panda3d画出vertices = Point3-1 -1 0 Point31 -1 0 Point31 1 0 Point3-1 1 0 Point3-1 -1 1 Point31 -1 1 Point31 1 1 Point3-1 1 1以这8个点所组成的立体图形

代码如下：

from direct.showbase.ShowBase import ShowBase from panda3d.core import Point3 from panda3d.core import GeomVertexFormat, GeomVertexData, GeomVertexWriter from panda3d.core import GeomTriangles, Geom, GeomNode

class MyDemo(ShowBase): def init(self): ShowBase.init(self)

    # Set up vertices
    vertices = [
        Point3(-1, -1, 0),
        Point3(1, -1, 0),
        Point3(1, 1, 0),
        Point3(-1, 1, 0),
        Point3(-1, -1, 1),
        Point3(1, -1, 1),
        Point3(1, 1, 1),
        Point3(-1, 1, 1),
    ]

    # Set up vertex format and data
    format = GeomVertexFormat.getV3()
    vdata = GeomVertexData('vertices', format, Geom.UHStatic)
    vertex = GeomVertexWriter(vdata, 'vertex')
    for v in vertices:
        vertex.addData3f(v)

    # Set up indices for triangles
    indices = [
        0, 1, 2,
        2, 3, 0,
        4, 5, 6,
        6, 7, 4,
        0, 4, 7,
        7, 3, 0,
        1, 5, 6,
        6, 2, 1,
        0, 4, 5,
        5, 1, 0,
        3, 7, 6,
        6, 2, 3,
    ]

    # Set up triangles
    tris = GeomTriangles(Geom.UHStatic)
    for i in range(0, len(indices), 3):
        tris.addVertices(indices[i], indices[i+1], indices[i+2])
        tris.closePrimitive()

    # Set up geometry and node
    geom = Geom(vdata)
    geom.addPrimitive(tris)
    node = GeomNode('cube')
    node.addGeom(geom)

    # Attach node to render
    self.render.attachNewNode(node)

demo = MyDemo() demo.run(