VIZ++ Samples

1 Screenshot

2 Source code

/*
 * CubeRotationByKeyInput.cpp 
 * Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 */


#
#include <viz++/opengl/OpenGLMainView.h>
#include <viz++/opengl/OpenGLGC.h>

#include <viz++/opengl/OpenGLClientState.h>

#include "Resource.h"

namespace VIZ {

class MainView :public OpenGLMainView {

private:
  SmartPtr<OpenGLGC> gc;
  float     angle;
    
public:
  virtual void display()
  {
      static GLfloat vertices[] = {
      -0.5f, -0.5f,  0.5f,
       0.5f, -0.5f,  0.5f,
       0.5f,  0.5f,  0.5f,
      -0.5f,  0.5f,  0.5f,

      -0.5f, -0.5f, -0.5f,
       0.5f, -0.5f, -0.5f,
       0.5f,  0.5f, -0.5f,
      -0.5f,  0.5f, -0.5f,
      };
    
      //Colors(RGBAs) for the 5 vertices
      static GLfloat colors[] = { 
        1.0f, 0.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        0.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 1.0f,

        1.0f, 0.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        0.0f, 0.0f, 1.0f,
        1.0f, 1.0f, 1.0f,
      };
  
      //Indices for the 4 triangles.
      static GLint indices[] = { 
        0, 1, 2,  2, 3, 0,
        3, 2, 6,  6, 7, 3,
        7, 6, 5,  5, 4, 7,
        4, 5, 1,  1, 0, 4,
        4, 0, 3,  3, 7, 4,
        1, 5, 6,  6, 2, 1,
      };

      if (gc ) { 
    
        gc -> clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        gc -> loadIdentity();
        gc -> translate(0.0f,0.0f,-1.0f); 
        gc -> lookAt(2.0, 4.0, 6.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); 

        //Rotation around y-axis.
        gc -> rotate(angle, 0.0, 1.0, 0.0);
      
        try {        
          OpenGLClientState state1(GL_VERTEX_ARRAY); 
          OpenGLClientState state2(GL_COLOR_ARRAY);

          gc -> vertexPointer(3, GL_FLOAT, 0, vertices);
          gc -> colorPointer (4, GL_FLOAT, 0, colors);
                 
          gc -> drawElements(GL_TRIANGLES, CountOf(indices), GL_UNSIGNED_INT, indices);
      
        } catch (Exception& ex) {
          caught(ex); 
        }
    }
  }
 
  virtual void resize(int w, int h)
  {
    if (w == 0 || h == 0) {
        return;
    }
    if (gc) {
      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 = new OpenGLGC();

    gc -> matrixMode(GL_PROJECTION);
    gc -> clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    gc -> loadIdentity();
    gc -> matrixMode(GL_MODELVIEW);

    gc -> enable( GL_DEPTH_TEST );
    gc -> frustum(1 , -1 , -1 , 1 , 1 , 10);
    gc -> clearColor(0.0, 0.0, 1.0, 1.0);
  }


  //Define your own keyCallback method to handle a keyPress event.  
  virtual void keyCallback(int key, int scancode, int action, int mods) 
  {    
    switch (key) {
      case GLFW_KEY_LEFT:
        angle -= 2.0;
        postRenderRequest();
        break;
      case GLFW_KEY_RIGHT:
        angle += 2.0;
        postRenderRequest();
        break;
      default:
        break;
    }
  }
  
public:
  MainView(OpenGLApplet& applet, int width, int height, const char* name)
  :OpenGLMainView(applet, width, height, name)
  {
    angle = 4.0f;
    enableKeyCallback();
  }

  ~MainView()
  {
  }
};
}

//
int main(int argc, char** argv) 
{
  try {    
    ModuleFileName module;
    const char*  name = module.getAppName(); //program.exe
    OpenGLWaitableApplet applet(argc, argv);
    
    MainView view(applet, 400, 300, name);
    view.realize();

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