Question

我已经搜索了很多方法来做到这一点，我最终决定只通过从位图图像加载来编写文本。这是我第一次加载图像的单独区域并使用位图，所以我知道我的算法中有一些错误。（我敢打赌的一些主要的）但我做到了最好的方式我能想到如何。如果有人会告诉我我做错了什么，并指出我正确的方向来解决这个问题。从我可以告诉我将信息发送到渲染中它是正确的，我得到正确的字符和正确的x，y位置来翻译它，并且纹理加载也很好。我似乎无法弄清楚为什么我没有得到这封信的正确部分，没有任何东西出现。

这是我的代码。

public class StringText {

private ArrayList<TextChar> fontChar;
private final int CHAR_SIZE = 8;
private final int MARGINE = 1;
private Texture fontTexture;
private String lower;
private String upper;
private String symb;
private final int IMAGE_SIZE  = 256;


public StringText(){
    lower = "abcdefghijklmnopqrstuvwxyz";
    upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    symb = ".,?:*!+-() ";
    fontChar = new ArrayList<TextChar>();
    readInFont("font");
    populateCheck();
}

public void drawText(String ts, int x, int y, float red, float green, float blue){
    for(int a = 0; a < ts.length(); a++){
        for(int b = 0; b < fontChar.size(); b++)
        if(fontChar.get(b).getChar == ts.charAt(a))
            render(fontChar.get(b),a, x, y, red, green, blue);
    }
}

private void populateCheck(){
    int charX = 0;
    int charY = 0;
    for(int x = 0;  x < lower.length(); x++){
        TextChar t = new TextChar(lower.charAt(x), charX, -8);
        fontChar.add(t);
        charX += CHAR_SIZE;
    }
    charX = 0;
    for(int x = 0; x < upper.length(); x++){
        TextChar t = new TextChar (upper.charAt(x), charX, -16);
        fontChar.add(t);
        charX += CHAR_SIZE;
    }
    charX = 0;
    for(int x = 0; x < symb.length(); x++){
        TextChar t = new TextChar(symb.charAt(x), charX, -24);
        fontChar.add(t);
        charX += CHAR_SIZE;
    }
}

private void render(TextChar textChar, int current, int x, int y, float red, float green, float blue){
    int inc = current * (CHAR_SIZE + MARGINE);
    glLoadIdentity();
    glTranslatef(x + inc,y,0f);
    glColor3f(red, green, blue);
    glScalef(1.0f, -1.0f, 1.0f);
    fontTexture.bind();
    System.out.println("Letter Position: " + (x+inc) + ", " + y + " Character: " + textChar.getChar);


    float x0 = textChar.x/IMAGE_SIZE;
    float y0 = textChar.y/IMAGE_SIZE;
    float x1 = (textChar.x + CHAR_SIZE)/IMAGE_SIZE;
    float y1 = (textChar.y - CHAR_SIZE)/IMAGE_SIZE;

    glBegin(GL_QUADS);
        glTexCoord2f( x0, -y0); glVertex2f(0,0);
        glTexCoord2f(x1,-y0); glVertex2f(IMAGE_SIZE,0);
        glTexCoord2f(x1,-y1); glVertex2f(IMAGE_SIZE, IMAGE_SIZE);
        glTexCoord2f(x0,-y1); glVertex2f(0,IMAGE_SIZE);
    glEnd();
}

private void readInFont(String s){
    try {
        fontTexture = TextureLoader.getTexture("PNG", new FileInputStream(new File("res/font/"+ s +".png")));
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private class TextChar{
    int x,y;
    char getChar;
    public TextChar(char s, int xa, int ya){
        x = xa;
        y = ya;
        getChar = s;
    }
}

}

Answer 1

通过使用ASCII位图，我找到了比这更好的方法。

使用LWJGL显示文本

1 个答案: