Add panning, zooming, and info box

011cd40da8b4a8ae3324d1b0cf6f216641d44225

Cargo.lock

@@ -427,6 +427,15 @@ dependencies = [
  "glam",
 ]
 
+[[package]]
+name = "bevy_pancam"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ebc698de3f4e824a67f517fe9cca35f08d5fdaab99ed8e141102c582768fc62"
+dependencies = [
+ "bevy",
+]
+
 [[package]]
 name = "bevy_pbr"
 version = "0.8.1"
@@ -2645,6 +2654,7 @@ name = "worlds-sim-rust"
 version = "0.1.0"
 dependencies = [
  "bevy",
+ "bevy_pancam",
  "save",
 ]
 

Cargo.toml

@@ -6,7 +6,7 @@ resolver = "2"
 
 [features]
 debug = ["save/debug"]
-render = ["bevy/bevy_asset", "bevy/bevy_winit", "bevy/render", "save/render"]
+render = ["bevy/bevy_asset", "bevy/bevy_winit", "bevy/render", "save/render", "dep:bevy_pancam"]
 default = ["render", "debug"]
 
 [dependencies.save]
@@ -15,3 +15,7 @@ path = "save"
 [dependencies.bevy]
 version = "0.8"
 default-features = false
+
+[dependencies.bevy_pancam]
+version = "0.6.1"
+optional = true

save/src/world.rs

@@ -4,7 +4,9 @@ use std::{
     fmt::{Debug, Display},
 };
 
-use bevy::{math::Vec3A, prelude::Vec2, utils::default};
+// TODO: Logging doesn't seem to work here? Figure out why and fix
+
+use bevy::{log::info, math::Vec3A, prelude::Vec2, utils::default};
 use noise::{NoiseFn, Perlin, Seedable};
 use rand::Rng;
 
@@ -145,11 +147,14 @@ impl World {
     }
 
     fn generate_continents(&mut self) {
+        info!("Generating continents");
         let mut rng = rand::thread_rng();
         let width = self.width as f32;
         let height = self.height as f32;
 
         for i in 0..Self::NUM_CONTINENTS {
+            info!("{}/{}", i, Self::NUM_CONTINENTS);
+
             self.continent_offsets[i as usize].x = rng
                 .gen_range(width * i as f32 * 2.0 / 5.0..width * (i as f32 + 2.0) * 2.0 / 5.0)
                 .repeat(width);
@@ -159,6 +164,7 @@ impl World {
             self.continent_widths[i as usize] =
                 rng.gen_range(Self::CONTINENT_MIN_WIDTH_FACTOR..Self::CONTINENT_MAX_WIDTH_FACTOR);
         }
+        info!("Done generating continents");
     }
 
     fn continent_modifier(&self, x: usize, y: usize) -> f32 {
@@ -195,6 +201,7 @@ impl World {
     }
 
     fn generate_altitude(&mut self) -> Result<(), CartesianError> {
+        info!("Generating altitude");
         self.generate_continents();
 
         const RADIUS_1: f32 = 0.5;
@@ -212,6 +219,8 @@ impl World {
         for y in 0..self.terrain.len() {
             let alpha = (y as f32 / self.height as f32) * PI;
 
+            info!("{}/{}", y, self.terrain.len());
+
             for x in 0..self.terrain[y].len() {
                 let beta = (x as f32 / self.width as f32) * TAU;
 
@@ -250,6 +259,7 @@ impl World {
                 self.terrain[y][x].altitude = Self::calculate_altitude(raw_altitude);
             }
         }
+        info!("Done generating altitude");
         Ok(())
     }
 

save/src/world_manager.rs

@@ -67,6 +67,9 @@ impl WorldManager {
     pub fn get_world(&self) -> Option<&World> {
         self.world.as_ref()
     }
+    pub fn world(&self) -> &World {
+        self.get_world().unwrap()
+    }
 
     pub fn new_world(&mut self) -> Result<&World, WorldGenError> {
         let seed = random();
@@ -142,7 +145,7 @@ impl WorldManager {
             let mut shade_value = 1.0;
 
             while shade_value > altitude / World::MAX_ALTITUDE {
-                shade_value -= 0.1;
+                shade_value -= 0.05;
             }
 
