ada banyak rasa saat coding. ada keringat dan air mata dalam mencoding. keringat saat kau berusaha menyelami makna dalam setiap ilmu coding. dan air mata disaat tiada orang yang dapat membantumu, ketika program dalam keaadaan bugging. apapun rasa dalam mencoding. cobalah untuk mengerjakan sendiri. sampai kau bisa. dan benar-benar bisa.

Tuesday 24 February 2015

Tiling a Pattern in OpenGL

Hai sobat coding  :)
setelah sebelumnya kita telah belajar membuat objek 2D sederhana dengan OpenGL pada Membuat robot 2D - OpenGL, sekarang kita akan belajar teknik tilling.
Contohnya seperti gambar dibawah ini :
Jadi pertama kita membuat bentuk dasar (bassic) dari sebuah pattern tersebut. kemudian gunakan teknik tiling dengan menggunakan looping sehingga terbentuklah kain batik seperti dibawah ini


Berikut adalah source codenya :

#include<GL/glut.h>
#include <Math.h>     // Needed for sin, cos
#define PI 3.14159265f

GLfloat ballRadius = 0.02f;   // radius
int triangles = 100; //jumlah segitiga yg digunakan untuk menggambar circle
GLfloat angle;

void init()
{
 glClearColor(0.23, 0.37, 0.80, 1.0); // set background jadi warna putih
 glColor3f(1.0, 1.0, 1.0);
 glMatrixMode(GL_PROJECTION);
 glLoadIdentity();
 glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
}

void myDisplay()
{
 //glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
 //----------------------------------------------------------------------------------------------
 //daun
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-0.10, 0.30);
   glVertex2f(-0.15, 0.60);
   glVertex2f(0.00, 0.75);
   glVertex2f(0.15, 0.60);
   glVertex2f(0.10, 0.30);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-0.10, -0.30);
   glVertex2f(-0.15, -0.60);
   glVertex2f(0.00, -0.75);
   glVertex2f(0.15, -0.60);
   glVertex2f(0.10, -0.30);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-0.10, 0.20);
   glVertex2f(-0.30, 0.50);
   glVertex2f(-0.50, 0.50);
   glVertex2f(-0.50, 0.30);
   glVertex2f(-0.20, 0.10);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(0.10, 0.20);
   glVertex2f(0.30, 0.50);
   glVertex2f(0.50, 0.50);
   glVertex2f(0.50, 0.30);
   glVertex2f(0.20, 0.10);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-0.10, -0.20);
   glVertex2f(-0.30, -0.50);
   glVertex2f(-0.50, -0.50);
   glVertex2f(-0.50,-0.30);
   glVertex2f(-0.20, -0.10);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(0.10, -0.20);
   glVertex2f(0.30, -0.50);
   glVertex2f(0.50, -0.50);
   glVertex2f(0.50, -0.30);
   glVertex2f(0.20, -0.10);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-0.75, -0.00);
   glVertex2f(-0.60, 0.15);
   glVertex2f(-0.35, 0.10);
   glVertex2f(-0.35, -0.10);
   glVertex2f(-0.60, -0.15);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(0.75, -0.00);
   glVertex2f(0.60, 0.15);
   glVertex2f(0.35, 0.10);
   glVertex2f(0.35, -0.10);
   glVertex2f(0.60, -0.15);
   glEnd();
 //--------------------------------------------------------------------------------------------------
 //circle
 glBegin(GL_TRIANGLE_FAN);
    glColor3f(0.90, 0.90, 1.00);//make the color lavender
    glVertex2f(0.0, 0.0);       // Center of circle

    for (int i = 0; i <= triangles; i++)
    { // Last vertex same as first vertex
    angle = i * 2.0f * PI / triangles;  // 360 deg for all segments
    glVertex2f(cos(angle) * 0.4, sin(angle) * 0.4);
    }
    glEnd();
 //--------------------------------------------------------------------------------------------------
 //atas
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.10, -0.10);
   glVertex2f(0.00, -0.35);
   glVertex2f(0.10, -0.10);
   glEnd();
 //bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.10, 0.10);
   glVertex2f(0.00, 0.35);
   glVertex2f(0.10, 0.10);
   glEnd();
  glBegin(GL_TRIANGLES);
 //kanan
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.10, 0.10);
   glVertex2f(0.35, 0.00);
   glVertex2f(0.10, -0.10);
   glEnd();
 //kiri
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.10, 0.10);
   glVertex2f(-0.35, 0.00);
   glVertex2f(-0.10, -0.10);
   glEnd();
 //kanan atas 
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.00, 0.15);
   glVertex2f(0.25, 0.25);
   glVertex2f(0.15, 0.00);
   glEnd();
 //kanan bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.00, -0.15);
   glVertex2f(0.25, -0.25);
   glVertex2f(0.15, 0.00);
   glEnd();
 //kiri bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.00, -0.15);
   glVertex2f(-0.25, -0.25);
   glVertex2f(-0.15, 0.00);
   glEnd();
 //kiri atas 
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.00, 0.15);
   glVertex2f(-0.25, 0.25);
   glVertex2f(-0.15, 0.00);
   glEnd();
 //kotak
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.15, 0.15);
   glVertex2f(0.15, 0.15);
   glVertex2f(0.15, -0.15);
   glVertex2f(-0.15, -0.15);
   glEnd();
 //---------------------------------------------------------------------------------------------------
 //circle
 glBegin(GL_TRIANGLE_FAN);
    glColor3f(1.0, 1.0, 1.0);//make the color white
    glVertex2f(0.0, 0.0);       // Center of circle

