[英]Rectangle and circle resolve collision
如果球觸及方塊的頂部和底部,如何改變球的dy? 現在,它只是具有擺動效果,並且在碰到頂部或底部時會陷入塊內。 這是我的Jsfiddle: https ://jsfiddle.net/6qh70wdo/
if (ball.x - ball.radius < block.x + block.w &&
ball.x + ball.radius > block.x &&
ball.y - ball.radius < block.y + block.h &&
ball.y + ball.radius > block.y) {
ball.dx = -ball.dx;
}
我將其分為兩部分。 首先檢測它是否被擊中,然后再擔心它在哪里被擊中。 我認為您可以執行以下操作:
var bool = ball.x - ball.radius < block.x + block.w &&
ball.x + ball.radius > block.x &&
ball.y - ball.radius < block.y + block.h &&
ball.y + ball.radius > block.y) {
ball.dx = -ball.dx;
if(bool) // if true, meaning a hit, find which direction.
if(ball.x - ball.radius < block.x + block.w || ball.x + ball.radius > block.x){
ball.dx = -ball.dx; //hit detected on left/right...change left/right direction
}else{
ball.dy = -ball.dy; //hit detected on top/bottom...change top/bottom direction
}
}
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