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跟进问题：

  • 我需要为 FBO 设置不同的活动纹理吗？这可能是原因，因为我没有考虑到这一点。无论哪种方式，我的活动纹理都有问题。如果我在这一切之前将活动纹理设置为 TEXTURE_1，我会得到对象的纹理（但是错误的纹理）。

    for (int side = 0; side < 2; side++)
{

    glPushAttrib(GL_ALL_ATTRIB_BITS);
    glBindTexture(GL_TEXTURE_2D, 0); // Delete this line and a, wrong, texure pops up for the second iteration
    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, modelsFboId[side]);

    glViewport(0,0,screenWidth,screenHeight);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(SCREEN_FOV, SCREEN_RAT, NEAR, FAR);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glShadeModel(GL_SMOOTH);
    glHint(GL_PERSPECTIVE_CORRECTION_HINT,
        GL_NICEST);
    glDisable(GL_BLEND);
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glDepthMask(true);
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClearDepth(1.0f);
    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glLoadIdentity (); 

    camera.look();

    drawObject();

    glDisable(GL_DEPTH_TEST);
    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

    glPopAttrib();
}

我循环了两个 fbo，它们也是在一个循环中创建的。fbo 工作正常，但是纹理不想绑定的第二次迭代。我尝试为第二次迭代切换到不同的活动纹理，我禁用了一个着色器，我也尝试设置 clientactivetexture。如果我跳过第一次迭代，则第二个循环不起作用。当我附加颜色而不是纹理时，对象会显示（它根本不显示纹理绑定）。

我试图追踪这个错误两天了，但无济于事。

此外，在这个循环之后，我有第二个循环，它是相同的，除了它使用一个显示列表，它对两个迭代都很好，这可能表明了一些事情。

    for (int side = 0; side < 2; side++) {
        modelsFboId[side] = glGenFramebuffersEXT();                                     
        modelsFboTextureId[side] = glGenTextures();                                     
        modelsDepthRenderBufferId[side] = glGenRenderbuffersEXT();

        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, modelsFboId[side]);    

        glBindTexture(GL_TEXTURE_2D, modelsFboTextureId[side]);                             
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);                       
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);           
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, screenWidth, screenHeight, 0,GL_RGBA, GL_INT, (java.nio.ByteBuffer) null); 
        glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D, modelsFboTextureId[side], 0); 

        glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, modelsDepthRenderBufferId[side]);         
        glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, screenWidth, screenHeight);
        glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,GL_DEPTH_ATTACHMENT_EXT,GL_RENDERBUFFER_EXT, modelsDepthRenderBufferId[side]); 
        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
      }

绘制对象（）：

   // using bind slick, texture int doesn't change in this function nor any other

    if (textureMode == 1) {
        glColor3f(color.x, color.y, color.z);
    } else if (textureMode == 0) {
        glColor3f(1.0f, 1.0f, 1.0f);
        glEnable(GL_TEXTURE_2D);
        textures[texture].bind();
    }

    glPushMatrix();
    ..rotations.. all seems definitely fine here and certainly doesn't change in correspondence to the prev iteration.

    .. draw actual object.. tried LWJGL sphere, a simple cube and some other LWJGL objects
    glPopMatrix();

    if (textureMode == 0)
        glDisable(GL_TEXTURE_2D);

数组初始化..

int skyFboId[] = {-1, -1};
int skyFboTextureId[] = {-1, -1};

int modelsFboId[] = {-1, -1};
int modelsFboTextureId[] = {-1, -1};
int modelsDepthRenderBufferId[] = {-1, -1};

int listModelsFboId[] = {-1, -1};
int listModelsFboTextureId[] = {-1, -1};
int listModelsDepthRenderBufferId[] = {-1, -1};
int listModelsTextureLocation = -1;
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1 回答 1

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显然，Slick 库需要使用 TextureImpl.unbind() 取消绑定纹理。

于 2013-02-18T13:32:09.180 回答