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_downloads/c6cd4d4a30ec7d9dc06d51ee1a512b27/instanced_mesh_picking.py

@@ -0,0 +1,96 @@
+# -*- coding: utf-8 -*-
+# vispy: gallery 30
+# -----------------------------------------------------------------------------
+# Copyright (c) Vispy Development Team. All Rights Reserved.
+# Distributed under the (new) BSD License. See LICENSE.txt for more info.
+# -----------------------------------------------------------------------------
+"""
+Picking Instance of InstancedMeshes
+===================================
+
+Demonstrates how to identify (pick) individual instanced meshes.
+
+"""
+
+import numpy as np
+
+from vispy import app, scene, use
+from vispy.io import read_mesh, load_data_file
+from vispy.scene.visuals import InstancedMesh
+from vispy.scene import transforms
+from scipy.spatial.transform import Rotation
+
+#Necessary to use InstancedMesh
+use(gl='gl+')
+
+canvas = scene.SceneCanvas(keys='interactive', bgcolor='white')
+view = canvas.central_widget.add_view()
+
+view.camera = 'turntable'
+view.camera.depth_value = 1e3
+
+#Load an mesh file
+mesh_path = load_data_file('spot/spot.obj.gz')
+
+n_instances = 8
+vertices, faces, normals, texcoords = read_mesh(mesh_path)
+instance_colors = np.random.rand(n_instances, 3).astype(np.float32)
+instance_positions = [[0,2,0], [2,0,0], [6,0,0], [3,4,1], [5,3,2], [6,2,1], [8,4,6], [1,2,6]]
+instance_transforms = Rotation.identity(n_instances).as_matrix().astype(np.float32)
+
+# Create a colored `MeshVisual`.
+mesh = InstancedMesh(
+    vertices,
+    faces,
+    instance_colors=instance_colors,
+    instance_positions=instance_positions,
+    instance_transforms=instance_transforms,
+    parent=view.scene,
+)
+
+scene.visuals.XYZAxis(parent=view.scene)
+mesh.interactive = True
+
+@canvas.events.mouse_press.connect
+def on_mouse_press(event):
+    clicked_mesh = canvas.visual_at(event.pos)
+    if isinstance(clicked_mesh, InstancedMesh):
+        pos1, min, min_pos = get_view_axis_in_scene_coordinates(
+            event.pos, clicked_mesh
+        )
+        instance_pos = clicked_mesh.instance_positions[min_pos]
+        print(f"visual at : {clicked_mesh}")
+        print(f"event.pos : {event.pos}")
+        print(f"min distance : {min} and min_pos : {instance_pos}")
+
+
+
+def get_view_axis_in_scene_coordinates(pos, mesh):
+    event_pos = np.array([pos[0], pos[1], 0, 1])  
+    instances_on_canvas = []
+    # Translate each position to corresponding 2d canvas coordinates
+    for instance in mesh.instance_positions:
+        on_canvas = mesh.get_transform(map_from="visual", map_to="canvas").map(instance)
+        on_canvas /= on_canvas[3:]
+        instances_on_canvas.append(on_canvas)
+
+    min = 10000
+    min_pos = None
+    # Find the closest position to the clicked position
+    for i, instance_pos in enumerate(instances_on_canvas):
+        # Not minding z axis
+        temp_min = np.linalg.norm(
+            np.array(event_pos[:2]) - np.array(instance_pos[:2])
+        )
+        if temp_min < min:
+            min = temp_min
+            min_pos = i
+
+    return instances_on_canvas, min, min_pos
+
+canvas.show()
+
+
+if __name__ == "__main__":
+    print(__doc__)
+    app.run()

