Skip to main content

Posts

Showing posts with the label 3D in C

3D Projection

I hope you will remember  engineering graphics in your first year of engineering, This basic idea will be useful in understanding the concept.  Usually projection is nothing but the representation of a 3D object in a 2D form with the angle we view. Basically we represent a 3D object in a 2D form with three basic views Front View Top View Side View In the following code, the user is asked to enter the co-ordinates for a 2D object and with the depth we enter it will generate a 3D object. For example , consider a cube - the view you see without a depth will be a square. Note: In computer graphics the co-ordinates start from top-left (0,0) of your screen CODE : #include <stdio.h> #include <stdlib.h> #include <graphics.h> #include <conio.h> int ARRAY_SIZE; int array_max(int *arr, int returnIndex); int array_min(int *arr, int returnIndex); void draw3d(int sides, int *x, int *y, int depth); void drawFrontView(int sides, int *x, int *y);...

3D Rotation

#include <stdio.h> #include <stdlib.h> #include<graphics.h> #include<conio.h> #include<math.h> void draw3d(int fs,int x[20],int y[20],int tx,int ty,int d); void draw3d(int fs,int x[20],int y[20],int tx,int ty,int d) { int i,j,k=0; for(j=0;j<2;j++) { for(i=0;i<fs;i++) { if(i!=fs-1) { line(x[i]+tx+k,y[i]+ty-k,x[i+1]+tx+k,y[i+1]+ty-k); } else line(x[i]+tx+k,y[i]+ty-k,x[0]+tx+k,y[0]+ty-k); } k=d; } for(i=0;i<fs;i++) { line(x[i]+tx,y[i]+ty,x[i]+tx+d,y[i]+ty-d); } } void main() { int gd=DETECT,gm; int x[20],y[20],x1[20],y1[20],tx=0,ty=0,i,j,k,fs,temp,d,a; float theta; initgraph(&gd,&gm,""); printf("No of sides (front view only) : "); scanf("%d",&fs); printf("Co-ordinates : "); for(i=0;i<fs;i++) { printf("(x%d,y%d)",i,i); scanf("%d%d",&x[i],&y[i]); } printf("Depth :"); scanf("%d",&d); draw3d(fs,x,y,tx,ty,d); printf("translation (x,y),rotate...

3D Scaling

#include <stdio.h> #include <stdlib.h> #include<graphics.h> #include<conio.h> #include<math.h> void draw3d(int fs,int x[20],int y[20],int tx,int ty,int d); void draw3d(int fs,int x[20],int y[20],int tx,int ty,int d) { int i,j,k=0; for(j=0;j<2;j++) { for(i=0;i<fs;i++) { if(i!=fs-1) line(x[i]+tx+k,y[i]+ty-k,x[i+1]+tx+k,y[i+1]+ty-k); else line(x[i]+tx+k,y[i]+ty-k,x[0]+tx+k,y[0]+ty-k); } k=d; } setfillstyle(1,15); for(i=0;i<fs;i++) { line(x[i]+tx,y[i]+ty,x[i]+tx+d,y[i]+ty-d); } } void main() { int gd=DETECT,gm; int x[20],y[20],x1[20],y1[20],tx=0,ty=0,i,j,k,fs,temp,d,xm,ym; float theta; initgraph(&gd,&gm,""); printf("no of sides (front view only) : "); scanf("%d",&fs); printf("co-ordinates : "); for(i=0;i<fs;i++) { printf("(x%d,y%d)",i,i); scanf("%d%d",&x[i],&y[i]); } printf("Depth :"); scanf("%d",&d); draw3d(fs,x,y,tx,ty,d); printf("magni...

3D Translation

#include <stdio.h> #include <stdlib.h> #include<graphics.h> #include<conio.h> void draw3d(int fs,int x[20],int y[20],int tx,int ty,int d); void draw3d(int fs,int x[20],int y[20],int tx,int ty,int d) { int i,j,k=0; for(j=0;j<2;j++) { for(i=0;i<fs;i++) { if(i!=fs-1) line(x[i]+tx+k,y[i]+ty-k,x[i+1]+tx+k,y[i+1]+ty-k); else line(x[i]+tx+k,y[i]+ty-k,x[0]+tx+k,y[0]+ty-k); } k=d; } for(i=0;i<fs;i++) { line(x[i]+tx,y[i]+ty,x[i]+tx+d,y[i]+ty-d); } } void main() { int gd=DETECT,gm; int x[20],y[20],tx=0,ty=0,i,fs,d; initgraph(&gd,&gm,""); printf("no of sides (front view only) : "); scanf("%d",&fs); printf("co-ordinates : "); for(i=0;i<fs;i++) { printf("(x%d,y%d)",i,i); scanf("%d%d",&x[i],&y[i]); } printf("Depth :"); scanf("%d",&d); draw3d(fs,x,y,tx,ty,d); printf("translation (x,y)"); scanf("%d%d",&tx,&ty); draw3d(fs,x,y,tx,ty,d);...