NF: Adding actor for cone, TEST: Adding uni tests for cone.

fury/actor.py

@@ -985,3 +985,79 @@ def superquadric(
         material=material,
         enable_picking=enable_picking,
     )
+
+
+def cone(
+    centers,
+    *,
+    colors=(1, 1, 1),
+    height=1,
+    sectors=10,
+    radii=0.5,
+    scales=(1, 1, 1),
+    directions=(0, 1, 0),
+    opacity=None,
+    material="phong",
+    enable_picking=True,
+):
+    """Visualize one or many cones with different features.
+
+    Parameters
+    ----------
+    centers : ndarray, shape (N, 3)
+        cone positions.
+    colors : ndarray (N,3) or (N, 4) or tuple (3,) or tuple (4,), optional
+        RGB or RGBA (for opacity) R, G, B and A should be at the range [0, 1].
+    height: float, optional
+        The height of the cone. Default is 1.
+    sectors: int, optional
+        The number of divisions around the cones's circumference .
+        Higher values produce smoother cones. Default is 10.
+    radii : float or ndarray (N,) or tuple, optional
+        The radius of the base of the cones, single value applies to all cones,
+        while an array specifies a radius for each cone individually. Default:0.5.
+    scales : int or ndarray (N, 3) or tuple (3,), optional
+        Scaling factors for the cones in the (x, y, z) dimensions.
+        Default is uniform scaling (1, 1, 1).
+    directions : ndarray, shape (N, 3), optional
+        The orientation vector of the cone.
+    opacity : float, optional
+        Takes values from 0 (fully transparent) to 1 (opaque).
+        If both `opacity` and RGBA are provided, the final alpha will be:
+        final_alpha = alpha_in_RGBA * opacity
+    material : str, optional
+        The material type for the cones. Options are 'phong' and 'basic'.
+    enable_picking : bool, optional
+        Whether the cones should be pickable in a 3D scene.
+
+    Returns
+    -------
+    mesh_actor : Actor
+        A mesh actor containing the generated cones, with the specified
+        material and properties.
+
+    Examples
+    --------
+    >>> from fury import window, actor
+    >>> import numpy as np
+    >>> scene = window.Scene()
+    >>> centers = np.random.rand(5, 3) * 10
+    >>> colors = np.random.rand(5, 3)
+    >>> cone_actor = actor.cone(centers=centers, colors=colors)
+    >>> scene.add(cone_actor)
+    >>> show_manager = window.ShowManager(scene=scene, size=(600, 600))
+    >>> show_manager.start()
+    """
+
+    vertices, faces = fp.prim_cone(radius=radii, height=height, sectors=sectors)
+    return actor_from_primitive(
+        vertices,
+        faces,
+        centers=centers,
+        colors=colors,
+        scales=scales,
+        directions=directions,
+        opacity=opacity,
+        material=material,
+        enable_picking=enable_picking,
+    )

fury/tests/test_actor.py

@@ -682,3 +682,55 @@ def test_superquadric():
     assert g == 0 and b == 0
     assert r == 255
     scene.remove(superquadric_actor_2)
+
+
+def test_cone():
+    scene = window.Scene()
+    centers = np.array([[0, 0, 0]])
+    colors = np.array([[1, 0, 0]])
+
+    cone_actor = actor.cone(centers=centers, colors=colors)
+    scene.add(cone_actor)
+
+    npt.assert_array_equal(cone_actor.local.position, centers[0])
+
+    assert cone_actor.prim_count == 1
+
+    window.snapshot(scene=scene, fname="cone_test_1.png")
+
+    img = Image.open("cone_test_1.png")
+    img_array = np.array(img)
+
+    mean_r, mean_g, mean_b, mean_a = np.mean(
+        img_array.reshape(-1, img_array.shape[2]), axis=0
+    )
+
+    assert mean_r > mean_b and mean_r > mean_g
+
+    middle_pixel = img_array[img_array.shape[0] // 2, img_array.shape[1] // 2]
+    r, g, b, a = middle_pixel
+    assert r > g and r > b
+    assert g == b
+    scene.remove(cone_actor)
+
+    cone_actor_2 = actor.cone(centers=centers, colors=colors, material="basic")
+    scene.add(cone_actor_2)
+    window.snapshot(scene=scene, fname="cone_test_2.png")
+
+    img = Image.open("cone_test_2.png")
+    img_array = np.array(img)
+
+    mean_r, mean_g, mean_b, mean_a = np.mean(
+        img_array.reshape(-1, img_array.shape[2]), axis=0
+    )
+
+    assert mean_r > mean_b and mean_r > mean_g
+    assert 0 < mean_r < 255
+    assert mean_g == 0 and mean_b == 0
+
+    middle_pixel = img_array[img_array.shape[0] // 2, img_array.shape[1] // 2]
+    r, g, b, a = middle_pixel
+    assert r > g and r > b
+    assert g == 0 and b == 0
+    assert r == 255
+    scene.remove(cone_actor_2)