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Pinwheel: Use sin/cos16_t

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Brandon502 2025-02-24 21:51:49 -05:00
parent e7e0eb0f32
commit 80061e8d76
1 changed files with 2 additions and 2 deletions
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wled00/FX_fcn.cpp
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@ -694,8 +694,8 @@ static void setPinwheelParameters(int i, int vW, int vH, int& startx, int& start
for (int k = 0; k < 2; k++) // angular steps for two consecutive rays for (int k = 0; k < 2; k++) // angular steps for two consecutive rays
{ {
int angle = (i + k) * baseAngle + rotate; int angle = (i + k) * baseAngle + rotate;
cosVal[k] = (cos16(angle) * Fixed_Scale) >> 15; // step per pixel in fixed point, cos16 output is -0x7FFF to +0x7FFF cosVal[k] = (cos16_t(angle) * Fixed_Scale) >> 15; // step per pixel in fixed point, cos16 output is -0x7FFF to +0x7FFF
sinVal[k] = (sin16(angle) * Fixed_Scale) >> 15; // using explicit bit shifts as dividing negative numbers is not equivalent (rounding error is acceptable) sinVal[k] = (sin16_t(angle) * Fixed_Scale) >> 15; // using explicit bit shifts as dividing negative numbers is not equivalent (rounding error is acceptable)
} }
startx = (vW * Fixed_Scale) / 2; // + cosVal[0] / 4; // starting position = center + 1/4 pixel (in fixed point) startx = (vW * Fixed_Scale) / 2; // + cosVal[0] / 4; // starting position = center + 1/4 pixel (in fixed point)
starty = (vH * Fixed_Scale) / 2; // + sinVal[0] / 4; starty = (vH * Fixed_Scale) / 2; // + sinVal[0] / 4;