def __init__(self):
''' The work of maintaining the visible stars at different locations while
zooming around the galaxy has been delegated to this class
'''
self.v = []
self.names = {
} # most stars are unamed so it is more efficient to use a dictionary
with open('models/hygdata001.csv',
'r') as f: # read the data from the file
for i, l in enumerate(f.readlines()):
ln = l.split(',')
if ln[0] > '':
self.names[i] = '' + ln[5] + ' ' + ln[
0] # named star, prefix with constellation
if ln[1] == '': # no blue value, use a mid
ln[1] = '0.6'
self.v.append(
[float(ln[2]), float(ln[4]),
float(ln[3])] + # z and y swapped to OpenGL orientation.
self.bv2rgb(float(ln[1])) + [float(vi) for vi in ln[6:7]] +
[1.0 * i]) # last value is for index to names
self.v = np.array(self.v, dtype='float32') # and convert to ndarray
self.xm, self.ym, self.zm = 0.2, 0.0, -2.0
self.verts, self.norms, self.texs = None, None, None
self.stars = None
self.ready = False
self.select_visible() # initial run, one off
self.stars = pi3d.Points(vertices=self.verts,
normals=self.norms,
tex_coords=self.texs,
point_size=15)
starsh = pi3d.Shader(
"shaders/star_point") #shader uses rgb and luninosity
self.stars.set_shader(starsh)
def position_and_draw(self):
self.position(self.pos[0], self.pos[1], self.pos[2])
self.rotateIncY(self.rotation)
self.draw()
if self.shell != None:
self.shell.position(self.pos[0], self.pos[1], self.pos[2])
self.shell.rotateIncY(self.shell.rotation)
self.shell.draw()
if self.track_shader != None:
self.t_len += 1
self.t_v.append(tuple(self.pos))
if (self.t_len % 300) == 0:
# NB the Points class was only added in pi3d v.1.4 2013/10/17
self.trace_shape = pi3d.Points(vertices=self.t_v,
material=(1.0, 0.0, 1.0),
point_size=5)
self.trace_shape.set_shader(self.track_shader)
if (self.t_len > 2400):
self.t_v = self.t_v[-2400:]
self.t_len = 2400
if self.trace_shape:
self.trace_shape.draw()
pi3d.Texture("textures/blu_ball.png"),
pi3d.Texture("textures/grn_ball.png")]
loc = np.zeros((MAX_BALLS, 3))
loc[:,0] = np.random.uniform(-HWIDTH, HWIDTH, MAX_BALLS)
loc[:,1] = np.random.uniform(-HHEIGHT, HHEIGHT, MAX_BALLS)
loc[:,2] = np.random.uniform(min_dist, max_dist, MAX_BALLS)
vel = np.random.uniform(-MAX_BALL_VELOCITY, MAX_BALL_VELOCITY, (MAX_BALLS, 2))
dia = (MIN_BALL_SIZE + (max_dist - loc[:,2]) /
(max_dist - min_dist) * (MAX_BALL_SIZE - MIN_BALL_SIZE))
mass = dia * dia
radii = np.add.outer(dia, dia) / 3.0 # should be / 2.0 this will make balls 'touch' when nearer
color = np.floor(np.random.uniform(0.0, 2.99999, (MAX_BALLS, 3)))
balls = pi3d.Points(vertices=loc, point_size=MAX_BALL_SIZE, normals=color)
balls.set_draw_details(shader, ballimg)
temperature = 0.6
interact = True
n = 0.0
l_tm = time.time()
while DISPLAY.loop_running():
balls.draw()
##### bounce off walls
ix = np.where(loc[:,0] < -HWIDTH) # off left side
vel[ix,0] = np.abs(vel[ix,0]) * temperature # x component +ve
ix = np.where(loc[:,0] > HWIDTH) # off right
vel[ix,0] = np.abs(vel[ix,0]) * -temperature # vx -ve
ix = np.where(loc[:,1] < -HHEIGHT)
vel[ix,1] = np.abs(vel[ix,1]) * temperature
radii = np.add.outer(
dia, dia) / 7.0 # should be / 2.0 this will make bugs 'touch' when nearer
rot = np.zeros((MAX_BUGS, 3)) # :,0 for rotation
rot[:, 1] = 999.999 # :,1 R, G
rot[:, 2] = 999.999 # :,2 B, A
""" :,2 for sub-size i.e 8x8 images each is 0.125 but there is 0.0125
margin on each side with 0.1 'useable' image inside. This is to avoid the
corners overlapping other images as they are rotated.
