feat: add shadow coloring

2026-09-19 20:50:17 +02:00
parent 7c347a5abf
commit 908c13bfb0
8 changed files with 290 additions and 44 deletions
@@ -0,0 +1,55 @@
+use std::f32::consts::PI;
+
+use bytemuck::{Pod, Zeroable};
+use egui::{Color32, Ui};
+
+/// Maximum number of simultaneous lights.
+pub const MAX_LIGHT_COUNT: usize = 16;
+
+#[derive(Clone, Copy, PartialEq, Zeroable, Pod)]
+#[repr(C)]
+pub struct Light {
+    pub azimuth: f32,
+    pub altitude: f32,
+    pub color: Color32,
+    pub _pad: u32,
+}
+
+impl Default for Light {
+    fn default() -> Self {
+        Self {
+            azimuth: PI / 4.,
+            altitude: PI / 4.,
+            color: Color32::WHITE,
+            _pad: 0,
+        }
+    }
+}
+
+impl Light {
+    pub fn widget(&mut self, ui: &mut Ui) -> bool {
+        let formater = |v, _| format!("{}°", ((v as f32 * 180. / PI) as u32));
+        ui.horizontal(|ui| {
+            let del = ui.button("-").clicked();
+            ui.label("color:");
+            ui.color_edit_button_srgba(&mut self.color);
+            ui.label("θ:");
+            ui.add(
+                egui::DragValue::new(&mut self.azimuth)
+                    .range(0.0..=PI * 2.)
+                    .custom_formatter(formater)
+                    .speed(0.02),
+            );
+            ui.label("φ:");
+            ui.add(
+                egui::DragValue::new(&mut self.altitude)
+                    .range(0.0..=PI / 2.)
+                    .custom_formatter(formater)
+                    .speed(0.02),
+            );
+
+            del
+        })
+        .inner
+    }
+}