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Thread: PBO

  1. #1
    Junior Member Newbie
    Join Date
    Feb 2008
    Posts
    2

    PBO

    i want to map the texture to geometry with using PBO.when i use the following code. the geometry is mapped strange way.where is the error.i apologize to you.i am not good on english.

    void init(){
    glClearColor(0,0,0,0);
    glShadeModel(GL_SMOOTH);


    glGenTextures(1,&textureObject);
    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D,textureObject);
    glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTE R,GL_LINEAR);
    glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTE R,GL_LINEAR);

    int w=tga.GetImageWidth();
    int h=tga.GetImageHeight();
    unsigned char* data=tga.GetPixels();

    glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,w,h,0,GL_RGB,G L_UNSIGNED_BYTE,data);

    if(GLEE_ARB_pixel_buffer_object){
    glGenBuffers(1,&PBO);
    glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB,PBO);
    glBufferData(GL_PIXEL_UNPACK_BUFFER_ARB,w*h*3,0,GL _STATIC_DRAW);
    void* temp=glMapBuffer(GL_PIXEL_UNPACK_BUFFER_ARB,GL_WRI TE_ONLY_ARB);
    memcpy(temp,data,w*h*3);
    glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB);
    glTexSubImage2D(GL_TEXTURE_2D,0,0,0,w,h,GL_RGB,GL_ UNSIGNED_BYTE,(void*)0);
    glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB,0);
    }


    // Sisteme göre VBO yada VertexArray oluşturuluyor...
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
    if(GLEE_ARB_vertex_buffer_object){
    glGenBuffers(1,&VBO);
    glBindBuffer(GL_ARRAY_BUFFER_ARB,VBO);
    glBufferData(GL_ARRAY_BUFFER_ARB,(6*4*3*sizeof(flo at))+(6*4*2*sizeof(float)),NULL,GL_STATIC_DRAW);
    glBufferSubData(GL_ARRAY_BUFFER_ARB,0,6*4*3*sizeof (float),vertex);
    glBufferSubData(GL_ARRAY_BUFFER_ARB,6*4*3*sizeof(f loat),6*4*2*sizeof(float),texCoord);

    glVertexPointer(3,GL_FLOAT,0,0);
    glTexCoordPointer(2,GL_FLOAT,0,(void*)(6*4*3*sizeo f(float)));

    }
    else{
    glVertexPointer(3,GL_FLOAT,0,vertex);
    glTexCoordPointer(2,GL_FLOAT,0,texCoord);
    }

    }

  2. #2
    Junior Member Newbie
    Join Date
    Feb 2008
    Posts
    2

    Re: PBO

    hi
    i have a wood texture.when i want to use mapping texture to geometry with using PBO.geometry is mapped white-black pattern .where is the problem.thanks in advance.

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