Draw a line

src/app.rs

@@ -1,11 +1,13 @@
 pub mod components;
 pub mod draw;
 mod structure;
-use serde_lexpr::{from_str, print, to_string_custom};
 
 use chrono::prelude::Utc;
 use chrono_humanize::HumanTime;
+use egui::{emath, Color32};
+use egui::{pos2, Painter, Pos2, Rect, Shape};
 use fake::{Fake, Faker};
+use serde_lexpr::{from_str, print, to_string_custom};
 use std::collections::HashMap;
 use std::path::PathBuf;
 use uuid::Uuid;
@@ -219,7 +221,7 @@ impl eframe::App for PlannerApp {
                                 description: Faker.fake::<String>(),
                                 c_type: components::ComponentType::Door,
                                 material: components::Material::Metal,
-                                shapes: vec![],
+                                items: vec![],
                             },
                         )]),
                     };
@@ -262,14 +264,21 @@ impl eframe::App for PlannerApp {
 
         egui::CentralPanel::default().show(ctx, |ui| {
             // The central panel the region left after adding TopPanel's and SidePanel's
+            let painter = Painter::new(
+                ui.ctx().clone(),
+                ui.layer_id(),
+                ui.available_rect_before_wrap(),
+            );
+            self.paint(&painter);
+            ui.expand_to_include_rect(painter.clip_rect());
 
-            ui.heading("eframe template");
-            ui.hyperlink("https://github.com/emilk/eframe_template");
-            ui.add(egui::github_link_file!(
-                "https://github.com/emilk/eframe_template/blob/master/",
-                "Source code."
-            ));
-            egui::warn_if_debug_build(ui);
+            // ui.heading("eframe template");
+            // ui.hyperlink("https://github.com/emilk/eframe_template");
+            // ui.add(egui::github_link_file!(
+            //     "https://github.com/emilk/eframe_template/blob/master/",
+            //     "Source code."
+            // ));
+            // egui::warn_if_debug_build(ui);
         });
 
         if false {
@@ -282,3 +291,32 @@ impl eframe::App for PlannerApp {
         }
     }
 }
+
+impl PlannerApp {
+    fn paint(&mut self, painter: &Painter) {
+        let mut shapes: Vec<Shape> = Vec::new();
+
+        let rect = painter.clip_rect();
+        let to_screen = emath::RectTransform::from_to(
+            Rect::from_center_size(Pos2::ZERO, rect.square_proportions()),
+            rect,
+        );
+
+        let mut paint_line = |points: [Pos2; 2], color: Color32, width: f32| {
+            let line = [to_screen * points[0], to_screen * points[1]];
+
+            // culling
+            if rect.intersects(Rect::from_two_pos(line[0], line[1])) {
+                shapes.push(Shape::line_segment(line, (width, color)));
+            }
+        };
+
+        paint_line(
+            [pos2(0.0, 0.0), pos2(10.0, 10.0)],
+            Color32::from_additive_luminance(255),
+            20.0,
+        );
+
+        painter.extend(shapes);
+    }
+}

src/app/components.rs

@@ -1,4 +1,4 @@
-use super::draw::Shape;
+use super::draw::DrawItem;
 use uuid::Uuid;
 
 #[derive(serde::Deserialize, serde::Serialize, PartialEq)]
@@ -37,7 +37,7 @@ pub struct Component {
     pub description: String,
     pub c_type: ComponentType,
     pub material: Material,
-    pub shapes: Vec<Shape>,
+    pub items: Vec<DrawItem>,
 }
 
 impl Default for Component {
@@ -48,7 +48,7 @@ impl Default for Component {
             description: String::default(),
             c_type: ComponentType::Furniture,
             material: Material::Wood,
-            shapes: vec![],
+            items: vec![],
         }
     }
 }

untitled.splan

@@ -8,14 +8,15 @@
 		(0 
 			(zindex . 0)
 			(label . "Meow")
-			(visible . #t)
+			(visible . #f)
 			(components 
 				("bbf8f70a-60c1-4859-924b-c360b897dc6c" 
 					(id . "73e48d43-2ec4-4397-8289-54ddc87f9886")
-					(label . "sWzh9LGiSKrlQsRWoK") (description . "Bq59shWXHCKhTH1") 
+					(label . "sWzh9LGiSKrlQsRWoK")
+					(description . "Bq59shWXHCKhTH1") 
 					(c_type . Door)
 					(material . Metal)
-					(shapes)
+					(items)
 				)
 			)
 		)
@@ -30,7 +31,7 @@
 					(description . "7tCDffx2dFFzIrT")
 					(c_type . Door)
 					(material . Metal)
-					(shapes)
+					(items)
 				)
 			)
 		) 
@@ -45,7 +46,7 @@
 					(description . "hi9js3X8dWaWZ")
 					(c_type . Door)
 					(material . Metal)
-					(shapes)
+					(items)
 				)
 			)
 		)