Ursina引擎lit_with_shadows_shader当添加到三维模型时纹理消失

Question

这是我的代码：

import numba as nb
from ursina import *
from ursina.shaders import lit_with_shadows_shader


app = Ursina()

ground = Entity(
    model = 'untitled.gltf',
    z = 20,
    y = -3,
    collider = 'box',
    shader = lit_with_shadows_shader
)

pivot = Entity()
AmbientLight()
DirectionalLight(parent=pivot, y=2, z=3, shadows=True)

EditorCamera()
sky = Sky()
app.run()

我试图显示一个3D模型，我从sketchfab和没有shader = lit_with_shadows_shader它工作，但当我添加它，以使用环境光，它不显示纹理，它是模型，但它是白色的，没有任何表面。

Answer 1

为您的实体使用此代码：

ground = Entity(
    model = 'untitled.gltf',
    z = 20,
    y = -3,
    collider = 'box',
    texture = 'texture.png', # or load_texture('texture.png') : load texture
    shader = lit_with_shadows_shader
)

Answer 2

您需要定义您的纹理，否则着色器将无法渲染的东西是没有定义的。

ground = Entity(
    model = 'untitled.gltf',
    texture = "yourTextureName", # Put your texture here
    z = 20,
    y = -3,
    collider = 'box',
    shader = lit_with_shadows_shader
)

如果您没有纹理，您可以简单地添加颜色，如下所示：

ground = Entity(
    model = 'untitled.gltf',
    color = color.rgba(40,90,12,0.5) #This will be half transparent, to disable it change the 0.5 value to 1 or 0
    z = 20,
    y = -3,
    collider = 'box',
    shader = lit_with_shadows_shader
)

您的最终代码应该是

import numba as nb
from ursina import *
from ursina.shaders import lit_with_shadows_shader


app = Ursina()

ground = Entity(
    model = 'untitled.gltf',
    texture = 'textureFileName.png',
    z = 20,
    y = -3,
    collider = 'box',
    shader = lit_with_shadows_shader
)

pivot = Entity()
AmbientLight()
DirectionalLight(parent=pivot, y=2, z=3, shadows=True)

EditorCamera()
sky = Sky()
app.run()

Answer 3

您缺少了texture，下面是您的代码：

import numba as nb
from ursina import *
from ursina.shaders import lit_with_shadows_shader


app = Ursina()

    ground = Entity(
    model = 'untitled.gltf',
    z = 20,
    y = -3,
    collider = 'box',
    texture='white_cude',
    shader = lit_with_shadows_shader
)

pivot = Entity()
AmbientLight()
DirectionalLight(parent=pivot, y=2, z=3, shadows=True)

EditorCamera()
sky = Sky()
app.run()