def _make_ribbon_mesh(self, x, y, w, h):
signal_power = np.square(self.data)
frames_per_pixel = int(self.frames_per_beat / HORIZ_SCALE)
scale_factor = frames_per_pixel * 2
pad_size = math.ceil(float(signal_power.size)/scale_factor)*scale_factor - signal_power.size
signal_power = np.append(signal_power, np.zeros(pad_size)*np.NaN)
print signal_power.shape
signal_power = signal_power.reshape(-1, scale_factor)
print signal_power.shape
signal_power = scipy.nanmean(signal_power, axis=1)
print signal_power.shape
signal_power /= np.max(signal_power)
print 'signal power', len(signal_power)
print signal_power[100:200]
print np.max(signal_power)
segments = self.blah_width
mesh = Mesh()
# create indices
mesh.indices = range(segments * 2 + 2)
# create vertices with evenly spaced texture coordinates
span = np.linspace(0.0, 1.0, segments + 1)
verts = []
mid_y = y + h/2
y_scale = h/2
idx = 0
for s in span:
height = y_scale * signal_power[idx]
verts += [x + s * w, mid_y - height, s, 0, x + s * w, mid_y + height, s, 1]
idx += 1
mesh.vertices = verts
# # animate a sine wave by setting the vert positions every frame:
# theta = 3.0 * self.time
# y = 300 + 50 * np.sin(np.linspace(theta, theta + 2 * np.pi, self.segments + 1))
# self.mesh.vertices[5::8] = y
# seems that you have to reassign the entire verts list in order for the change
# to take effect.
mesh.vertices = mesh.vertices
# # assign texture
# if tex_file:
# mesh.texture = Image(tex_file).texture
# standard triangle strip mode
mesh.mode = 'triangle_strip'
return mesh
def DrawTris(vertices, triangles, DrawCallback): #Arrange data in kivy internal mesh format vertMod = [] for i in range(len(vertices)/2): vertMod.extend((vertices[i*2], vertices[(i*2)+1], 0., 0.)) ind = [] for tri in triangles: ind.extend(tri) mesh = Mesh() mesh.vertices = vertMod mesh.indices = ind mesh.mode = "triangles" DrawCallback(mesh)