I have a program in JavaScript, but I can't display the graph points like (2,1), (3,2), (4,2), (5,3), (6,4), (7,4), (8,5).
function dda(x1, y1, x2, y2) {
var dx = x2 - x1;
var dy = y2 - y1;
if (Math.abs(dx) > Math.abs(dy)) {
var step = Math.abs(dx);
} else {
var step = Math.abs(dy);
}
var x_inc = dx / step;
var y_inc = dy / step;
var x = x1;
var y = y1;
for (var k = 1; k < step; k++) {
x = x + x_inc;
y = y + y_inc; //I'm confused about this part
}
return x;
}
console.log(dda(2, 1, 8, 5));You need to collect x and y values.
Beside this, you need to start with k = 0 and increment the values after using the values.
function dda(x1, y1, x2, y2) {
const
dx = x2 - x1,
dy = y2 - y1,
step = Math.abs(dx) > Math.abs(dy)
? Math.abs(dx)
: Math.abs(dy),
x_inc = dx / step,
y_inc = dy / step,
result = [];
for (let k = 0, x = x1, y = y1; k < step; k++) {
result.push([x, y]);
x += x_inc;
y += y_inc;
}
return result;
}
console.log(dda(2, 1, 8, 5));.as-console-wrapper { max-height: 100% !important; top: 0; }