"""
uv = np.zeros((MAX_BUGS, 2)) # u picnum.u v
uv[:, :] = 0.0125 # all start off same. uv is top left corner of square
bugs = pi3d.Points(camera=CAMERA,
vertices=loc,
normals=rot,
tex_coords=uv,
point_size=MAX_BUG_SIZE)
bugs.set_draw_details(shader, [img])
bugs.unif[48] = 0.1
temperature = 0.9
interact = True
spin = False
frame_num = 0
while DISPLAY.loop_running():
bugs.draw()
frame_num += 1
##### bounce off walls
ix = np.where(loc[:, 0] < -HWIDTH) # off left side
z=180)
mysphere.set_draw_details(shader, [earthimg])
myplane = pi3d.Plane(w=500, h=500, name="stars", z=400)
myplane.set_draw_details(flatsh, [starsimg])
"""create the shape to hold the points. This could be encapsulated in its
own class to generate the required distribution and shield the user from
having to explicitly create the Buffer object and set the Shape.buf list
"""
verts = []
for i in xrange(30000):
verts.append(
(random.random() - 0.5, random.random() - 0.5, random.random() - 0.5))
# NB the Points class was only added in pi3d v.1.4 2013/10/17
mystars = pi3d.Points(vertices=verts,
material=(0.9, 0.9, 1.0),
point_size=50,
sx=100,
sy=100,
sz=500)
mystars.set_shader(matsh)
# Fetch key presses
mykeys = pi3d.Keyboard()
# Display scene
while DISPLAY.loop_running():
mysphere.rotateIncY(-0.5)
mysphere.positionZ(mysphere.z() - 0.5)
mystars.positionZ(mystars.z() - 0.5)
if mystars.z() < 75:
mystars.positionZ(250)
mysphere.positionZ(180)
mystars.draw()
shader = pi3d.Shader("shaders/uv_sprite")
ballimg = pi3d.Texture("textures/red_ball.png")
loc = np.zeros((MAX_BALLS, 3))
loc[:, 0] = np.random.uniform(-HWIDTH, HWIDTH, MAX_BALLS)
loc[:, 1] = np.random.uniform(-HHEIGHT, HHEIGHT, MAX_BALLS)
loc[:, 2] = np.random.uniform(min_dist, max_dist, MAX_BALLS)
vel = np.random.uniform(-MAX_BALL_VELOCITY, MAX_BALL_VELOCITY, (MAX_BALLS, 2))
dia = (MIN_BALL_SIZE + (max_dist - loc[:, 2]) / (max_dist - min_dist) *
(MAX_BALL_SIZE - MIN_BALL_SIZE))
mass = dia * dia
radii = np.add.outer(
dia, dia) / 3.0 # should be / 2.0 this will make balls 'touch' when nearer
balls = pi3d.Points(vertices=loc, point_size=MAX_BALL_SIZE)
balls.set_draw_details(shader, [ballimg])
temperature = 0.9
interact = False
while DISPLAY.loop_running():
balls.draw()
##### bounce off walls
ix = np.where(loc[:, 0] < -HWIDTH) # off left side
vel[ix, 0] = np.abs(vel[ix, 0]) * temperature # x component +ve
ix = np.where(loc[:, 0] > HWIDTH) # off right
vel[ix, 0] = np.abs(vel[ix, 0]) * -temperature # vx -ve
ix = np.where(loc[:, 1] < -HHEIGHT)
vel[ix, 1] = np.abs(vel[ix, 1]) * temperature
ix = np.where(loc[:, 1] > HHEIGHT)
