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pub struct Point { | |
x: i32, | |
y: i32, | |
} | |
fn line(x1: i32, y1: i32, x2: i32, y2: i32, map: &Map) -> Vec<Point> { | |
let mut coordinates = vec![]; | |
let mut x1 = x1; | |
let mut y1 = y1; | |
let dx = i32::abs(x2 - x1); | |
let dy = i32::abs(y2 - y1); | |
let sx = if x1 < x2 { 1 } else { -1 }; | |
let sy = if y1 < y2 { 1 } else { -1 }; | |
let mut err = if dx > dy { dx / 2 } else { -dy / 2 }; | |
let mut err2; | |
loop { | |
coordinates.push(Point { x: x1, y: y1 }); | |
if x1 == x2 && y1 == y2 || map[x1 as usize][y1 as usize].block_sight { | |
break; | |
} | |
err2 = err; | |
if err2 > -dx { | |
err -= dy; | |
x1 += sx; | |
} | |
if err2 < dy { | |
err += dx; | |
y1 += sy; | |
} | |
} | |
coordinates | |
} |
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