Java 你如何在 lwjgl 中渲染 2D 文本？
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时间：2020-08-13 11:39:57 来源:igfitidea点击:
How do you render 2D text in lwjgl?
提问by Brian_Entei
Before you go off on me for "not searching", I've searched around a LOT and found a lot of answers, but none of them worked for me.
Before you go off on me for "not searching", I've searched around a LOT and found a lot of answers, but none of them worked for me.
Hi, I'm making a 3D java lwjgl game, and I'm trying to render some simple 2D text on my screen in the middle, but no matter what I try, I never see any text rendered onto my screen anywhere. Here's my Text2D.java class:
嗨，我正在制作一个 3D java lwjgl 游戏，我试图在我的屏幕中间呈现一些简单的 2D 文本，但无论我尝试什么，我都没有看到任何文本呈现在我的屏幕上的任何地方。这是我的 Text2D.java 类：
package com.gmail.br45entei.base.engine.rendering;
import java.awt.Font;
import java.awt.FontFormatException;
import java.io.IOException;
import org.newdawn.slick.Color;
import org.newdawn.slick.UnicodeFont;
import com.gmail.br45entei.base.engine.core.Vector2f;
import com.gmail.br45entei.base.game.Game;
import com.gmail.br45entei.base.game.MainComponent;
import com.gmail.br45entei.file.FileMgmt;
/**
* @author Brian_Entei
*
*/
public class Text3D {
private Camera camera;
private UnicodeFont font;
private Color color;
private Vector2f position;
private String text = "New string";
private int size = 12;
public int getSize() {
return this.size;
}
public void setSize(int size) {
this.size = size;
updateFont();
}
private void updateFont() {
try {
this.font = new UnicodeFont(Font.createFont(Font.TRUETYPE_FONT, FileMgmt.getFile(MainComponent.resourceFolder, "/fonts/BrianOwenReidBold.ttf", false)), size, false, false);
} catch (FontFormatException e) {
FileMgmt.LogException(e, "updateFont()", "Failed to create font from file!", false);
} catch (IOException e) {
FileMgmt.LogException(e, "Text3D()", "Failed to load file to create font!", false);
}
}
public Text3D(String text, Camera camera) {
this.camera = camera;
this.color = Color.black;
this.position = new Vector2f(0, 0);
this.text = text;
updateFont();
}
public void drawHudString() {
//org.lwjgl.opengl.GL11.glPushMatrix();// This gets called right before here.
org.lwjgl.opengl.GL11.glRotatef(camera.getForward().getX(), -1.0f, 0.0f, 0.0f);
org.lwjgl.opengl.GL11.glRotatef(camera.getForward().getY(), 0.0f, -1.0f, 0.0f);
org.lwjgl.opengl.GL11.glRotatef(camera.getForward().getZ(), 0.0f, 0.0f, -1.0f);
org.lwjgl.opengl.GL11.glTranslatef(-camera.getPos().getX(), -camera.getPos().getY(), -camera.getPos().getZ() + 20);
this.font.drawString(this.position.getX(), this.position.getY(), this.text, this.color);
//org.lwjgl.opengl.GL11.glPopMatrix();// This gets called right after here.
}
public void render() {
Game.print("Text render!");
org.lwjgl.opengl.GL11.glMatrixMode(org.lwjgl.opengl.GL11.GL_PROJECTION);
org.lwjgl.opengl.GL11.glPushMatrix();
org.lwjgl.opengl.GL11.glLoadIdentity();
org.lwjgl.opengl.GL11.glOrtho(0, 800, 600, 0, 1, -1);
org.lwjgl.opengl.GL11.glMatrixMode(org.lwjgl.opengl.GL11.GL_MODELVIEW);
org.lwjgl.opengl.GL11.glDisable(org.lwjgl.opengl.GL11.GL_CULL_FACE);
org.lwjgl.opengl.GL11.glDisable(org.lwjgl.opengl.GL11.GL_DEPTH_TEST);
org.lwjgl.opengl.GL11.glClear(org.lwjgl.opengl.GL11.GL_DEPTH_BUFFER_BIT);
org.lwjgl.opengl.GL11.glLoadIdentity();
// render font
this.drawHudString();
org.lwjgl.opengl.GL11.glEnable(org.lwjgl.opengl.GL11.GL_DEPTH_TEST);
org.lwjgl.opengl.GL11.glEnable(org.lwjgl.opengl.GL11.GL_CULL_FACE);
org.lwjgl.opengl.GL11.glMatrixMode(org.lwjgl.opengl.GL11.GL_PROJECTION);
org.lwjgl.opengl.GL11.glPopMatrix();
org.lwjgl.opengl.GL11.glMatrixMode(org.lwjgl.opengl.GL11.GL_MODELVIEW);
}
}
The render function in this class is called after my 3D objects are rendered. I hope someone can help me out with this!
