33 lines
834 B
Rust
33 lines
834 B
Rust
use crate::point::Point;
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use crate::transformer::Transformers;
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use crate::worldstate::WorldState;
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use serde::{Deserialize, Serialize};
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//use std::f32::consts::PI;
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/// Rotate
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#[derive(Serialize, Deserialize, Debug, Clone, Copy)]
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pub struct Rotate {
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cx: f32,
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cy: f32,
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angle: f32,
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}
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impl Transformers for Rotate {
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fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
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point_list
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.iter()
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.map(|pt| {
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let dx = pt.x - self.cx;
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let dy = pt.y - self.cy;
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let cos = self.angle.cos();
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let sin = self.angle.sin();
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let x = (dx * cos - dy * sin) + self.cx;
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let y = (dx * sin + dy * cos) + self.cy;
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Point { x, y, ..*pt }
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})
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.collect()
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}
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}
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