3666c7fa69
The Home tab was already titled "Draw"; rename the module to match:
folder modules/home → modules/draw, HomeModule → DrawModule, id "home"
→ "draw". The inner draw/ command folder is kept (modules::draw::draw).
Update build.rs PRIORITY ("home" → "draw") so the tab returns to the
front of the ribbon; registry.rs regenerates accordingly.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
88 lines
2.6 KiB
Rust
88 lines
2.6 KiB
Rust
// AREA command — compute area and perimeter of a polygon picked point by point.
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// Press Enter to close and calculate.
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use glam::Vec3;
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use crate::command::{CadCommand, CmdResult};
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use crate::scene::model::wire_model::WireModel;
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pub struct AreaCommand {
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points: Vec<Vec3>,
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}
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impl AreaCommand {
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pub fn new() -> Self {
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Self { points: vec![] }
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}
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}
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impl CadCommand for AreaCommand {
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fn name(&self) -> &'static str {
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"AREA"
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}
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fn prompt(&self) -> String {
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if self.points.is_empty() {
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"AREA Specify first corner point (Enter to cancel):".into()
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} else {
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format!(
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"AREA Specify next point ({} picked, Enter to calculate):",
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self.points.len()
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)
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}
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}
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fn on_point(&mut self, pt: Vec3) -> CmdResult {
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self.points.push(pt);
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CmdResult::NeedPoint
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}
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fn on_enter(&mut self) -> CmdResult {
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if self.points.len() < 3 {
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return CmdResult::Cancel;
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}
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// Shoelace formula in the world XY plane.
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let n = self.points.len();
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let mut area_sum = 0.0f32;
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let mut perimeter = 0.0f32;
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for idx in 0..n {
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let a = self.points[idx];
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let b = self.points[(idx + 1) % n];
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area_sum += a.x * b.y - b.x * a.y;
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perimeter += (b - a).length();
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}
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let area = (area_sum * 0.5).abs();
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let msg = format!("Area = {area:.4}, Perimeter = {perimeter:.4}");
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CmdResult::Measurement(msg)
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}
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fn on_mouse_move(&mut self, pt: Vec3) -> Option<WireModel> {
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if self.points.is_empty() {
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return None;
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}
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let mut pts: Vec<[f32; 3]> = self.points.iter().map(|p| [p.x, p.y, p.z]).collect();
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pts.push([pt.x, pt.y, pt.z]);
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pts.push([self.points[0].x, self.points[0].y, self.points[0].z]);
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Some(WireModel {
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name: "area_preview".into(),
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points: pts,
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color: WireModel::CYAN,
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selected: false,
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pattern_length: 0.0,
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pattern: [0.0; 8],
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line_weight_px: 1.0,
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snap_pts: vec![],
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tangent_geoms: vec![],
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aci: 0,
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key_vertices: vec![],
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aabb: WireModel::UNBOUNDED_AABB,
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plinegen: true,
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vp_scissor: None,
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fill_tris: vec![],
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})
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}
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}
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// ── Autocomplete registry ─────────────────────────────────
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inventory::submit!(crate::command::CommandRegistration { names: &["AREA"] }); // AreaCommand
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