from pandac.PandaModules import * from direct.motiontrail.MotionTrail import * import random class PolyTrail(NodePath): def __init__(self, root_node_path = None, vertex_list = None, color_list = None, time_window = 0.25): NodePath.__init__(self, 'PolyTrail') self.time_window = time_window self.root_node_path = root_node_path if not self.root_node_path: self.root_node_path = render self.vertex_list = vertex_list if not self.vertex_list: self.vertex_list = [Vec4(0.0, 0.4, 0.0, 1.0), Vec4(0.0, 2.0, 0.0, 1.0)] self.color_list = color_list if not self.color_list: self.color_list = [] for i in self.vertex_list: self.color_list.append(Vec4(0.1, 0.2, 0.4, 1.0)) self.motion_trail = None self.motion_trail_vertex = None self.addMotionTrail() self.setVertexColors(self.color_list) self.setTimeWindow(self.time_window) self.motion_trail.attach_motion_trail() return def destroy(self): self.removeMotionTrail() self.removeNode() self.root_node_path = None self.motion_trail = None self.vertex_list = None self.motion_trail_vertex = None return def beginTrail(self): if self.motion_trail: self.motion_trail.begin_motion_trail() def endTrail(self): if self.motion_trail: self.motion_trail.end_motion_trail() self.motion_trail.time_window = self.time_window def removeMotionTrail(self): self.endTrail() if self.motion_trail: self.motion_trail.unregister_motion_trail() self.motion_trail.delete() self.motion_trail = None if self.motion_trail_vertex: self.motion_trail_vertex = None return def addMotionTrail(self): if not self.motion_trail: self.motion_trail = MotionTrail('motion_trail', self) self.motion_trail.root_node_path = self.root_node_path if False: axis = loader.loadModel('models/misc/xyzAxis') axis.reparentTo(self) def test_vertex_function(motion_trail_vertex, vertex_id, context): return self.vertex_list[vertex_id] index = 0 total_test_vertices = len(self.vertex_list) while index < total_test_vertices: self.motion_trail_vertex = self.motion_trail.add_vertex(index, test_vertex_function, None) if True: if index == 0: self.motion_trail_vertex.start_color = Vec4(0.0, 0.25, 0.0, 1.0) self.motion_trail_vertex.end_color = Vec4(0.0, 0.0, 0.0, 1.0) if index == 1: self.motion_trail_vertex.start_color = Vec4(0.25, 0.0, 0.0, 1.0) self.motion_trail_vertex.end_color = Vec4(0.0, 0.0, 0.0, 1.0) if index == 2: self.motion_trail_vertex.start_color = Vec4(0.0, 0.0, 1.0, 1.0) self.motion_trail_vertex.end_color = Vec4(0.0, 0.0, 0.0, 1.0) if index == 3: self.motion_trail_vertex.start_color = Vec4(0.0, 1.0, 1.0, 1.0) self.motion_trail_vertex.end_color = Vec4(0.0, 0.0, 0.0, 1.0) if index == 4: self.motion_trail_vertex.start_color = Vec4(1.0, 1.0, 0.0, 1.0) self.motion_trail_vertex.end_color = Vec4(0.0, 0.0, 0.0, 1.0) index += 1 self.motion_trail.update_vertices() self.motion_trail.calculate_relative_matrix = True self.motion_trail.time_window = self.time_window self.motion_trail.continuous_motion_trail = False self.motion_trail.end_motion_trail() self.motion_trail.register_motion_trail() if False: axis = Vec3(0.0, 0.0, 1.0) time = 0.0 angle = (1.0 - time) * 90.0 matrix = Mat4.rotateMat(angle, axis) self.motion_trail.update_motion_trail(time, matrix) time = 0.2 angle = (1.0 - time) * 90.0 matrix = Mat4.rotateMat(angle, axis) self.motion_trail.update_motion_trail(time, matrix) time = 0.4 angle = (1.0 - time) * 90.0 matrix = Mat4.rotateMat(angle, axis) self.motion_trail.update_motion_trail(time, matrix) time = 0.6 angle = (1.0 - time) * 90.0 matrix = Mat4.rotateMat(angle, axis) self.motion_trail.update_motion_trail(time, matrix) time = 0.8 angle = (1.0 - time) * 90.0 matrix = Mat4.rotateMat(angle, axis) self.motion_trail.update_motion_trail(time, matrix) time = 1.0 angle = (1.0 - time) * 90.0 matrix = Mat4.rotateMat(angle, axis) self.motion_trail.update_motion_trail(time, matrix) return def setVertexColors(self, color_list): if self.motion_trail: black = Vec4(0.0, 0.0, 0.0, 1.0) scale_array = [0.25, 0.4, 0.7, 1.0] total_scales = len(scale_array) for index in range(len(color_list)): color = color_list[index] if index < total_scales: scale = scale_array[index] * 0.75 else: scale = 1.0 scaled_color = Vec4(color[0] * scale, color[1] * scale, color[2] * scale, 1.0) self.motion_trail.set_vertex_color(index, scaled_color, black) def setUnmodifiedVertexColors(self, color_list): if self.motion_trail: for index in range(len(color_list)): color = color_list[index] self.motion_trail.set_vertex_color(index, color, color) def setTimeWindow(self, time_window): if self.motion_trail: self.motion_trail.time_window = time_window def setUseNurbs(self, val): self.motion_trail.use_nurbs = val def setTexture(self, texture): if self.motion_trail: self.motion_trail.set_texture(texture) def setBlendModeOn(self): if self.motion_trail: self.motion_trail.geom_node_path.node().setAttrib(ColorBlendAttrib.make(ColorBlendAttrib.MAdd, ColorBlendAttrib.OIncomingAlpha, ColorBlendAttrib.OOne)) def setBlendModeOff(self): if self.motion_trail: self.motion_trail.geom_node_path.node().setAttrib(ColorBlendAttrib.make(ColorBlendAttrib.MNone))