3D isometric renderer: chunked meshes with noise-displaced walls, lit shader with flickering torches, billboard sprites, rotatable/tiltable ortho camera, ray picking

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui.rs

@@ -3,7 +3,7 @@
 use crate::game::*;
 use crate::gfx::*;
 use crate::map::*;
-use crate::render::{minimap_color, View};
+use crate::render3d::{minimap_color, Cam};
 use crate::sound::SoundBank;
 use macroquad::prelude::*;
 
@@ -49,7 +49,7 @@ pub const TOOLS: [Tool; 12] = [
     Tool::Summon,
 ];
 
-pub const TOOL_KEYS: [&str; 12] = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "Q", "E"];
+pub const TOOL_KEYS: [&str; 12] = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "X", "V"];
 
 pub struct ToolInfo {
     pub label: &'static str,
@@ -198,7 +198,7 @@ impl Ui {
         UiAction::None
     }
 
-    pub fn draw(&mut self, g: &Game, gfx: &Gfx, view: &View, snd: &SoundBank, info: &[(String, Color)], now: f64) {
+    pub fn draw(&mut self, g: &Game, gfx: &Gfx, cam: &Cam, snd: &SoundBank, info: &[(String, Color)], now: f64) {
         self.rects.clear();
         let sw = screen_width();
         let sh = screen_height();
@@ -325,10 +325,15 @@ impl Ui {
             let (fx, fy) = xy(f);
             draw_rectangle(mrx + fx as f32 * ms - 2.0, mry + fy as f32 * ms - 2.0, 5.0, 5.0, RED);
         }
-        // Kamerarahmen
-        let vw = sw / view.zoom * ms;
-        let vh = sh / view.zoom * ms;
-        draw_rectangle_lines(mrx + view.cam_x * ms, mry + view.cam_y * ms, vw, vh, 1.5, WHITE);
+        // camera footprint on the ground
+        let corners = [cam.ground_point(0.0, 0.0), cam.ground_point(sw, 0.0), cam.ground_point(sw, sh), cam.ground_point(0.0, sh)];
+        for k in 0..4 {
+            let a = corners[k];
+            let b = corners[(k + 1) % 4];
+            let clampp = |p: Vec2| vec2(mrx + p.x.clamp(0.0, MW as f32) * ms, mry + p.y.clamp(0.0, MH as f32) * ms);
+            let (pa, pb) = (clampp(a), clampp(b));
+            draw_line(pa.x, pa.y, pb.x, pb.y, 1.5, WHITE);
+        }
 
         // ---------------- Infofeld
         if !info.is_empty() {
@@ -415,8 +420,9 @@ impl Ui {
             ("Linksklick       Werkzeug benutzen (Graben/Räume: Rechteck ziehen)", TXT),
             ("Rechtsklick      Einheit aus der Hand absetzen", TXT),
             ("Rechts ziehen    Karte verschieben (auch WASD/Pfeile, Bildrand)", TXT),
+            ("Mitte ziehen     Kamera drehen und neigen (auch Q/E, R/F)", TXT),
             ("Mausrad          Zoomen", TXT),
-            ("1-9, 0, Q, E     Werkzeug wählen", TXT),
+            ("1-9, 0, X, V     Werkzeug wählen", TXT),
             ("P / Leertaste    Pause      M  Ton an/aus   +/-  Lautstärke", TXT),
             ("H                Diese Hilfe", TXT),
             ("", TXT),
@@ -475,9 +481,9 @@ impl Ui {
 }
 
 // Infotext für Einheit oder Kachel unter dem Mauszeiger (erste Zeile = Titel)
-pub fn hover_info(g: &Game, wx: f32, wy: f32) -> Vec<(String, Color)> {
+pub fn hover_info(g: &Game, ent: Option<usize>, tile: Option<(i32, i32)>) -> Vec<(String, Color)> {
     let mut out = Vec::new();
-    if let Some(j) = g.ent_at(wx, wy, false) {
+    if let Some(j) = ent {
         let e = &g.ents[j];
         let s = st(e.kind);
         out.push((format!("{} (Stufe {})", s.name, e.level), if e.hero { BLUE } else { FRAME_HI }));
@@ -502,7 +508,7 @@ pub fn hover_info(g: &Game, wx: f32, wy: f32) -> Vec<(String, Color)> {
         }
         return out;
     }
-    let (x, y) = (wx.floor() as i32, wy.floor() as i32);
+    let Some((x, y)) = tile else { return out };
     let Some(t) = g.map.get(x, y) else { return out };
     let owner = match t.owner {
         Owner::Player => "erobert",