Java:旋转图像 [英] Java: Rotating Images

问题描述

我需要能够单独旋转图像(在 Java 中).到目前为止我唯一发现的是 g2d.drawImage(image, affinetransform, ImageObserver ).不幸的是，我需要在特定点绘制图像，并且没有带有参数的方法 1. 单独旋转图像 2. 允许我设置 x 和 y.任何帮助表示赞赏

I need to be able to rotate images individually(in java). The only thing I have found so far is g2d.drawImage(image, affinetransform, ImageObserver ). Unfortunately, I need to draw the image at a specific point, and there is no method with an argument that 1.rotates the image separately and 2. allows me to set the x and y. any help is appreciated

推荐答案

这是您可以做到的.此代码假定存在一个名为图像"的缓冲图像(如您的评论所说)

This is how you can do it. This code assumes the existance of a buffered image called 'image' (like your comment says)

// The required drawing location
int drawLocationX = 300;
int drawLocationY = 300;

// Rotation information

double rotationRequired = Math.toRadians (45);
double locationX = image.getWidth() / 2;
double locationY = image.getHeight() / 2;
AffineTransform tx = AffineTransform.getRotateInstance(rotationRequired, locationX, locationY);
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_BILINEAR);

// Drawing the rotated image at the required drawing locations
g2d.drawImage(op.filter(image, null), drawLocationX, drawLocationY, null);

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