Homework #2 - Line, Circle, Web

For this homework assignment, I had to:
- Create a line using only point commands and without using the line command from Processing.
- Create a circle using only point commands and without using the ellipse command from Processing.
- Create a "web" using a grid of straight lines by calling the line command over and over again.

//Line

void setup() {

size(300, 300);

}
void draw() {

drawMyLine(20, 100, 20, 100);

}

void drawMyLine(int x1, int x2, int y1, int y2){

int dx = x2-x1;

int dy = y2-y1;

float error = 0;

float slope = (float)dy/dx;

int y = y1;

for(int x=x1; x <= x2; x++){

point(x,y);

error = error + slope;

if(abs(error) >= 0.5){

y = y+1;

error = error - 1.0;

}

}

}

//Circle

void setup() {

size(300, 300);

}
void draw() {

drawMyCircle(150, 150, 100);

}

void drawMyCircle(int x1, int y1, int radius){

int f = 1 - radius;

int fx = 1;

int fy = -2*radius;

int x=0;

int y=radius;

point(x1,y1+radius);

point(x1,y1-radius);

point(x1+radius,y1);

point(x1-radius,y1);

while(x <>

if(f>=0){
y--;
fy += 2;
f += fy;

}

x++;

fx += 2;

f += fx;

point(x1 + x,y1 + y);

point(x1 - x,y1 + y);

point(x1 + x,y1 - y);

point(x1 - x,y1 - y);

point(x1 + y,y1 + x);

point(x1 - y,y1 + x);

point(x1 + y,y1 - x);

point(x1 - y,y1 - x);
}
}

//Web

void setup() {
size(300, 300);
}

void draw() {
drawMyWeb(75);
}

void drawMyWeb(int n) {
for(int i=0; i < n; i++){
line(0,n-i,i,0);
}

}