8.scaling of triangle
#include <stdio.h>
#include <stdlib.h>
#define W 300
#define H 300
static int img[H][W][3] = {0};
void plot(int x, int y, int r, int g, int b){
if(x>=0 && x<W && y>=0 && y<H){
img[y][x][0] = r;
img[y][x][1] = g;
img[y][x][2] = b;
}
}
/* DDA Line Drawing */
void drawLine(int x1, int y1, int x2, int y2){
int dx = x2 - x1;
int dy = y2 - y1;
int steps = abs(dx) > abs(dy) ? abs(dx) : abs(dy);
float xinc = dx / (float)steps;
float yinc = dy / (float)steps;
float x = x1, y = y1;
for(int i=0; i<=steps; i++){
plot((int)(x+0.5), (int)(y+0.5), 255,255,255);
x += xinc;
y += yinc;
}
}
void saveImage(char *fname){
FILE *f = fopen(fname,"w");
fprintf(f,"P3\n%d %d\n255\n",W,H);
for(int y=0;y<H;y++){
for(int x=0;x<W;x++)
fprintf(f,"%d %d %d ",
img[y][x][0],
img[y][x][1],
img[y][x][2]);
fprintf(f,"\n");
}
fclose(f);
}
int main(){
