尝试在LWJGL中将纹理绑定到四边形

Question

我正试图用LWJGL将一个简单的纹理绑定到一个quad。

到目前为止，我已经做了一个四边形，我可以用箭头键四处移动，但是当我尝试使用.bind（）方法为其添加纹理时，什么也没发生。

这是我的代码：

    import java.io.*;
    import org.lwjgl.LWJGLException;
    import org.lwjgl.input.Keyboard;
    import org.lwjgl.opengl.Display;
    import org.lwjgl.opengl.DisplayMode;
    import org.lwjgl.opengl.GL11;
    import org.newdawn.slick.Color;
    import org.newdawn.slick.opengl.Texture;
    import org.newdawn.slick.opengl.TextureLoader;
    import org.newdawn.slick.util.ResourceLoader;

    public class Test {
        Texture texture;
        boolean stop;
        float x = 400;
        float y = 300;
        public Test(){
            stop = false;
        }
        public static void main(String [ ] args){
            Test game = new Test();
            game.start();
        }
        public void start(){
            try{
                Display.setDisplayMode(new DisplayMode(800, 600));
                Display.setTitle("Jepla");
                Display.create();
                Display.setVSyncEnabled(true);
            }
            catch(LWJGLException e){
                System.out.println(e);
            }
            initGL();
            while(!Display.isCloseRequested()){
                updateGL();
                renderGL();
                Display.update();
                Display.sync(120);
            }
            Display.destroy();
        }
        public void initGL(){
            GL11.glMatrixMode(GL11.GL_PROJECTION);
            GL11.glLoadIdentity();
            GL11.glOrtho(0, 800, 0, 600, 1, -1);
            GL11.glMatrixMode(GL11.GL_MODELVIEW);
            try{
                texture = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("men.png"));
                System.out.println("Texture loaded: "+texture);
                System.out.println(">> Image width: "+texture.getImageWidth());
                System.out.println(">> Image height: "+texture.getImageHeight());
                System.out.println(">> Texture width: "+texture.getTextureWidth());
                System.out.println(">> Texture height: "+texture.getTextureHeight());
                System.out.println(">> Texture ID: "+texture.getTextureID());
            }
            catch(IOException ioe){
                System.out.println(ioe);
            }
        }
        public void renderGL(){
            GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
            GL11.glColor3f(0.5f,0.5f,0.2f);
            GL11.glBindTexture(GL11.GL_TEXTURE_2D, texture.getTextureID());
            GL11.glPushMatrix();
                GL11.glBegin(GL11.GL_QUADS);
                    GL11.glVertex2f(x,y);
                    GL11.glVertex2f(x+texture.getTextureWidth(),y);
                    GL11.glVertex2f(x+texture.getTextureWidth(),y+texture.getTextureHeight());
                    GL11.glVertex2f(x,y+texture.getTextureHeight());
                GL11.glEnd();
            GL11.glPopMatrix();

        }
        public void updateGL(){
            if (Keyboard.isKeyDown(Keyboard.KEY_LEFT)) x = x-1;
            if (Keyboard.isKeyDown(Keyboard.KEY_RIGHT)) x = x+1;
            if (Keyboard.isKeyDown(Keyboard.KEY_UP)) y = y+1;
            if (Keyboard.isKeyDown(Keyboard.KEY_DOWN)) y = y-1;
            if (x < 0) x = 0;
            if (x > 800) x = 800;
            if (y < 0) y = 0;
            if (y > 600) y = 600;
        }
    }

Answer 1

您需要启用纹理

glEnable(GL_TEXTURE_2D);

此外，你需要告诉opengl在哪里固定纹理，就像这个一样

texture.bind();
glBegin(GL11.GL_QUADS);
                glTexCoord2f(0, 0); // top left
                glVertex2f(x,y);
                glTexCoord2f(0, 1); // bottom left 
                glVertex2f(x, y + objects_Y_size);
                glTexCoord2f(1, 1); // bottom right
                glVertex2f(x + objects_X_size,y + objects_Y_size);
                glTexCoord2f(1, 0); // top right
                glVertex2f(x + objects_X_size, y);
            glEnd();

我不是opengl或LWJGL的专业人员，但我总是以上面代码中看到的方式绑定纹理

您也可以避免使用GL11。如果你像这个一样导入opengl，每次调用

import static org.lwjgl.opengl.GL11.*;

gl-budy