star-cpr

commit 7e38ca7227aa5f65400773b9c59df11f62924421
parent 339d4f77b30d883e15469dee20bd3de935715a77
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Thu,  9 Feb 2023 18:38:28 +0100

Add a in bbox test for polygons

Diffstat:
M
src/scpr.h
 | 
7
+++++++
M
src/scpr_polygon.c
 | 
32
++++++++++++++++++++++++++++++++

2 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/src/scpr.h b/src/scpr.h
@@ -173,6 +173,13 @@ scpr_polygon_setup_indexed_vertices
    void* data); /* Client data set as the last param of the callbacks */
 
 SCPR_API res_T
+scpr_polygon_in_bbox
+  (struct scpr_polygon* polygon,
+   const double lower[2],
+   const double upper[2],
+   int* inside);
+
+SCPR_API res_T
 scpr_offset_polygon
   (struct scpr_polygon* polygon,
    const double offset, /* Can be either positive or negative */
diff --git a/src/scpr_polygon.c b/src/scpr_polygon.c
@@ -258,6 +258,38 @@ error:
 }
 
 res_T
+scpr_polygon_in_bbox
+  (struct scpr_polygon* polygon,
+   const double lower[2],
+   const double upper[2],
+   int* inside)
+{
+  int i, in = 1;
+  int64_t low[2], up[2];
+  res_T res = RES_OK;
+
+  if(!polygon || !lower || !upper || !inside) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  SCPR(device_scale(polygon->device, lower, 2, low));
+  SCPR(device_scale(polygon->device, upper, 2, up));
+  for(i = 0; i < 2; i++) {
+    if(polygon->lower[i] < low[i] || polygon->upper[i] > up[i]) {
+      in = 0;
+      break;
+    }
+  }
+
+  *inside = in;
+exit:
+  return res;
+error:
+  goto exit;
+}
+
+res_T
 scpr_polygon_create_copy
   (struct scpr_device* dev,
    const struct scpr_polygon* src_polygon,