Add .scale(), .translate(), and .rotate() methods to transformable objects.

2 files changed, 23 insertions, 19 deletions

diff --git a/dimension/tests/demo.dmnsn b/dimension/tests/demo.dmnsn
index fbf51da..331c2b4 100644
--- a/dimension/tests/demo.dmnsn
+++ b/dimension/tests/demo.dmnsn
@@ -20,7 +20,7 @@
 # Camera
 camera = PerspectiveCamera(location = (0, 0.25, -4),
                            look_at  = 0)
-camera.transform(rotate(53*Y))
+camera.rotate(53*Y)
 
 # Background
 background = PigmentMap(
@@ -51,7 +51,7 @@ hollow_cube = Difference(
         ior = 1.1,
       ),
     )
-    .transform(rotate(45*X)),
+    .rotate(45*X),
 
     Sphere(
       center = 0, radius = 1.25,
@@ -84,19 +84,15 @@ arrow = Union(
       6/6: Red,
     },
   )
-  .transform(scale(1, 2.75, 1))
-  .transform(translate(-1.25*Y)),
+  .scale(1, 2.75, 1)
+  .translate(-1.25*Y),
 )
 
 torii = Union(
   [
-    Torus(major_radius = 0.15, minor_radius = 0.05)
-      .transform(translate(-Y)),
-
+    Torus(major_radius = 0.15, minor_radius = 0.05).translate(-Y),
     Torus(major_radius = 0.15, minor_radius = 0.05),
-
-    Torus(major_radius = 0.15, minor_radius = 0.05)
-      .transform(translate(Y)),
+    Torus(major_radius = 0.15, minor_radius = 0.05).translate(Y),
   ],
   texture = Texture(
     pigment = Blue,
@@ -104,7 +100,7 @@ torii = Union(
   ),
 )
 
-spike = Union([arrow, torii]).transform(rotate(-45*X))
+spike = Union([arrow, torii]).rotate(-45*X)
 
 strip_textures = [
   Texture(pigment = Red),
@@ -122,7 +118,7 @@ for i in range(128):
   b = c
   c = a + Z
 
-strip = Union(strip_triangles).transform(translate(5, -2, -4))
+strip = Union(strip_triangles).translate(5, -2, -4)
 
 ground = Plane(
   normal = Y, distance = -2,
@@ -131,7 +127,7 @@ ground = Plane(
     Checker(),
     [
       White,
-      PigmentMap(Checker(), [Black, White]).transform(scale(1/3))
+      PigmentMap(Checker(), [Black, White]).scale(1/3)
     ],
   ),
 )
diff --git a/libdimension-python/dimension.pyx b/libdimension-python/dimension.pyx
index 60daf43..601fb69 100644
--- a/libdimension-python/dimension.pyx
+++ b/libdimension-python/dimension.pyx
@@ -347,6 +347,14 @@ def rotate(*args, **kwargs):
   cdef Vector rad = dmnsn_radians(1.0)*Vector(*args, **kwargs)
   return _Matrix(dmnsn_rotation_matrix(rad._v))
 
+cdef class _Transformable:
+  def scale(self, *args, **kwargs):
+    return self.transform(scale(*args, **kwargs))
+  def translate(self, *args, **kwargs):
+    return self.transform(translate(*args, **kwargs))
+  def rotate(self, *args, **kwargs):
+    return self.transform(rotate(*args, **kwargs))
+
 ##########
 # Colors #
 ##########
@@ -617,7 +625,7 @@ cdef class Leopard(Pattern):
 # Pigments #
 ############
 
-cdef class Pigment:
+cdef class Pigment(_Transformable):
   """Object surface coloring."""
   cdef dmnsn_pigment *_pigment
 
@@ -788,7 +796,7 @@ cdef class Reflection(Finish):
 # Textures #
 ############
 
-cdef class Texture:
+cdef class Texture(_Transformable):
   """Object surface properties."""
   cdef dmnsn_texture *_texture
 
@@ -888,7 +896,7 @@ cdef Interior _Interior(dmnsn_interior *interior):
 # Objects #
 ###########
 
-cdef class Object:
+cdef class Object(_Transformable):
   """Physical objects."""
   cdef dmnsn_object *_object
 
@@ -1247,7 +1255,7 @@ cdef class PointLight(Light):
 # Cameras #
 ###########
 
-cdef class Camera:
+cdef class Camera(_Transformable):
   """A camera."""
   cdef dmnsn_camera *_camera
 
@@ -1283,7 +1291,7 @@ cdef class PerspectiveCamera(Camera):
     Camera.__init__(self)
 
     # Apply the field of view angle
-    self.transform(scale(tan(dmnsn_radians(angle))*(X + Y) + Z))
+    self.scale(tan(dmnsn_radians(angle))*(X + Y) + Z)
 
     cdef Vector dir = Vector(look_at) - Vector(location)
     cdef Vector vsky = Vector(sky)
@@ -1299,7 +1307,7 @@ cdef class PerspectiveCamera(Camera):
                                                   vsky._v, right._v)))
 
     # Move the camera into position
-    self.transform(translate(Vector(location)))
+    self.translate(Vector(location))
 
 ##########
 # Scenes #