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CG 6

This document outlines Experiment 6 for a Computer Science and Engineering course, focusing on the reflection of a triangle. It includes the aim, objectives, algorithm, implementation code in C++, and expected learning outcomes related to graphical transformations. The experiment emphasizes understanding reflection in a coordinate system and utilizing graphics programming for visualization.

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Bhumika 12Non medical Dia.
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12 views3 pages

CG 6

This document outlines Experiment 6 for a Computer Science and Engineering course, focusing on the reflection of a triangle. It includes the aim, objectives, algorithm, implementation code in C++, and expected learning outcomes related to graphical transformations. The experiment emphasizes understanding reflection in a coordinate system and utilizing graphics programming for visualization.

Uploaded by

Bhumika 12Non medical Dia.
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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DEPARTMENT OF

COMPUTER SCIENCE &


ENGINEERING
Experiment 6
Student Name: Bhumika UID: 22BCS16875
Branch: BE-CSE Section/Group: 626-A
Semester: 6 Date of Performance: 04/03/25
Subject Name: CG LAB Subject Code: 22CSH-352

1. Aim:
Analyze and implement the reflection of a triangle.

2. Objective:
To implement and analyze the reflection of a point about a triangle.

3. Algorithm:
 Initialize Graphics Mode using initgraph().
 Take Input for triangle coordinates (x1,y1),(x2,y2),(x3,y3)(x1, y1), (x2, y2), (x3,
y3)(x1,y1),(x2,y2),(x3,y3).
 Get Screen Dimensions (m = getmaxx(), n = getmaxy()).
 Draw Original Triangle and label it.
 Draw Coordinate Axes (X and Y).
 Reflect Along X-Axis: Update y values and draw the triangle.
X=X and Y= -Y
 Reflect Along Y-Axis: Update x values and draw the triangle.
X= -X and Y= Y

4. Implementation/Code:
#include <graphics.h>
#include <conio.h>
#include <iostream.h>

int main() {
int gd = DETECT, gm;
initgraph(&gd, &gm, "c:\\turboc3\\bgi");

cout << "Vikash Yadav 22BCS12274" << endl;


DEPARTMENT OF
COMPUTER SCIENCE &
ENGINEERING
int x1, y1, x2, y2, x3, y3;
cout << "Enter the coordinates of the triangle:\n";
cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;

int m = getmaxx();
int n = getmaxy();

setcolor(6);
line(x1, y1, x2, y2);
line(x2, y2, x3, y3);
line(x3, y3, x1, y1);
outtextxy(x1, y1 + 10, "Original Triangle");

setcolor(4);
line(m / 2, 0, m / 2, n);
line(0, n / 2, m, n / 2);

setcolor(3);
int c1 = (n / 2) - y1;
int c2 = (n / 2) - y2;
int c3 = (n / 2) - y3;

int ry1 = y1 + (c1 * 2);


int ry2 = y2 + (c2 * 2);
int ry3 = y3 + (c3 * 2);

line(x1, ry1, x2, ry2);


line(x2, ry2, x3, ry3);
line(x3, ry3, x1, ry1);
outtextxy(x1, ry1 + 10, "Reflection along X-axis");

setcolor(9);
int a1 = (m / 2) - x1;
int a2 = (m / 2) - x2;
int a3 = (m / 2) - x3;

int rx1 = x1 + (a1 * 2);


int rx2 = x2 + (a2 * 2);
DEPARTMENT OF
COMPUTER SCIENCE &
ENGINEERING
int rx3 = x3 + (a3 * 2);

line(rx1, ry1, rx2, ry2);


line(rx2, ry2, rx3, ry3);
line(rx3, ry3, rx1, ry1);
outtextxy(rx2 - 20, ry2 + 10, "Reflection along Y-axis");

getch();
closegraph();
}

5. Output:

6. Learning Outcome:
 Understanding Reflection – Learning how reflection works.
 Coordinate System Reflection – Reflecting the triangle along x-axis and then alongy-axis
to get the final coordinates of the reflected triangle.
 Using Graphics in C++ – Implementing graphics.h to visualize transformations.

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