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Thread: glGetVertexAttribPointerv usage

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  1. #1
    Junior Member Newbie
    Join Date
    Feb 2015
    Posts
    9

    glGetVertexAttribPointerv usage

    I want to use this function to get data back from vbo to a pointer, where p[0]=x p[2]=y p[3]=z and so on.

    Code :
    ...
    glEnableVertexAttribArray(0);
    GLfloat *ptr = (float*)calloc(vcount* 3, sizeof(float)); //pointer with preallocated memory. 
    GIvoid *vptr;
    glGetVertexAttribPointerv(0, GL_VERTEX_ATTRIB_ARRAY_POINTER,&vptr);
    ptr = (GLfloat*)&vptr;

    Shouldn't ptr[0] be the x value of the first vertex??

    Thanks
    Last edited by ionas_; 01-31-2016 at 06:21 AM.

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