shape creation works!

src/create.rs

@@ -0,0 +1,216 @@
+use bevy::prelude::*;
+use crate::*;
+use bevy_prototype_lyon::prelude::*;
+
+pub fn create_sys(
+    mut coms: Commands,
+    state: Res<UiState>,
+    mouse: Res<Input<MouseButton>>,
+    wnds: Res<Windows>,
+    q_cam: Query<(&Camera, &GlobalTransform), With<MainCamera>>,
+    mut first_point: Local<Option<ShapeData>>,
+    paths: Query<&mut Path>,
+    spoints: Query<&SPoint>,
+) {
+    let mouse_pos = get_mouse_pos(&q_cam, &wnds);
+        
+    if let Some(mouse_pos) = mouse_pos {
+
+        if let Some(sd) = &mut *first_point {
+            update_main_shape_creation(paths, spoints, sd, mouse_pos);
+
+            if mouse.just_released(MouseButton::Left) {
+                let done = insert_edge_to_shape_creation(sd, mouse_pos, &mut coms);
+
+                if done {
+                    coms.spawn()
+                        .insert(first_point.take().unwrap());
+    
+                    *first_point = None;
+                }
+            }
+            else if mouse.just_released(MouseButton::Right) {
+                if let Some(e) = &sd.center {
+                    coms.entity(*e).despawn();
+                }
+                coms.entity(sd.main_shape).despawn();
+                sd.edges.iter().for_each(|e| coms.entity(*e).despawn());
+
+                *first_point = None;
+            }
+        }
+    
+        else if mouse.just_released(MouseButton::Left) {
+            // We can now spawn a shape in the current mouse position...
+            // Spawn the first point
+            *first_point = Some(create_new_shape(&mut coms, mouse_pos, state.create_shape));
+        }
+    }
+}
+
+/// Inserts a new edge/point to the currently created shape, return if the shape is complete
+fn insert_edge_to_shape_creation(
+    sd: &mut ShapeData,
+    mpos: Vec2,
+    coms: &mut Commands,
+) -> bool {
+    // Spawn the new point
+    // Spawn the first point(where the user just clicked)
+    let shape = shapes::Circle {
+        radius: 3.0,
+        center: mpos,
+    };
+    let np = coms.spawn_bundle(GeometryBuilder::build_as(
+        &shape, 
+        DrawMode::Fill(FillMode::color(Color::RED)),
+        Transform::from_translation(Vec3::new(0.0, 0.0, 1.0))
+    ))
+    .insert(SPoint(mpos))
+    .id();
+
+    match sd.shape {
+        CreateShape::Triangle => {
+            sd.edges.push(np);
+            sd.edges.len() == 3
+        },
+        CreateShape::Square => {
+            sd.edges.push(np);
+            sd.edges.len() == 2
+        },
+        CreateShape::SquareCenter | CreateShape::Circle => {
+            sd.edges.push(np);
+            sd.edges.len() == 1
+        },
+        CreateShape::Capsule => {
+            if sd.edges.len() == 1 {
+                sd.edges.push(np);
+                false
+            }
+            else if sd.edges.len() == 2 {
+                sd.center = Some(np);
+                true
+            }
+            else {
+                panic!("Capsule was started without any edges... WHAT!");
+            }
+        },
+    }
+}
+
+fn update_main_shape_creation(
+    mut paths: Query<&mut Path>,
+    spoints: Query<&SPoint>,
+    sd: &ShapeData,
+    mpos: Vec2,
+) {
+    let path = match sd.shape {
+        CreateShape::Triangle => {
+            if sd.edges.len() == 1 {
+                let first_point = spoints.get(sd.edges[0]).unwrap().0;
+
+                let shape = shapes::Line(first_point, mpos);
+                ShapePath::build_as(&shape)
+            }
+            else if sd.edges.len() == 2 {
+                let fp = spoints.get(sd.edges[0]).unwrap().0;
+                let sp = spoints.get(sd.edges[1]).unwrap().0;
+
+                let shape = shapes::Polygon {
