CS602 - Computer Graphics

@wafa-sehar said in CS602 Assignment 3 Solution and Discussion:

Question # 2:
What are the Open GL Buffers and how can you create and allocate these buffers. Discuss with an example.

Nearly everything you may ever do with OpenGL will involve buffers full of data. Buffers in
OpenGL are depicted as buffer objects. As with several things in OpenGL, buffer objects are
named using GLuint values. Values are stored using the glGenBuffers () command.
Example: void glGenBuffers(GLsizei n, GLuint *buffers);
After calling glGenBuffers(),you will have an array of buffer object names in buffers, but at this
time, they’re simply placeholders. They’re not really buffer objects yet. The buffer objects
themselves don’t seem to be really created till the name is first sure to one of the buffer binding
points on the context. this can be important as a result of OpenGL could build choices regarding
the most effective way to assign memory for the buffer object based on where it’s bound.

Graphics library for 64 bit Dev CPP.rar

Solution.cpp

#include <graphics.h> // driver code int main() { // gm is Graphics mode which is a computer display // mode that generates image using pixels. // DETECT is a macro defined in "graphics.h" header file int gd = DETECT, gm; int left = 200, top = 20; int right = 430, bottom = 460; // initgraph initializes the graphics system // by loading a graphics driver from disk initgraph(&gd, &gm, ""); setcolor(WHITE); settextstyle(DEFAULT_FONT, HORIZ_DIR, 2); outtextxy(10, 20, (char*)"BC123456789"); setcolor(WHITE); setfillstyle(SOLID_FILL,WHITE); rectangle(left, top, right, bottom); bar(200,20,430,460); setcolor(LIGHTRED); setfillstyle(SOLID_FILL,LIGHTRED); circle(left+100,top+280,50); floodfill(left+100,top+280,LIGHTRED); setcolor(LIGHTGREEN); setfillstyle(SOLID_FILL,LIGHTGREEN); circle(left+160,top+340,30); floodfill(left+160,top+340,LIGHTGREEN); setcolor(LIGHTBLUE); line(left,top+280,right,bottom-20); setcolor(LIGHTGREEN); line(left,top+300,right,bottom); setcolor(LIGHTRED); line(left,top+320,right-30,bottom); getch(); // closegraph function closes the graphics // mode and deallocates all memory allocated // by graphics system . closegraph(); }

Download Complete Solution

Q. 1 Solution Idea

a. Final intensity of light is (0.4,0.7,0) +(0.2,0.1,0.5) +(-0.5, -0.6,0.5) +(-0.1, -
0.2,0) = (0,0,1)

b. Overall Contribution: id ⨂ cs = (0,0,1) ⨂ (0.5,0.7,0.8)
= (0,0,0.8)

c. Red and Green components will remain absent from the scene

d. The object will look blue in the presence of light sources.

Q. 2 Solution Idea:
6ae1ea20-d477-4d0f-a273-454a23c93b08-image.png

//<!--CS602 ASSIGNMENT 2 SOLUTION--> //<!--FALL 2019--> //<!--DUE DATE: 27 NOVEMBER, 2019--> //PRE-PARED BY: SUPERSTARWEBTECH.COM //CONNECT WITH US:FACEBOOK.COM/SUPERSTARWEBTECH //E-MAIL: [email protected] #include <stdio.h> #include <stdlib.h> #include <conio.h> #include <graphics.h> #include <math.h> class House { private: int x1,x2,x3,x4,x5; int y1,y2,y3; int dx1, dx2; int dy1, dy2; int xc,yc; public: House() { xc=45; yc=65; //center of figure x1=30; x2=x1+50; x3=20; x4=x3+20; x5=x4+50; y1=30; y2=y1+20; y3=y2+50; dx1=x3+5; dx2=dx1+10; dy1=y2+30; dy2=dy1+20; } void translate(int tx, int ty) //draw translate house { x1+=tx; x2+=tx; x3+=tx; x4+=tx; x5+=tx; y1+=ty; y2+=ty; y3+=ty; dx1+=tx; dx2+=tx; dy1+=ty; dy2+=ty; } void scale(int sx, int sy) //draw scaled house { x1=xc+(x1-xc)*sx; x2=xc+(x2-xc)*sx; x3=xc+(x3-xc)*sx; x4=xc+(x4-xc)*sx; x5=xc+(x5-xc)*sx; y1=yc+(y1-yc)*sy; y2=yc+(y2-yc)*sy; y3=yc+(y3-yc)*sy; dx1=xc+(dx1-xc)*sx; dx2=xc+(dx2-xc)*sx; dy1=yc+(dy1-yc)*sy; dy2=yc+(dy2-yc)*sy; } void reflectx(int rx) { y1=-y1+rx; y2=-y2+rx; y3=-y3+rx; dy1=-dy1+rx; dy2=-dy2+rx; } void reflecty(int ry) { x1=-x1+ry; x2=-x2+ry; x3=-x3+ry; x4=-x4+ry; x5=-x5+ry; dx1=-dx1+ry; dx2=-dx2+ry; } void drawH() //draw house { int arr[]={x1,y1,x2,y1,x5,y2,x5,y3,x3,y3,x3,y2,x1,y1,x4,y2,x4,y3,x3,y3,x3,y2,x5,y2}; drawpoly(12,arr); //draw house rectangle(dx1,dy1,dx2,dy2); //draw house door } void fillH() { setfillstyle(HATCH_FILL,GREEN); floodfill(x1+1,y1+10,WHITE); floodfill(x1+1,y1+1,WHITE); setfillstyle(SOLID_FILL,RED); floodfill(x3+1,y2+1,WHITE); setfillstyle(SOLID_FILL,YELLOW); floodfill(x4+1,y2+1,WHITE); setfillstyle(SOLID_FILL,GREEN); floodfill(dx1+1,dy1+1,WHITE); } void fillH2(){ setfillstyle(HATCH_FILL,GREEN); floodfill(x1+1,y1-10,WHITE); floodfill(x1+1,y1-1,WHITE); setfillstyle(SOLID_FILL,RED); floodfill(x3+1,y2-1,WHITE); setfillstyle(SOLID_FILL,YELLOW); floodfill(x4+1,y2-1,WHITE); setfillstyle(SOLID_FILL,GREEN); floodfill(dx1+1,dy1-1,WHITE); } }; int main() { int gd=DETECT, gm; initgraph(&gd,&gm,(char*)" "); setcolor(WHITE); settextstyle(DEFAULT_FONT, HORIZ_DIR, 2); outtextxy(2, 2, (char*)"BC123456789"); House house; //draw main house house.drawH(); house.fillH(); outtextxy(2, 110, (char*)"1) Original"); //draw translated house house.translate(200,0); house.drawH(); house.fillH(); outtextxy(200, 110, (char*)"2) Translated"); //draw scaled house house.translate(-190,70); house.scale(2,2); house.drawH(); house.fillH(); outtextxy(2, 280, (char*)"3) Scaled"); int x=90; int y=350; House h2; // draw reflected house h2.translate(200,70); h2.reflecty(x); h2.reflectx(y); h2.reflecty(x); h2.drawH(); h2.fillH2(); outtextxy(200, 270, (char*)"4) Reflected"); getch(); closegraph(); } //<!--NOTE--> //<!--MAKE CHANGES ACCORDING TO YOUR REQUIREMENTS--> //<!--DO NOT POST ON OTHER PORTALS THIS WILL LEAD TO COPYING OF CODE AND THEN YOU WILL GET ZERO MARKS FOR IT--> //<!--PLUS TYPE YOUR OWN SOLUTION FOR NOT LOSING MARKS--> //<!--DO NOT COPY PASTE--> //<!--WE ARE NOT RESPONSIBLE FOR GETTING ZERO MARKS IN ASSIGNMENT--> //PRE-PARED BY: SUPERSTARWEBTECH.COM //CONNECT WITH US:FACEBOOK.COM/SUPERSTARWEBTECH //E-MAIL: [email protected] CS602_2_FALL_2019.txt Displaying CS602_2_FALL_2019.txt.