Make it so icons can rotate

2 files changed, 67 insertions, 29 deletions

diff --git a/src/tool/deletion_tool.rs b/src/tool/deletion_tool.rs
index 24d239f..142e0cb 100644
--- a/src/tool/deletion_tool.rs
+++ b/src/tool/deletion_tool.rs
@@ -25,7 +25,9 @@ impl DeletionTool {
         map_data
             .walls_mut()
             .retain(|&(pos1, pos2)| !rect.contains(pos1) || !rect.contains(pos2));
-        map_data.icons_mut().retain(|&(_, pos)| !rect.contains(pos));
+        map_data
+            .icons_mut()
+            .retain(|icon| !rect.contains(icon.position));
     }
 }
 
@@ -51,7 +53,7 @@ impl Tool for DeletionTool {
         }
     }
 
-    fn draw(&self, map_data: &MapData, rld: &mut RaylibDrawHandle, transform: &Transform) {
+    fn draw(&self, _map_data: &MapData, rld: &mut RaylibDrawHandle, transform: &Transform) {
         if let Some((pos1, pos2)) = self.deletion_rect {
             let rect_px = transform.rect_m_to_px(Rect::bounding_rect(pos1, pos2));
             rld.draw_rectangle_rec(
diff --git a/src/tool/icon_tool.rs b/src/tool/icon_tool.rs
index 0ff1dc2..89a07e8 100644
--- a/src/tool/icon_tool.rs
+++ b/src/tool/icon_tool.rs
@@ -8,13 +8,13 @@ use raylib::core::texture::Texture2D;
 use raylib::ffi::{Color, KeyboardKey, MouseButton};
 use raylib::{RaylibHandle, RaylibThread};
 use ron::de::from_reader;
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use std::fs::{self, File};
 
 pub const ICON_DIR: &'static str = "assets/icons";
 
 #[derive(Deserialize)]
-struct IconInfo {
+struct IconFileInfo {
     /// The position the icon should be anchored in pixels. This is the Vector it will be moved by
     /// relative to the mouse pointer (to the left and up).
     anchor: Vec2<f32>,
@@ -22,14 +22,24 @@ struct IconInfo {
     pixels_per_m: f32,
 }
 
+#[derive(Serialize, Deserialize)]
+pub struct IconInfo {
+    /// The id of the icon is the icons position in the currently loaded icon_data vector.
+    pub icon_id: usize,
+    /// The position of the icon on the map, given by the vector in meters.
+    pub position: Vec2<f32>,
+    /// Rotation of the icon texture in degrees.
+    pub rotation: f32,
+}
+
 pub struct IconTool {
     // TODO: support svg
     /// The icon data, containing the image texture and the info for that image texture like the
     /// scale the image actually has.
-    icon_data: Vec<(Texture2D, IconInfo)>,
-    /// The currently active icon, defined by its position in the Vec.
-    active_icon: usize,
-    current_icon_pos: Option<Vec2<f32>>,
+    icon_data: Vec<(Texture2D, IconFileInfo)>,
+    /// The information of the icon that should be placed / is currently being placed, if it
+    /// exists.
+    current_icon: Option<IconInfo>,
 }
 
 impl IconTool {
@@ -70,7 +80,7 @@ impl IconTool {
             let mut file = file.path();
             file.set_extension("ron");
             let ron = File::open(file).expect("Could not read ron file for icon information.");
-            let icon_info: IconInfo =
+            let icon_info: IconFileInfo =
                 from_reader(ron).expect("Could not parse icon info from reader.");
 
             icon_data.push((texture, icon_info));
@@ -78,40 +88,61 @@ impl IconTool {
 
         Self {
             icon_data,
-            active_icon: 0,
-            current_icon_pos: None,
+            current_icon: None,
         }
     }
 }
 