+                    points: Vec::from([fp, sp, mpos]),
+                    closed: true,
+                };
+                ShapePath::build_as(&shape)
+            }
+            else {
+                panic!("Triangle cannot have less than 1 edges or more than 2 during creation!: {:?}", sd);
+            }
+        },
+        CreateShape::Square => {
+            assert!(sd.edges.len() == 1);
+            let opposite_point = spoints.get(sd.edges[0]).unwrap().0;
+            let ext = (mpos - opposite_point).abs();
+            let center = mpos.min(opposite_point) + ext * 0.5;
+
+            let shape = shapes::Rectangle { extents: ext, origin: RectangleOrigin::CustomCenter(center) };
+            ShapePath::build_as(&shape)
+        },
+        CreateShape::SquareCenter => {
+            assert!(sd.center.is_some());
+            let center = spoints.get(sd.center.unwrap()).unwrap().0;
+            let ext = (mpos - center).abs() * 2.0;
+
+            let shape = shapes::Rectangle { extents: ext, origin: RectangleOrigin::CustomCenter(center) };
+            ShapePath::build_as(&shape)
+        },
+        CreateShape::Circle => {
+            assert!(sd.center.is_some());
+            let center= spoints.get(sd.center.unwrap()).unwrap().0;
+            
+            let shape = shapes::Circle { radius: (mpos - center).length(), center };
+            ShapePath::build_as(&shape)
+        },
+        CreateShape::Capsule => {
+            panic!("Capsule creation not implemented yet!");
+        },
+    };
+
+    if let Ok(mut p) = paths.get_mut(sd.main_shape) {
+        *p = path;
+    }
+}
+
+fn create_new_shape(coms: &mut Commands, pos: Vec2, create_shape: CreateShape) -> ShapeData {
+    // Shape draw mode...
+    let draw_mode = DrawMode::Outlined {
+        fill_mode: FillMode::color(Color::rgba(0.0, 0.5, 0.5, 0.4)),
+        outline_mode: StrokeMode::new(Color::rgba(0.0, 0.5, 0.5, 0.6), 3.0),
+    };
+
+    // Spawn the first point(where the user just clicked)
+    let shape = shapes::Circle {
+        radius: 3.0,
+        center: pos,
+    };
+    let fp = coms.spawn_bundle(GeometryBuilder::build_as(
+        &shape, 
+        DrawMode::Fill(FillMode::color(Color::RED)),
+        Transform::from_translation(Vec3::new(0.0, 0.0, 1.0))
+    ))
+    .insert(SPoint(pos))
+    .id();
+    // Spawn main shape!
+    let main_shape = match create_shape {
+        CreateShape::Triangle | CreateShape::Capsule => {
+            let shape = shapes::Line(pos, pos);
+            coms.spawn_bundle(GeometryBuilder::build_as(
+                &shape,
+                draw_mode,
+                Transform::from_translation(Vec3::ZERO)
+            )).id()
+        }, 
+        CreateShape::Square | CreateShape::SquareCenter => {
+            let shape = shapes::Rectangle { extents: Vec2::ZERO, origin: RectangleOrigin::CustomCenter(pos)};
+            coms.spawn_bundle(GeometryBuilder::build_as(
+                &shape,
+                draw_mode,
+                Transform::from_translation(Vec3::ZERO)
+            )).id()
+        },
+        CreateShape::Circle => {
+            let shape = shapes::Circle { radius: 0.0, center: pos };
+            coms.spawn_bundle(GeometryBuilder::build_as(
+                &shape,
+                draw_mode,
+                Transform::from_translation(Vec3::ZERO)
+            )).id()
+        },
+    };
+    // Get center point(if exists)
+    let center = match create_shape {
+        CreateShape::SquareCenter | CreateShape::Circle => Some(fp),
+        _ => None,
+    };
+    let edges = if center.is_none() { Vec::from([fp]) } else { Vec::new() };
+
+    ShapeData { shape: create_shape, main_shape, edges, center }
+}