             Color::rgb(shade_value, shade_value, shade_value)

src/main.rs

@@ -32,7 +32,9 @@
 #![warn(unused_results)]
 #![warn(variant_size_differences)]
 
-mod world_plugins;
+mod plugins;
+
+use std::fmt::Display;
 
 use bevy::{
     app::App,
@@ -42,7 +44,7 @@ use bevy::{
 #[cfg(feature = "render")]
 use bevy::{
     asset::{AssetServer, Assets},
-    core_pipeline::core_2d::Camera2dBundle,
+    core_pipeline::core_2d::{Camera2d, Camera2dBundle},
     ecs::{
         change_detection::ResMut,
         component::Component,
@@ -50,24 +52,31 @@ use bevy::{
         system::{Commands, Query, Res},
     },
     hierarchy::BuildChildren,
+    prelude::Vec2,
     render::{
+        camera::{Camera, RenderTarget},
         color::Color,
         render_resource::{
             Extent3d, TextureDescriptor, TextureDimension, TextureFormat, TextureUsages,
         },
         texture::{Image, ImageSettings},
     },
+    sprite::{Sprite, SpriteBundle},
+    text::Text,
+    transform::components::GlobalTransform,
     ui::{
-        entity::{ButtonBundle, ImageBundle, NodeBundle, TextBundle},
+        entity::{ButtonBundle, NodeBundle, TextBundle},
         widget::Button,
         AlignItems, FocusPolicy, Interaction, JustifyContent, PositionType, Size, Style, UiColor,
-        UiImage, UiRect, Val,
+        UiRect, Val,
     },
     utils::default,
     window::{CursorIcon, WindowDescriptor, Windows},
     winit::WinitSettings,
 };
-use world_plugins::WorldPlugins;
+#[cfg(feature = "render")]
+use plugins::PanCam;
+use plugins::WorldPlugins;
 use save::*;
 
 #[cfg(feature = "render")]
@@ -78,17 +87,33 @@ fn refresh_world_texture(images: &mut Assets<Image>, world_manager: &WorldManage
 }
 
 #[cfg(feature = "render")]
-#[derive(Component, Default)]
+#[derive(Component)]
 struct RainfallButton;
 
 #[cfg(feature = "render")]
-#[derive(Component, Default)]
+#[derive(Component)]
 struct TemperatureButton;
 
 #[cfg(feature = "render")]
-#[derive(Component, Default)]
+#[derive(Component)]
 struct ContoursButton;
 
+#[cfg(feature = "render")]
+#[derive(Component)]
+struct InfoPanel;
+
+#[cfg(feature = "render")]
+#[derive(Default, Debug)]
+struct CursorMapPosition {
+    x: i32,
+    y: i32,
+}
+impl Display for CursorMapPosition {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_fmt(format_args!("x: {}, y: {}", self.x, self.y))
+    }
+}
+
 const NORMAL_BUTTON: Color = Color::rgb(0.15, 0.15, 0.15);
 const HOVERED_BUTTON: Color = Color::rgb(0.25, 0.25, 0.25);
 const PRESSED_BUTTON: Color = Color::rgb(0.35, 0.60, 0.35);
@@ -191,6 +216,59 @@ fn handle_contours_button(
     }
 }
 
