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我的画布中间有一个图像,我想旋转它以面对鼠标在画布上的位置。JavaScript和HTML5 - 向鼠标旋转字符
我有我的鼠标位置的变量,我已经把我的图像放在一个矩阵,所以它目前完全旋转在给定值的中心,现在我只需要连接两个。
var characterRotation = 0;
function characterController(){
ctxMain.clearRect(0, 0, gameWidth, gameHeight);
var charWidth = 65;
var charHeight = 85;
var srcX = 0;
var srcY = 619;
var drawX = gameWidth/2 - charWidth/2;
var drawY = gameHeight/2 - charHeight/2;
ctxMain.setTransform(1, 0, 0, 1, drawX, drawY);
ctxMain.rotate(characterRotation * Math.PI/180);
characterRotation = mouseX*2/mouseY*2; // ?? this is what needs to roate my character
ctxMain.drawImage(imgSprite, srcX, srcY, charWidth, charHeight, -charWidth/2, -charHeight/2, charWidth, charHeight);
}