Re: Learning how to code free movement and panning in a game like Swamp.
Hm, You're right, I'm very lost on this code... I did however make it python 2 and 3 compliant I believe as well as sped it up to 1/3 it's original speed.
from math import cos, sin, sqrt, atan2, pi
def dot(a, b):
return (a[0]*b[0]) + (a[1]*b[1])
def magnitude(a):
"""returns the sqrt of a squared + b squared"""
return sqrt(a[0]**2 + a[1]**2)
def normalize(a):
m = magnitude(a)
return (a[0]/m, a[1]/m)
def pan_value(player_pos, player_facing, sound_pos):
player_facing = player_facing*(pi/180.0)
front = normalize((cos(player_facing), sin(player_facing)))
right = normalize((cos(player_facing-pi/2.0), sin(player_facing-pi/2.0)))
#translate the sound's position to be relative to the player
translated_pos = sound_pos[0]-pla
yer_pos[0], sound_pos[1]-player_pos[1]
#y is front because this gives an angle on the range 0 to pi instead of -pi/2 to pi/2
x= dot(right, translated_pos)
y = dot(front, translated_pos)
angle = atan2(y, x)
is_behind = y <0
return (cos(angle), is_behind)
print pan_value((5, 0), 0, (2, 0))
I guess with this many equasions, it is bound to be somewhat slow, but I don't think it matters when using pygame though as I don't think you can have more than 16 sounds going at once...
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