    for (int i = 0; i <= triangles; i++)
    { // Last vertex same as first vertex
    angle = i * 2.0f * PI / triangles;  // 360 deg for all segments
    glVertex2f(cos(angle) * ballRadius, sin(angle) * ballRadius);
    }
    glEnd();
 //------------------------------------------------------------------------------------------------------
   //..pojok kanan atas
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(0.20, 1.00);
   glVertex2f(0.30, 0.85);
   glVertex2f(0.65, 0.92);
   glVertex2f(0.65, 1.00);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(1.00, 0.20);
   glVertex2f(0.82, 0.30);
   glVertex2f(0.95, 0.80);
   glVertex2f(1.00, 0.80);
   glEnd();
   //..pojok kiri atas
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-0.20, 1.00);
   glVertex2f(-0.30, 0.85);
   glVertex2f(-0.65, 0.92);
   glVertex2f(-0.65, 1.00);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-1.00, 0.20);
   glVertex2f(-0.82, 0.30);
   glVertex2f(-0.95, 0.80);
   glVertex2f(-1.00, 0.80);
   glEnd();
  //..pojok kiri bawah
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-0.20, -1.00);
   glVertex2f(-0.30, -0.85);
   glVertex2f(-0.65, -0.92);
   glVertex2f(-0.65, -1.00);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-1.00, -0.20);
   glVertex2f(-0.82, -0.30);
   glVertex2f(-0.95, -0.80);
   glVertex2f(-1.00, -0.80);
   glEnd();
  //..pojok kanan bawah
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(0.20, -1.00);
   glVertex2f(0.30, -0.85);
   glVertex2f(0.65, -0.92);
   glVertex2f(0.65, -1.00);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(1.00, -0.20);
   glVertex2f(0.82, -0.30);
   glVertex2f(0.95, -0.80);
   glVertex2f(1.00, -0.80);
   glEnd();
 //------------------------------------------------------------------------------------------------------   
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(1.00, 1.00);
   glVertex2f(0.65, 1.00);
   glVertex2f(0.65, 0.65);
   glVertex2f(1.00, 0.65);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-1.00, 1.00);
   glVertex2f(-0.65, 1.00);
   glVertex2f(-0.65, 0.65);
   glVertex2f(-1.00, 0.65);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(-1.00, -1.00);
   glVertex2f(-0.65, -1.00);
   glVertex2f(-0.65, -0.65);
   glVertex2f(-1.00, -0.65);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.90, 0.90, 1.00);//make the color lavender
   glVertex2f(1.00, -1.00);
   glVertex2f(0.65, -1.00);
   glVertex2f(0.65, -0.65);
   glVertex2f(1.00, -0.65);
   glEnd();
 //------------------------------------------------------------------------------------------------------
    //..pojok kiri atas
 //kanan
    glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-1.00, 0.80);
   glVertex2f(-0.60, 1.00);
   glVertex2f(-1.00, 1.00);
   glEnd();   
 //kanan bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.82, 1.00);
   glVertex2f(-0.70, 0.70);
   glVertex2f(-1.00, 0.82);
   glEnd();  
 //bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-1.00, 0.60);
   glVertex2f(-0.80, 1.00);
   glVertex2f(-1.00, 1.00);
   glEnd();
 //..pojok kiri bawah
 //kanan
    glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-1.00, -0.80);
   glVertex2f(-0.60, -1.00);
   glVertex2f(-1.00, -1.00);
   glEnd();   
 //kanan bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.82, -1.00);
   glVertex2f(-0.70, -0.70);
   glVertex2f(-1.00, -0.82);
   glEnd();  
 //bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-1.00, -0.60);
   glVertex2f(-0.80, -1.00);
   glVertex2f(-1.00, -1.00);
   glEnd();
 //..pojok kanan bawah
 //kanan
    glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(1.00, -0.80);
   glVertex2f(0.60, -1.00);
   glVertex2f(1.00, -1.00);
   glEnd();   
 //kanan bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.82, -1.00);
   glVertex2f(0.70, -0.70);
   glVertex2f(1.00, -0.82);
   glEnd();  
 //bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(1.00, -0.60);
   glVertex2f(0.80, -1.00);
   glVertex2f(1.00, -1.00);
   glEnd();
 //..pojok kanan atas
 //kanan
    glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(1.00, 0.80);
   glVertex2f(0.60, 1.00);
   glVertex2f(1.00, 1.00);
   glEnd();   
