From 63aa00f4ca28b3c4528721f79f1c08c7f1f97195 Mon Sep 17 00:00:00 2001
From: Tim Angus <tim@ngus.net>
Date: Wed, 22 Aug 2001 01:39:29 +0000
Subject: Lens flares :)

---
 src/cgame/cg_ents.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'src/cgame')

diff --git a/src/cgame/cg_ents.c b/src/cgame/cg_ents.c
index dc65015b..0c0d6e9e 100644
--- a/src/cgame/cg_ents.c
+++ b/src/cgame/cg_ents.c
@@ -775,6 +775,52 @@ static void CG_TorchLight( centity_t *cent )
 #endif
 }
 
+/*
+=========================
+CG_LensFlare
+=========================
+*/
+static void CG_LensFlare( centity_t *cent )
+{
+  refEntity_t   flare;
+  entityState_t *es;
+  vec3_t        forward, delta;
+  float         len;
+  trace_t       tr;
+
+  es = &cent->currentState;
+  
+  memset( &flare, 0, sizeof( flare ) );
+  
+  //bunch of geometry
+  AngleVectors( cent->lerpAngles, forward, NULL, NULL );
+  VectorCopy( cent->lerpOrigin, flare.origin );
+  VectorSubtract( flare.origin, cg.refdef.vieworg, delta );
+  len = VectorLength( delta );
+  VectorNormalize( delta );
+
+  flare.reType = RT_SPRITE;
+  flare.customShader = cgs.gameShaders[ es->modelindex ];
+  flare.shaderRGBA[ 0 ] = 0xFF;
+  flare.shaderRGBA[ 1 ] = 0xFF;
+  flare.shaderRGBA[ 2 ] = 0xFF;
+  flare.shaderRGBA[ 3 ] = 0xFF;
+
+  //can only see the flare when in front of it
+  flare.radius = len / es->origin2[ 0 ];
+  flare.radius *= DotProduct( delta, forward );
+
+  //if can't see the centre do not draw
+  CG_Trace( &tr, flare.origin, NULL, NULL, cg.refdef.vieworg, 0, MASK_SHOT );
+  if( tr.fraction < 1.0f )
+    return;
+
+  if( flare.radius < 0 )
+    flare.radius = 0;
+
+  trap_R_AddRefEntityToScene( &flare );
+}
+
 /*
 =========================
 CG_AdjustPositionForMover
@@ -959,6 +1005,9 @@ static void CG_AddCEntity( centity_t *cent ) {
   case ET_ANIMMAPOBJ:
     CG_animMapObj( cent );
     break;
+  case ET_LENSFLARE:
+    CG_LensFlare( cent );
+    break;
   }
 }
 
-- 
cgit