ScreenQuad.cpp

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#include "ScreenQuad.h"
#include "ngl/ShaderManager.h"
#include "ngl/Types.h"
#include "ngl/TransformStack.h"

#ifdef DARWIN
  #define glGenVertexArrays glGenVertexArraysAPPLE
  #define glBindVertexArray glBindVertexArrayAPPLE
#endif

ScreenQuad::ScreenQuad(){}
ScreenQuad::ScreenQuad(const float &_x,const float &_y,const float &_depth,const float &_extent)
{
    m_x = _x;
    m_y = _y;
    m_depth = _depth;
    m_extent = _extent;
}
ScreenQuad::~ScreenQuad(){}

void ScreenQuad::draw(const std::string &_shaderName, unsigned int &_vao)
{
    ngl::ShaderManager *shader = ngl::ShaderManager::instance();
    (*shader)[_shaderName]->use();

    shader->setShaderParam4f(_shaderName, "u_CentreDepthExtent",
                             m_x,
                             m_y,
                             m_depth,
                             m_extent);

    // now we bind back our vertex array object and draw
    glBindVertexArray(_vao);    // select first VAO

    glDrawArrays(GL_QUADS, 0, 4); // draw first object

    // go back to default just incase
    glEnableVertexAttribArray(0);
    glBindVertexArray(0);
}