def addLine(self, points):
"""
Adds a line to class GeomNode from a pair of points
"""
#Creates objects needed to draw a geometry on the HUD
#The vertex data which will define the rendered geometry
vertex_data = GeomVertexData("graph", GeomVertexFormat.getV3(),
Geom.UHStatic)
#The object that writes vertexes the vertex data
writer = GeomVertexWriter(vertex_data, "vertex")
for point in points:
writer.add_data3f(point[0], 0, point[1])
#Defines that this geometry represents a polyline
primitive = GeomLinestrips(Geom.UHStatic)
#Tells geometry how many verticies will be added(?)
primitive.add_consecutive_vertices(0, 2)
primitive.close_primitive()
geometry = Geom(vertex_data)
geometry.add_primitive(primitive)
#Draws a graph on the HUD
self.geom_node.add_geom(geometry)
def createCircle(color_vec4=Vec4(1., 1., 1., 1.), with_hole=False, num_of_verts=10, radius=1.):
# Own Geometry
format = GeomVertexFormat.getV3c4()
vdata = GeomVertexData("colored_circle", format, Geom.UHStatic)
vdata.setNumRows(4)
vertexPosWriter = GeomVertexWriter(vdata, "vertex")
# generates circles in x-y plane
circle_points = math_utils.get_circle_vertices(num_of_verts=num_of_verts, radius=radius)
for p in circle_points:
vertexPosWriter.addData3f(p[0], p[1], p[2])
# let's also add color to each vertex
colorWriter = GeomVertexWriter(vdata, "color")
for i in range(num_of_verts):
colorWriter.addData4f(color_vec4)
# make primitives and assign vertices to them (primitives and primitive
# groups can be made independently from vdata, and are later assigned
# to vdata)
line = GeomLinestrips(Geom.UHStatic)
line.add_consecutive_vertices(0, num_of_verts)
if with_hole != True:
line.add_vertex(0) # connect it up at the end
line.closePrimitive() # the 1st primitive is finished
# make a Geom object to hold the primitives
geom = Geom(vdata)
geom.addPrimitive(line)
geom_node = GeomNode("colored_circle_node")
geom_node.addGeom(geom)
return geom_node
def create_GeomNode_Simple_Polygon_with_Hole_LineStrips(symbol_geometries):
color_vec4 = Vec4(1., 1., 1., 1.)
outerpolygon_contour_points = 0.1 * symbol_geometries[0][0]
inner_hole_contour_points = 0.1 * symbol_geometries[0][1]
# outerpolygon_contour_points = (
# np.array([[0, 1], [-1, 0], [0, -1], [1, 0]], dtype=np.float64))
# inner_hole_contour_points = (
# 0.5 * np.array([[0, 1], [-1, 0], [0, -1], [1, 0]], dtype=np.float64))
from panda3d.core import Triangulator, LPoint2d
# tr = Triangulator()
# for vertex in outerpolygon_contour_points:
# vi = tr.addVertex(vertex[0], vertex[1])
# tr.addPolygonVertex(vi)
# tr.beginHole()
# for vertex in inner_hole_contour_points:
# vi = tr.addVertex(vertex[0], vertex[1])
# tr.addHoleVertex(vi)
# tr.triangulate()
# vertices = tr.getVertices()
# indices = []
# num_triangles = tr.getNumTriangles()
# for i in range(num_triangles):
# indices.append([tr.getTriangleV0(i), tr.getTriangleV1(i), tr.getTriangleV2(i)])
# Own Geometry
# format = GeomVertexFormat.getV3c4t2()
format = GeomVertexFormat.getV3c4()
vdata = GeomVertexData("colored_polygon", format, Geom.UHStatic)
vdata.setNumRows(4)
# let's also add color to each vertex
colorWriter = GeomVertexWriter(vdata, "color")
vertexPosWriter = GeomVertexWriter(vdata, "vertex")
for v in outerpolygon_contour_points:
vertexPosWriter.addData3f(v[0], 0, v[1])
colorWriter.addData4f(color_vec4)
for v in inner_hole_contour_points:
vertexPosWriter.addData3f(v[0], 0, v[1])
colorWriter.addData4f(color_vec4)
# make primitives and assign vertices to them (primitives and primitive
# groups can be made independently from vdata, and are later assigned
# to vdata)
# tris = GeomTriangles(Geom.UHStatic)
tris = GeomLinestrips(Geom.UHStatic)
# for index_triple in indices:
# tris.addVertices(index_triple[0], index_triple[1], index_triple[2])
tris.add_consecutive_vertices(0, len(outerpolygon_contour_points))
tris.closePrimitive()
tris.add_consecutive_vertices(len(outerpolygon_contour_points), len(inner_hole_contour_points))
tris.closePrimitive()
# make a Geom object to hold the primitives
polygonGeom = Geom(vdata) # vdata contains the vertex position/color/... buffers
polygonGeom.addPrimitive(tris) # tris contains the index buffer
# now put quadGeom in a GeomNode. You can now position your geometry
# in the scene graph.
polygonGeomNode = GeomNode("colored_polygon_node")
polygonGeomNode.addGeom(polygonGeom)
return polygonGeomNode
