Add docs for floating window shadow configuration and remove under sp…

…ecified variables

src/renderer/mod.rs

@@ -49,8 +49,6 @@ pub struct RendererSettings {
     floating_z_height: f32,
     light_angle_degrees: f32,
     light_radius: f32,
-    shadow_ambient: f32,
-    shadow_spot: f32,
     debug_renderer: bool,
     profiler: bool,
     underline_automatic_scaling: bool,
@@ -69,8 +67,6 @@ impl Default for RendererSettings {
             floating_z_height: 10.,
             light_angle_degrees: 45.,
             light_radius: 5.,
-            shadow_ambient: 0.03,
-            shadow_spot: 0.35,
             debug_renderer: false,
             profiler: false,
             underline_automatic_scaling: false,

src/renderer/rendered_window.rs

@@ -305,8 +305,8 @@ impl RenderedWindow {
                 Point3::new(0., -light_angle_radians.sin(), light_angle_radians.cos()),
                 // This is roughly equal to the apparent radius of the light .
                 5.,
-                Color::from_argb((settings.shadow_ambient * 255.) as u8, 0, 0, 0),
-                Color::from_argb((settings.shadow_spot * 255.) as u8, 0, 0, 0),
+                Color::from_argb((0.03 * 255.) as u8, 0, 0, 0),
+                Color::from_argb((0.35 * 255.) as u8, 0, 0, 0),
                 // Directional Light flag is necessary to make the shadow render consistently
                 // across varius sizes of floating windows. It effects how the light direction is
                 // processed.

website/docs/configuration.md

@@ -199,6 +199,34 @@ vim.g.neovide_floating_blur_amount_y = 2.0
 Setting `g:neovide_floating_blur_amount_x` and `g:neovide_floating_blur_amount_y` controls the blur
 radius on the respective axis for floating windows.
 
+#### Floating Shadow
+
+VimScript:
+
+```vim
+let g:neovide_floating_shadow = v:true
+let g:neovide_floating_z_height = 10
+let g:neovide_light_angle_degrees = 45
+let g:neovide_light_radius = 5
+```
+
+Lua:
+
+```lua
+vim.g.neovide_floating_shadow = v:true
+vim.g.neovide_floating_z_height = 10
+vim.g.neovide_light_angle_degrees = 45
+vim.g.neovide_light_radius = 5
+```
+
+**Available since 0.12.**
+
+Setting `g:neovide_floating_shadow` to false will disable the shadow borders for floating windows.
+The other variables configure the shadow in various ways:
+- `g:neovide_floating_z_height` sets the virtual height of the floating window from the ground plane
+- `g:neovide_light_angle_degrees` sets the angle from the screen normal of the casting light
+- `g:neovide_light_radius` sets the radius of the casting light
+
 #### Transparency
 
 VimScript: