star-2d

commit 2e74745c9d1e0c558f0d138d61c7e6fae2a58eb5
parent e24675d4017ca2f1cd5ac5d17018b1265cfca0b5
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Mon, 20 Jun 2016 08:43:19 +0200

Implement the line_segments_compute_aabb backend function

Diffstat:
M
src/s2d_line_segments.c
 | 
24
++++++++++++++++++++++++

1 file changed, 24 insertions(+), 0 deletions(-)
diff --git a/src/s2d_line_segments.c b/src/s2d_line_segments.c
@@ -479,3 +479,27 @@ error:
   goto exit;
 }
 
+void
+line_segments_compute_aabb
+  (struct line_segments* line,
+   float lower[2],
+   float upper[2])
+{
+  float* pos;
+  size_t ivert, nverts;
+  ASSERT(line && lower && upper);
+
+  f2_splat(lower, FLT_MAX);
+  f2_splat(upper,-FLT_MAX);
+
+  nverts = line_segments_get_nverts(line);
+  if(!nverts) return;
+
+  pos = line_segments_get_pos(line);
+  FOR_EACH(ivert, 0, nverts) {
+    const size_t ipos = ivert * 2/*#coords per vertex*/;
+    f2_min(lower, lower, pos + ipos);
+    f2_max(upper, upper, pos + ipos);
+  }
+}
+