Android - 移動我的遊戲背景horizo​​ntaly（OpenGL）

Question

我正在爲我的大學項目製作一個2D遊戲，而我在這一點上被卡住了。基本上是 。我有一個背景，我想從右向左移動（按住手機按鈕）。問題是，無論我嘗試它從上到下。我在OpenGL中創建引擎，並且擁有保存三角紋理座標的類。不知何故，我強迫背景倒退，但我無法改變方向。 這裏是源代碼（scrollBackground方法）：

package com.example.spaceimpact_remake; 

import javax.microedition.khronos.egl.EGLConfig; 
import javax.microedition.khronos.opengles.GL10; 

import android.opengl.GLSurfaceView.Renderer; 

public class GameRenderer implements Renderer{ 

    private Background background = new Background(); 
    private Background background2 = new Background(); 

    private float bgScroll1; 
    private float bgScroll2; 


    @Override 
    public void onDrawFrame(GL10 gl) { 
     try{ 
      Thread.sleep(SFEngine.GAME_THREAD_FPS_SLEEP); 
     } catch (InterruptedException e){ 
      e.printStackTrace(); 
     } 
     gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); 

     scrollBackground1(gl); 
     scrollBackground2(gl); 

     gl.glEnable(GL10.GL_BLEND); 
     gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE); 

     } 

    private void scrollBackground1(GL10 gl){ 
     if (bgScroll1 == Float.MAX_VALUE){ 
      bgScroll1 = 0f; 
     } 
     gl.glMatrixMode(GL10.GL_MODELVIEW); 
     gl.glLoadIdentity(); 
     gl.glPushMatrix(); 
     gl.glScalef(1f, 1f, 1f); 
     gl.glTranslatef(0f, 0f, 0f); 

     gl.glMatrixMode(GL10.GL_TEXTURE); 
     gl.glLoadIdentity(); 
     gl.glTranslatef(0.0f, bgScroll1, -0.0f); //przewijanie tekstury 

     background.draw(gl); 
     gl.glPopMatrix(); 
     bgScroll1 += SFEngine.SCROLL_BACKGROUND_1; 
     gl.glLoadIdentity(); 
    } 

    private void scrollBackground2(GL10 gl){ 
     if (bgScroll1 == Float.MAX_VALUE){ 
      bgScroll1 = 0f; 
     } 
     gl.glMatrixMode(GL10.GL_MODELVIEW); 
     gl.glLoadIdentity(); 
     gl.glPushMatrix(); 
     gl.glScalef(1f, 1f, 1f); 
     gl.glTranslatef(0f, 0f, 0f); 

     gl.glMatrixMode(GL10.GL_TEXTURE); 
     gl.glLoadIdentity(); 
     gl.glTranslatef(0.0f, bgScroll2, 0.0f); 

     background2.draw(gl); 
     gl.glPopMatrix(); 
     bgScroll2 += SFEngine.SCROLL_BACKGROUND_2; 
     gl.glLoadIdentity(); 

    } 

    @Override 
    public void onSurfaceChanged(GL10 gl, int width, int height) { 
     gl.glViewport(0, 0, width, height); 
     gl.glMatrixMode(GL10.GL_PROJECTION); 
     gl.glLoadIdentity(); 
     gl.glOrthof(0f, 1f, 0f, 1f, -1f, 1f); 
    } 

    @Override 
    public void onSurfaceCreated(GL10 gl, EGLConfig config) { 
     //włączenie w OpenGL mapowania tekstur 2D 
     gl.glEnable(GL10.GL_TEXTURE_2D); 
     gl.glClearDepthf(1.0f); 
     gl.glEnable(GL10.GL_DEPTH_TEST); 
     gl.glDepthFunc(GL10.GL_LEQUAL); 

     //przeźroczystość 
     gl.glEnable(GL10.GL_BLEND); 
     gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE); 

     background.loadTexture(gl, SFEngine.BACKGROUND_LAYER_ONE, SFEngine.context); 
     background2.loadTexture(gl, SFEngine.BACKGROUND_LAYER_TWO, SFEngine.context); 
    } 

} 

Answer 1

你的問題似乎是在這裏; glTranslatef（X，Y，Z）;修改Y分量。嘗試將bgScroll1移動到X位置。

gl.glTranslatef(bgScroll1, 0.0f, 0.0f); //przewijanie tekstury