3.3.20 SphereWithColorEyeLightPositioner

 In OZ++2.0.24 library, we have added new classes Positioner, ColorPositioner, EyePositioner, LightPositiner, and ColorEyeLightPositioner to 'oz++/motif' folder. Those have been implemented by Motif ScrollBar triplet.

  BulletinBoard
  
    Positioner
    
      ColorPositioner
      
      EyePositioner
      
      LightPositioner
      
    ColorEyeLightPositioner

The following SphereWithColorEyeLightPositioner is a very simple sample program to draw Sphere by using those classes.




//
//SphereWithColorEyeLightPositioner.cpp
//Copyright (c) 2016 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.

#include <oz++/motif/ColorEyeLightPositioner.h>
#include <oz++/opengl/OpenGLMainView.h>
#include <oz++/opengl/OpenGLForm.h>
#include <oz++/opengl/OpenGLView.h>
#include <oz++/opengl/OpenGLGC.h>
#include <oz++/opengl/OpenGLLight.h>
#include <oz++/opengl/OpenGLMaterial.h>
#include <oz++/opengl/OpenGLSphere.h>

namespace OZ {

class MainView :public OpenGLMainView {

private:
  //Inner class start
  class SimpleView: public OpenGLView {
  private:
    OpenGLGC gc;
    SmartPtr<OpenGLQuadric> quadric;
    SmartPtr<OpenGLSphere> sphere;
    ColorEyeLightPositioner* positioner; //Shallow copy
 
  public:
    virtual void display()
    {
        gc.clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        gc.frustum(1 , -1 , -1 , 1 , 1 , 10);

        gc.clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        gc.loadIdentity();
        gc.matrixMode(GL_MODELVIEW);

        float eyeX, eyeY, eyeZ;
        positioner->getEyePosition(eyeX, eyeY, eyeZ);
        gc.lookAt(eyeX, eyeY, eyeZ, 
            0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

        gc.clearColor(0.0, 0.0, 0.0, 1.0);
        gc.enable(GL_CULL_FACE); 
        gc.enable(GL_LIGHTING);

        OpenGLLight light(GL_LIGHT0);
        float lightX, lightY, lightZ;
        positioner->getLightPosition(lightX, lightY, lightZ);
        light.position(lightX, lightY, lightZ, 1.0f);

        float r, g, b;
        positioner->getColorPosition(r, g, b);
       
        OpenGLMaterial material(GL_FRONT);
        material.diffuse(r, g, b, 1.0f);
        material.specular(1.0f, 1.0f, 1.0f, 1.0f);
        material.shininess(100.0);

        sphere-> draw(1, 40, 40);
    }

    virtual void resize(int w, int h)
    {
       if (w == 0 || h == 0) {
          return;
       }
       gc.matrixMode(GL_PROJECTION);
       gc.loadIdentity();
       gc.perspective(16.0, (double)w / (double)h, 0.5, 40.0); 

       gc.matrixMode(GL_MODELVIEW);
    }


    virtual void initialize()
    {
      gc.enable(GL_DEPTH_TEST);

      quadric = new OpenGLQuadric();
      quadric -> drawStyle(GLU_FILL);
      quadric -> normals(GLU_SMOOTH);
      sphere = new OpenGLSphere(quadric);
    }

  public:
    SimpleView(OpenGLForm* parent, const char* name, Args& args)
    :OpenGLView(parent, name, args)
    ,positioner(NULL)
    {
    } 

    ~SimpleView()
    {
    }

    void setPositioner(ColorEyeLightPositioner* pos)
    {
      positioner = pos; //shallow copy.
    } 
  };
  //Inner class ends.
    
private:
  SmartPtr<SimpleView>  view;
  SmartPtr<OpenGLForm>  form;
  SmartPtr<ColorEyeLightPositioner> positioner;
 
  virtual void structureNotify(Event& event)
  {
    XEvent* xe = event.getXEvent();
    if (xe->type == ConfigureNotify) {
      configureNotify(event);
    } else {
      //Add here your own nofity event handlers.
    }
    //sendExposeEvent();
  }
  
  //Your own resize handler.
  virtual void configureNotify(Event& event)
  {
    configure();
  }

  virtual void configure()
  {
    Dimension width, height;
    get(XmNwidth, (XtArgVal)&width);
    get(XmNheight, (XtArgVal)&height);

    if (positioner && view) {
      Dimension w = width-positioner->getPositionerWidth()-4;

      view->set(XmNwidth, w);
      view->set(XmNheight, height);
      view->resize(w, height);
      positioner->resize((Position)(w-4), (Position)0,
                w+2, (Dimension)(height-2), (Dimension)0);
    }
  }

public:
  MainView(OpenGLApplication& applet, const char* name, Args& args)
  :OpenGLMainView(applet, name, args) 
  {
    Args ar;
    form  = new OpenGLForm(this, "", ar);
 
    ar.reset();
    ar.set(XmNtopAttachment,   XmATTACH_FORM);
    ar.set(XmNleftAttachment,  XmATTACH_FORM);
    ar.set(XmNbottomAttachment, XmATTACH_FORM);
    ar.set(XmNresizePolicy,     XmRESIZE_ANY);
    ar.set(XmNopenGLBufferType, (XtArgVal)getBufferType());
    view = new SimpleView(form, "", ar);

    ar.reset();
    ar.set(XmNtopAttachment,   XmATTACH_FORM);
    ar.set(XmNrightAttachment, XmATTACH_FORM);
    ar.set(XmNleftAttachment,  XmATTACH_WIDGET);
    ar.set(XmNbottomAttachment, XmATTACH_FORM);
    ar.set(XmNleftWidget, view->getWidget());
    positioner = new ColorEyeLightPositioner(form, "", ar);
     
    positioner->setColorPosition(255, 0, 128);
    positioner->setEyePosition(5, 0, 8);
    positioner->setLightPosition(-5, 0, 10);
    positioner->setExposeEventListener(view);

    view->setPositioner(positioner);

    this -> addEventHandler(StructureNotifyMask, this, 
         (Handler)&MainView::structureNotify, NULL);

    //Call configure layaout method. 
    configure();
  }

  ~MainView()
  {
  }
};

}

//
int main(int argc, char** argv) 
{
  try {
    const char*  appclass = argv[0];
    OpenGLApplication applet(appclass, argc, argv);

    Args args;
    args.set(XmNgeometry, "600x400");
    MainView view(applet, argv[0], args);
    view.realize();

    applet.run();
    
  } catch (Exception& ex) {
    ex.display();
  }
  return 0;
}




Last modified: 1 Jan 2017

 Last modified: 1 Jan 2017

Copyright (c) 2000-2017 Antillia.com ALL RIGHTS RESERVED.