 //kanan bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.82, 1.00);
   glVertex2f(0.70, 0.70);
   glVertex2f(1.00, 0.82);
   glEnd();  
 //bawah
  glBegin(GL_TRIANGLES);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(1.00, 0.60);
   glVertex2f(0.80, 1.00);
   glVertex2f(1.00, 1.00);
   glEnd();
 //----------------------------------------------------------------------------------------------------
   //..atas
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.10, 0.60);
   glVertex2f(0.00, 0.70);
   glVertex2f(0.10, 0.60);
   glVertex2f(0.05, 0.45);
   glVertex2f(-0.05, 0.45);
   glEnd();
 //..bawah
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.10, -0.60);
   glVertex2f(0.00, -0.70);
   glVertex2f(0.10, -0.60);
   glVertex2f(0.05, -0.45);
   glVertex2f(-0.05, -0.45);
   glEnd();
 //..kiri
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.70, 0.00);
   glVertex2f(-0.60, 0.10);
   glVertex2f(-0.40, 0.05);
   glVertex2f(-0.40, -0.05);
   glVertex2f(-0.60, -0.10);
   glEnd();
 //..kanan
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.70, 0.00);
   glVertex2f(0.60, 0.10);
   glVertex2f(0.40, 0.05);
   glVertex2f(0.40, -0.05);
   glVertex2f(0.60, -0.10);
   glEnd();
 //..kiri atas
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.45, 0.35);
   glVertex2f(-0.45, 0.45);
   glVertex2f(-0.35, 0.45);
   glVertex2f(-0.27, 0.32);
   glVertex2f(-0.32, 0.26);
   glEnd();
 //..kanan atas
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.45, 0.35);
   glVertex2f(0.45, 0.45);
   glVertex2f(0.35, 0.45);
   glVertex2f(0.27, 0.32);
   glVertex2f(0.32, 0.26);
   glEnd();
 //..kiri bawah
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.45, -0.35);
   glVertex2f(-0.45, -0.45);
   glVertex2f(-0.35, -0.45);
   glVertex2f(-0.27, -0.32);
   glVertex2f(-0.32, -0.26);
   glEnd();
 //..kanan bawah
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.45, -0.35);
   glVertex2f(0.45, -0.45);
   glVertex2f(0.35, -0.45);
   glVertex2f(0.27, -0.32);
   glVertex2f(0.32, -0.26);
   glEnd();
 //---------------------------------------------------------------------------------------------
 //..pojok kanan atas
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.97, 0.50);
   glVertex2f(1.00, 0.50);
   glVertex2f(1.00, 0.25);
   glVertex2f(0.93, 0.30);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.25, 1.00);
   glVertex2f(0.32, 0.92);
   glVertex2f(0.50, 0.97);
   glVertex2f(0.50, 1.00);
   glEnd();
 //..pojok kiri atas
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.97, 0.50);
   glVertex2f(-1.00, 0.50);
   glVertex2f(-1.00, 0.25);
   glVertex2f(-0.93, 0.30);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.25, 1.00);
   glVertex2f(-0.32, 0.92);
   glVertex2f(-0.50, 0.97);
   glVertex2f(-0.50, 1.00);
   glEnd();
 //..pojok kanan bawah
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.97, -0.50);
   glVertex2f(1.00, -0.50);
   glVertex2f(1.00, -0.25);
   glVertex2f(0.93, -0.30);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(0.25, -1.00);
   glVertex2f(0.32, -0.92);
   glVertex2f(0.50, -0.97);
   glVertex2f(0.50, -1.00);
   glEnd();
 //..pojok kiri bawah
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.97, -0.50);
   glVertex2f(-1.00, -0.50);
   glVertex2f(-1.00, -0.25);
   glVertex2f(-0.93, -0.30);
   glEnd();
 glBegin(GL_POLYGON);
  glColor3f(0.00, 0.00, 0.00);//make the color black
   glVertex2f(-0.25, -1.00);
   glVertex2f(-0.32, -0.92);
   glVertex2f(-0.50, -0.97);
   glVertex2f(-0.50, -1.00);
   glEnd();
  glFlush();
}

void drawTiling()
{
 glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
 for (int i=0; i < 5; i++)
  for (int j=0; j<5; j++)
  {
   glViewport(i*120, j*120, 120, 120); // viewport berukuran 120 x 120
   
   myDisplay();
  }
}
int main(int argc, char** argv)
{
 glutInit(&argc, argv);
 glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
 glutInitWindowSize(600,600);
 glutInitWindowPosition(350,100);
 glutCreateWindow("Batik Ibu_5111100201_Ika Ayu Rahmania Islam");
 glutDisplayFunc(drawTiling);
 //glutDisplayFunc(myDisplay);
 init();
 glutMainLoop();

}
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