vertexarray.cpp

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#include <pch.hpp>
#include <vertexarray.hpp>
 
VertexArray::VertexArray(){
    glGenVertexArrays(1,&m_ID);
    glBindVertexArray(m_ID);
}
    
VertexArray::~VertexArray(){
    glDeleteVertexArrays(1,&m_ID);
}
 
void VertexArray::AddBuffer(const VertexBuffer &vb,const VertexBufferLayout &layout){
    Bind();
    vb.Bind();
    unsigned int offset=0;
    const auto &elements=layout.GetElements();
    for(unsigned int i=0;i<elements.size();i++){
        const auto &element=elements[i];
        glEnableVertexAttribArray(i);
        glVertexAttribPointer(i,element.count,element.type,element.normalized,layout.GetStride(),(const void*)offset);
        offset+=element.count*VertexBufferElement::GetSizeOfType(element.type);
    }
}
 
void VertexArray::DisableAttribs(const VertexBufferLayout &layout){
    const auto &elements=layout.GetElements();
    for(unsigned int i=0;i<elements.size();i++)
        glDisableVertexAttribArray(i);
}
 
void VertexArray::Bind() const{
    glBindVertexArray(m_ID);
}
 
void VertexArray::Unbind() const{
    glBindVertexArray(0);
}