add bullet define & include for scons makesrna, also move meshcache utils into own file.

1 files changed, 67 insertions, 0 deletions

diff --git a/source/blender/modifiers/intern/MOD_meshcache_util.c b/source/blender/modifiers/intern/MOD_meshcache_util.c
new file mode 100644
index 00000000000..9068eb87581
--- /dev/null
+++ b/source/blender/modifiers/intern/MOD_meshcache_util.c
@@ -0,0 +1,67 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contributor(s): Campbell Barton
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "BLI_utildefines.h"
+#include "BLI_math.h"
+
+#include "DNA_modifier_types.h"
+
+#include "MOD_meshcache_util.h"
+
+void MOD_meshcache_calc_range(const float frame, const char interp,
+                              const int frame_tot,
+                              int r_index_range[2], float *r_factor)
+{
+	if (interp == MOD_MESHCACHE_INTERP_NONE) {
+		r_index_range[0] = r_index_range[1] = max_ii(0, min_ii(frame_tot - 1, (int)(floorf(frame) + 0.5f)));
+		*r_factor = 1.0f; /* dummy */
+	}
+	else {
+		const float tframe = floorf(frame);
+		const float range  = frame - tframe;
+		r_index_range[0] = (int)tframe;
+		if (range <= FRAME_SNAP_EPS) {
+			/* we're close enough not to need blending */
+			r_index_range[1] = r_index_range[0];
+			*r_factor = 1.0f; /* dummy */
+		}
+		else {
+			/* blend between 2 frames */
+			r_index_range[1] = r_index_range[0] + 1;
+			*r_factor = range;
+		}
+
+		/* clamp */
+		if ((r_index_range[0] >= frame_tot) ||
+		    (r_index_range[1] >= frame_tot))
+		{
+			r_index_range[0] = r_index_range[1] = frame_tot - 1;
+			*r_factor = 1.0f; /* dummy */
+		}
+		else if ((r_index_range[0] < 0) ||
+		         (r_index_range[1] < 0))
+		{
+			r_index_range[0] = r_index_range[1] = 0;
+			*r_factor = 1.0f; /* dummy */
+		}
+	}
+}