LWJGL紋理不渲染

Question

我一直在嘗試在lwjgl中編寫遊戲引擎，並且遇到渲染問題，我想要一些幫助。基本上，我已經在lwjgl-basics（GitHub上的mattdesl）中遵循了一些步驟，並在我的渲染器中生成了一個Texture類和一個部分，但它們不會渲染紋理。這裏的代碼...

public void drawTexturedRectangle(float x1, float y1, float w, float h, Texture t){ 
     t.bind(); 
     GL11.glColor4f(1.0f, 0, 1.0f, 1.0f); 
     GL11.glBegin(GL11.GL_QUADS); 
     GL11.glTexCoord2f(0, 0); 
     GL11.glVertex2f(x1, y1); 
     GL11.glTexCoord2f(1.0f, 0); 
     GL11.glVertex2f(x1 + w, y1); 
     GL11.glTexCoord2f(1.0f, 1.0f); 
     GL11.glVertex2f(x1 + w, y1 + h); 
     GL11.glTexCoord2f(0, 1.0f); 
     GL11.glVertex2f(x1, y1 + h); 
     GL11.glEnd(); 
    } 

這就是它呈現的地方。這裏的結構類：

package com.nightfall.morningside; 

import java.io.*; 
import java.net.URL; 
import java.nio.ByteBuffer; 

import de.matthiasmann.twl.utils.*; 

import org.lwjgl.opengl.*; 
import org.lwjgl.opengl.GL12.*; 
import org.lwjgl.BufferUtils; 

public class Texture { 
    public int width; 
    public int height; 
    public int id; 

    public Texture(URL pathToTexture){ 
     try { 
      InputStream pngstream = pathToTexture.openStream(); 
      PNGDecoder pngdecoder = new PNGDecoder(pngstream); 

      width = pngdecoder.getWidth(); 
      height = pngdecoder.getHeight(); 

      int bpp = 4; 

      ByteBuffer buffer = BufferUtils.createByteBuffer(bpp * width * height); 

      pngdecoder.decode(buffer, width * bpp, PNGDecoder.Format.RGBA); 

      buffer.flip(); 

      id = GL11.glGenTextures(); 

      GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1); 

      GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_NEAREST); 
      GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST); 
      GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE); 
      GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE); 

      GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, width, height, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, buffer); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    public void bind(){ 
     GL11.glBindTexture(GL11.GL_TEXTURE_2D, id); 
    } 
} 

的TexturedRectangle類：

package com.nightfall.morningside.geometry; 

import com.nightfall.morningside.Texture; 
import com.nightfall.morningside.Textured; 

public class TexturedRectangle extends Rectangle implements Textured{ 
    public Texture texture; 

    public TexturedRectangle(float xone, float yone, float w, float h, Texture t) { 
     super(xone, yone, w, h); 
     texture = t; 
    } 

    public Texture getTexture() { 
     return texture; 
    } 

} 

Rectangle類：

package com.nightfall.morningside.geometry; 

public class Rectangle { 
    private float x1; 
    private float y1; 
    private float width; 
    private float height; 

    public Rectangle(float xone, float yone, float w, float h){ 
     x1 = xone; 
     y1 = yone; 
     width = w; 
     height = h; 
    } 

    public float getX1(){ 
     return x1; 
    } 

    public float getY1(){ 
     return y1; 
    } 

    public float getHeight(){ 
     return height; 
    } 

    public float getWidth(){ 
     return width; 
    } 

    public Point getLocation(){ 
     return new Point(x1, y1); 
    } 
} 

而且質感的界面：

package com.nightfall.morningside; 

public interface Textured { 
    public Texture getTexture(); 
} 

和點類：

package com.nightfall.morningside.geometry; 

public class Point { 
    private float x1; 
    private float y1; 

    public Point(float x, float y){ 
     x1 = x; 
     y1 = y; 
    } 

    public float getX(){ 
     return x1; 
    } 

    public float getY(){ 
     return y1; 
    } 
} 

我希望這是一切。我相信這是我渲染的一個問題，但在我加載紋理的位置可能存在問題。 如果您需要其他任何東西，我會爲您安排。 謝謝。

Answer 1

默認情況下，紋理處於禁用狀態。當你想呈現一個原始的紋理（一個紋理例如四），您必須激活紋理與

glEnable(GL_TEXTURE2D); 
glBindTexture(GL_TEXTURE_2D, textureId); 

第一行告訴OpenGL使用紋理，第二個指定紋理要使用。

要停止使用紋理，你可以：

• 綁定零到GL_TEXTURE_2D：glBindTexture(GL_TEXTURE_2D, 0);或
• 禁用GL_TEXTURE_2D：glDisable(GL_TEXTURE_2D);

編輯，我忘記了所有的GLxx.前綴（靜態導入我的代碼）