ПРИМЕР#10

Пример#10 Создание GUI используя GLUI, часть 2

#include <iostream>

#include <string>

#include "glut.h"

#include "glui.h"

using namespace std;

float    length = 5;

float    scale =1;

int      Lighting=1;

std::string text = "User interface collection";

#define max 10

#define min -max

#define drawOneLine(x1,y1,z1,x2,y2,z2) glBegin(GL_LINES); \

    glVertex3f(x1,y1,z1); glVertex3f (x2,y2,z2); glEnd();

int   obj = 2;

GLUI *glui;

GLUI_Rotation *sph_rot;

GLUI_RadioGroup *radio;

float cube_rotate[16] = { 1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1 };

float view_rotate[16] = { 1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1 };

float obj_pos[] = { 0.0, 0.0, 0.0 };

void init()

{

    glClearColor(0.0, 0.0, 0.0, 0.0);

    glDepthFunc(GL_LESS);

     GLfloat light0_ambient[] =  {0.1f, 0.1f, 0.3f, 1.0f};

  GLfloat light0_diffuse[] =  {.6f, .6f, 1.0f, 1.0f};

  GLfloat light0_position[] = {1.0f, 1.0f, 1.0f, 0.0f};

  glEnable(GL_LIGHTING);

  glEnable(GL_LIGHT0);

  glLightfv(GL_LIGHT0, GL_AMBIENT, light0_ambient);

  glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_diffuse);

  glLightfv(GL_LIGHT0, GL_POSITION, light0_position);

  //glEnable(GL_ALPHA_TEST);

  glEnable(GL_DEPTH_TEST);//объекты находятся в одном слое

  glEnable(GL_COLOR_MATERIAL);//цветной материал, иначе все ЧБ

  glMatrixMode(GL_PROJECTION);

  glLoadIdentity();

  glOrtho(min, max,  min, max,  min, max);

  gluLookAt(3, 1, 0, 0,0,0, 0,1,0);//from, to, vector

  glMatrixMode(GL_MODELVIEW);

}

void SysCooor(float length)

{

    glBegin(GL_LINES);

         glColor3f(1.0f, 0.0f, 0.0f);

         glVertex3f(0.0f, 0.0f, 0.0f);

         glVertex3f(length, 0.0f, 0.0f);

         glColor3f(0.0f, 1.0f, 0.0f);

         glVertex3f(0.0f, 0.0f, 0.0f);

         glVertex3f(0.0f, length, 0.0f);

         glColor3f(0.0f, 0.0f, 1.0f);

         glVertex3f(0.0f, 0.0f, 0.0f);

         glVertex3f(0.0f, 0.0f, length);

         glEnd();

         glEnable (GL_LINE_STIPPLE);

         glLineStipple (1.5, 0x00FF);

         glColor3f(1.0f, 0.0f, 0.0f);

         drawOneLine (0.0, 0.0, 0.0, -length, 0.0, 0.0);

         glColor3f(0.0f, 1.0f, 0.0f);

         drawOneLine (0.0, 0.0, 0.0, 0.0, -length, 0.0);

         glColor3f(0.0f, 0.0f, 1.0f);

         drawOneLine (0.0, 0.0, 0.0, 0.0, 0.0, -length);

         glLineWidth (1.0);

         glDisable (GL_LINE_STIPPLE);

}

void draw()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    if (Lighting==0) glDisable(GL_LIGHTING);

    else glEnable(GL_LIGHTING);

    glPushMatrix();

         glScalef(scale,scale,scale);

         glRotatef(-90,1,0,0);//+Z сверху c наклоном

         glRotatef(-45,0,0,1);//XY к пользователю

         glTranslatef( obj_pos[0], obj_pos[1], obj_pos[2] );

         glMultMatrixf( cube_rotate );

         SysCooor(length);

           glColor3ub( 255, 0, 0 );

           glRasterPos3f( 1, 1 ,8);

           for (unsigned int i=0; i<text.length(); ++i)

             glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, text[i] );

           if ( obj == 0 )  glutSolidSphere(2,16,16);  

             else if ( obj == 1 )  glutSolidIcosahedron();

    glPopMatrix();

    glutSwapBuffers();

    glutPostRedisplay();

    glFlush();

}

void control_cb( int control )

{

    for(int i=0;i<16;i++)

    cube_rotate[i]=0;//{ 1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1 };

    for(int i=0;i<16;i+=5)

    cube_rotate[i]=1;

}

void GUI()

{

    glui = GLUI_Master.create_glui_subwindow( 1, GLUI_SUBWINDOW_LEFT );

    (new GLUI_Spinner( glui, "Length:", &length ))->set_int_limits( 0, 10 );

    new GLUI_Separator( glui );

    (new GLUI_Spinner( glui, "Scale:", &scale ))->set_int_limits( 0, 5 );

    new GLUI_Separator( glui );

    GLUI_Panel *panelLight = new GLUI_Panel( glui, "", GLUI_PANEL_NONE );

    new GLUI_Checkbox( panelLight, "Light", &Lighting );

    GLUI_EditText   *edittext= new GLUI_EditText( glui, "Text:", text, -1);

    new GLUI_Button( glui, "Orientation=0", 0, control_cb);

    GLUI_Panel *obj_panel = new GLUI_Panel( glui, "Panel" );

     radio = new GLUI_RadioGroup( obj_panel,&obj,-1 );

     new GLUI_RadioButton( radio, "Sphere" );

     new GLUI_RadioButton( radio, "Icosahedron" );

     new GLUI_RadioButton( radio, "EMPTY" );

      GLUI_Rollout *Move = new GLUI_Rollout(glui, "Move", false );

     GLUI_Translation *trans_xy =

    new GLUI_Translation(Move, "Objects XY", GLUI_TRANSLATION_XY, obj_pos );

  trans_xy->set_speed( .1 );

    for(int i=0;i<5;i++)

    new GLUI_StaticText( glui, "" );

    sph_rot = new GLUI_Rotation(glui, "Rotate", cube_rotate );

    sph_rot->set_spin(1);

    sph_rot->set_h(50);

    sph_rot->set_w(50);

    for(int i=0;i<4;i++)

    new GLUI_StaticText( glui, "" );

    new GLUI_Button( glui, "QUIT", 0,(GLUI_Update_CB)exit );

}

void mouse(int button,int state,int x,int y)

{

    switch(button)

    {

    case GLUT_MIDDLE_BUTTON:

         exit(0);

    }

}

void main(int argc, char **argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA |GLUT_DEPTH);

    glutInitWindowPosition(150, 50);

    glutInitWindowSize(800,600);

    glutCreateWindow("user interface");

    GLUI_Master.set_glutSpecialFunc( NULL );

    init();

    glutDisplayFunc(draw);

    glutMouseFunc(mouse);

    GUI();

    glutMainLoop();

}

Для самостоятельной работы:

 1. Добавьте возможность изменять цвет объекта с помощью инструмента Spinner

 2. Добавьте возможность вращения объекта без вращения глобальных(мировых) осей координат