extrusion.cpp

This is an example of how to use the CIvfExtrusion class.

// ------------------------------------------------------------
//
// Ivf++ Extrusion example
//
// ------------------------------------------------------------
//
// Author: Jonas Lindemann
//

// ------------------------------------------------------------
// Include files
// ------------------------------------------------------------

#include <ivfui/IvfApplication.h>
#include <ivfui/IvfWindow.h>

#include <ivf/IvfCamera.h>
#include <ivf/IvfAxis.h>
#include <ivf/IvfComposite.h>
#include <ivf/IvfTransform.h>
#include <ivf/IvfLighting.h>
#include <ivf/IvfMaterial.h>
#include <ivf/IvfExtrusion.h>

// ------------------------------------------------------------
// Window class definition
// ------------------------------------------------------------

IvfSmartPointer(CExampleWindow);

class CExampleWindow: public CIvfWindow {
private:
        CIvfCameraPtr           m_camera;
        CIvfCompositePtr        m_scene;
        CIvfLightPtr            m_light;

        double m_angleX;
        double m_angleY;
        double m_moveX;
        double m_moveY;
        double m_zoomX;
        double m_zoomY;

        int m_beginX;
        int m_beginY;

public:
        CExampleWindow(int X, int Y, int W, int H)
                :CIvfWindow(X, Y, W, H) {};

        virtual void onInit(int width, int height);
        virtual void onResize(int width, int height);
        virtual void onRender();
        virtual void onMouseDown(int x, int y);
        virtual void onMouseMove(int x, int y);
        virtual void onMouseUp(int x, int y);
};

// ------------------------------------------------------------
// Window class implementation
// ------------------------------------------------------------

void CExampleWindow::onInit(int width, int height)
{
        // Initialize variables

        m_angleX = 0.0;
        m_angleY = 0.0;
        m_moveX = 0.0;
        m_moveY = 0.0;
        m_zoomX = 0.0;
        m_zoomY = 0.0;

        int i, nSides;
        double r, angle, x, y;

        // Initialize Ivf++ camera

        m_camera = new CIvfCamera();
        m_camera->setPosition(0.0, 5.0, 5.0);

        // Create a materials

        CIvfMaterialPtr yellowMaterial = new CIvfMaterial();
        yellowMaterial->setDiffuseColor(1.0f, 1.0f, 0.0f, 1.0f);
        yellowMaterial->setSpecularColor(1.0f, 1.0f, 1.0f, 1.0f);
        yellowMaterial->setAmbientColor(0.5f, 0.5f, 0.0f, 1.0f);

        // Create scene composite

        m_scene = new CIvfComposite();

        // Create extrusion

        CIvfExtrusionPtr extrusion = new CIvfExtrusion();
        
        // Create section
        
        r = 0.5;
        nSides = 12;
        
        extrusion->setSectionSize(nSides + 1);
        
        for (i = 0; i<=nSides; i++)
        {
                angle = 2.0*M_PI*( ((double)i) / ((double)nSides) );
                x = r * cos(angle);
                y = r * sin(angle);
                extrusion->setSectionCoord(i, x, y);
                extrusion->setSectionNormal(i, x/r, y/r);
        }
        
        // Set spine

        extrusion->setSpineSize(6);
        extrusion->setSpineCoord(0,  0.5,  0.0,  1.5);
        extrusion->setSpineCoord(1,  1.0,  0.0,  1.0);
        extrusion->setSpineCoord(2,  1.0,  0.0, -1.0);
        extrusion->setSpineCoord(3, -1.0,  0.0, -1.0);
        extrusion->setSpineCoord(4, -1.0,  0.0,  1.0);
        extrusion->setSpineCoord(5, -0.5,  0.0,  1.5);

        // Set up-vector
        
        extrusion->setUpVector(0.0, 1.0, 0.0);

        // Set join style

        extrusion->setJoinStyle(TUBE_NORM_EDGE|TUBE_JN_ANGLE|TUBE_JN_CAP);

        // Set other properties

        extrusion->setMaterial(yellowMaterial);
        m_scene->addChild(extrusion);

        // First point
        
        CIvfAxisPtr axis = new CIvfAxis();
        m_scene->addChild(axis);
        
        // Create a light

        CIvfLightingPtr lighting = CIvfLighting::getInstance();

        m_light = new CIvfLight();
        m_light->setLightPosition(1.0, 1.0, 1.0, 0.0);
        m_light->setAmbientColor(0.2f, 0.2f, 0.2f, 1.0f); 
        m_light->enable();
}

// ------------------------------------------------------------
void CExampleWindow::onResize(int width, int height)
{
        m_camera->setPerspective(45.0, 0.1, 100.0);
        m_camera->setViewPort(width, height);
        m_camera->initialize();
}

// ------------------------------------------------------------
void CExampleWindow::onRender()
{
        m_light->render();
        m_camera->render();
        m_scene->render();
}

// ------------------------------------------------------------
void CExampleWindow::onMouseDown(int x, int y)
{
        m_beginX = x;
        m_beginY = y;
}

// ------------------------------------------------------------
void CExampleWindow::onMouseMove(int x, int y)
{
        m_angleX = 0.0;
        m_angleY = 0.0;
        m_moveX = 0.0;
        m_moveY = 0.0;
        m_zoomX = 0.0;
        m_zoomY = 0.0;

        if (isLeftButtonDown())
        {
                m_angleX = (x - m_beginX);
                m_angleY = (y - m_beginY);
                m_beginX = x;
                m_beginY = y;
                m_camera->rotatePositionY(m_angleX/100.0);
                m_camera->rotatePositionX(m_angleY/100.0);
                redraw();
        }

        if (isRightButtonDown())
        {
                if (getModifierKey() == CIvfWidgetBase::MT_SHIFT)
                {
                        m_zoomX = (x - m_beginX);
                        m_zoomY = (y - m_beginY);
                }
                else
                {
                        m_moveX = (x - m_beginX);
                        m_moveY = (y - m_beginY);
                }
                m_beginX = x;
                m_beginY = y;

                m_camera->moveSideways(m_moveX/100.0);
                m_camera->moveVertical(m_moveY/100.0);
                m_camera->moveDepth(m_zoomY/50.0);

                redraw();
        }
}

// ------------------------------------------------------------
void CExampleWindow::onMouseUp(int x, int y)
{
        m_angleX = 0.0;
        m_angleY = 0.0;
        m_moveX = 0.0;
        m_moveY = 0.0;
        m_zoomX = 0.0;
        m_zoomY = 0.0;
}

// ------------------------------------------------------------
// Main program
// ------------------------------------------------------------

int main(int argc, char **argv) 
{
        // Create Ivf++ application object.

        CIvfApplicationPtr app = new CIvfApplication(IVF_DOUBLE|IVF_RGB);

        // Create a window

        CExampleWindowPtr window = new CExampleWindow(0, 0, 512, 512);

        // Set window title and show window

        window->setWindowTitle("Ivf++ Extrusion example");
        window->show();

        // Enter main application loop

    app->run();

        return 0;
}

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