在渲染我的 3D 对象后调用此类中的渲染函数。我希望有人能帮我解决这个问题！
采纳答案by Hello World
I have created a text class that renders text. It is written in java with LWJGL. Just do drawString("text", positionX, positionY, scale, width);
我创建了一个呈现文本的文本类。它是用 LWJGL 用 Java 编写的。只需执行 drawString("text", positionX, positionY, scale, width);
package text;
import org.lwjgl.opengl.GL11;
public class Text {
public static void drawString(String s, float x, float y, float scale, float width) {
float startX = x;
scale = scale * 0.25f;
GL11.glLineWidth(width);
GL11.glBegin(GL11.GL_LINES);
GL11.glEnable(GL11.GL_LINE_WIDTH);
GL11.glColor3f(1, 1, 1);
boolean space = false;
int charNum = 1, spaceNum = 0;
for (char c : s.toLowerCase().toCharArray()) {
switch(c){
case ' ':
space = true;
break;
case '\n':
y -= 2;
startX -= charNum * (scale * 5);
startX -= spaceNum * (scale * 3);
spaceNum = 0;
charNum = 0;
break;
case 'a':
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + -1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + -1));
GL11.glVertex2f(scale * startX, scale * (y + -1));
GL11.glVertex2f(scale * startX, scale * (y + -1));
GL11.glVertex2f(scale * startX, scale * y);
GL11.glVertex2f(scale * startX, scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * startX, scale * y);
GL11.glVertex2f(scale * startX, scale * (y + 0.5f));
GL11.glVertex2f(scale * startX, scale * (y + 0.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.5f));
break;
case 'b':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
break;
case 'd':
GL11.glVertex2f(scale * startX, scale * (y - 1));
GL11.glVertex2f(scale * startX, scale * (y + 0.8f));
case 'c':
GL11.glVertex2f(scale * startX, scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * startX, scale * (y - 1));
break;
case 'e':
GL11.glVertex2f(scale * startX, scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * startX, scale * y);
GL11.glVertex2f(scale * startX, scale * (y - 0.5f));
GL11.glVertex2f(scale * startX, scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case 'f':
GL11.glVertex2f(scale * (startX + 0.25f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.25f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.25f));
break;
case 'g':
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * (y - 1.5f));
GL11.glVertex2f(scale * (startX), scale * (y - 1.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1.5f));
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1f));
break;
case 'h':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case 'i':
GL11.glVertex2f(scale * (startX - 0.25f), scale * y);
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glEnd();
GL11.glPointSize(width);
GL11.glBegin(GL11.GL_POINTS);
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y + 0.25f));
GL11.glEnd();
GL11.glBegin(GL11.GL_LINES);
break;
case 'j':
GL11.glVertex2f(scale * (startX - 0.25f), scale * y);
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1.5f));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1.5f));
GL11.glEnd();
GL11.glPointSize(width);
GL11.glBegin(GL11.GL_POINTS);
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y + 0.25f));
GL11.glEnd();
GL11.glBegin(GL11.GL_LINES);
break;
case 'k':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y + 0.25f));
break;
case 't':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.15f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.15f));
case 'l':
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
break;
case 'm':
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.25f), scale * y);
GL11.glVertex2f(scale * (startX - 0.25f), scale * y);
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.25f), scale * y);
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case 'p':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1.5f));
case 'o':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
case 'n':
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case 'q':
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case 'r':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 0.15f));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 0.1f));
break;
case 's':
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX), scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX), scale * (y - 0.5f));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
break;
case 'u':
GL11.glVertex2f(scale * (startX - 0.5f), scale * y);
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * y);
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case 'w':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.125f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.125f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX + 0.125f), scale * (y));
break;
case 'v':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y));
break;
case 'x':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
break;
case 'y':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.33f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1.5f));
break;
case 'z':
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case '1':
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.25f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case '2':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.65f));
GL11.glVertex2f(scale * (startX - 0.3f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.3f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.15f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.15f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.35f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
break;
case '3':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
break;
case '4':
GL11.glVertex2f(scale * startX, scale * (y + 0.8f));
GL11.glVertex2f(scale * startX, scale * (y - 1));
GL11.glVertex2f(scale * startX, scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
break;
case '8':
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
case '6':
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
case '5':
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
break;
case '7':
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
break;
case '9':
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
break;
case '0':
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y - 1));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX - 0.5f), scale * (y + 0.8f));
GL11.glVertex2f(scale * (startX), scale * (y + 0.8f));
break;
}
if(!space){
startX += scale * 5;
charNum++;
}else{
startX += scale * 3;
spaceNum++;
}
space = false;
}
GL11.glEnd();
GL11.glDisable(GL11.GL_LINE_WIDTH);
}
}
回答by HenrikD
You have already selected the answer above as solution but you said it doesn't work. The solution is scaling it by 0.01f or something like that depending on your setup. To scale use simply glScale(x,y,z). Also you habe to enable Blending like this:
您已经选择了上面的答案作为解决方案，但您说它不起作用。解决方案是将其缩放 0.01f 或类似的值，具体取决于您的设置。要缩放，只需使用 glScale(x,y,z)。你也必须像这样启用混合：
glEnable(GL11.GL_BLEND);
glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