 impl Tool for IconTool {
     fn active_update(&mut self, map: &mut MapData, rl: &RaylibHandle, transform: &Transform) {
-        // Put the currently active icon to where it would be placed.
-        self.current_icon_pos = Some(snap_to_grid(
-            transform.point_px_to_m(rl.get_mouse_position().into()),
-            0.5,
-        ));
+        // Update the position of the icon that should be drawn to the current mouse position, or
+        // create a new default icon if there was `None`.
+        let snapped_mouse_pos_m =
+            snap_to_grid(transform.point_px_to_m(rl.get_mouse_position().into()), 0.5);
+        self.current_icon = match self.current_icon.take() {
+            Some(mut icon) => {
+                icon.position = snapped_mouse_pos_m;
+                Some(icon)
+            }
+            None => Some(IconInfo {
+                icon_id: 0,
+                position: snapped_mouse_pos_m,
+                rotation: 0.,
+            }),
+        };
 
-        // Activate the next icon when pressing the icon tool key.
-        if rl.is_key_pressed(KeyboardKey::KEY_I) {
-            self.active_icon = (self.active_icon + 1) % self.icon_data.len();
+        {
+            // Unwrap the current icon, since it is now definitely set, as we are in the active update.
+            let active_icon = self.current_icon.as_mut().unwrap();
+            // Activate the next icon when pressing the icon tool key.
+            if rl.is_key_pressed(KeyboardKey::KEY_I) {
+                active_icon.icon_id = (active_icon.icon_id + 1) % self.icon_data.len();
+            }
+            if rl.is_mouse_button_pressed(MouseButton::MOUSE_RIGHT_BUTTON) {
+                // Rotate the currently active icon by a quarter rotation.
+                active_icon.rotation += 45.;
+            }
         }
 
         // Handle placing the icon on the map
         if rl.is_mouse_button_pressed(MouseButton::MOUSE_LEFT_BUTTON) {
-            map.icons_mut()
-                .push((self.active_icon, self.current_icon_pos.unwrap()));
+            map.icons_mut().push(self.current_icon.take().unwrap());
         }
     }
 
     fn draw(&self, map: &MapData, rld: &mut RaylibDrawHandle, transform: &Transform) {
         // Draw all icons that have been placed on the map.
-        for (icon, pos) in map.icons() {
-            let (texture, info) = &self.icon_data[*icon];
+        for icon in map.icons() {
+            let (texture, info) = &self.icon_data[icon.icon_id];
+            // Round the position to whole pixels to fix rotation problems.
+            let mut position_px =
+                transform.point_m_to_px(icon.position - (info.anchor / info.pixels_per_m));
+            position_px.x = position_px.x as i32 as f32;
+            position_px.y = position_px.y as i32 as f32;
             rld.draw_texture_ex(
                 texture,
-                transform.point_m_to_px(*pos - (info.anchor / info.pixels_per_m)),
-                0.,
+                position_px,
+                icon.rotation,
                 transform.pixels_per_m() / info.pixels_per_m,
                 Color {
                     r: 255,
@@ -123,12 +154,17 @@ impl Tool for IconTool {
         }
 
         // Draw the icon that would be placed
-        if let Some(current_icon_pos) = self.current_icon_pos {
-            let (texture, info) = &self.icon_data[self.active_icon];
+        if let Some(current_icon) = &self.current_icon {
+            let (texture, info) = &self.icon_data[current_icon.icon_id];
+            // Round the position to whole pixels to fix rotation problems.
+            let mut position_px =
+                transform.point_m_to_px(current_icon.position - (info.anchor / info.pixels_per_m));
+            position_px.x = position_px.x as i32 as f32;
+            position_px.y = position_px.y as i32 as f32;
             rld.draw_texture_ex(
                 texture,
-                transform.point_m_to_px(current_icon_pos - (info.anchor / info.pixels_per_m)),
-                0.,
+                position_px,
+                current_icon.rotation,
                 transform.pixels_per_m() / info.pixels_per_m,
                 Color {
                     r: 120,