From f38f646bfc1b9b3904359b92cbd16377cd618308 Mon Sep 17 00:00:00 2001
From: /dev/humancontroller <devhc@example.com>
Date: Thu, 13 Apr 2017 11:30:00 +0000
Subject: add a BG function to get the view origin of a client

for this, import BG_GetClientNormal()
---
 src/game/bg_misc.c   | 34 ++++++++++++++++++++++++++++++++++
 src/game/bg_public.h |  2 ++
 2 files changed, 36 insertions(+)

diff --git a/src/game/bg_misc.c b/src/game/bg_misc.c
index b7f23f3..3fdec70 100644
--- a/src/game/bg_misc.c
+++ b/src/game/bg_misc.c
@@ -5171,6 +5171,40 @@ qboolean BG_RotateAxis( vec3_t surfNormal, vec3_t inAxis[ 3 ],
   return qtrue;
 }
 
+/*
+===============
+BG_GetClientNormal
+
+Get the normal for the surface the client is walking on
+===============
+*/
+void BG_GetClientNormal( const playerState_t *ps, vec3_t normal )
+{
+  if( ps->stats[ STAT_STATE ] & SS_WALLCLIMBING )
+  {
+    if( ps->eFlags & EF_WALLCLIMBCEILING )
+      VectorSet( normal, 0.0f, 0.0f, -1.0f );
+    else
+      VectorCopy( ps->grapplePoint, normal );
+  }
+  else
+    VectorSet( normal, 0.0f, 0.0f, 1.0f );
+}
+
+/*
+===============
+BG_GetClientViewOrigin
+
+Get the position of the client's eye, based on the client's position, the surface's normal, and client's view height
+===============
+*/
+void BG_GetClientViewOrigin( const playerState_t *ps, vec3_t viewOrigin )
+{
+  vec3_t normal;
+  BG_GetClientNormal( ps, normal );
+  VectorMA( ps->origin, ps->viewheight, normal, viewOrigin );
+}
+
 /*
 ===============
 BG_PositionBuildableRelativeToPlayer
diff --git a/src/game/bg_public.h b/src/game/bg_public.h
index cbb2def..1a5b81c 100644
--- a/src/game/bg_public.h
+++ b/src/game/bg_public.h
@@ -1121,6 +1121,8 @@ void      BG_DeactivateUpgrade( int item, int stats[ ] );
 qboolean  BG_UpgradeIsActive( int item, int stats[ ] );
 qboolean  BG_RotateAxis( vec3_t surfNormal, vec3_t inAxis[ 3 ],
                          vec3_t outAxis[ 3 ], qboolean inverse, qboolean ceiling );
+void      BG_GetClientNormal( const playerState_t *ps, vec3_t normal );
+void      BG_GetClientViewOrigin( const playerState_t *ps, vec3_t viewOrigin );
 void      BG_PositionBuildableRelativeToPlayer( const playerState_t *ps,
                                                 const vec3_t mins, const vec3_t maxs,
                                                 void (*trace)( trace_t *, const vec3_t, const vec3_t,
-- 
cgit