.translate(0,-ctx.diffy);
}
ctx.startx = player.x;
ctx.starty = player.y;
ctx.clearRect(player.x-width/2,player.y-height/2,width,height);
ctx.fillStyle = 'red';
ctx.fillRect(player.x,player.y,player.width,player.height);
keycheck();
player.velx *= friction;
if (player.jumping) {player.vely += gravity;}
player.x += player.velx;
player.x = Math.round(player.x);
player.y += player.vely;
player.y = Math.round(player.y);
if (player.y >= bgimg.height - player.height - 1) {
player.y = bgimg.height - player.height - 1;
player.vely = 0;
player.jumping = false;
}
if (player.x > bgimg.width - player.width) {
player.x = bgimg.width - player.width;
player.velx = 0;
};
if (player.x < 0) {
player.x = 0;
player.velx = 0;
}
if (!keys[65] && !keys[68] && (player.velx < 0.2 && player.velx > -0.2)) {player.velx = 0};
console.log(player.x,player.y)
requestAnimationFrame(playerupdate);
}