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Design Ludo Board Using Computer Graphics

  • Last Updated : 19 Jul, 2021

In Turbo C graphics the graphics.h functions are used to draw different shapes like circles, rectangles, etc, display text(any message) in a different format (different fonts and colors). By using graphics.h we can make programs, animations and also games. These can be useful for beginners.

Function Used:

  • rectangle(l, t, r, b): A function from graphics.h header file which draws a rectangle from left(l) to right(r) and from top(t) to bottom(b).
  • line(a1, b1, a2, b2): A function from graphics.h header file which draws a line from (a1, b1) point to (a2, b2) point.
  • circle( a, b, r): A function from graphics.h header file which draws a circle with (a, b) as the center and r as the radius.
  • outtextxy(int x, int y, char *string): A function from graphics.h header file by which we can print any statements where, x, y are the coordinates of the point and, the third argument contains the address of the string to be displayed.
  • settextstyle(int font, int direction, int font_size): A function from graphics.h header file by which we can make a style of the printable text where the font argument specifies the font of the text. The direction can be HORIZ_DIR (Left to right) or VERT_DIR (Bottom to top).
  • setfillstyle(pattern, color): A function from graphics.h header file by which we can give a pattern of drawing and also a specific color.
  • floodfill(a, b, c): A function from graphics.h header file by which we can color a specific bounded area with (a, b) as the center and c as the border color.

Approach:

  • In this program, nine functions are defined:
    • red_corner()
    • blue_corner()
    • green_corner()
    • yellow_corner()
    • home()
    • line_red_blue()
    • line_green_yellow()
    • line_red_green()
    • line_yellow_blue()
  • The first step is to set the background color dark-gray by using the setfillstyle() and the floodfill() function.
  • Make two rectangles using the rectangle() function. Between them, one will act as the outer outline and another is the inner outline. Fill the color black in the space between the outer and inner outline.
  • The red_corner() function is called. Two rectangles are defined using the rectangle() function. Between them, one is the outer and another is an inner rectangle. The space between the outer rectangle is colored with red and the space between the inner rectangle is colored with white. Four circles are created using the circle() function and all the circles will be colored red. All the coloring will be implemented by using the setfillstyle() and the floodfill() functions.
  • Next step is to call blue_corner(), green_corner(), yellow_corner() functions sequentially.
  • The same thing has to be done in blue_corner(), green_corner(), yellow_corner() functions. But in the blue_corner() function the color blue is used, in the green_corner() function the color green is used, and in the yellow_corner() function the color yellow is used. The colors are filled by using setfillstyle() and floodfill() functions.
  • The next step is to call the home() function. In this function, two rectangles are implemented using the rectangle() function. Among them, one is the outer rectangle and another is the inner rectangle. The inner rectangle is colored black. There HOME is printed using the outtextxy(), settextstyle().
  • Call the line_red_blue() function. This function will draw the lines using the line() function. The space between the red and blue corners is divided into the same distanced line. Here a while loop will be implemented to draw the lines easily. Also, in this while loop, the code to color red will be implemented in the middle of that space. Also, a starting point needs to be created using a red color and a circle using the circle() function which is colored white. A Star Point was created which is also found on the real Ludo board. This is also implemented by the circle() function and color it White. In this function, decoration is done in the Home space by using red color. All the color is implemented by setfillstyle() and floodfill() functions.
  • Call line_green_yellow(), line_red_green(), line_yellow_blue() sequentially.
  • The same thing needs to be done in line_green_yellow(), line_red_green(), line_yellow_blue() functions. But in line_yellow_blue() the color blue is used, in line_red_green() the color green is used and in line_green_yellow() the color yellow is used. The colors are filled using setfillstyle() and floodfill() functions.

