Capturer les Viewports de la scène 3D et rendre à une texture ou une fenêtre

Chaque scène 3D peut comprendre n’importe quel nombre de vues. En utilisant Aspose.3D for Python via .NET API, les développeurs peuvent capturer un ou plusieurs viewports dans une seule capture d’écran. Ils peuvent le rendre dans l’application .NET basée sur GUI ou une image.

Capture et rendu des Viewports de la scène 3D

Les méthodes create_render_texture et create_render_window exposées par la classe RenderFactory peuvent être utilisées pour créer une nouvelle cible de rendu qui rend la scène à une texture ou à une fenêtre.

Échantillon de programmation

Cet exemple de code capture un viewport de 3D Scene et le rend de deux manières différentes.

from aspose import pycore
from aspose.pydrawing import Color
from aspose.pydrawing.imaging import ImageFormat
from aspose.threed import Scene
from aspose.threed.entities import Camera, Light, LightType
from aspose.threed.render import ITexture2D, RenderParameters, Renderer
from aspose.threed.utilities import RelativeRectangle, Vector3

#  For complete examples and data files, please go to https:# github.com/aspose-3d/Aspose.3D-for-.NET
#  Load an existing 3D scene
scene = Scene("data-dir"  + "scene.obj")
#  Create an instance of the camera
camera = Camera()
scene.root_node.create_child_node("camera", camera).transform.translation = Vector3(2, 44, 66)
#  Set the target
camera.look_at = Vector3(50, 12, 0)
light = Light()
light.color = Vector3(Color.white)
light.light_type = LightType.POINT
#  Create a light
scene.root_node.create_child_node("light", light).transform.translation = Vector3(26, 57, 43)
#  The CreateRenderer will create a hardware OpenGL-backend renderer
#  And some internal initializations will be done.
#  When the renderer left using the scope, the unmanaged hardware resources will also be disposed
with Renderer.create_renderer() as renderer:
    renderer.enable_shadows = False
    #  Create a new render target that renders the scene to texture(s)
    #  Use default render parameters
    #  And one output targets
    #  Size is 1024 x 1024
    #  This render target can have multiple render output textures, but here we only need one output.
    #  The other textures and depth textures are mainly used by deferred shading in the future.
    #  But you can also access the depth texture through IRenderTexture.DepthTeture
    #  Use CreateRenderWindow method to render in window, like:
    #  Window = renderer.RenderFactory.CreateRenderWindow(new RenderParameters(), Handle);
    with renderer.render_factory.create_render_texture(RenderParameters(), 1, 1024, 1024) as rt:
        rectangle = RelativeRectangle()
        rectangle.scale_width = 1.0
        rectangle.scale_height = 1 .0
        #  This render target has one viewport to render, the viewport occupies the 100% width and 100% height
        vp = rt.create_viewport(camera, rectangle)
        #  Render the target and save the target texture to external file
        renderer.render(rt)
        pycore.cast(ITexture2D, rt.targets[0]).save("out"  + "file-1viewports_out.png", ImageFormat.png)
        rectangle2 = RelativeRectangle()
        rectangle2.scale_width = 0.5
        rectangle2.scale_height = 1 .0
        #  Now let's change the previous viewport only uses the half left side(50% width and 100% height)
        vp.area = rectangle2
        rectangle3 = RelativeRectangle()
        rectangle3.scale_x = 0.5
        rectangle3.scale_width = 0.5
        rectangle3.scale_height = 1 .0
        #  And create a new viewport that occupies the 50% width and 100% height and starts from 50%
        #  Both of them are using the same camera, so the rendered content should be the same
        rt.create_viewport(camera, rectangle3)
        #  But this time let's increase the field of view of the camera to 90 degree so it can see more part of the scene
        camera.field_of_view = 90.0
        renderer.render(rt)
        pycore.cast(ITexture2D, rt.targets[0]).save("out"  + "file-2viewports_out.png", ImageFormat.png)