Question

我试图在整个图像上画多条对角线（在它们之间留一个空格）我用这段代码绘制水平和垂直线：

for (int z = 1; z < partToCrop; z++) {
    Shape hLines = new Line2D.Float(0, cropInPartWidth*z, chunkWidth, cropInPartWidth*z);
    Shape vLines = new Line2D.Float(cropInPartHeight*z, 0, cropInPartHeight*z, chunkHeight);
    gr.draw(hLines); //gr is a BufferedImage
    gr.draw(vLines);
}

其中

int partToCrop = 5;
float cropInPartWidth = imgWidth / partToCrop; 
float cropInPartHeight = imgHeight / partToCrop;

并且运作良好。现在我需要绘制多条对角线（即4条对角线），整个图像的倾斜度为45°和-45°，希望你能帮助我。

感谢。

Answer 1

实际上这对我来说似乎更容易。

假设imgDim = imgHeight = imgWidth：

int spacing = 2;

for (int z = 1; z < imgDim; z = z + spacing) 
{
    Shape dLines = new Line2D.Float(0, z, z, 0); 

    gr.draw(dLines); 
}

Answer 2

Shape firstLine = new Line2D.Float(0, imgHeight, imgWidth, 0); // this line is from bottom left to top right
Shape secondLine = new Line2D.Float(0, 0, imgWidth, imgHeight); // this line is from top left to bot right

java - 在BufferedImage上绘制多条对角线

2 个答案: