Creating a skybox from a cubemap

Code Snippets
1

In Panda3D, it is possible to use cubemap, but their use seems to be marked as x-files. This code shows how to load a cubic texture by analogy with this tutorial.

from direct.showbase.ShowBase import ShowBase
from panda3d.core import Texture, TexturePool, LoaderOptions, TextureStage, TexGenAttrib, TransformState

class TetsCubeMap(ShowBase):
    def __init__(self):
        ShowBase.__init__(self)

        # The options when loading the texture, in this case, does not make any sense, just for demonstration.
        lo = LoaderOptions(flags = LoaderOptions.TF_generate_mipmaps)

        # Let's create a texture named "world_cube_map" and configure it.
        texture_cube_map = Texture("world_cube_map")
        texture_cube_map.setup_cube_map()
        texture_cube_map.read(fullpath = 'right.jpg',  z = 0, n = 0, read_pages = False, read_mipmaps = False, options = lo)
        texture_cube_map.read(fullpath = 'left.jpg',   z = 1, n = 0, read_pages = False, read_mipmaps = False, options = lo)
        texture_cube_map.read(fullpath = 'bottom.jpg', z = 2, n = 0, read_pages = False, read_mipmaps = False, options = lo)
        texture_cube_map.read(fullpath = 'top.jpg',    z = 3, n = 0, read_pages = False, read_mipmaps = False, options = lo)
        texture_cube_map.read(fullpath = 'front.jpg',  z = 4, n = 0, read_pages = False, read_mipmaps = False, options = lo)
        texture_cube_map.read(fullpath = 'back.jpg',   z = 5, n = 0, read_pages = False, read_mipmaps = False, options = lo)

        # You can add texture to the pool if you need to.
        TexturePool.add_texture(texture_cube_map)

        skybox = loader.load_model('sphere.bam')
        skybox.reparent_to(render)
        skybox.set_texture(texture_cube_map)

        # Necessary manipulations with the transformation of texture coordinates.
        ts = TextureStage.get_default()
        skybox.set_tex_gen(ts, TexGenAttrib.M_world_cube_map)
        skybox.set_tex_hpr(ts, (0, 90, 180))
        skybox.set_tex_scale(ts, (1, -1))
        # We will remove rendering effects that will be unnecessary.
        skybox.set_light_off()
        skybox.set_material_off()

app = TetsCubeMap()
app.run()

sphere.bam (236.2 KB)

1 Like
2

Another way to load them is just with loader.loadCubeMap("map#.png"), where # will be substituted with a number corresponding to the face of the cube map.

1 Like
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In fact, what you call simply is not the norm. I agree with wezu completely.