Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/mantaflow/preprocessed/fastmarch.h

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+
+
+// DO NOT EDIT !
+// This file is generated using the MantaFlow preprocessor (prep generate).
+
+/******************************************************************************
+ *
+ * MantaFlow fluid solver framework
+ * Copyright 2011 Tobias Pfaff, Nils Thuerey
+ *
+ * This program is free software, distributed under the terms of the
+ * Apache License, Version 2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Fast marching
+ *
+ ******************************************************************************/
+
+#ifndef _FASTMARCH_H
+#define _FASTMARCH_H
+
+#include <queue>
+#include "levelset.h"
+
+namespace Manta {
+
+//! Fast marching. Transport certain values
+//  This class exists in two versions: for scalar, and for vector values - the only difference are
+//  flag checks i transpTouch (for simplicity in separate classes)
+
+template<class GRID, class T>
+inline T fmInterpolateNeighbors(GRID *mpVal, int x, int y, int z, Real *weights)
+{
+  T val(0.);
+  if (weights[0] > 0.0)
+    val += mpVal->get(x + 1, y + 0, z + 0) * weights[0];
+  if (weights[1] > 0.0)
+    val += mpVal->get(x - 1, y + 0, z + 0) * weights[1];
+  if (weights[2] > 0.0)
+    val += mpVal->get(x + 0, y + 1, z + 0) * weights[2];
+  if (weights[3] > 0.0)
+    val += mpVal->get(x + 0, y - 1, z + 0) * weights[3];
+  if (mpVal->is3D()) {
+    if (weights[4] > 0.0)
+      val += mpVal->get(x + 0, y + 0, z + 1) * weights[4];
+    if (weights[5] > 0.0)
+      val += mpVal->get(x + 0, y + 0, z - 1) * weights[5];
+  }
+  return val;
+}
+
+template<class GRID, class T> class FmValueTransportScalar {
+ public:
+  FmValueTransportScalar() : mpVal(0), mpFlags(0){};
+  ~FmValueTransportScalar(){};
+  void initMarching(GRID *val, FlagGrid *flags)
+  {
+    mpVal = val;
+    mpFlags = flags;
+  }
+  inline bool isInitialized()
+  {
+    return mpVal != 0;
+  }
+
+  //! cell is touched by marching from source cell
+  inline void transpTouch(int x, int y, int z, Real *weights, Real time)
+  {
+    if (!mpVal || !mpFlags->isEmpty(x, y, z))
+      return;
+    T val = fmInterpolateNeighbors<GRID, T>(mpVal, x, y, z, weights);
+    (*mpVal)(x, y, z) = val;
+  };
+
+ protected:
+  GRID *mpVal;
+  FlagGrid *mpFlags;
+};
+
+template<class GRID, class T> class FmValueTransportVec3 {
+ public:
+  FmValueTransportVec3() : mpVal(0), mpFlags(0){};
+  ~FmValueTransportVec3(){};
+  inline bool isInitialized()
+  {
+    return mpVal != 0;
+  }
+  void initMarching(GRID *val, const FlagGrid *flags)
+  {
+    mpVal = val;
+    mpFlags = flags;
+  }
+
+  //! cell is touched by marching from source cell
+  inline void transpTouch(int x, int y, int z, Real *weights, Real time)
+  {
+    if (!mpVal || !mpFlags->isEmpty(x, y, z))
+      return;
+
+    T val = fmInterpolateNeighbors<GRID, T>(mpVal, x, y, z, weights);
+
+    // set velocity components if adjacent is empty
+    if (mpFlags->isEmpty(x - 1, y, z))
+      (*mpVal)(x, y, z).x = val.x;
+    if (mpFlags->isEmpty(x, y - 1, z))
+      (*mpVal)(x, y, z).y = val.y;
+    if (mpVal->is3D()) {
+      if (mpFlags->isEmpty(x, y, z - 1))
+        (*mpVal)(x, y, z).z = val.z;
+    }
+  };
+
+ protected:
+  GRID *mpVal;
+  const FlagGrid *mpFlags;
+};
+
+class FmHeapEntryOut {
+ public:
+  Vec3i p;
+  // quick time access for sorting
+  Real time;
+  static inline bool compare(const Real x, const Real y)
+  {
+    return x > y;
+  }
+
+  inline bool operator<(const FmHeapEntryOut &o) const
+  {
+    const Real d = fabs((time) - ((o.time)));
+    if (d > 0.)
+      return (time) > ((o.time));
+    if (p.z != o.p.z)
+      return p.z > o.p.z;
+    if (p.y != o.p.y)
+      return p.y > o.p.y;
+    return p.x > o.p.x;
+  };
+};
+
+class FmHeapEntryIn {
+ public:
+  Vec3i p;
+  // quick time access for sorting
+  Real time;
+  static inline bool compare(const Real x, const Real y)
+  {
+    return x < y;
+  }
+
+  inline bool operator<(const FmHeapEntryIn &o) const
+  {
+    const Real d = fabs((time) - ((o.time)));
+    if (d > 0.)
+      return (time) < ((o.time));
+    if (p.z != o.p.z)
+      return p.z < o.p.z;
+    if (p.y != o.p.y)
+      return p.y < o.p.y;
+    return p.x < o.p.x;
+  };
+};
+
+//! fast marching algorithm wrapper class
+template<class T, int TDIR> class FastMarch {
+
+ public:
+  // MSVC doesn't allow static const variables in template classes
+  static inline Real InvalidTime()
+  {
+    return -1000;
+  }
+  static inline Real InvtOffset()
+  {
+    return 500;
+  }
+
+  enum SpecialValues { FlagInited = 1, FlagIsOnHeap = 2 };
+
+  FastMarch(const FlagGrid &flags,
+            Grid<int> &fmFlags,
+            Grid<Real> &levelset,
+            Real maxTime,
+            MACGrid *velTransport = nullptr);
+  ~FastMarch()
+  {
+  }
+
+  //! advect level set function with given velocity */
+  void performMarching();
+
+  //! test value for invalidity
+  inline bool isInvalid(Real v) const
+  {
+    return (v <= InvalidTime());
+  }
+
+  void addToList(const Vec3i &p, const Vec3i &src);
+
+  //! convert phi to time value
+  inline Real phi2time(Real phival)
+  {
+    return (phival - InvalidTime() + InvtOffset()) * -1.0;
+  }
+
+  //! ... and back
+  inline Real time2phi(Real tval)
+  {
+    return (InvalidTime() - InvtOffset() - tval);
+  }
+
+  inline Real _phi(int i, int j, int k)
+  {
+    return mLevelset(i, j, k);
+  }
+
+ protected:
+  Grid<Real> &mLevelset;
+  const FlagGrid &mFlags;
+  Grid<int> &mFmFlags;
+
+  //! velocity extrpolation
+  FmValueTransportVec3<MACGrid, Vec3> mVelTransport;
+
+  //! maximal time to march for
+  Real mMaxTime;
+
+  //! fast marching list
+  std::priority_queue<T, std::vector<T>, std::less<T>> mHeap;
+  Real mReheapVal;
+
+  //! weights for touching points
+  Real mWeights[6];
+
+  template<int C> inline Real calcWeights(int &okCnt, int &invcnt, Real *v, const Vec3i &idx);
+
+  inline Real calculateDistance(const Vec3i &pos);
+};
+
+}  // namespace Manta
+#endif