_downloads/dbc1d4e92532a36ea2535625b3648b29/instanced_mesh_picking.ipynb

@@ -0,0 +1,54 @@
+{
+  "cells": [
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {
+        "collapsed": false
+      },
+      "outputs": [],
+      "source": [
+        "%gui qt"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "\n# Picking Instance of InstancedMeshes\n\nDemonstrates how to identify (pick) individual instanced meshes.\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {
+        "collapsed": false
+      },
+      "outputs": [],
+      "source": [
+        "import numpy as np\n\nfrom vispy import app, scene, use\nfrom vispy.io import read_mesh, load_data_file\nfrom vispy.scene.visuals import InstancedMesh\nfrom vispy.scene import transforms\nfrom scipy.spatial.transform import Rotation\n\n#Necessary to use InstancedMesh\nuse(gl='gl+')\n\ncanvas = scene.SceneCanvas(keys='interactive', bgcolor='white')\nview = canvas.central_widget.add_view()\n\nview.camera = 'turntable'\nview.camera.depth_value = 1e3\n\n#Load an mesh file\nmesh_path = load_data_file('spot/spot.obj.gz')\n\nn_instances = 8\nvertices, faces, normals, texcoords = read_mesh(mesh_path)\ninstance_colors = np.random.rand(n_instances, 3).astype(np.float32)\ninstance_positions = [[0,2,0], [2,0,0], [6,0,0], [3,4,1], [5,3,2], [6,2,1], [8,4,6], [1,2,6]]\ninstance_transforms = Rotation.identity(n_instances).as_matrix().astype(np.float32)\n\n# Create a colored `MeshVisual`.\nmesh = InstancedMesh(\n    vertices,\n    faces,\n    instance_colors=instance_colors,\n    instance_positions=instance_positions,\n    instance_transforms=instance_transforms,\n    parent=view.scene,\n)\n\nscene.visuals.XYZAxis(parent=view.scene)\nmesh.interactive = True\n\[email protected]_press.connect\ndef on_mouse_press(event):\n    clicked_mesh = canvas.visual_at(event.pos)\n    if isinstance(clicked_mesh, InstancedMesh):\n        pos1, min, min_pos = get_view_axis_in_scene_coordinates(\n            event.pos, clicked_mesh\n        )\n        instance_pos = clicked_mesh.instance_positions[min_pos]\n        print(f\"visual at : {clicked_mesh}\")\n        print(f\"event.pos : {event.pos}\")\n        print(f\"min distance : {min} and min_pos : {instance_pos}\")\n       \n\n\ndef get_view_axis_in_scene_coordinates(pos, mesh):\n    event_pos = np.array([pos[0], pos[1], 0, 1])  \n    instances_on_canvas = []\n    # Translate each position to corresponding 2d canvas coordinates\n    for instance in mesh.instance_positions:\n        on_canvas = mesh.get_transform(map_from=\"visual\", map_to=\"canvas\").map(instance)\n        on_canvas /= on_canvas[3:]\n        instances_on_canvas.append(on_canvas)\n\n    min = 10000\n    min_pos = None\n    # Find the closest position to the clicked position\n    for i, instance_pos in enumerate(instances_on_canvas):\n        # Not minding z axis\n        temp_min = np.linalg.norm(\n            np.array(event_pos[:2]) - np.array(instance_pos[:2])\n        )\n        if temp_min < min:\n            min = temp_min\n            min_pos = i\n\n    return instances_on_canvas, min, min_pos\n\ncanvas.show()\n\n\nif __name__ == \"__main__\":\n    print(__doc__)\n    app.run()"
+      ]
+    }
+  ],
+  "metadata": {
+    "kernelspec": {
+      "display_name": "Python 3",
+      "language": "python",
+      "name": "python3"
+    },
+    "language_info": {
+      "codemirror_mode": {
+        "name": "ipython",
+        "version": 3
+      },
+      "file_extension": ".py",
+      "mimetype": "text/x-python",
+      "name": "python",
+      "nbconvert_exporter": "python",
+      "pygments_lexer": "ipython3",
+      "version": "3.9.19"
+    }
+  },
+  "nbformat": 4,
+  "nbformat_minor": 0
+}

_sources/gallery/gloo/animate_images.rst.txt

@@ -150,7 +150,7 @@ Draw a new array of random image pixels on every draw cycle.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 3.790 seconds)
+   **Total running time of the script:** (0 minutes 4.155 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_animate_images.py:

_sources/gallery/gloo/animate_images_slice.rst.txt

@@ -179,7 +179,7 @@ to give the effect of "morphing" noise.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.580 seconds)
+   **Total running time of the script:** (0 minutes 0.571 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_animate_images_slice.py:

_sources/gallery/gloo/animate_shape.rst.txt

@@ -144,7 +144,7 @@ a Texture2D and VertexBuffer and a timer to control the drawing.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.637 seconds)
+   **Total running time of the script:** (0 minutes 0.599 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_animate_shape.py:

_sources/gallery/gloo/colored_cube.rst.txt

@@ -122,7 +122,7 @@ Show a rotating colored cube
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.133 seconds)
+   **Total running time of the script:** (0 minutes 0.125 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_colored_cube.py:

_sources/gallery/gloo/colored_cube_instanced.rst.txt

@@ -133,7 +133,7 @@ Draw many colored cubes using instanced rendering
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.214 seconds)
+   **Total running time of the script:** (0 minutes 0.195 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_colored_cube_instanced.py:

_sources/gallery/gloo/colored_quad.rst.txt

@@ -94,7 +94,7 @@ Create a new drawing using triangle_strip
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.502 seconds)
+   **Total running time of the script:** (0 minutes 0.475 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_colored_quad.py:

_sources/gallery/gloo/display_lines.rst.txt

@@ -167,7 +167,7 @@ that triggers rotation of the lines in 3D space.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.605 seconds)
+   **Total running time of the script:** (0 minutes 0.597 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_display_lines.py:

_sources/gallery/gloo/display_points.rst.txt

@@ -132,7 +132,7 @@ Simple example plotting 2D points.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.564 seconds)
+   **Total running time of the script:** (0 minutes 0.547 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_display_points.py:

