[WIP] Post-processing effects for FURY Effects API

docs/experimental/viz_laplacian.py

@@ -0,0 +1,66 @@
+import numpy as np
+
+from fury.actor import cube, sphere
+from fury.actors.effect_manager_alt import EffectManager
+from fury.window import (Scene, ShowManager, record)
+
+def normalize(array : np.array, min : float = 0.0, max : float = 1.0, axis : int = 0):
+    """Convert an array to a given desired range.
+
+    Parameters
+    ----------
+    array : np.ndarray
+        Array to be normalized.
+    min : float
+        Bottom value of the interval of normalization. If no value is given, it is passed as 0.0.
+    max : float
+        Upper value of the interval of normalization. If no value is given, it is passed as 1.0.
+
+    Returns
+    -------
+    array : np.array
+        Array converted to the given desired range.
+    """
+    if np.max(array) != np.min(array):
+        return ((array - np.min(array))/(np.max(array) - np.min(array)))*(max - min) + min
+    else:
+        raise ValueError(
+            "Can't normalize an array which maximum and minimum value are the same.")
+
+
+width, height = (800, 800)
+
+scene = Scene()
+scene.set_camera(position=(0, 0, -10),
+                 focal_point=(0.0,
+                              0.0,
+                              0.0),
+                 view_up=(0.0, 0.0, 0.0))
+
+manager = ShowManager(
+    scene,
+    "demo",
+    (width,
+     height))
+
+manager.initialize()
+
+offset = 1.0
+cube_actor = cube(np.array([[0.0, 0.0, -1.0 + offset]]), colors = (1.0, 0.5, 0.0))
+sphere_actor = sphere(np.array([[0.0, 0.0, 1.0 + offset], [1.0, 0.5, 1.0 + offset]]), (0.0, 1.0, 1.0), radii = 0.5)
+
+effects = EffectManager(manager)
+gauss_cube = effects.gaussian_blur(cube_actor, 1.0)
+gray_sphere = effects.grayscale(sphere_actor, 1.0)
+
+manager.scene.add(gray_sphere)
+manager.scene.add(gauss_cube)
+
+# effects.remove_effect(gauss_cube)
+
+interactive = True
+
+if interactive:
+    manager.start()
+
+record(scene, out_path = "post_process.png", size = (800, 800))