我在程序中定义了一个名为fighter的变量。我有一个if keyPressed函数,它根据键选择一个特定的图像。我遇到的问题是图像交换但重叠原始图像。我还尝试在战斗机的原始位置添加一个else语句,但仍然是相同的响应。
var fighter;
var stance;
var kick;
var jab;
var cross;
var mx; //Use to constrain fighter to center of circle
var my;
function preload(){
stance = loadImage("img/stance.svg");
kick = loadImage("img/kick.svg");
jab = loadImage("img/jab.svg");
cross = loadImage("img/cross.svg");
};
function setup(){
createCanvas(1280,720);
};
function draw(){
background(0, 246, 255);
fill("red");
ellipse(width/2,height/2,500,500);
mx = constrain(mouseX,width/2-250,width/2+250);
my = constrain(mouseY,height/2-250,height/2+250);
fighter = image(stance,mx,my);
if(keyIsPressed){
if((key == "a" || key == "A")){
fighter = "";
fighter = image(jab,mx,my);
}
else if ((key == "w" || key == "W")) {
fighter = image(cross,mx,my);
}
else if ((key == "s" || key == "S")) {
fighter = image(kick,mx,my);
}
};
};
答案 0 :(得分:1)
由于某种原因,您将fighter
设置为等于image()
函数返回的值。这没有多大意义。
相反,我认为您要将fighter
设置为等于其中一个图像,然后将fighter
传递给image()
函数。像这样:
fighter = stance;
if(keyIsPressed){
if((key == "a" || key == "A")){
fighter = jab;
}
else if ((key == "w" || key == "W")) {
fighter = cross
}
else if ((key == "s" || key == "S")) {
fighter = kick;
}
}
image(fighter, mx,my);