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| author | Johannes Schickel | 2013-06-08 21:25:18 +0200 |
|---|---|---|
| committer | Johannes Schickel | 2013-06-08 21:47:51 +0200 |
| commit | 21f87070afa31f30593e85a9ddd5fcb84c292ec8 (patch) | |
| tree | 5b6e1dbe3b60144de1abedc59bf556e38d550b8e | |
| parent | 190ec9c2b64c940272d2f3e207296ce3eaab043f (diff) | |
| download | scummvm-rg350-21f87070afa31f30593e85a9ddd5fcb84c292ec8.tar.gz scummvm-rg350-21f87070afa31f30593e85a9ddd5fcb84c292ec8.tar.bz2 scummvm-rg350-21f87070afa31f30593e85a9ddd5fcb84c292ec8.zip | |
COMMON: Fix regression in SineTable creation.
This is a regression from f4ba8a6485b097a8ef1e2004d1af127243f379f1. The
commit replaced the static cosine and sine tables with dynamically created
ones. In the process of that a copy&paste error happened which made the sine
table use the layout of the cosine table. This commit now changes the
dynamically created sine tables to conform to the layout of the previous
static tables.
| -rw-r--r-- | common/sinetables.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/common/sinetables.cpp b/common/sinetables.cpp index a6ec99469d..2198dbfd1a 100644 --- a/common/sinetables.cpp +++ b/common/sinetables.cpp @@ -36,13 +36,13 @@ SineTable::SineTable(int bitPrecision) { double freq = 2 * M_PI / m; _table = new float[m]; - // Table contains sin(2*pi*x/n) for 0<=x<=n/4, - // followed by its reverse - for (int i = 0; i <= m / 4; i++) + // Table contains sin(2*pi*i/m) for 0<=i<m/4, + // followed by m/2<=i<3m/4 + for (int i = 0; i < m / 4; i++) _table[i] = sin(i * freq); - for (int i = 1; i < m / 4; i++) - _table[m / 2 - i] = _table[i]; + for (int i = 0; i < m / 4; i++) + _table[m / 4 + i] = -_table[i]; } SineTable::~SineTable() { |