/**
* The purpose of this program is to make an image and turn it into a kaleidoscope
*
* @author (Danny Meijo)
* @version (07/27/2017)
*/
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.geom.Ellipse2D;
public class KaleidoscopeImage
{
private Picture canvas = null;
private Picture canvas2 = null;
private Picture pictureObj = null;
private Picture scaledPicture = null;
private Picture clippedPicture = null;
private Graphics g = null;
private Graphics g2 = null;
private Graphics gV2 = null;
private Graphics g2V2 = null;
private Graphics gV3 = null;
private Graphics g2V3 = null;
KaleidoscopeImage(Picture Canvas, Picture image, Picture Canvas2)
{
canvas = Canvas;
canvas2 = Canvas2;
pictureObj = image;
g = canvas.getGraphics();
g2 = (Graphics2D)g;
}
public Picture firstPanel()
{
g2.drawImage(pictureObj.getImage(), 0, canvas.getHeight() / 2, null);
Pixel bottomLeftPixel = null;
Pixel topRightPixel = null;
Color sourceColor1 = null;
for(int ty = 0, by = canvas.getHeight(); ty < canvas.getHeight() / 2; ty++, by--)
{
for(int lx = 0, rx = canvas.getWidth(); lx < canvas.getWidth() / 2; lx++, rx--)
{
bottomLeftPixel = canvas.getPixel(lx, by - 1);
sourceColor1 = bottomLeftPixel.getColor();
topRightPixel = canvas.getPixel(rx - 1, ty);
topRightPixel.setColor(sourceColor1);
}
}
Pixel sourcePixel = null;
Pixel targetPixel = null;
Color sourceColor2 = null;
Color targetColor = null;
for(int y = 0; y < canvas.getHeight() / 2; y++)
{
for(int lx = 0, rx = canvas.getWidth(); lx < canvas.getWidth() / 2; lx++, rx--)
{
sourcePixel = canvas.getPixel(rx - 1,y);
sourceColor2 = sourcePixel.getColor();
targetPixel = canvas2.getPixel(lx,y);
targetPixel.setColor(sourceColor2);
}
}
return canvas2;
}
public Picture secondPanel()
{
Pixel leftPixel = null;
Pixel rightPixel = null;
Color sourceColor = null;
for(int y = 0; y < canvas2.getHeight() / 2; y++)
{
for(int lx = 0, rx = canvas2.getWidth(); lx < canvas2.getWidth() / 2; lx++, rx--)
{
leftPixel = canvas2.getPixel(lx,y);
sourceColor = leftPixel.getColor();
rightPixel = canvas2.getPixel(rx - 1, y);
rightPixel.setColor(sourceColor);
}
}
return canvas2;
}
public Picture thirdPanel()
{
Pixel topPixel = null;
Pixel bottomPixel = null;
Color sourceColor = null;
for(int lx = 0, rx = canvas2.getWidth(); lx < canvas2.getWidth() / 2; lx++, rx--)
{
for(int ty = 0, by = canvas2.getHeight(); ty < canvas2.getHeight() / 2; ty++, by--)
{
topPixel = canvas2.getPixel(rx - 1, ty);
sourceColor = topPixel.getColor();
bottomPixel = canvas2.getPixel(rx - 1, by - 1);
bottomPixel.setColor(sourceColor);
}
}
return canvas2;
}
public Picture fourthPanel()
{
Pixel leftPixel = null;
Pixel rightPixel = null;
Color sourceColor = null;
for(int lx = 0, rx = canvas2.getWidth(); lx < canvas2.getWidth() / 2; lx++, rx--)
{
for(int ty = 0, by = canvas2.getHeight(); ty < canvas2.getHeight() / 2; ty++, by--)
{
leftPixel = canvas2.getPixel(rx - 1, by - 1);
sourceColor = leftPixel.getColor();
rightPixel = canvas2.getPixel(lx, by - 1);
rightPixel.setColor(sourceColor);
}
}
return canvas2;
}
public Picture scalePicture(double xFactor, double yFactor)
{
AffineTransform scaleTransform = new AffineTransform();
scaleTransform.scale(xFactor, yFactor);
scaledPicture = new Picture((int)(canvas2.getWidth() * xFactor), (int)(canvas2.getHeight() * yFactor));
gV2 = scaledPicture.getGraphics();
g2V2 = (Graphics2D)gV2;
g2V2.drawImage(canvas2.getImage(), scaleTransform, null);
return scaledPicture;
}
public Picture clipPicture(Color color)
{
Picture canvas3 = new Picture(canvas2.getWidth(), canvas2.getHeight());
Pixel sourcePixel = null;
Pixel targetPixel = null;
Color sourceColor = null;
Color targetColor = null;
for(int y = 0; y < canvas2.getHeight(); y++)
{
for(int x = 0; x < canvas.getWidth(); x++)
{
sourcePixel = canvas2.getPixel(x,y);
sourceColor = sourcePixel.getColor();
targetPixel = canvas3.getPixel(x,y);
targetPixel.setColor(sourceColor);
}
}
gV3 = canvas3.getGraphics();
g2V3 = (Graphics2D)gV3;
canvas3.setAllPixelsToAColor(color);
Ellipse2D.Double clip = new Ellipse2D.Double(0,0, canvas3.getHeight(), canvas3.getWidth());
g2V3.setClip(clip);
g2V3.drawImage(canvas2.getImage(), 0, 0, canvas3.getHeight(), canvas3.getWidth(), null);
return canvas3;
}
}
对不起，这是我的第一篇文章，我也是java的新手，因为我在夏天学习它。我不知道如何将它切割成我需要的部分，但我遇到的问题是在scalePicture方法中。我正在复制我在演示程序中看到的内容，将图像缩小到0.75x0.75。但是，在我的程序中，drawImage方法出错，因为demo程序没有错误。
如果你很好奇这是我正在复制的演示：
import java.awt.geom.AffineTransform;
import java.awt.Graphics;
import java.awt.Graphics2D;
class ScalingDemo
{
private Picture originalPicture = null;
private Picture newPicture = null;
private Graphics g = null;
private Graphics2D g2 = null;
ScalingDemo(Picture pic)
{
originalPicture = pic;
}
public Picture scalePicture(double xFactor, double yFactor)
{
AffineTransform scaleTransform = new AffineTransform();
scaleTransform.scale(xFactor, yFactor);
newPicture = new Picture((int)(originalPicture.getWidth()*xFactor), (int)(originalPicture.getHeight()*yFactor));
g = newPicture.getGraphics();
g2 = (Graphics2D)g;
g2.drawImage(originalPicture.getImage(), scaleTransform, null);
return newPicture;
}
}
答案 0 :(得分：0)
看起来错误在线：
g2V2.drawImage(canvas2.getImage(), scaleTransform, null); - java.awt.Graphics界面中没有这样的方法。
您应该使用另一个签名的方法：
drawImage(Image img, int x, int y, ImageObserver observer) - 请参阅here