renderer.cpp

/* Copyright (c) 2011, Stefan Eilemann <eile@eyescale.ch> 
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Eyescale Software GmbH nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "renderer.h"

// light parameters
static GLfloat lightPosition[] = {0.0f, 0.0f, 1.0f, 0.0f};
static GLfloat lightAmbient[]  = {0.1f, 0.1f, 0.1f, 1.0f};
static GLfloat lightDiffuse[]  = {0.8f, 0.8f, 0.8f, 1.0f};
static GLfloat lightSpecular[] = {0.8f, 0.8f, 0.8f, 1.0f};

// material properties
static GLfloat materialAmbient[]  = {0.2f, 0.2f, 0.2f, 1.0f};
static GLfloat materialDiffuse[]  = {0.8f, 0.8f, 0.8f, 1.0f};
static GLfloat materialSpecular[] = {0.5f, 0.5f, 0.5f, 1.0f};
static GLint  materialShininess   = 64;

namespace seqPly
{

bool Renderer::init( co::Object* initData )
{
    _state = new State( glewGetContext( ));
    return seq::Renderer::init( initData );
}

bool Renderer::exit()
{
    _state->deleteAll();
    delete _state;
    _state = 0;
    return seq::Renderer::exit();
}

void Renderer::draw( co::Object* frameDataObj )
{
    const FrameData* frameData = static_cast< FrameData* >( frameDataObj );
    Application& application = static_cast< Application& >( getApplication( ));
    const eq::uint128_t id = frameData->getModelID();
    const Model* model = application.getModel( id );
    if( !model )
        return;

    applyRenderContext();

    glLightfv( GL_LIGHT0, GL_POSITION, lightPosition );
    glLightfv( GL_LIGHT0, GL_AMBIENT,  lightAmbient  );
    glLightfv( GL_LIGHT0, GL_DIFFUSE,  lightDiffuse  );
    glLightfv( GL_LIGHT0, GL_SPECULAR, lightSpecular );

    glMaterialfv( GL_FRONT, GL_AMBIENT,   materialAmbient );
    glMaterialfv( GL_FRONT, GL_DIFFUSE,   materialDiffuse );
    glMaterialfv( GL_FRONT, GL_SPECULAR,  materialSpecular );
    glMateriali(  GL_FRONT, GL_SHININESS, materialShininess );

    applyModelMatrix();

    glColor3f( .75f, .75f, .75f );

    // Compute cull matrix
    const eq::Matrix4f& modelM = getModelMatrix();
    const eq::Matrix4f& view = getViewMatrix();
    const eq::Frustumf& frustum = getFrustum();
    const eq::Matrix4f projection = frustum.compute_matrix();
    const eq::Matrix4f pmv = projection * view * modelM;
    const seq::RenderContext& context = getRenderContext();

    _state->setProjectionModelViewMatrix( pmv );
    _state->setRange( &context.range.start );
    _state->setColors( model->hasColors( ));
    
    model->cullDraw( *_state );
}

}