Re: trigonometry in audio games, how do I apply the concept?
Depends. Generally you'd have variables to store position and rotation, and then set the listener/objects position and rotation based on those stored variables. In the case of my Minecraft Prototype, whenever the mouse is moved it stores that movement in a rotation variable, then it uses that variable to move the perspective of the window and/or listener:
def on_mouse_motion(self, x, y, dx, dy):
""" Called when the player moves the mouse.
Parameters
----------
x, y : int
The coordinates of the mouse click. Always center of the screen if
the mouse is captured.
dx, dy : float
The movement of the mouse.
"""
if self.exclusive:
m = 0.15
x, y = self.rotation
x, y = x + dx * m, y + dy * m
y = max(-90, min(90, y))
if x < -360:
x += 360
elif x > 360:
x -= 360
self.rotation = [x, y]
def set_3d(self):
""" Configure OpenGL to draw in 3d.
"""
width, height = self.get_size()
glEnable(GL_DEPTH_TEST)
glViewport(0, 0, width, height)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(65.0, width / float(height), 0.1, 20.0)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
x, y = self.rotation
glRotatef(x, 0, 1, 0)
glRotatef(-y, math.cos(math.radians(x)), 0, math.sin(math.radians(x)))
x, y, z = self.position
glTranslatef(-x, -y, -z)Since the position of the listener is changing, you don't really need to calculate the distance between the two, unless you want some sort of special interaction or behavior you want to trigger as a result. In the Minexcraft prototype I calculated the distance between the player and a block and adjusted the volume of a sound to represent that distance, the little bit of code for that is here:
#used to calculate distance between player and block
def calculateDistance(x1,y1,x2,y2):
return math.sqrt((x2 - x1)**2 + (y2 - y1)**2)_______________________________________________ Audiogames-reflector mailing list Audiogames-reflector@sabahattin-gucukoglu.com https://sabahattin-gucukoglu.com/cgi-bin/mailman/listinfo/audiogames-reflector
