如何将 png 保存在矩形中？

Question

我在 Winforms 中构建了一个贪吃蛇游戏，我需要一些 png 文件作为食物。如何将 png 保存在矩形中？这是一些代码：

class Food
{
    #region Variables
    private int x, y, widht = 20, hight = 20;
    private SolidBrush brush;
    public Rectangle foodrectangle;

    int fieldsize_X = 47;// spawnrange
    int fieldsize_Y = 38;// spawnrange
    int squaresize = 20;

    #endregion

"worth"变量是一个随机数，所以我可以有随机颜色。

    #region Normal Food

    public void changecolor()
    {
        switch (Form1.worth)
        {
            case 1:
                brush = new SolidBrush(Color.Red); 
                break;

            case 2:
                brush = new SolidBrush(Color.Orange); 
                break;

            case 3:
                brush = new SolidBrush(Color.Yellow); 
                break;

            case 4:
                brush = new SolidBrush(Color.Blue); 
                break;

            case 5:
                brush = new SolidBrush(Color.White); 
                break;
            default: brush = new SolidBrush(Color.Red); break;
        }
    }



    public Food(Random randomfood)
    {
        changecolor();

        x = randomfood.Next(0, fieldsize_X) * squaresize; 
        y = randomfood.Next(0, fieldsize_Y) * squaresize;

        foodrectangle = new Rectangle(x, y, widht, hight);

    }//creat Food

我使用计时器，所以我需要在时间开始前生成食物。当您按下箭头键时，计时器开始计时。

    public void Foodlocation (Random randomfood)
    {
        changecolor();

        x = randomfood.Next(0, fieldsize_X) * squaresize;// 0 = spawnrange to the next food
        y = randomfood.Next(0, fieldsize_Y) * squaresize;

        foodrectangle.X = x; //X.Max = 47 * 20 = 940
        foodrectangle.Y = y; //Y.Max = 38 * 20 = 760

        foodrectangle = new Rectangle(x, y, widht, hight);//spawn first food

    }

    public void drawFood (Graphics paper)
    { 
        paper.FillRectangle(brush, foodrectangle);

    }
    #endregion
}

我想要一个依赖于 "worth" 变量的 png 而不是颜色。如果 "worth" = 1，那么正方形有 apple.png 或类似的东西。

Answer 1

这应该有效

public void drawFood (Graphics paper)
{ 
    // Load a png object from a file.
    Image sourceImage = Image.FromFile(@"C:\my.png");

    // Draw a portion of the source image.
    paper.DrawImage(sourceImage, foodrectangle.X, foodrectangle.Y, new Rectangle(0, 0, squaresize, squaresize), GraphicsUnit.Pixel);
}

如何将 png 保存在矩形中？

How can i save a png in a rectangle?

c#

png

image

rectangles

winforms