diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libnr/nr-gradient.cpp | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/src/libnr/nr-gradient.cpp b/src/libnr/nr-gradient.cpp index cd771e7de..6ca817401 100644 --- a/src/libnr/nr-gradient.cpp +++ b/src/libnr/nr-gradient.cpp @@ -30,13 +30,13 @@ #define NRG_MASK (NR_GRADIENT_VECTOR_LENGTH - 1) #define NRG_2MASK ((long long) ((NR_GRADIENT_VECTOR_LENGTH << 1) - 1)) -static guint32 msr_state=0xfefefefe; +static guint32 mls_state=0xa37e5375; -inline guint32 msr_next() { - guint32 lsb = msr_state & 1; - guint32 msb = ( lsb << 31 ) ^ ( ( msr_state & 2) << 30 ); - msr_state = ( msr_state >> 1 ) | msb; - return lsb; +inline NR::Coord noise() { + guint32 lsb = mls_state & 1; + guint32 msb = ( lsb << 31 ) ^ ( ( mls_state & 2) << 30 ); + mls_state = ( mls_state >> 1 ) | msb; + return lsb * 1.75; } inline unsigned char const *index_to_pointer(int idx, @@ -48,21 +48,21 @@ inline unsigned char const *index_to_pointer(int idx, inline unsigned char const *r_to_pointer_pad(NR::Coord r, unsigned char const *vector) { - r += msr_next(); + r += noise(); return index_to_pointer((int)CLAMP(r, 0, (double)(NR_GRADIENT_VECTOR_LENGTH - 1)), vector); } inline unsigned char const *r_to_pointer_repeat(NR::Coord r, unsigned char const *vector) { - r += msr_next(); + r += noise(); return index_to_pointer((int)((long long)r & NRG_MASK), vector); } inline unsigned char const *r_to_pointer_reflect(NR::Coord r, unsigned char const *vector) { - r += msr_next(); + r += noise(); int idx = (int) ((long long)r & NRG_2MASK); if (idx > NRG_MASK) idx = NRG_2MASK - idx; return index_to_pointer(idx, vector); |