Below is the C program to implement the above approach:

C




// C program to implement
// the above approach
#include <conio.h>
#include <graphics.h>
#include <stdio.h>
  
// Declaring Function used
// in this program
void red_corner();
void blue_corner();
void green_corner();
void yellow_corner();
void home();
void line_red_blue();
void line_green_yellow();
void line_red_green();
void line_yellow_blue();
  
// Driver Code
void main()
{
    int gd = DETECT, gm;
  
    // Initialize of gdriver with
    // DETECT macros
    initgraph(&gd, &gm, "C:\\turboc3\\bgi");
  
    // Set Background Color
    setfillstyle(SOLID_FILL, DARKGRAY);
    floodfill(5, 5, 15);
  
    // Main Outer Outline
    rectangle(500, 200, 1250, 950);
  
    // Main Inner Outline
    rectangle(480, 180, 1270, 970);
  
    // Coloring The Middle Space
    setfillstyle(SOLID_FILL, BLACK);
    floodfill(485, 185, 15);
  
    // Calling red_corner() Function
    red_corner();
  
    // Calling blue_corner() Function
    blue_corner();
  
    // Calling green_corner() Function
    green_corner();
  
    // Calling yellow_corner() Function
    yellow_corner();
  
    // Calling home() Function
    home();
  
    // Calling line_red_blue() Function
    line_red_blue();
  
    // Calling line_green_yellow() Function
    line_green_yellow();
  
    // Calling line_red_green() Function
    line_red_green();
  
    // Calling line_yellow_blue() Function
    line_yellow_blue();
  
    // Holding The Screen For A While
    getch();
  
    // Close the initialized gdriver
    closegraph();
}
  
void line_yellow_blue()
{
    int x = 950;
  
    // Vertical Divisions
    line(950, 600, 1250, 600);
    line(950, 550, 1250, 550);
  
    // Loop fpr creating horizontal
    // line and coloring
    while (x < 1250) {
        line(x, 500, x, 650);
        setfillstyle(SOLID_FILL, BLUE);
        floodfill(x + 2, 555, 15);
        x = x + 50;
    }
  
    setfillstyle(SOLID_FILL, DARKGRAY);
    floodfill(1240, 555, 15);
  
    // Start Point
    setfillstyle(SOLID_FILL, BLUE);
    floodfill(1195, 605, 15);
    circle(1175, 625, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(1180, 630, 15);
  
    // Star Point
    circle(1125, 525, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(1130, 530, 15);
  
    // Home Decoration
    line(950, 650, 910, 600);
    line(950, 500, 910, 550);
    setfillstyle(SOLID_FILL, BLUE);
    floodfill(925, 575, 15);
}
  
void line_red_green()
{
    int x = 500;
  
    // Vertical Divisions
    line(500, 600, 800, 600);
    line(500, 550, 800, 550);
  
    // Loop for creating horizontal
    // line and coloring
    while (x < 800) {
        line(x, 500, x, 650);
        setfillstyle(SOLID_FILL, GREEN);
        floodfill(x + 2, 555, 15);
        x = x + 50;
    }
  
    setfillstyle(SOLID_FILL, DARKGRAY);
    floodfill(505, 555, 15);
  
    // Start Point
    setfillstyle(SOLID_FILL, GREEN);
    floodfill(555, 505, 15);
    circle(575, 525, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(580, 530, 15);
  
    // Star Point
    circle(625, 625, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(630, 630, 15);
  
    // Home Decoration
    line(800, 500, 840, 550);
    line(800, 650, 840, 600);
    setfillstyle(SOLID_FILL, GREEN);
    floodfill(810, 575, 15);
}
  
void line_red_blue()
{
    int x = 650;
  
    // Vertical Divisions
    line(850, 650, 850, 950);
    line(900, 650, 900, 950);
  
    // Loop for creating horizontal
    // line and coloring
    while (x <= 900) {
        line(800, x, 950, x);
        setfillstyle(SOLID_FILL, RED);
        floodfill(855, x + 2, 15);
        x = x + 50;
    }
  
    setfillstyle(SOLID_FILL, DARKGRAY);
    floodfill(855, 940, 15);
  
    // Start point
    setfillstyle(SOLID_FILL, RED);
    floodfill(805, 895, 15);
    circle(825, 875, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(830, 880, 15);
  
    // Star Point
    circle(925, 825, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(930, 830, 15);
  
    // Home Decoration
    line(800, 650, 840, 600);
    line(950, 650, 910, 600);
    setfillstyle(SOLID_FILL, RED);
    floodfill(885, 615, 15);
}
  
void line_green_yellow()
{
    int x = 200;
  