+#[cfg(feature = "render")]
+fn update_cursor_map_position(
+    mut cursor_map_position: ResMut<'_, CursorMapPosition>,
+    transform: Query<'_, '_, (&Camera, &GlobalTransform), With<Camera2d>>,
+    windows: Res<'_, Windows>,
+    world_manager: Res<'_, WorldManager>,
+) {
+    let (camera, transform) = transform.single();
+
+    let window = match camera.target {
+        RenderTarget::Window(window_id) => windows.get(window_id).unwrap(),
+        RenderTarget::Image(_) => windows.primary(),
+    };
+
+    if let Some(screen_position) = window.cursor_position() {
+        let window_size = Vec2::new(window.width(), window.height());
+
+        // GPU coordinates [-1..1]
+        let ndc = (screen_position / window_size) * 2.0;
+
+        // Matrix to reverse camera transform
+        let ndc_to_world = transform.compute_matrix() * camera.projection_matrix().inverse();
+
+        let world_position =
+            ndc_to_world.project_point3(ndc.extend(-1.0)).truncate() / WORLD_SCALE as f32;
+
+        cursor_map_position.x = world_position.x.round() as i32;
+        cursor_map_position.y = world_manager.world().height - world_position.y.round() as i32;
+    }
+}
+
+#[cfg(feature = "render")]
+fn update_info_panel(
+    cursor_position: Res<'_, CursorMapPosition>,
+    world_manager: Res<'_, WorldManager>,
+    mut text: Query<'_, '_, &mut Text, With<InfoPanel>>,
+) {
+    let world = world_manager.world();
+    text.single_mut().sections[0].value = if cursor_position.x >= 0
+        && cursor_position.x < world.width
+        && cursor_position.y >= 0
+        && cursor_position.y < world.height
+    {
+        let cell = &world.terrain[cursor_position.y as usize][cursor_position.x as usize];
+        format!(
+            "Mouse position: {}\nAltitude: {}\nRainfall: {}\nTemperature: {}",
+            *cursor_position, cell.altitude, cell.rainfall, cell.temperature
+        )
+    } else {
+        format!("Mouse position: {}\nOut of bounds", *cursor_position)
+    };
+}
+
 #[cfg(feature = "render")]
 fn generate_graphics(
     mut commands: Commands<'_, '_>,
@@ -198,7 +276,13 @@ fn generate_graphics(
     mut world_manager: ResMut<'_, WorldManager>,
     asset_server: Res<'_, AssetServer>,
 ) {
-    let world = world_manager.get_world().unwrap();
+    use bevy::ui::AlignSelf;
+
+    let world = world_manager.world();
+    let custom_sprite_size = Vec2 {
+        x: (WORLD_SCALE * world.width) as f32,
+        y: (WORLD_SCALE * world.height) as f32,
+    };
 
     let image_handle = images.add(Image {
         data: world_manager.world_color_bytes(),
@@ -219,7 +303,17 @@ fn generate_graphics(
     });
     world_manager.image_handle_id = image_handle.id;
 
