Membuat garis DIAGONAL, VERTIKAL, HORIZONTAL Dengan C++

Membuat garis

DIAGONAL, VERTIKAL, HORIZONTAL

Dengan opengl pada C++

#include <windows.h>

#include <iostream.h>

#include <gl/gl.h>

#include <stdio.h>

#include <gl\glu.h>

#include <gl\glaux.h>

#include <gl\glut.h>

void sumbu(){

glPushMatrix();

glBegin(GL_LINES);                      

glVertex3f(0,0,0.0);

glVertex3f(0,1,0.0);

glVertex3f(0,0,0.0);

glVertex3f(1,0,0.0);

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0,1.0,1.0);

glPopMatrix();

glEnd();

glFlush();

}

void Diagonal()

{

float a,b,c,d;

cout<<"Masukkan Xo :";

cin>>a;cout<<"Masukkan Yo :";

cin>>b;cout<<"Masukkan X1 :";

cin>>c;cout<<"Masukkan Y1 :";

cin>>d;

glPushMatrix();

glBegin(GL_LINES);

glVertex3f(a+0.5,b+0.5,0.0);

glVertex3f(c+0.5,d+0.5,0.0);

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0,1.0,1.0);

glPopMatrix();

glEnd();

glFlush();

}

Pada garis diagonal semua korrdinat berubah karena yang ingin diambil adalah garis miring.

void Horizontal()

{

float e,f,g;

cout<<"Masukkan X Awal:";cin>>e;

cout<<"Masukkan X Akhir:";cin>>f;

cout<<"Masukkan Y tetap:";cin>>g;

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0,1.0,1.0);

glBegin(GL_LINES);

glVertex3f(e+0.1,g+0.1,0.0);

glVertex3f(f+0.1,g+0.1,0.0);

glEnd();

glFlush();

}

Pada garis horizontal koordinat y tetap, dan koordinat x berubah, maka akan terbuatlah garis miring

void Vertikal()

{

float x,y,z;

cout<<"Masukkan Yawal :";cin>>x;

cout<<"Masukkan Yakhir:";cin>>y;

cout<<"Masukkan Xtetap:";cin>>z;

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0,1.0,1.0);

glBegin(GL_LINES);

glVertex3f(z+0.5,x+0.5,0.0);

glVertex3f(z+0.5,y+0.5,0.0);

glEnd();

glFlush();

}

Pada garis vertical koordinat x tetap, dan y yang berubah sesuai dengan titik awal sampai titik y akhir. Maka akan terbuatlah garis lurus

void initialize()

{

glClearColor(0.0,0.0,0.0,0.0);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

glOrtho(0.0,1.0,0.0,1.0,-1.0,1.0);

}

int main(int iArgc,char** cppArgv) {

menu:

int j;

cout<<"-----MENU----\n";

cout<<"1.Garis vertikal\n";

cout<<"2.Garis Horizontal\n";

cout<<"3.Garis Diagonal\n";

cout<<"4.Exit\n";

cout<<"------------------\n";

cout<<"Masukkan pilihan anda:";cin>>j;

cout<<"\n";

glutInit(&iArgc, cppArgv);

glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

glutInitWindowSize(500,500);

glutInitWindowPosition(600,200);

glutCreateWindow("OpenGL with C++");

initialize();

while (j<=4){

switch(j){

case 1:

glutDisplayFunc(Vertikal);

glutMainLoop();

return 0;

case 2:

glutDisplayFunc(Horizontal);

glutMainLoop();

return 0;

case 3:

glutDisplayFunc(Diagonal);

glutMainLoop();

return 0;

default:

cout<<"anda salah memasukkan";

goto menu;

}

}}