Alpha for textures

protocols/schemas/shapes.prs

@@ -20,6 +20,7 @@ Rotate = @euler <rotate @v Vector3 @shape Shape> / @quaternion <rotate @q Quater
 Texture =
 / @simple <texture @path string @shape Shape>
 / @uv <texture @path string @scale Vector2 @offset Vector2 @shape Shape>
+/ @uvAlpha <texture @path string @scale Vector2 @offset Vector2 @alpha double @shape Shape>
 .
 
 Color =

scene/example.pr

@@ -8,8 +8,13 @@
   <floor <ground <v 30.0 30.0>>>>>
 
 <sprite "box"
- <move <v 1.0 1.5 3.0>
-  <texture "textures/grass-256x256.jpg" <floor <box>>>>>
+ <move <v 6.0 2.5 8.0>
+  <scale <v 10.0 0.1 10.0>
+   <texture "textures/oak-herringbone-5e80fb40b00c9-1200.jpg"
+    <v 0.1 0.1>
+    <v 0.0 0.0>
+    0.75
+    <floor <box>>>>>>
 
 <sprite "box2"
  <move <v -1.0 0.5 3.0>

src/shapes.ts

@@ -194,6 +194,9 @@ export function build(name: string, scene: Scene, shape: Shapes.Shape, customize
             switch (shape.value._variant) {
                 case "simple":
                     break;
+                case "uvAlpha":
+                    mat.alpha = shape.value.alpha;
+                    /* FALL THROUGH */
                 case "uv": {
                     const scale = v2(shape.value.scale);
                     const offset = v2(shape.value.offset);