Split LOS code from view.cc.

los.cc: basic raycasting algorithm; losight(), see_grid() etc.
ray.cc: ray_def implementation.
mon-los.cc: monster_los

This includes adding a bunch of #includes; there's probably some
obsolete includes of view.h now.

1 files changed, 60 insertions, 0 deletions

diff --git a/crawl-ref/source/los.h b/crawl-ref/source/los.h
new file mode 100644
index 0000000000..301806b8c6
--- /dev/null
+++ b/crawl-ref/source/los.h
@@ -0,0 +1,60 @@
+/*
+ *  File:       los.h
+ *  Summary:    Line-of-sight algorithm.
+ */
+
+#ifndef LOS_H
+#define LOS_H
+
+#include "externs.h"
+
+#define EPSILON_VALUE 0.00001
+
+bool double_is_zero(const double x);
+
+
+void setLOSRadius(int newLR);
+int get_los_radius_squared(); // XXX
+
+struct ray_def;
+bool find_ray( const coord_def& source, const coord_def& target,
+               bool allow_fallback, ray_def& ray, int cycle_dir = 0,
+               bool find_shortest = false, bool ignore_solid = false );
+
+int num_feats_between(const coord_def& source, const coord_def& target,
+                      dungeon_feature_type min_feat,
+                      dungeon_feature_type max_feat,
+                      bool exclude_endpoints = true,
+                      bool just_check = false);
+bool grid_see_grid(const coord_def& p1, const coord_def& p2,
+                   dungeon_feature_type allowed = DNGN_UNSEEN);
+
+void clear_rays_on_exit();
+void losight(env_show_grid &sh, feature_grid &gr,
+             const coord_def& center, bool clear_walls_block = false,
+             bool ignore_clouds = false);
+void calc_show_los();
+
+bool see_grid( const env_show_grid &show,
+               const coord_def &c,
+               const coord_def &pos );
+bool see_grid(const coord_def &p);
+bool see_grid_no_trans( const coord_def &p );
+bool trans_wall_blocking( const coord_def &p );
+
+inline bool see_grid( int grx, int gry )
+{
+    return see_grid(coord_def(grx, gry));
+}
+
+inline bool see_grid_no_trans(int x, int y)
+{
+    return see_grid_no_trans(coord_def(x, y));
+}
+
+inline bool trans_wall_blocking(int x, int y)
+{
+    return trans_wall_blocking(coord_def(x, y));
+}
+
+#endif