From 5ef245c1c2616579df4443f6cdfa8f14c03c9c6f Mon Sep 17 00:00:00 2001
From: inter <inter@qq.com>
Date: Sun, 21 Sep 2025 20:19:37 +0800
Subject: [PATCH] Add File

---
 tools/visual_utils/open3d_vis_utils.py | 116 +++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 tools/visual_utils/open3d_vis_utils.py

diff --git a/tools/visual_utils/open3d_vis_utils.py b/tools/visual_utils/open3d_vis_utils.py
new file mode 100644
index 0000000..706d037
--- /dev/null
+++ b/tools/visual_utils/open3d_vis_utils.py
@@ -0,0 +1,116 @@
+"""
+Open3d visualization tool box
+Written by Jihan YANG
+All rights preserved from 2021 - present.
+"""
+import open3d
+import torch
+import matplotlib
+import numpy as np
+
+box_colormap = [
+    [1, 1, 1],
+    [0, 1, 0],
+    [0, 1, 1],
+    [1, 1, 0],
+]
+
+
+def get_coor_colors(obj_labels):
+    """
+    Args:
+        obj_labels: 1 is ground, labels > 1 indicates different instance cluster
+
+    Returns:
+        rgb: [N, 3]. color for each point.
+    """
+    colors = matplotlib.colors.XKCD_COLORS.values()
+    max_color_num = obj_labels.max()
+
+    color_list = list(colors)[:max_color_num+1]
+    colors_rgba = [matplotlib.colors.to_rgba_array(color) for color in color_list]
+    label_rgba = np.array(colors_rgba)[obj_labels]
+    label_rgba = label_rgba.squeeze()[:, :3]
+
+    return label_rgba
+
+
+def draw_scenes(points, gt_boxes=None, ref_boxes=None, ref_labels=None, ref_scores=None, point_colors=None, draw_origin=True):
+    if isinstance(points, torch.Tensor):
+        points = points.cpu().numpy()
+    if isinstance(gt_boxes, torch.Tensor):
+        gt_boxes = gt_boxes.cpu().numpy()
+    if isinstance(ref_boxes, torch.Tensor):
+        ref_boxes = ref_boxes.cpu().numpy()
+
+    vis = open3d.visualization.Visualizer()
+    vis.create_window()
+
+    vis.get_render_option().point_size = 1.0
+    vis.get_render_option().background_color = np.zeros(3)
+
+    # draw origin
+    if draw_origin:
+        axis_pcd = open3d.geometry.TriangleMesh.create_coordinate_frame(size=1.0, origin=[0, 0, 0])
+        vis.add_geometry(axis_pcd)
+
+    pts = open3d.geometry.PointCloud()
+    pts.points = open3d.utility.Vector3dVector(points[:, :3])
+
+    vis.add_geometry(pts)
+    if point_colors is None:
+        pts.colors = open3d.utility.Vector3dVector(np.ones((points.shape[0], 3)))
+    else:
+        pts.colors = open3d.utility.Vector3dVector(point_colors)
+
+    if gt_boxes is not None:
+        vis = draw_box(vis, gt_boxes, (0, 0, 1))
+
+    if ref_boxes is not None:
+        vis = draw_box(vis, ref_boxes, (0, 1, 0), ref_labels, ref_scores)
+
+    vis.run()
+    vis.destroy_window()
+
+
+def translate_boxes_to_open3d_instance(gt_boxes):
+    """
+             4-------- 6
+           /|         /|
+          5 -------- 3 .
+          | |        | |
+          . 7 -------- 1
+          |/         |/
+          2 -------- 0
+    """
+    center = gt_boxes[0:3]
+    lwh = gt_boxes[3:6]
+    axis_angles = np.array([0, 0, gt_boxes[6] + 1e-10])
+    rot = open3d.geometry.get_rotation_matrix_from_axis_angle(axis_angles)
+    box3d = open3d.geometry.OrientedBoundingBox(center, rot, lwh)
+
+    line_set = open3d.geometry.LineSet.create_from_oriented_bounding_box(box3d)
+
+    # import ipdb; ipdb.set_trace(context=20)
+    lines = np.asarray(line_set.lines)
+    lines = np.concatenate([lines, np.array([[1, 4], [7, 6]])], axis=0)
+
+    line_set.lines = open3d.utility.Vector2iVector(lines)
+
+    return line_set, box3d
+
+
+def draw_box(vis, gt_boxes, color=(0, 1, 0), ref_labels=None, score=None):
+    for i in range(gt_boxes.shape[0]):
+        line_set, box3d = translate_boxes_to_open3d_instance(gt_boxes[i])
+        if ref_labels is None:
+            line_set.paint_uniform_color(color)
+        else:
+            line_set.paint_uniform_color(box_colormap[ref_labels[i]])
+
+        vis.add_geometry(line_set)
+
+        # if score is not None:
+        #     corners = box3d.get_box_points()
+        #     vis.add_3d_label(corners[5], '%.2f' % score[i])
+    return vis