npr/vertexarray.cpp at master · blendmaster/npr · GitHub

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#include<GL/glew.h>
#include<GL/gl.h>
#include<vector>
#include<cassert>
#include<iostream>
#include<cstdlib>

#include"vertexarray.h"

usingnamespacestd;

namespaceEZGraphics {

/* ------------------------------------------- */

VertexArray::VertexArray ( const VertexArray & rhs )
{
 cerr << "Attempting to copy VertexArray object" << endl;
exit(1);
}

/* ------------------------------------------- */

VertexArray & VertexArray::operator= ( const VertexArray & rhs )
{
 cerr << "Attempting assignment of VertexArray object" << endl;
exit(1);
}

/* ------------------------------------------- */

VertexArray::VertexArray()
{
glGenVertexArrays(1,&handle);
}

/* ------------------------------------------- */

VertexArray::~VertexArray()
{
assert(glIsVertexArray(handle));
glDeleteVertexArrays(1,&handle);
}

/* ------------------------------------------- */

voidVertexArray::attachInstancedAttribute ( const GLuint aix, const Buffer * b, GLuint divisor )
{
glBindVertexArray(handle);
 b->setIndex(aix);
glEnableVertexAttribArray(aix);
glVertexAttribDivisor(aix,divisor);
glBindVertexArray(0);
}

/* ------------------------------------------- */

voidVertexArray::attachAttribute ( const GLuint aix, const Buffer * b )
{
glBindVertexArray(handle);
 b->setIndex(aix);
glEnableVertexAttribArray(aix);
glBindVertexArray(0);
}

/* ------------------------------------------- */

voidVertexArray::on()
{
glBindVertexArray(handle);
}

/* ------------------------------------------- */

voidVertexArray::off()
{
glBindVertexArray(0);
}

/* ------------------------------------------- */

voidVertexArray::sendToPipeline ( GLenum ptype, GLint first, GLsizei num )
{
on();
glDrawArrays(ptype,first,num);
off();
}

/* ------------------------------------------- */

voidVertexArray::sendToPipelineInstanced ( GLenum ptype, GLint first, GLsizei num, GLsizei N )
{
on();
glDrawArraysInstanced(ptype,first,num,N);
off();
}

/* ------------------------------------------- */

voidVertexArray::setDivisor ( GLuint aix, GLuint divisor )
{
on();
glVertexAttribDivisor(aix,divisor);
off();
}

/* ------------------------------------------- */

voidVertexArray::resetDivisor ( GLuint aix )
{
setDivisor(aix,0);
}

/* ------------------------------------------- */

voidVertexArray::sendToPipelineIndexed ( GLenum ptype, IndexBuffer *b, GLint first, GLsizei num )
{
on();
 b->on();
glDrawElements(ptype,num,b->getType(),(GLvoid*)(long)first);
 b->off();
off();
}

/* ------------------------------------------- */


voidVertexArray::sendToPipelineInstancedIndexed ( GLenum ptype, IndexBuffer *b, GLint first, GLsizei num, GLsizei N )
{
on();
 b->on();
glDrawElementsInstanced(ptype,num,b->getType(),(GLvoid*)(long)first,N);
 b->off();
off();
}

/* ------------------------------------------- */

};