p3d_input_idea.py

#Panda3D input polling interface idea  

# When a keyboard/controller/mouse button is pressed/released/moved
# the values in base.inputs is updated.
# The keys are {device_name}-{button_name}
# The values for buttons are 1 or 0
forward = 'keyboard-w'
if base.inputs[forward]: 
    self.pc.set_y(self.pc, dt*move_speed)  

# if the 'button' is an analog axis, it's value in 0.0-1.0 is returned    
# each axis has 3 events/buttons(?), one for positive, one for negative values
# and one for a -1.0 +1.0 range 
# this way the same code will work for both analog axis and digital buttons
forward = 'gamepad-x_axis_positive'
back = 'gamepad-x_axis_negative'
if base.inputs[forward]:
    move_speed *= base.inputs[forward]
elif base.inputs[back]:
    move_speed *= -base.inputs[back]
else:
    move_speed *= 0.0
self.pc.set_y(self.pc, dt*move_speed)
# simpler, all in one, **but analog only**:
move_axis = 'gamepad-x_axis' # -1.0, +1.0 value range
if base.inputs[move_axis]:
    move_speed *= base.inputs[move_axis]    
    self.pc.set_y(self.pc, dt*move_speed)
    
# if the 'button' is the mouse    
# one can use 'x_delta'/'y_delta' or 'x_delta_positive' 
# to check how far the cursor moved since last frame 
# again, using the same logic   
forward = 'mouse-x_delta_positive'
if base.inputs[forward]:
    move_speed *= base.inputs[forward]
    self.pc.set_y(self.pc, dt*move_speed)

# the position of the mouse cursor should act like an axis of a gamepad/joystick
# but there also needs to be a way to detect if the mouse cursor is in the window
if base.inputs['mouse-x'] is not None:
    self.picker_ray.set_from_lens(self.camNode, base.inputs['mouse-x'], base.inputs['mouse-y'])
    
# The values can be compound using '&' (and)
# For example: move diagonally when A and W are pressed at the same time     
if base.inputs['keyboard-w&keyboard-a']: 
    self.pc.set_pos(self.pc, Point3(dt*move_speed, dt*move_speed, 0))  

# The values can be compound using '|' (or)     
# Use case - alternative binds    
forward = 'keyboard-w|gamepad-x_axis_positive'
if base.inputs[forward]:
    move_speed *= base.inputs[forward]
    self.pc.set_y(self.pc, dt*move_speed)