public Vector4 GetForceAndHeightAt(float x, float z, float spectrumStart, float spectrumEnd, float time)
{
vector4 result = new vector4();
x = -(x + surfaceOffset.x);
z = -(z + surfaceOffset.y);
// sample FFT results
if (spectrumStart == 0.0f)
{
for (int scaleIndex = numTiles - 1; scaleIndex >= 0; --scaleIndex)
{
if (tileSpectra[scaleIndex].resolveByFFT)
{
float fx, invFx, fy, invFy, t; int index0, index1, index2, index3;
Vector2[] da, db; vector4[] fa, fb;
lock (tileSpectra[scaleIndex])
{
InterpolationParams(x, z, scaleIndex, windWaves.TileSizes[scaleIndex], out fx, out invFx, out fy, out invFy, out index0, out index1, out index2, out index3);
tileSpectra[scaleIndex].GetResults(time, out da, out db, out fa, out fb, out t);
}
result += FastMath.Interpolate(
fa[index0], fa[index1], fa[index2], fa[index3],
fb[index0], fb[index1], fb[index2], fb[index3],
fx, invFx, fy, invFy, t
);
}
}
}
// sample waves directly
if (filteredCpuWavesCount != 0)
{
SampleWavesDirectly(spectrumStart, spectrumEnd, (cpuWaves, startIndex, endIndex) =>
{
Vector4 subResult = new Vector4();
for (int i = startIndex; i < endIndex; ++i)
{
cpuWaves[i].GetForceAndHeightAt(x, z, time, ref subResult);
}
#if WATER_SIMD
result += new vector4(subResult.x, subResult.y, subResult.z, subResult.w);
#else
result += subResult;
#endif
});
}
float horizontalScale = water.HorizontalDisplacementScale * uniformWaterScale;
#if WATER_SIMD
return(new Vector4(result.X * horizontalScale, result.Y * 0.5f, result.Z * horizontalScale, result.W));
#else
result.x = result.x * horizontalScale;
result.z = result.z * horizontalScale;
result.y *= 0.5f * uniformWaterScale;
result.w *= uniformWaterScale; // not 100% sure about this
return(result);
#endif
}
public Vector3 GetDisplacementAt(float x, float z, float spectrumStart, float spectrumEnd, float time)
{
Vector3 result = new Vector3();
x = -(x + surfaceOffset.x);
z = -(z + surfaceOffset.y);
// sample FFT results
if (spectrumStart == 0.0f)
{
for (int scaleIndex = numTiles - 1; scaleIndex >= 0; --scaleIndex)
{
if (tileSpectra[scaleIndex].resolveByFFT)
{
float fx, invFx, fy, invFy, t; int index0, index1, index2, index3;
Vector2[] da, db; vector4[] fa, fb;
lock (tileSpectra[scaleIndex])
{
InterpolationParams(x, z, scaleIndex, windWaves.TileSizes[scaleIndex], out fx, out invFx, out fy, out invFy, out index0, out index1, out index2, out index3);
tileSpectra[scaleIndex].GetResults(time, out da, out db, out fa, out fb, out t);
}
Vector2 subResult = FastMath.Interpolate(
ref da[index0], ref da[index1], ref da[index2], ref da[index3],
ref db[index0], ref db[index1], ref db[index2], ref db[index3],
fx, invFx, fy, invFy, t
);
result.x -= subResult.x;
result.z -= subResult.y;
#if WATER_SIMD
result.y += FastMath.Interpolate(
fa[index0].W, fa[index1].W, fa[index2].W, fa[index3].W,
fb[index0].W, fb[index1].W, fb[index2].W, fb[index3].W,
fx, invFx, fy, invFy, t
);
#else
result.y += FastMath.Interpolate(
fa[index0].w, fa[index1].w, fa[index2].w, fa[index3].w,
fb[index0].w, fb[index1].w, fb[index2].w, fb[index3].w,
fx, invFx, fy, invFy, t
);
#endif
}
}
}
// sample waves directly
if (filteredCpuWavesCount != 0)
{
SampleWavesDirectly(spectrumStart, spectrumEnd, (cpuWaves, startIndex, endIndex) =>
{
Vector3 subResult = new Vector3();
for (int i = startIndex; i < endIndex; ++i)
{
subResult += cpuWaves[i].GetDisplacementAt(x, z, time);
}
result += subResult;
});
}
float horizontalScale = -water.HorizontalDisplacementScale * uniformWaterScale;
result.x = result.x * horizontalScale;
result.y *= uniformWaterScale;
result.z = result.z * horizontalScale;
return(result);
}