OpenGL_Fundamentals/VertexArray.cpp at master · thederickff/OpenGL_Fundamentals · GitHub

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#include "VertexArray.h"
#include "VertexBufferLayout.h"

VertexArray::VertexArray()
{
    GLCall(glGenVertexArrays(1, &m_RendererId));
}

VertexArray::~VertexArray()
{
    GLCall(glDeleteVertexArrays(1,&m_RendererId));
}

void VertexArray::AddBuffer(const VertexBuffer &vb, const VertexBufferLayout &layout)
{
    Bind();
    vb.Bind();
    const auto& elements = layout.GetElements();
    unsigned int offset = 0;

    for (unsigned int i = 0; i < elements.size(); ++i)
    {
        const auto& element = elements[i];
        GLCall(glEnableVertexAttribArray(i));
        GLCall(glVertexAttribPointer(i, element.count, element.type, element.normalized, layout.GetStride(), reinterpret_cast<const void*>(offset)));
        offset += element.count * VertexBufferLayoutElement::GetSizeOfType(element.type);
    }
}

void VertexArray::Bind() const
{
    GLCall(glBindVertexArray(m_RendererId));
}

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