File VertexArray.cpp

File List > render > VertexArray.cpp

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#include "VertexArray.h"

void VertexArray::_delVAO()
{
    glDeleteVertexArrays(3, &vao_id);
    vao_id = 0;
}

VertexArray::VertexArray()
{
    glGenVertexArrays(3, &vao_id);
}

VertexArray::VertexArray(const VertexArray& vao)
{
    _resetVAOID(vao.GetVertArrayID());
    vao_stride = vao.vao_stride;
}

VertexArray::VertexArray(VertexArray&& vao) noexcept
{
    _resetVAOID(vao.GetVertArrayID());
    vao.vao_id = 0;
    vao_stride = vao.vao_stride;
}

VertexArray::~VertexArray()
{
    if (GetVertArrayID() != 0)
        _delVAO();
}

VertexArray& VertexArray::operator=(const VertexArray& vao)
{
    _resetVAOID(vao.GetVertArrayID());
    vao_stride = vao.vao_stride;

    return *this;
}

VertexArray& VertexArray::operator=(VertexArray&& vao) noexcept
{
    _resetVAOID(vao.GetVertArrayID());
    vao.vao_id = 0;
    vao_stride = vao.vao_stride;

    return *this;
}

void VertexArray::AddBuffer(VertexBuffer& vb, BufferLayout bl)
{
    vb.Bind();
    Bind();

    const auto& eles = bl.GetEles(); //get the list of layout patterns
    GLuint offset = 0;

    for (GLuint i = 0;i < eles.size();i++)
    {
        const auto& ele = eles[i];
        //allocate all the elements in vertexArray

        glEnableVertexAttribArray(i);
                        //attrib id//ele cont//ele type//is_norm//size per vertex//offset per attrib
        glVertexAttribPointer(i, ele.count, ele.type, ele.is_norm, bl.GetStride(), (const void*)offset);
        offset += ele.count * BufferElement::getTypeSize(ele.type);
    }
    vb.Unbind();
    Unbind();

    vao_stride = bl.GetStride();
}

void VertexArray::Bind() const
{
    glBindVertexArray(vao_id);
}

void VertexArray::Unbind() const
{
    glBindVertexArray(0);
}