I hope that the solution is to modify this code to make it the same as required:

code:

#ifdef APPLE_CC

#include

#else

#include

#endif

//#include

GLsizei winWidth = 400, winHeight = 400; // Initial Display-window size.

GLfloat red = 1.0, green = 1.0, blue = 1.0; // Initial triangle color: white.

GLenum fillMode = GL_SMOOTH; // Initial polygon fill: color interpolation

void init(void)

{

glClearColor(0.6, 0.6, 0.6, 1.0); // Set display-window color to gray.

glMatrixMode(GL_PROJECTION);

gluOrtho2D(0.0, 300.0, 0.0, 300.0);

}

void fillOption(GLint selectedOption)

{

switch (selectedOption) {

case 1: fillMode = GL_FLAT; break; // Flat surface rendering.

case 2: fillMode = GL_SMOOTH; break; // Gouraud rendering.

}

glutPostRedisplay();

}

void displayTriangle(void)

{

glClear(GL_COLOR_BUFFER_BIT);

glShadeModel(fillMode); // Set fill method for triangle.

glColor3f(red, green, blue); // Set color for first two vertices.

glBegin(GL_TRIANGLES);

glVertex2i(280, 20);

glVertex2i(160, 280);

glColor3f(red, 0.0, 0.0); // Set color of last vertex to red.

glVertex2i(20, 100);

glEnd();

glFlush();

}

void reshapeFcn(GLint newWidth, GLint newHeight)

{

glViewport(0, 0, newWidth, newHeight);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluOrtho2D(0.0, GLfloat(newWidth), 0.0, GLfloat(newHeight));

displayTriangle();

glFlush();

}

int main(int argc, char **argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

glutInitWindowPosition(200, 200);

glutInitWindowSize(winWidth, winHeight);

glutCreateWindow("Menu Example");

init();

glutDisplayFunc(displayTriangle);

glutCreateMenu(fillOption); // Create pop-up menu.

glutAddMenuEntry("Solid-Color Fill", 1);

glutAddMenuEntry("Color-Interpolation Fill", 2);

/* Select a menu option using the right mouse button. */

glutAttachMenu(GLUT_RIGHT_BUTTON);

glutReshapeFunc(reshapeFcn);

glutMainLoop();

}

the required:

Bcler lio the imper below lo beiller indericatel. Whivt Malberw; if tantarier for whom