Rotation

# Linear Tranformation (rotation)

n=20

fastgraphics

Dim v (2,n)

Dim f (2,n)

Dim t (2,2)

# Initial vectors V

for i = 1 to n-1

v[0,i]=rand*100:v[1,i]=rand*100

next i

# Changing a

for a = 1 to 2*pi step .001

gosub rot

gosub mult

gosub plotting

next a

# Transformation Matrix

rot:

t[0,0]=cos(a):t[0,1]=-sin(a)

t[1,0]=sin(a):t[1,1]=Cos(a)

return

# F=V*T

mult:

for i = 1 to n-1

f[0,i]= v[0,i]*t[0,0]+v[1,i]*t[1,0]

f[1,i]= v[0,i]*t[0,1]+v[1,i]*t[1,1]

next i

return

# Ploting F

plotting:

clg

line 0,150,300,150

line 150,0,150,300

for i = 1 to n-1

circle f[0,i]+150,150-f[1,i],4

next i

refresh

return