_sources/gallery/gloo/display_shape.rst.txt

@@ -96,7 +96,7 @@ Simple example demonstrating showing a quad using a gloo Program.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.452 seconds)
+   **Total running time of the script:** (0 minutes 0.444 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_display_shape.py:

_sources/gallery/gloo/geometry_shader.rst.txt

@@ -124,7 +124,7 @@ NOTE: This example is currently not processed in CI.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.456 seconds)
+   **Total running time of the script:** (0 minutes 0.450 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_geometry_shader.py:

_sources/gallery/gloo/gl/cube.rst.txt

@@ -271,7 +271,7 @@ Drawing a rotated 3D cube
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.126 seconds)
+   **Total running time of the script:** (0 minutes 0.120 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_gl_cube.py:

_sources/gallery/gloo/gl/fireworks.rst.txt

@@ -181,7 +181,7 @@ calculated, such that each explostion is unique.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.102 seconds)
+   **Total running time of the script:** (0 minutes 0.096 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_gl_fireworks.py:

_sources/gallery/gloo/gl/quad.rst.txt

@@ -143,7 +143,7 @@ Drawing a simple quad
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.083 seconds)
+   **Total running time of the script:** (0 minutes 0.080 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_gl_quad.py:

_sources/gallery/gloo/gl/quad_instanced.rst.txt

@@ -170,7 +170,7 @@ uses instanced rendering to generate many copies of the same quad.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.077 seconds)
+   **Total running time of the script:** (0 minutes 0.075 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_gl_quad_instanced.py:

_sources/gallery/gloo/gl/sg_execution_times.rst.txt

@@ -6,7 +6,7 @@
 
 Computation times
 =================
-**00:00.387** total execution time for 4 files **from gallery/gloo/gl**:
+**00:00.371** total execution time for 4 files **from gallery/gloo/gl**:
 
 .. container::
 
@@ -33,14 +33,14 @@ Computation times
      - Time
      - Mem (MB)
    * - :ref:`sphx_glr_gallery_gloo_gl_cube.py` (``cube.py``)
-     - 00:00.126
+     - 00:00.120
      - 0.0
    * - :ref:`sphx_glr_gallery_gloo_gl_fireworks.py` (``fireworks.py``)
-     - 00:00.102
+     - 00:00.096
      - 0.0
    * - :ref:`sphx_glr_gallery_gloo_gl_quad.py` (``quad.py``)
-     - 00:00.083
+     - 00:00.080
      - 0.0
    * - :ref:`sphx_glr_gallery_gloo_gl_quad_instanced.py` (``quad_instanced.py``)
-     - 00:00.077
+     - 00:00.075
      - 0.0

_sources/gallery/gloo/gpuimage.rst.txt

@@ -148,7 +148,7 @@ Illustrate how to plot a 2D function (an image) y=f(x,y) on the GPU.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.810 seconds)
+   **Total running time of the script:** (0 minutes 0.781 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_gpuimage.py:

_sources/gallery/gloo/hello_fbo.rst.txt

@@ -156,7 +156,7 @@ This example blurs the output image.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.427 seconds)
+   **Total running time of the script:** (0 minutes 0.422 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_hello_fbo.py:

_sources/gallery/gloo/lighted_cube.rst.txt

@@ -184,7 +184,7 @@ Show a rotating cube with lighting
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.259 seconds)
+   **Total running time of the script:** (0 minutes 0.243 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_lighted_cube.py:

_sources/gallery/gloo/multi_texture.rst.txt

@@ -123,7 +123,7 @@ added.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.474 seconds)
+   **Total running time of the script:** (0 minutes 0.461 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_multi_texture.py:

_sources/gallery/gloo/outlined_cube.rst.txt

@@ -141,7 +141,7 @@ Show a rotating cube with an outline
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.148 seconds)
+   **Total running time of the script:** (0 minutes 0.138 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_outlined_cube.py:

_sources/gallery/gloo/post_processing.rst.txt

@@ -194,7 +194,7 @@ Show post-processing using a FrameBuffer
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 1.117 seconds)
+   **Total running time of the script:** (0 minutes 1.069 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_post_processing.py:

_sources/gallery/gloo/rotate_cube.rst.txt

@@ -204,7 +204,7 @@ This example shows how to display 3D objects.
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 1.155 seconds)
+   **Total running time of the script:** (0 minutes 1.107 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_rotate_cube.py:

_sources/gallery/gloo/rotating_quad.rst.txt

@@ -106,7 +106,7 @@ Use a Timer to animate a quad
 
 .. rst-class:: sphx-glr-timing
 
-   **Total running time of the script:** (0 minutes 0.655 seconds)
+   **Total running time of the script:** (0 minutes 0.630 seconds)
 
 
 .. _sphx_glr_download_gallery_gloo_rotating_quad.py: