.. DO NOT EDIT. .. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY. .. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE: .. "_gallery/feature_demo/gltf_unlit.py" .. LINE NUMBERS ARE GIVEN BELOW. .. only:: html .. note:: :class: sphx-glr-download-link-note :ref:`Go to the end ` to download the full example code. .. rst-class:: sphx-glr-example-title .. _sphx_glr__gallery_feature_demo_gltf_unlit.py: glTF Unlit Material Example =========================== This example demonstrates unlit materials in glTF models. .. GENERATED FROM PYTHON SOURCE LINES 9-15 .. note:: To run this example, you need a model from the source repo's example folder. If you are running this example from a local copy of the code (dev install) no further actions are needed. Otherwise, you may have to replace the path below to point to the location of the model. .. GENERATED FROM PYTHON SOURCE LINES 15-27 .. code-block:: Python import os from pathlib import Path try: # modify this line if your model is located elsewhere model_dir = Path(__file__).parents[1] / "data" except NameError: # compatibility with sphinx-gallery model_dir = Path(os.getcwd()).parent / "data" .. GENERATED FROM PYTHON SOURCE LINES 28-29 Once the path is set correctly, you can use the model as follows: .. GENERATED FROM PYTHON SOURCE LINES 29-143 .. code-block:: Python import imageio.v3 as iio from rendercanvas.auto import RenderCanvas, loop import pygfx as gfx from wgpu.utils.imgui import ImguiRenderer from imgui_bundle import imgui # Init canvas = RenderCanvas(size=(1280, 720), title="gltf_unlit") renderer = gfx.renderers.WgpuRenderer(canvas) scene = gfx.Scene() # Read cube image and turn it into a 3D image (a 4d array) env_img = iio.imread("imageio:meadow_cube.jpg") cube_size = env_img.shape[1] env_img.shape = 6, cube_size, cube_size, env_img.shape[-1] # Create environment map env_tex = gfx.Texture( env_img, dim=2, size=(cube_size, cube_size, 6), generate_mipmaps=True ) # Load meshes, and apply env map # Note that this lights the helmet already gltf_path = model_dir / "just_a_girl" / "scene.gltf" gltf = gfx.load_gltf(gltf_path) # gfx.print_scene_graph(gltf.scene) # Uncomment to see the tree structure def add_env_map(obj, env_map): if isinstance(obj, gfx.Mesh) and isinstance(obj.material, gfx.MeshStandardMaterial): obj.material.env_map = env_map unlit_model = gltf.scene if gltf.scene else gltf.scenes[0] unlit_model.local.position = (-100, 0, 0) scene.add(unlit_model) from pygfx.utils.load_gltf import _GLTF # noqa # Hack to remove the unlit plugin parser = _GLTF() del parser._plugins["KHR_materials_unlit"] pbr_gltf = parser.load(gltf_path, quiet=True) pbr_model = pbr_gltf.scene if pbr_gltf.scene else pbr_gltf.scenes[0] pbr_model.traverse(lambda obj: add_env_map(obj, env_tex)) pbr_model.local.position = (100, 0, 0) scene.add(pbr_model) gui_renderer = ImguiRenderer(renderer.device, canvas) state = {"ibl": True} def draw_imgui(): imgui.set_next_window_size((250, 0), imgui.Cond_.always) imgui.set_next_window_pos( (gui_renderer.backend.io.display_size.x - 250, 0), imgui.Cond_.always ) is_expand, _ = imgui.begin( "Controls", None, flags=imgui.WindowFlags_.no_move | imgui.WindowFlags_.no_resize, ) if is_expand: _, direct_light.visible = imgui.checkbox( "Directional Light", direct_light.visible ) _, ambient_light.visible = imgui.checkbox( "Ambient Light", ambient_light.visible ) changed, state["ibl"] = imgui.checkbox("IBL", state["ibl"]) if changed: if state["ibl"]: pbr_model.traverse(lambda obj: add_env_map(obj, env_tex)) else: pbr_model.traverse(lambda obj: add_env_map(obj, None)) imgui.end() gui_renderer.set_gui(draw_imgui) # Add extra light more or less where the sun seems to be in the skybox direct_light = gfx.DirectionalLight(intensity=2.5) direct_light.local.position = (-5, 10, -10) scene.add(direct_light) ambient_light = gfx.AmbientLight(intensity=0.2) scene.add(ambient_light) # Create camera and controller camera = gfx.PerspectiveCamera(45, 640 / 480) camera.show_object(scene) controller = gfx.OrbitController(camera, register_events=renderer) def animate(): renderer.render(scene, camera) gui_renderer.render() canvas.request_draw() if __name__ == "__main__": renderer.request_draw(animate) loop.run() .. image-sg:: /_gallery/feature_demo/images/sphx_glr_gltf_unlit_001.webp :alt: gltf unlit :srcset: /_gallery/feature_demo/images/sphx_glr_gltf_unlit_001.webp :class: sphx-glr-single-img .. rst-class:: sphx-glr-timing **Total running time of the script:** (0 minutes 2.118 seconds) .. _sphx_glr_download__gallery_feature_demo_gltf_unlit.py: .. only:: html .. container:: sphx-glr-footer sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: gltf_unlit.ipynb ` .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: gltf_unlit.py ` .. container:: sphx-glr-download sphx-glr-download-zip :download:`Download zipped: gltf_unlit.zip ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_ .. only:: html Interactive example ------------------- Try this example in your browser using Pyodide. Might not work with all examples and all devices. Check the output and your browser's console for details. .. raw:: html