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BÀI TẬP THỰC HÀNH ĐỒ HỌA MÁY TÍNH_37DHTIN2 TRANSLATION – 2D #include #include #include #include void main() { int ch; int tx,ty; int gd=DETECT,gm; initgraph(&gd,&gm,"c:\\tc\\bgi"); setcolor(6); printf("\n\n\tDoi tuong: "); rectangle(100,150,150,100); setcolor(2); outtextxy(100,10,"TRANSLATION"); outtextxy(100,20," "); printf("\n\ttx: "); scanf("%d",&tx); printf("\tty: "); scanf("%d",&ty); getch(); cleardevice(); outtextxy(100,10,"TRANSLATION"); outtextxy(100,20," "); rectangle(100,150,150,100); delay(1000); rectangle(100+tx,150+ty,150+tx,100+ty); getch(); closegraph(); } Rotation, Scaling, Translation #include #include #include #include void translate(); void scale(); void rotate(); void main() { int ch; int gd=DETECT,gm; initgraph(&gd,&gm,"c:\\tc\\bgi"); setcolor(6); outtextxy (100,88,"Object."); rectangle(100,150,150,100); printf(" -MENU -"); printf("\n 1)Translate\n 2)Scale\n 3)Rotate"); printf("\nHay nhan chon: "); scanf("%d",&ch); cleardevice(); switch(ch) { case 1: translate(); break; case 2: scale(); break; case 3: rotate(); break; default: printf("Nhap sai lua chon"); break; } getch(); closegraph(); } void translate() { int tx,ty; setcolor(2); outtextxy(240,10,"TRANSLATION"); outtextxy(238,20," "); printf("\nNhap tx: "); scanf("%d",&tx); printf("\nNhap ty: "); scanf("%d",&ty); cleardevice(); rectangle(100,150,150,100); printf("\nAfter Translation"); rectangle(100+tx,150+ty,150+tx,100+ty); } void scale() { int sx,sy; setcolor(2); outtextxy(240,10,"SCALING"); outtextxy(238,20," "); printf("\nNhap sx: "); scanf("%d",&sx); printf("\nNhap sy: "); scanf("%d",&sy); cleardevice(); rectangle(100,150,150,100); printf("\nAfter Scaling"); rectangle(100*sx,150*sy,150*sx,100*sy); } void rotate() { float theta; int x1,x2,x3,x4; int y1,y2,y3,y4; int ax1,ax2,ax3,ax4,ay1,ay2,ay3,ay4; int refx,refy; printf("\nNhap he so theta: "); scanf("%f",&theta); theta=theta*(3.14/180); cleardevice(); setcolor(2); outtextxy(240,10,"ROTATE"); outtextxy(238,20," -"); refx=100; refy=100; x1=100; y1=100; x2=150; y2=100; x3=150; y3=150; x4=100; y4=150; ax1=refy+(x1-refx)*cos(theta)-(y1-refy)*sin(theta); ay1=refy+(x1-refx)*sin(theta)+(y1-refy)*cos(theta); ax2=refy+(x2-refx)*cos(theta)-(y2-refy)*sin(theta); ay2=refy+(x2-refx)*sin(theta)+(y2-refy)*cos(theta); ax3=refy+(x3-refx)*cos(theta)-(y3-refy)*sin(theta); ay3=refy+(x3-refx)*sin(theta)+(y3-refy)*cos(theta); ax4=refy+(x4-refx)*cos(theta)-(y4-refy)*sin(theta); ay4=refy+(x4-refx)*sin(theta)+(y4-refy)*cos(theta); rectangle(100,150,150,100); line(ax1,ay1,ax2,ay2); line(ax2,ay2,ax3,ay3); line(ax3,ay3,ax4,ay4); line(ax4,ay4,ax1,ay1); } CohenSutherlandClipping #include #include #include #include #include #define TRUE #define FALSE typedef unsigned int outcode; outcode CompOutCode(float x,float y); enum { TOP = 0x1, BOTTOM = 0x2, RIGHT = 0x4, LEFT = 0x8 }; float xmin,xmax,ymin,ymax; void clip(float x0,float y0,float x1,float y1) { outcode outcode0,outcode1,outcodeOut; int accept = FALSE,done = FALSE; outcode0 = CompOutCode(x0,y0); outcode1 = CompOutCode(x1,y1); { if(!(outcode0|outcode1)) { accept = TRUE; done = TRUE; } else if(outcode0 & outcode1) done = TRUE; else { float x,y; outcodeOut = outcode0?outcode0:outcode1; if(outcodeOut & TOP) { x = x0+(x1-x0)*(ymax-y0)/(y1-y0); y = ymax; } else if(outcodeOut & BOTTOM) { x = x0+(x1-x0)*(ymin-y0)/(y1-y0); y = ymin; } else if(outcodeOut & RIGHT) { y = y0+(y1-y0)*(xmax-x0)/(x1-x0); x = xmax; } else { y = y0+(y1-y0)*(xmin-x0)/(x1-x0); x = xmin; } if(outcodeOut==outcode0) { x0 = x; y0 = y; outcode0 = CompOutCode(x0,y0); } else { x1 = x; y1 = y; outcode1 = CompOutCode(x1,y1); } } }while(done==FALSE); if(accept) line(x0,y0,x1,y1); outtextxy(150,20,"POLYGON AFTER CLIPPING"); rectangle(xmin,ymin,xmax,ymax); } outcode CompOutCode(float x,float y) { outcode code = 0; if(y>ymax) code|=TOP; else if(yxmax) code|=RIGHT; else if(x