WIP add transparency parameter to differentiate scene and object texts

Author: shensquared

src/meshcat/commands.py

@@ -46,9 +46,12 @@ def __init__(self, text, geometry_or_object, material=None, path=[]):
         else:
             if geometry_or_object is None:
                 geometry_or_object = Plane()
+                # if writing onto the scene, default material is transparent
+                material = MeshPhongMaterial(map=self.text_texture,
+                   needsUpdate=True, opacity = 0.0)
             if material is None:
-                material = MeshPhongMaterial(
-                    map=self.text_texture, needsUpdate=True)
+                material = MeshPhongMaterial(map=self.text_texture,
+                   needsUpdate=True)
             if isinstance(material, PointsMaterial):
                 raise(ArgumentError(
                     "Cannot write text onto points; please supply a mesh material"))

src/meshcat/geometry.py

@@ -164,7 +164,7 @@ def lower(self, object_data):
 #              u"height": self.height,
 #             u"curveSegments": self.curveSegments
 #          }
- 
+
 
 
 
@@ -220,11 +220,13 @@ def lower(self, object_data):
 
 class MeshMaterial(Material):
 
-    def __init__(self, color=0xffffff, reflectivity=0.5, map=None, **kwargs):
+    def __init__(self, color=0xffffff, reflectivity=0.5, map=None,
+        opacity = 1.0, **kwargs):
         super(MeshMaterial, self).__init__()
         self.color = color
         self.reflectivity = reflectivity
         self.map = map
+        self.opacity = opacity
         self.properties = kwargs
 
     def lower(self, object_data):
@@ -233,6 +235,7 @@ def lower(self, object_data):
             u"type": self._type,
             u"color": self.color,
             u"reflectivity": self.reflectivity,
+            u"opacity": self.opacity
         }
         data.update(self.properties)
         if self.map is not None:
@@ -276,27 +279,29 @@ def lower(self, object_data):
 
 class CanvasImage(Image):
 
-    def __init__(self):
+    def __init__(self, alpha):
         super(CanvasImage, self).__init__()
-        # self.data = data
+        self.alpha = alpha
 
     def lower(self, object_data):
         return {
             u"uuid": self.uuid,
-            u"url": u'place_holder'
+            u"url": u'place_holder',
+            u"alpha": self.alpha
         }
 
 
 class TextTexture(Texture):
 
-    def __init__(self, text, font='96px sans-serif', width=200, height=100, position=[10, 10]):
+    def __init__(self, text, font='96px sans-serif', width=200, height=100,
+       position=[10, 10],alpha=True):
         super(TextTexture, self).__init__()
         self.text = text
         self.font = font
         self.width = width
         self.height = height
         self.position = position
-        self.image = CanvasImage()
+        self.image = CanvasImage(alpha)
 
     def lower(self, object_data):
         return {