Fix commit

* HiPS3D in fits black artifact removed
* accepts fits ext files when searching for a FITS image to display

src/core/al-core/src/texture/3d.rs

@@ -58,11 +58,20 @@ impl Texture3D {
             pixel_type: F::PIXEL_TYPE,
         })));
 
-        Ok(Texture3D {
+        let s = Texture3D {
             texture,
             gl: gl.clone(),
             metadata,
-        })
+        };
+        let voxel_count = F::NUM_CHANNELS * (width as usize) * (height as usize) * (depth as usize);
+        let zeros = vec![0xff; voxel_count as usize];
+        s.bind().tex_sub_image_3d_with_opt_u8_array(0, 0, 0,
+            width,
+            height,
+            depth,
+            Some(&zeros[..])
+        );
+        Ok(s)
     }
 
     pub fn generate_mipmap(&self) {

src/core/src/app.rs

@@ -256,6 +256,9 @@ impl App {
 
         // 🚨 VERY IMPORTANT: prevent the closure from being dropped
         onmessage.forget();
+
+        gl.blend_func(WebGl2RenderingContext::SRC_ALPHA, WebGl2RenderingContext::ONE_MINUS_SRC_ALPHA);
+
         Ok(App {
             gl,
             //ui,

src/core/src/renderable/hips/mod.rs

@@ -19,17 +19,6 @@ use wasm_bindgen::JsValue;
 
 mod subdivide;
 
-/*
-pub(crate) trait HpxTile {
-    // Getter
-    // Returns the current time if the texture is not full
-    fn start_time(&self) -> Time;
-
-    fn time_request(&self) -> Time;
-
-    fn cell(&self) -> &HEALPixCell;
-}*/
-
 pub(crate) trait HpxTileBuffer {
     type T;
     type C;

src/glsl/webgl2/fits/color.glsl

@@ -21,7 +21,7 @@ vec4 val2c_f32(float x) {
     // apply reversed
     alpha = mix(alpha, 1.0 - alpha, reversed);
 
-    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(isinf(x)));
+    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(isinf(x) || isnan(x)));
     return apply_tonal(new_color);
 }
 
@@ -32,7 +32,7 @@ vec4 val2c(float x) {
     // apply reversed
     alpha = mix(alpha, 1.0 - alpha, reversed);
 
-    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(x == blank || isnan(x)));
+    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(x == blank));
     return apply_tonal(new_color);
 }
 

src/glsl/webgl2/hips/color.glsl

@@ -74,7 +74,7 @@ vec4 val2c_f32(float x) {
     // apply reversed
     alpha = mix(alpha, 1.0 - alpha, reversed);
 
-    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(isinf(x)));
+    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(isinf(x) || isnan(x)));
     return apply_tonal(new_color);
 }
 
@@ -85,7 +85,7 @@ vec4 val2c(float x) {
     // apply reversed
     alpha = mix(alpha, 1.0 - alpha, reversed);
 
-    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(x == blank || isnan(x)));
+    vec4 new_color = mix(colormap_f(alpha), vec4(0.0), float(x == blank));
     return apply_tonal(new_color);
 }
 
@@ -96,12 +96,12 @@ vec4 uvw2c_f32(vec3 uv) {
 
 vec4 uvw2c_i32(vec3 uv) {
     float val = float(decode_i32(texture(tex, uv).rgba));
-    return val2c(val);
+    return mix(val2c(val), vec4(0.0), float(val == -1.0));
 }
 
 vec4 uvw2c_i16(vec3 uv) {
     float val = float(decode_i16(texture(tex, uv).rg));
-    return val2c(val);
+    return mix(val2c(val), vec4(0.0), float(val == -1.0));
 }
 
 vec4 uvw2c_u8(vec3 uv) {

src/js/DefaultActionsForContextMenu.js

@@ -129,6 +129,7 @@ export let DefaultActionsForContextMenu = (function () {
                         label: 'FITS image', action(o) {
                             let input = document.createElement('input');
                             input.type = 'file';
+                            input.accept = ".fits";
                             input.onchange = _ => {
                                 let files = Array.from(input.files);