source: nanovis/tags/1.2.3/graphics/Geometry.cpp @ 6369

/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *  Copyright (c) 2004-2013  HUBzero Foundation, LLC
 */

#include <GL/glew.h>
#include <GL/gl.h>

#include "Geometry.h"

using namespace nv::graphics;

Geometry::Geometry(int primitive,
                   VertexBuffer *vertexBuffer, 
                   IndexBuffer *indexBuffer) : 
    _vertexBuffer(vertexBuffer), 
    _colorBuffer(0),
    _indexBuffer(indexBuffer), 
    _primitiveType(primitive)
{
}

Geometry::Geometry(int primitive,
                   VertexBuffer *vertexBuffer, 
                   VertexBuffer *colorBuffer,
                   IndexBuffer *indexBuffer) : 
    _vertexBuffer(vertexBuffer), 
    _colorBuffer(colorBuffer),
    _indexBuffer(indexBuffer), 
    _primitiveType(primitive) 
{
}

Geometry::~Geometry()
{
}

void 
Geometry::render()
{
    //glDisableClientState(GL_NORMAL_ARRAY);
    //glDisableClientState(GL_TEXTURE_COORD_ARRAY);
    glEnableClientState(GL_VERTEX_ARRAY);
    glBindBuffer(GL_ARRAY_BUFFER, _vertexBuffer->getGraphicObjectID());
    glVertexPointer(3, GL_FLOAT, 0, 0);

    if (_colorBuffer) {
        glEnableClientState(GL_COLOR_ARRAY);
        glBindBuffer(GL_ARRAY_BUFFER, _colorBuffer->getGraphicObjectID());
        glColorPointer(3, GL_FLOAT, 0, 0);
    } else {
        glDisableClientState(GL_COLOR_ARRAY);
    }
    glBindBuffer(GL_ARRAY_BUFFER, 0);

    if (_indexBuffer) {
        glDrawElements(GL_QUADS, _indexBuffer->getIndexCount(), GL_UNSIGNED_INT, 
                       _indexBuffer->getData());
    } else {
        glBindBuffer(GL_ARRAY_BUFFER, 0);
        glDrawArrays(_primitiveType, 0, _vertexBuffer->getVertexCount());
    }

    glDisableClientState(GL_VERTEX_ARRAY);
    if (_colorBuffer) {
        glDisableClientState(GL_COLOR_ARRAY);
    }
}