diff options
Diffstat (limited to 'lib/rng.go')
| -rw-r--r-- | lib/rng.go | 16 |
1 files changed, 8 insertions, 8 deletions
@@ -21,7 +21,7 @@ var mtF uint32 = 1812433253 // MT19937 instance struct type MTRand struct { - genSt [624]uint32 + GenSt [624]uint32 index uint32 initialized bool } @@ -31,10 +31,10 @@ var mtUpperMask uint32 = 0xFFFFFFFF & (^mtLowerMask) func (r *MTRand) Seed(s uint32) { r.index = mtCoefN - r.genSt[0] = s + r.GenSt[0] = s for i := uint32(1); i < mtCoefN; i++ { - r.genSt[i] = (0xFFFFFFFF & - (mtF*(r.genSt[i-1]^(r.genSt[i-1]>>(mtCoefW-2))) + i)) + r.GenSt[i] = (0xFFFFFFFF & + (mtF*(r.GenSt[i-1]^(r.GenSt[i-1]>>(mtCoefW-2))) + i)) } r.initialized = true } @@ -47,7 +47,7 @@ func (r *MTRand) Extract() uint32 { r.twist() } - y := r.genSt[r.index] + y := r.GenSt[r.index] y = y ^ ((y >> mtCoefU) & mtCoefD) y = y ^ ((y << mtCoefS) & mtCoefB) y = y ^ ((y << mtCoefT) & mtCoefC) @@ -61,13 +61,13 @@ func (r *MTRand) Extract() uint32 { func (r *MTRand) twist() { for i := uint32(0); i < mtCoefN-1; i++ { - x := (r.genSt[i] & mtUpperMask) + - (r.genSt[(i+1)%mtCoefN] & mtLowerMask) + x := (r.GenSt[i] & mtUpperMask) + + (r.GenSt[(i+1)%mtCoefN] & mtLowerMask) xA := x >> 1 if x%2 != 0 { // lowest bit of x is 1 xA = xA ^ mtCoefA } - r.genSt[i] = r.genSt[(i+mtCoefM)%mtCoefN] ^ xA + r.GenSt[i] = r.GenSt[(i+mtCoefM)%mtCoefN] ^ xA } r.index = 0 } |