def timer(self):
phi = 2 * pi * get_elapsed_time() / 20.0
self.shader.modelview_matrix = ((cos(phi), 0, sin(phi), 0),
(0, 1, 0, 0), (-sin(phi), 0, cos(phi),
0), (0, 0, 0, 1))
self.window.add_timer(10, self.timer)
self.window.post_redisplay()
def timer(self):
t = min(1.0, (get_elapsed_time() - self.transition_start) / self.transition_time)
x = 0.5 - 0.5 * cos(pi * t)
self.shader.minval = self.minstart * (1 - x) + self.minend * x
self.shader.maxval = self.maxstart * (1 - x) + self.maxend * x
if t < 1:
self.window.add_timer(self.update_step, self.timer)
self.window.post_redisplay()
def timer(self):
t = min(1.0, (get_elapsed_time() - self.transition_start) /
self.transition_time)
x = 0.5 - 0.5 * cos(pi * t)
self.shader.minval = self.minstart * (1 - x) + self.minend * x
self.shader.maxval = self.maxstart * (1 - x) + self.maxend * x
if t < 1:
self.window.add_timer(self.update_step, self.timer)
self.window.post_redisplay()
def timer(self):
# We first get the elapsed time from GLUT using <code>get_elapsed_time()</code>:
phi = 2 * pi * get_elapsed_time() / 20.0
# We then set the <code>modelview_matrix</code> uniform variable of the
# shader simply by setting an attribute:
self.shader.modelview_matrix = ((cos(phi), 0, sin(phi), 0), (0, 1, 0, 0), (-sin(phi), 0, cos(phi), 0), (0, 0, 0, 1))
# The following line schedules the next timer event to execute after ten milliseconds.
self.window.add_timer(10, self.timer)
# Finally, we tell GLUT to redraw the screen.
self.window.post_redisplay()
def timer(self):
phi = 2 * pi * get_elapsed_time() / 20.0
self.shader.modelview_matrix = ((cos(phi), 0, sin(phi), 0), (0, 1, 0, 0), (-sin(phi), 0, cos(phi), 0), (0, 0, 0, 1))
self.window.add_timer(10, self.timer)
self.window.post_redisplay()
def start_transition(self, minval, maxval):
self.minstart, self.maxstart = self.shader.minval, self.shader.maxval
self.minend, self.maxend = minval, maxval
self.transition_start = get_elapsed_time()
self.timer()
def start_transition(self, minval, maxval):
self.minstart, self.maxstart = self.shader.minval, self.shader.maxval
self.minend, self.maxend = minval, maxval
self.transition_start = get_elapsed_time()
self.timer()