Tutorial Intermediate - How To Create A 2-Dimension Object (Butterfly)

What Will I Learn?

• You will learn how to create a 2 dimensional object
• You will learn about C ++ programming language
• You will learn about basic 2 dimensions

Requirements

• You need high confidence
• You need basic about C ++ programming language
• You need the ability to create an object
• You need a basic 2D object

Difficulty

• Intermediate

Tutorial Contents

Hello friends all, at this time I will give tutorial to my friends all how to make a 2 dimensional object and application that i use is microsoft visual because this app is quite easy in using you can download the application Here, As we know together that every day we see objects in the form of 2 dimensions for example when you see tv on cartoon animation show and this time I will give the object is a butterfly and if you want to make it you can follow the steps below:

• You can write the syntax below on the screen that has been created on the microsoft visual page and every syntax is explained in this tutorial:

The above command is to declare the header used C ++. It is a function for input and output operations.

#include <stdio.h>

The above command is a functions used for mathematical operations.

#include <stdlib.h>

The command to implement 2D transformation in the program is 2D Data Matrix structure.

#include <math.h>

To perform mathematical calculations

#include <GL/glut.h>

Command to declare the 2D object that will occur on plot X and plot Y

typedef struct
{
float x,y;
}
point2D_t;

Command to declare the color that occurs that is red, green, blue.

typedef struct
{
float r,g,b;
}
color_t;

Command to call the above function

void userdraw(void);

Command to draw the number of dots created on each plot

void drawPolygon(point2D_t pnt[],int n)
{
int i;
glBegin(GL_LINE_LOOP);

Command to drag the created point

    for(i=0;i<n;i++)
    {
        glVertex2f(pnt[i].x,pnt[i].y);
    }
    glEnd();

}

Command to declare color in the form of float

void setColor(float red,float green,float blue)
{
glColor3f(red,green,blue);
}

Command to declare color on point

void setColor(color_t col)
{
glColor3f(col.r,col.g,col.b);
}

Command to fill a point on the line

void fillPolygon(point2D_t pnt[],int n,color_t color)
{
int i;
setColor(color);
glBegin(GL_POLYGON);
for(i=0;i<n;i++)
{
glVertex2f(pnt[i].x,pnt[i].y);
}
glEnd();
}

This function is used to color a polygon with colors that are graded from a color of other colors.

void gradatePolygon(point2D_t pnt[],int n,color_t color[])
{
int i;
glBegin(GL_POLYGON);
for (i=0;i<n;i++)
{
setColor(color[i]);
glVertex2f(pnt[i].x,pnt[i].y);
}
}

Command to draw a line that will be made in the subject then will be done looping at each point to be connected so that the creation of a very small point so as to form like a straight line length

void userdraw(void)
{
point2D_t shape[360];
double srad,r ;
for(int s=0;s<360;s++)
{
srad=s * 3.14/180;
r=sin(2srad);
shape[s].x=(float)(rcos(srad));
shape[s].y=(float)(r*sin(srad));
}
color_t biru={0.,1.,1.};
fillPolygon(shape,360,biru);
setColor(0.,1.,1.);
drawPolygon(shape,360);
}

command for polygon and polyline declarations

void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
userdraw();
glFlush();
}

Command to create a border on your laptop page as well as cover the already declared syntax

void main (int argc,char **argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(640,480);
glutInitWindowPosition(100,150);
glutCreateWindow("kupu-kupu");
glClearColor(1.0,1.0,1.0,0.0);
gluOrtho2D(-200.,-200.,200.,200.);
glutDisplayFunc(display);
glutMainLoop();
}

• After we follow the steps above then we will get result like picture below:

• All The Syntax Can Be Downloaded On Google Drive
  Download

Curriculum

• Tutorial Intermediate - How To Create A 3-Dimensional Object (Cube)
• Tutorial Basic - How To Backup Database Using Navicat in (.Sql)

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