def __build_Star_Sphere(self, bg_stars):
from panda3d.core import GeomVertexWriter, GeomVertexFormat, GeomVertexData
from panda3d.core import Geom, GeomNode, GeomPoints, AmbientLight
self.star_sphere_np.removeNode()
# Fill GeomVertexData.
vformat = GeomVertexFormat.getV3c4()
vdata = GeomVertexData("Data", vformat, Geom.UHStatic)
vertices = GeomVertexWriter(vdata, "vertex")
colours = GeomVertexWriter(vdata, "color")
for coords in bg_stars:
x, y, z = coords
vertices.addData3f(x, y, z)
colours.addData4f(1, 1, 1, 1)
# Render bg stars.
bg_stars = GeomPoints(Geom.UHStatic)
bg_stars.addNextVertices(_env.STAR_COUNT)
bg_stars_geom = Geom(vdata)
bg_stars_geom.addPrimitive(bg_stars)
star_sphere = GeomNode("star_sphere")
star_sphere.addGeom(bg_stars_geom)
star_sphere_np = NodePath(star_sphere)
star_sphere_np.reparentTo(self.NP)
return star_sphere_np
def __build_Star_Sphere(self, bg_stars):
from panda3d.core import GeomVertexWriter, GeomVertexFormat, GeomVertexData
from panda3d.core import Geom, GeomNode, GeomPoints, AmbientLight
self.star_sphere_np.removeNode()
# Fill GeomVertexData.
vformat = GeomVertexFormat.getV3c4()
vdata = GeomVertexData("Data", vformat, Geom.UHStatic)
vertices = GeomVertexWriter(vdata, "vertex")
colours = GeomVertexWriter(vdata, "color")
for coords in bg_stars:
x, y, z = coords
vertices.addData3f(x, y, z)
colours.addData4f(1, 1, 1, 1)
# Render bg stars.
bg_stars = GeomPoints(Geom.UHStatic)
bg_stars.addNextVertices(_env.STAR_COUNT)
bg_stars_geom = Geom(vdata)
bg_stars_geom.addPrimitive(bg_stars)
star_sphere = GeomNode("star_sphere")
star_sphere.addGeom(bg_stars_geom)
star_sphere_np = NodePath(star_sphere)
star_sphere_np.reparentTo(self.NP)
return star_sphere_np
def __node(self):
# this function creates and returns particles' GeomNode
points = GeomPoints(GeomEnums.UH_static)
points.addNextVertices(self.__numPart)
format_ = GeomVertexFormat.getEmpty()
geom = Geom(GeomVertexData("abc", format_, GeomEnums.UH_static))
geom.addPrimitive(points)
geom.setBounds(OmniBoundingVolume()) # always render it
node = GeomNode("node")
node.addGeom(geom)
return node
dlnp.setHpr(0, -60, 0)
#altRender.setLight(dlnp)
#altRender.setLight(alnp)
# vertex writer
vdata = GeomVertexData('points', GeomVertexFormat.getV3(), Geom.UHDynamic)
vwriter = GeomVertexWriter(vdata, 'vertex')
# 100 randomly generated vertex coordinates
for i in range(100):
vwriter.addData3f(uniform(-100, 100), uniform(-100, 100),
uniform(-100, 100))
# create geom
points = GeomPoints(Geom.UHDynamic)
points.addNextVertices(100)
points.closePrimitive()
geo = Geom(vdata)
geo.addPrimitive(points)
gnode = GeomNode('points')
gnode.addGeom(geo)
np = render.attachNewNode(gnode)
# point sprite effect
np.setTransparency(TransparencyAttrib.MDual)
np.setTexGen(TextureStage.getDefault(), TexGenAttrib.MPointSprite)
np.setTexture(altBuffer.getTexture())
np.setRenderModePerspective(True)
np.setRenderModeThickness(8)
