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use sin lookup table to fix terrible performance with float and tipsy performance on some archs

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This commit is contained in:
Chris Danford
2005-03-22 00:58:05 +00:00
parent 1ce86551bd
commit 7ca20486ef
9 changed files with 120 additions and 74 deletions
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stepmania/src/MusicWheel.cpp
+4 -4
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@@ -785,16 +785,16 @@ void MusicWheel::GetItemPosition( float fPosOffsetsFromMiddle, float& fX_out, fl
{
const float curve = CIRCLE_PERCENT*2*PI;
fRotationX_out = SCALE(fPosOffsetsFromMiddle,-NUM_WHEEL_ITEMS/2.0f,+NUM_WHEEL_ITEMS/2.0f,-curve/2.f,+curve/2.f);
fX_out = (1-cosf(fPosOffsetsFromMiddle/PI))*ITEM_CURVE_X;
fY_out = WHEEL_3D_RADIUS*sinf(fRotationX_out);
fZ_out = -100+WHEEL_3D_RADIUS*cosf(fRotationX_out);
fX_out = (1-RageFastCos(fPosOffsetsFromMiddle/PI))*ITEM_CURVE_X;
fY_out = WHEEL_3D_RADIUS*RageFastSin(fRotationX_out);
fZ_out = -100+WHEEL_3D_RADIUS*RageFastCos(fRotationX_out);
fRotationX_out *= 180.f/PI; // to degrees
// printf( "fRotationX_out = %f\n", fRotationX_out );
}
else if(!USE_LINEAR_WHEEL)
{
fX_out = (1-cosf(fPosOffsetsFromMiddle/PI))*ITEM_CURVE_X;
fX_out = (1-RageFastCos(fPosOffsetsFromMiddle/PI))*ITEM_CURVE_X;
fY_out = fPosOffsetsFromMiddle*ITEM_SPACING_Y;
fZ_out = 0;
fRotationX_out = 0;