void drawScene()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Reset transformations
glLoadIdentity();
// look at the origin spot (0,0,0) from camera position, moved by mouse
gluLookAt( startX+deltaX, startY+deltaY, startZ+deltaZ, //camera pos
0.0, 0.0, 0.0, //looking at
0.0, 1.0, 0.0); //up orientation
// draw model elements (stars and planet)
drawStar(&universe);
drawStar(&sun);
drawPlanet(&p1);
drawPlanet(&p2);
drawPlanet(&p3);
drawPlanet(&p4);
drawPlanet(&p5);
drawPlanet(&p6);
drawPlanet(&p7);
drawPlanet(&p8);
// draw time
char time[10000];
int int_hours = (int)(hours);
int int_days = int_hours/24;
int int_years = int_days/365;
sprintf(time, "Time:\tY-%d\tD-%d\tH-%d", int_years, int_days%365, int_hours%24);
draw2DText(1.0,GLUT_WINDOW_HEIGHT*1.89, time);
// draw legend
char legend[10000];
sprintf(legend, "\"ESC\" for exit, \"t\" for planet label, \"s\" for step animation, \"r\" for running animation, Mouse moves camera (wheel or ctrl | shift | alt for zoom) ");
draw2DText(1.0, 1.0, legend);
glFlush();
glutSwapBuffers();
}
void GLWidget::drawCoordinateCross(void)
{
GLint viewport[4];
glMatrixMode (GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glMatrixMode (GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glGetIntegerv (GL_VIEWPORT, viewport);
glTranslatef (-1, -1, 0.0);
glScalef (40.0 / viewport[2], 40.0 / viewport[3], 1);
glTranslatef (1.25, 1.25, 0.0);
glRotatef(xRot / 16.0, 1.0, 0.0, 0.0);
glRotatef(yRot / 16.0, 0.0, 1.0, 0.0);
glRotatef(zRot / 16.0, 0.0, 0.0, 1.0);
glEnable (GL_COLOR_MATERIAL);
glDisable (GL_LIGHTING);
glLineWidth (1.0f);
glBegin(GL_LINES);
glColor3f(1,0,0);
glVertex3f (0.0f, 0.0f, 0.0f);
glVertex3f (0.9, 0.0f, 0.0f);
glColor3f(0,1,0);
glVertex3f (0.0f, 0.0f, 0.0f);
glVertex3f (0.0f, 0.9, 0.0f);
glColor3f(0,0,1);
glVertex3f (0.0f, 0.0f, 0.0f);
glVertex3f (0.0f, 0.0f, 0.9);
glEnd ();
glColor3f(1,0,0);
glPushMatrix();
glTranslatef(0.5,0,0);
glRotatef(90,0,1,0);
gluCylinder(row,0.1,0,0.4,10,10);
glPopMatrix();
glColor3f(0,1,0);
glPushMatrix();
glTranslatef(0,0.5,0);
glRotatef(-90,1,0,0);
gluCylinder(row,0.1,0,0.4,10,10);
glPopMatrix();
glColor3f(0,0,1);
glPushMatrix();
glTranslatef(0,0,0.5);
gluCylinder(row,0.1,0,0.4,10,10);
glPopMatrix();
glColor3f(1,0,0);
draw2DText(1.1, 0.0, 0.0, (char*)"X");
glColor3f(0,1,0);
draw2DText(0.1, 1.0, 0.0, (char*)"Y");
glColor3f(0,0,1);
draw2DText(0.1, 0.0, 1.0, (char*)"Z");
glEnable(GL_LIGHTING);
glDisable (GL_COLOR_MATERIAL);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
