Stop using illegal negative values for `wgpu::SamplerDescriptor::lod_min_clamp`.

WebGPU valid usage states `lodMinClamp` must not be negative, and `lodMaxClamp` must be >= `lodMinClamp`

code/beginner/tutorial8-depth/src/texture.rs

@@ -41,7 +41,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/beginner/tutorial9-models/src/texture.rs

@@ -40,7 +40,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/intermediate/tutorial10-lighting/src/texture.rs

@@ -40,7 +40,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/intermediate/tutorial11-normals/src/texture.rs

@@ -40,7 +40,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/intermediate/tutorial12-camera/src/texture.rs

@@ -40,7 +40,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/intermediate/tutorial13-terrain/src/texture.rs

@@ -40,7 +40,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/showcase/compute/src/texture.rs

@@ -54,7 +54,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/showcase/framework/src/texture.rs

@@ -38,7 +38,7 @@ impl<'a> Texture<'a> {
             mag_filter: wgpu::FilterMode::Linear,
             min_filter: wgpu::FilterMode::Nearest,
             mipmap_filter: wgpu::FilterMode::Nearest,
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             compare: Some(wgpu::CompareFunction::LessEqual),
             ..Default::default()
@@ -117,7 +117,7 @@ impl<'a> Texture<'a> {
             mag_filter: wgpu::FilterMode::Linear,
             min_filter: wgpu::FilterMode::Nearest,
             mipmap_filter: wgpu::FilterMode::Nearest,
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             compare: Some(wgpu::CompareFunction::Always),
             ..Default::default()

code/showcase/mouse-picking/src/texture.rs

@@ -40,7 +40,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

code/showcase/threading/src/texture.rs

@@ -40,7 +40,7 @@ impl Texture {
             min_filter: wgpu::FilterMode::Linear,
             mipmap_filter: wgpu::FilterMode::Nearest,
             compare: Some(wgpu::CompareFunction::LessEqual),
-            lod_min_clamp: -100.0,
+            lod_min_clamp: 0.0,
             lod_max_clamp: 100.0,
             ..Default::default()
         });

docs/beginner/tutorial8-depth/README.md

@@ -54,7 +54,7 @@ impl Texture {
                 min_filter: wgpu::FilterMode::Linear,
                 mipmap_filter: wgpu::FilterMode::Nearest,
                 compare: Some(wgpu::CompareFunction::LessEqual), // 5.
-                lod_min_clamp: -100.0,
+                lod_min_clamp: 0.0,
                 lod_max_clamp: 100.0,
                 ..Default::default()
             }