src/helpers.rs

@@ -0,0 +1,19 @@
+use bevy::prelude::*;
+use crate::*;
+
+pub fn get_mouse_pos(q_cam: &Query<(&Camera, &GlobalTransform), With<MainCamera>>, wnds: &Windows) -> Option<Vec2> {
+    let (cam, cam_pos) = q_cam.get_single().expect("More than 1 MainCamera...");
+    let wnd = wnds.get_primary().expect("No window available???");
+    if let Some(screen_pos) = wnd.cursor_position() {
+        let w_size = Vec2::new(wnd.width() as f32, wnd.height() as f32);
+        let ndc = (screen_pos / w_size) * 2.0 - Vec2::ONE;
+        let ndc_to_world = cam_pos.compute_matrix() * cam.projection_matrix.inverse();
+        let world_pos = ndc_to_world.project_point3(ndc.extend(-1.0));
+        let world_pos: Vec2 = world_pos.truncate();
+        
+        Some(world_pos)
+    }
+    else {
+        None
+    }
+}

src/lib.rs

@@ -1,18 +1,64 @@
+use bevy::prelude::*;
 use bevy_egui::egui;
 
-#[derive(Debug)]
+mod create;
+mod helpers;
+pub use create::create_sys;
+pub use helpers::*;
+
+#[derive(Component, Debug, Clone, Copy)]
+pub struct SPoint(pub Vec2);
+
+#[derive(Component, Debug)]
+pub struct ShapeData {
+    pub shape: CreateShape,
+    pub main_shape: Entity,
+    pub edges: Vec<Entity>,
+    pub center: Option<Entity>,
+}
+
+#[derive(Component)]
+pub struct MainCamera;
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+pub enum CreateShape {
+    Triangle, Square, SquareCenter, Circle, Capsule
+}
+
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum Action {
     Create, Modify, Delete
 }
 pub struct UiState {
     pub current_action: Action,
-
+    pub create_shape: CreateShape,
 }
 impl Default for UiState {
     fn default() -> Self {
-        Self { current_action: Action::Modify }
+        Self { 
+            current_action: Action::Modify, 
+            create_shape: CreateShape::Square,
         }
     }
+}
+impl UiState {
+    pub fn create_shape_color(&self, colors: &ButtonsColors, shape: CreateShape) -> egui::Rgba {
+        if self.create_shape == shape {
+            colors.clicked
+        }
+        else {
+            colors.regular
+        }
+    }
+    pub fn current_action_color(&self, colors: &ButtonsColors, action: Action) -> egui::Rgba {
+        if self.current_action == action {
+            colors.clicked
+        }
+        else {
+            colors.regular
+        }
+    }
+}
+
 #[derive(Debug)]
 pub struct ButtonsColors {
     pub regular: egui::Rgba,

src/main.rs

@@ -1,3 +1,4 @@
+use bevy::ecs::schedule::ShouldRun;
 use bevy::{prelude::*, window::PresentMode, winit::WinitSettings};
 use bevy_egui::{egui, EguiContext, EguiPlugin};
 use bevy_prototype_lyon::prelude::*;
@@ -10,7 +11,9 @@ use shape_maker::*;
 /// - toggling hidpi scaling (by pressing '/' button);
 /// - configuring egui contexts during the startup.
 fn main() {
-    App::new()
+    let mut app = App::new();
+
+    app
         .insert_resource(ClearColor(Color::rgb(0.1, 0.1, 0.12)))
         .insert_resource(Msaa { samples: 4 })
         // Optimal power saving and present mode settings for desktop apps.
@@ -22,12 +25,33 @@ fn main() {
         })
         .insert_resource(ButtonsColors::default())
         .insert_resource(UiState::default())
+    ;
+
+    app
         .add_plugins(DefaultPlugins)
         .add_plugin(EguiPlugin)
         .add_plugin(ShapePlugin)
+    ;
+    app
         .add_startup_system(configure_visuals)
+        .add_startup_system(basic_setup_sys)
+        .add_system(create_sys.with_run_criteria(|state: Res<UiState>, mut ec: ResMut<EguiContext>| 
+            if !ec.ctx_mut().is_pointer_over_area() && state.current_action == Action::Create { ShouldRun::Yes } else { ShouldRun::No }
+        ))
+        .add_system(modify_sys.with_run_criteria(|state: Res<UiState>, mut ec: ResMut<EguiContext>| 
+            if !ec.ctx_mut().is_pointer_over_area() && state.current_action == Action::Modify { ShouldRun::Yes } else { ShouldRun::No }
+        ))
         .add_system(action_bar_sys)
-        .run();
+    ;
+    
+    app.run();
+}
+
+fn basic_setup_sys(
+    mut coms: Commands,
+) {
+    coms.spawn_bundle(OrthographicCameraBundle::new_2d())
+        .insert(MainCamera);
 }
 
 fn configure_visuals(mut egui_ctx: ResMut<EguiContext>) {
@@ -48,26 +72,75 @@ fn action_bar_sys(
         .resizable(false)
         .show(egui_ctx.ctx_mut(), |ui| {
             ui.horizontal(|hui| {
-                let modify_color = if let Action::Modify = state.current_action { colors.clicked } else { colors.regular };
-                let create_color = if let Action::Create = state.current_action { colors.clicked } else { colors.regular };
-                let delete_color = if let Action::Delete = state.current_action { colors.clicked } else { colors.regular };
-
-                if hui.button(egui::RichText::new("M").color(modify_color)).clicked() {
+                let m = hui.button(egui::RichText::new("M").color(state.current_action_color(&colors, Action::Modify)))
+                    .on_hover_text("Modify");
+                if m.clicked() {
                     state.current_action = Action::Modify;
                 }
-                if hui.button(egui::RichText::new("C").color(create_color)).clicked() {
+                let c = hui.button(egui::RichText::new("C").color(state.current_action_color(&colors, Action::Create)))
+                    .on_hover_text("Create");
+                if c.clicked() {
                     state.current_action = Action::Create;
                 }
-                if hui.button(egui::RichText::new("D").color(delete_color)).clicked() {
+                let d = hui.button(egui::RichText::new("D").color(state.current_action_color(&colors, Action::Delete)))
+                    .on_hover_text("Delete");
+                if d.clicked() {
                     state.current_action = Action::Delete;
                 }
                 hui.label(" | ");
 
-                if hui.button(" I ").clicked() {
-                    println!("Image loading is still not supported!");
+                if hui.button(" I ").on_hover_text("Import Image").clicked() {
+                    println!("Importing Images is still not supported!");
                 }
 
                 hui.label(": :");
             });
+
+            if state.current_action == Action::Create {
+                ui.horizontal(|hui| {
+                    let tri = hui.button(egui::RichText::new("Tri").color(state.create_shape_color(&colors, CreateShape::Triangle)))
+                        .on_hover_text("Triangle - from 3 edges");
+                    if tri.clicked() {
+                        state.create_shape = CreateShape::Triangle;
+                    }
+                    let squ = hui.button(egui::RichText::new("Squ").color(state.create_shape_color(&colors, CreateShape::Square)))
+                        .on_hover_text("Square - from 2 opposing edges");
+                    if squ.clicked() {
+                        state.create_shape = CreateShape::Square;
+                    }
+                    let sce = hui.button(egui::RichText::new("SqC").color(state.create_shape_color(&colors, CreateShape::SquareCenter)))
+                        .on_hover_text("Square - from center point and edge");
+                    if sce.clicked() {
+                        state.create_shape = CreateShape::SquareCenter;
+                    }
+                    let cir = hui.button(egui::RichText::new("Cir").color(state.create_shape_color(&colors, CreateShape::Circle)))
+                        .on_hover_text("Circle - center point and radius");
+                    if cir.clicked() {
+                        state.create_shape = CreateShape::Circle;
+                    }
+                    // let cap = hui.button(egui::RichText::new("Cap").color(state.create_shape_color(&colors, CreateShape::Capsule)))
+                    //     .on_hover_text("Capsule - from 2 center points and a radius");
+                    // if cap.clicked() {
+                    //     state.create_shape = CreateShape::Capsule;
+                    // }
                 });
             }
+        });
+}
+
+
+fn modify_sys(
+    mouse: Res<Input<MouseButton>>,
+    wnds: Res<Windows>,
+    q_cam: Query<(&Camera, &GlobalTransform), With<MainCamera>>,
+    mut paths: Query<&mut Path>,
+    mut transforms: Query<&mut Transform>,
+    shapes: Query<&ShapeData>,
+) {
+    let mouse_pos = get_mouse_pos(&q_cam, &wnds);
+
+    if let Some(mouse_pos) = mouse_pos {
+        
+    }
+}
+