    // Vertical Divisions
    line(850, 200, 850, 500);
    line(900, 200, 900, 500);
  
    // Loop for creating horizontal
    // line and coloring
    while (x < 500) {
        line(800, x, 950, x);
        setfillstyle(SOLID_FILL, YELLOW);
        floodfill(855, x + 2, 15);
        x = x + 50;
    }
  
    setfillstyle(SOLID_FILL, DARKGRAY);
    floodfill(855, 205, 15);
  
    // Start Point
    setfillstyle(SOLID_FILL, YELLOW);
    floodfill(905, 255, 15);
    circle(925, 275, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(930, 280, 15);
    // Star Point
    circle(825, 325, 10);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(830, 330, 15);
  
    // Home Decoration
    line(800, 500, 840, 550);
    line(950, 500, 910, 550);
    setfillstyle(SOLID_FILL, YELLOW);
    floodfill(885, 545, 15);
}
  
void red_corner()
{
    // Outer Line
    rectangle(500, 650, 800, 950);
  
    // Inner Line
    rectangle(550, 700, 750, 900);
  
    // Circles
    circle(600, 750, 30);
    circle(700, 750, 30);
    circle(600, 850, 30);
    circle(700, 850, 30);
    setfillstyle(SOLID_FILL, RED);
  
    // Rectangle Red
    floodfill(505, 655, 15);
  
    // Circle Red
    floodfill(615, 765, 15);
    floodfill(715, 765, 15);
    floodfill(615, 865, 15);
    floodfill(715, 865, 15);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(555, 705, 15);
}
  
void blue_corner()
{
    // Outer Line
    rectangle(950, 650, 1250, 950);
  
    // Inner Line
    rectangle(1000, 700, 1200, 900);
  
    // Circles
    circle(1050, 750, 30);
    circle(1150, 750, 30);
    circle(1050, 850, 30);
    circle(1150, 850, 30);
    setfillstyle(SOLID_FILL, BLUE);
  
    // Rectangle Blue
    floodfill(955, 655, 15);
  
    // Circle Blue
    floodfill(1065, 765, 15);
    floodfill(1165, 765, 15);
    floodfill(1065, 865, 15);
    floodfill(1165, 865, 15);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(1005, 705, 15);
}
  
void green_corner()
{
    // Outer Line
    rectangle(500, 200, 800, 500);
  
    // Inner Line
    rectangle(550, 250, 750, 450);
  
    // Circles
    circle(600, 300, 30);
    circle(700, 300, 30);
    circle(600, 400, 30);
    circle(700, 400, 30);
    setfillstyle(SOLID_FILL, GREEN);
  
    // Rectangle Green
    floodfill(505, 215, 15);
  
    // Circle Green
    floodfill(615, 315, 15);
    floodfill(715, 315, 15);
    floodfill(615, 415, 15);
    floodfill(715, 415, 15);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(555, 255, 15);
}
  
void yellow_corner()
{
    // Outer Line
    rectangle(950, 200, 1250, 500);
  
    // Inner Line
    rectangle(1000, 250, 1200, 450);
  
    // Circles
    circle(1050, 300, 30);
    circle(1150, 300, 30);
    circle(1050, 400, 30);
    circle(1150, 400, 30);
    setfillstyle(SOLID_FILL, YELLOW);
  
    // Rectangle Yellow
    floodfill(955, 215, 15);
  
    // Circle Yellow
    floodfill(1065, 315, 15);
    floodfill(1165, 315, 15);
    floodfill(1065, 415, 15);
    floodfill(1165, 415, 15);
    setfillstyle(SOLID_FILL, WHITE);
    floodfill(1005, 255, 15);
}
  
void home()
{
    // Outer Line
    rectangle(800, 500, 950, 650);
  
    // Inner Line
    rectangle(840, 550, 910, 600);
  
    // Coloring Middle Space Black
    setfillstyle(SOLID_FILL, BLACK);
    floodfill(860, 595, 15);
  
    // Printing The Text 'HOME'
    settextstyle(8, 0, 3);
    outtextxy(848, 560, "HOME");
}

Output:

Ludo Board

LUDO BOARD

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