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src/hydro_space.c

+/*******************************************************************************
+ * This file is part of SWIFT.
+ * Copyright (c) 2017 Bert Vandenbroucke (bert.vandenbroucke@gmail.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ ******************************************************************************/
+
+#include "hydro_space.h"
+#include "space.h"
+
+/**
+ * @brief Initialize the extra space information needed for some hydro schemes.
+ *
+ * @param hs #hydro_space to initialize.
+ * @param s #space containing the hydro space.
+ */
+#ifdef SHADOWFAX_SPH
+__attribute__((always_inline)) INLINE void hydro_space_init(
+    struct hydro_space *hs, const struct space *s) {
+
+  if (s->periodic) {
+    hs->anchor[0] = -0.5f * s->dim[0];
+    hs->anchor[1] = -0.5f * s->dim[1];
+    hs->anchor[2] = -0.5f * s->dim[2];
+    hs->side[0] = 2.0f * s->dim[0];
+    hs->side[1] = 2.0f * s->dim[1];
+    hs->side[2] = 2.0f * s->dim[2];
+  } else {
+    hs->anchor[0] = 0.0f;
+    hs->anchor[1] = 0.0f;
+    hs->anchor[2] = 0.0f;
+    hs->side[0] = s->dim[0];
+    hs->side[1] = s->dim[1];
+    hs->side[2] = s->dim[2];
+  }
+}
+#else
+__attribute__((always_inline)) INLINE void hydro_space_init(
+    struct hydro_space *hs, const struct space *s) {}
+#endif

src/hydro_space.h

+/*******************************************************************************
+ * This file is part of SWIFT.
+ * Copyright (c) 2017 Bert Vandenbroucke (bert.vandenbroucke@gmail.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ ******************************************************************************/
+#ifndef SWIFT_HYDRO_SPACE_H
+#define SWIFT_HYDRO_SPACE_H
+
+#include "../config.h"
+
+struct space;
+
+/**
+ * @brief Extra space information that is needed for some hydro schemes.
+ */
+#ifdef SHADOWFAX_SPH
+struct hydro_space {
+  /*! Anchor of the simulation space. */
+  double anchor[3];
+
+  /*! Side lengths of the simulation space. */
+  double side[3];
+};
+#else
+struct hydro_space {};
+#endif
+
+void hydro_space_init(struct hydro_space *hs, const struct space *s);
+
+#endif /* SWIFT_HYDRO_SPACE_H */