-    _ = commands.spawn_bundle(Camera2dBundle::default());
+    _ = commands
+        .spawn_bundle(Camera2dBundle::default())
+        .insert(PanCam::default());
+    _ = commands.spawn_bundle(SpriteBundle {
+        texture: images.get_handle(world_manager.image_handle_id),
+        sprite: Sprite {
+            custom_size: Some(custom_sprite_size),
+            ..default()
+        },
+        ..default()
+    });
     _ = commands
         .spawn_bundle(NodeBundle {
             style: Style {
@@ -230,15 +324,33 @@ fn generate_graphics(
             ..default()
         })
         .with_children(|root_node| {
-            _ = root_node.spawn_bundle(ImageBundle {
+            _ = root_node
+                .spawn_bundle(NodeBundle {
                     style: Style {
-                    size: Size::new(Val::Percent(100.0), Val::Auto),
+                        // align_items: AlignItems::FlexEnd,
+                        align_self: AlignSelf::FlexEnd,
+                        padding: UiRect::all(Val::Px(2.0)),
                         ..default()
                     },
-                image: UiImage(image_handle),
+                    color: Color::rgba(1.0, 1.0, 1.0, 0.05).into(),
+                    focus_policy: FocusPolicy::Pass,
                     ..default()
+                })
+                .with_children(|info_panel| {
+                    _ = info_panel
+                        .spawn_bundle(TextBundle {
+                            text: Text::from_section(
+                                "Info Panel",
+                                bevy::text::TextStyle {
+                                    font: asset_server.load("JuliaMono.ttf"),
+                                    font_size: 15.0,
+                                    color: Color::WHITE,
+                                },
+                            ),
+                            ..default()
+                        })
+                        .insert(InfoPanel);
                 });
-
             _ = root_node
                 .spawn_bundle(NodeBundle {
                     style: Style {
@@ -264,7 +376,7 @@ fn generate_graphics(
                             color: NORMAL_BUTTON.into(),
                             ..default()
                         })
-                        .insert(RainfallButton::default())
+                        .insert(RainfallButton)
                         .with_children(|button| {
                             _ = button.spawn_bundle(TextBundle {
                                 text: bevy::text::Text::from_section(
@@ -289,7 +401,7 @@ fn generate_graphics(
                             color: NORMAL_BUTTON.into(),
                             ..default()
                         })
-                        .insert(TemperatureButton::default())
+                        .insert(TemperatureButton)
                         .with_children(|button| {
                             _ = button.spawn_bundle(TextBundle {
                                 text: bevy::text::Text::from_section(
@@ -314,7 +426,7 @@ fn generate_graphics(
                             color: NORMAL_BUTTON.into(),
                             ..default()
                         })
-                        .insert(ContoursButton::default())
+                        .insert(ContoursButton)
                         .with_children(|button| {
                             _ = button.spawn_bundle(TextBundle {
                                 text: bevy::text::Text::from_section(
@@ -332,6 +444,7 @@ fn generate_graphics(
         });
 }
 
+const WORLD_SCALE: i32 = 3;
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut app = App::new();
     let mut manager = WorldManager::new();
@@ -344,16 +457,19 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             // Use nearest-neighbor rendering for cripsier pixels
             .insert_resource(ImageSettings::default_nearest())
             .insert_resource(WindowDescriptor {
-                width: (2 * world.width) as f32,
+                width: (WORLD_SCALE * world.width) as f32,
-                height: (2 * world.height) as f32,
+                height: (WORLD_SCALE * world.height) as f32,
                 title: String::from("World-RS"),
                 resizable: true,
                 ..default()
             })
+            .insert_resource(CursorMapPosition::default())
             .add_startup_system(generate_graphics)
             .add_system(handle_rainfall_button)
             .add_system(handle_temperature_button)
-            .add_system(handle_contours_button);
+            .add_system(handle_contours_button)
+            .add_system(update_cursor_map_position)
+            .add_system(update_info_panel);
     }
     #[cfg(not(feature = "render"))]
     {
@@ -375,7 +491,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         });
     }
 
-    app.insert_resource(manager).add_plugins(WorldPlugins).run();
+    app.add_plugins(WorldPlugins).insert_resource(manager).run();
 
     Ok(())
 }

src/plugins/mod.rs

@@ -0,0 +1,4 @@
+pub(crate) mod world_plugins;
+pub(crate) use world_plugins::WorldPlugins;
+
+pub(crate) use bevy_pancam::PanCam;

src/plugins/world_plugins.rs

@@ -22,6 +22,8 @@ impl PluginGroup for WorldPlugins {
                 input::InputPlugin, render::RenderPlugin, sprite::SpritePlugin, text::TextPlugin,
                 transform::TransformPlugin, ui::UiPlugin, window::WindowPlugin, winit::WinitPlugin,
             };
+            use bevy_pancam::PanCamPlugin;
+
             _ = group
                 .add(TransformPlugin::default())
                 // hierarchy
@@ -34,7 +36,8 @@ impl PluginGroup for WorldPlugins {
                 .add(CorePipelinePlugin::default())
                 .add(SpritePlugin::default())
                 .add(TextPlugin::default())
-                .add(UiPlugin::default());
+                .add(UiPlugin::default())
+                .add(PanCamPlugin::default());
         }
         #[cfg(not(feature = "render"))]
         {