opencv4cvml/ch03/BasicOp

BasicOp.rs

/**
 * original source : https://github.com/sunkyoo/opencv4cvml/blob/master/ch03/BasicOp/main.cpp
 * Cargo.toml
 *.  opencv = "0.82.0"
 */
use opencv::core::*;

/* Point : https://docs.rs/opencv/0.83.0/opencv/core/struct.Point_.html
 */
fn point_op() {
    let mut pt1 = Point::default();
    pt1.x = 5;
    pt1.y = 10;
    let pt2 = Point::new(10, 30);
    let pt3 = pt1 + pt2;
    let pt4 = pt1 * 2;

    let d1 = pt1.dot(pt2); // dot product. 5*10 + 10*30
    let b1 = pt1 == pt2; // FALSE

    println!("{},{}", pt1.x, pt1.y);
    println!("{},{}", pt2.x, pt2.y);
    println!("{},{}", pt3.x, pt3.y);
    println!("{},{}", pt4.x, pt4.y);
    println!("{}", d1);
    println!("{}", b1);
}

/* Size : https://docs.rs/opencv/0.83.0/opencv/core/struct.Size_.html
 */
fn size_op() {
    let mut sz1 = Size::default();
    let sz2 = Size::new(10, 20);

    sz1.width = 5;
    sz1.height = 10;

    let sz3 = sz1 + sz2;
    let sz4 = sz1 * 2;

    let area1 = sz4.area();

    println!("{} {}", sz1.width, sz1.height);
    println!("{} {}", sz2.width, sz2.height);
    println!("{} {}", sz3.width, sz3.height);
    println!("{} {}", sz4.width, sz4.height);
    println!("sz4.area {}", area1);
}

/* Rect : https://docs.rs/opencv/0.83.0/opencv/core/struct.Rect_.html
 */
fn rect_op() {
    let rc1 = Rect::default();
    let rc2 = Rect::new(10, 10, 60, 40);
    let rc3 = rc1 + Size::new(50, 40); // 50x40 from (0,0)
    let rc4 = rc2 + Point::new(10, 10); // 60x40 from 20,20
    let rc5 = rc3 & rc4; // 30x20 from 20,20
    let rc6 = rc3 | rc4; // 80x60 from 0,0

    println!("{}x{} from {},{}", rc1.width, rc1.height, rc1.x, rc1.y);
    println!("{}x{} from {},{}", rc2.width, rc2.height, rc2.x, rc2.y);
    println!("{}x{} from {},{}", rc3.width, rc3.height, rc3.x, rc3.y);
    println!("{}x{} from {},{}", rc4.width, rc4.height, rc4.x, rc4.y);
    println!("{}x{} from {},{}", rc5.width, rc5.height, rc5.x, rc5.y);
    println!("{}x{} from {},{}", rc6.width, rc6.height, rc6.x, rc6.y);
}

/* RotectedRect : https://docs.rs/opencv/0.83.0/opencv/core/struct.RotatedRect.html
 */
fn rotated_rect_op() {
    let rr1 = RotatedRect::new(Point2f::new(40.0, 30.0), Size2f::new(40.0, 20.0), 30.0).unwrap();
    let mut pts = [Point2f::default(); 4];
    let r = rr1.points(&mut pts);

    /*
     * 17.679493, 28.660255
     * 27.679493, 11.339746
     * 62.320507, 31.339745
     * 52.320507, 48.660255
     */
    for point in &pts {
        println!("{}, {}", point.x, point.y);
    }
}

fn main() {
    point_op();
    size_op();
    rect_op();
    rotated_rect_op();
}