From e7f754505b360f7a78448fab71db2b66b8a6cb5c Mon Sep 17 00:00:00 2001
From: Lee Salzman <lsalzman@gmail.com>
Date: Thu, 18 Sep 2008 03:13:49 +0000
Subject: [PATCH] avoid second rendering pass when possible

git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@2679 e016b1c5-ed68-44aa-a2f7-31cac88cffde
---
 source/src/protos.h        |  1 +
 source/src/rendermodel.cpp |  7 ++++++-
 source/src/shadow.cpp      | 16 ++++++++++------
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/source/src/protos.h b/source/src/protos.h
index f3f12b7f..93120a53 100644
--- a/source/src/protos.h
+++ b/source/src/protos.h
@@ -547,6 +547,7 @@ extern void updateaudio();
 extern void rendermodel(const char *mdl, int anim, int tex, float rad, const vec &o, float yaw, float pitch, float speed = 0, int basetime = 0, playerent *d = NULL, modelattach *a = NULL, float scale = 1.0f);
 extern void startmodelbatches();
 extern void endmodelbatches(bool flush = true);
+extern void clearmodelbatches();
 extern mapmodelinfo &getmminfo(int i);
 extern int findanim(const char *name);
 extern void loadskin(const char *dir, const char *altdir, Texture *&skin);
diff --git a/source/src/rendermodel.cpp b/source/src/rendermodel.cpp
index 8f53b52b..42e598e4 100644
--- a/source/src/rendermodel.cpp
+++ b/source/src/rendermodel.cpp
@@ -268,6 +268,11 @@ static int sorttranslucentmodels(const translucentmodel *x, const translucentmod
     return 0;
 }
 
+void clearmodelbatches()
+{
+    numbatches = -1;
+}
+
 void endmodelbatches(bool flush)
 {
     vector<translucentmodel> translucent;
@@ -318,7 +323,7 @@ void endmodelbatches(bool flush)
         }
         if(lastmodel) lastmodel->endrender();
     }
-    if(flush) numbatches = -1;
+    if(flush) clearmodelbatches();
 }
 
 void rendermodel(const char *mdl, int anim, int tex, float rad, const vec &o, float yaw, float pitch, float speed, int basetime, playerent *d, modelattach *a, float scale)
diff --git a/source/src/shadow.cpp b/source/src/shadow.cpp
index e2b57f70..6d4e3206 100644
--- a/source/src/shadow.cpp
+++ b/source/src/shadow.cpp
@@ -374,15 +374,19 @@ void drawstencilshadows()
         renderbounceents();
         endmodelbatches(false);
 
-        stenciling = 2;
+        if(shadowcasters)
+        {
+            stenciling = 2;
 
-        glStencilFunc(GL_ALWAYS, 0, ~0U);
-        glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
-        glCullFace(GL_BACK);
+            glStencilFunc(GL_ALWAYS, 0, ~0U);
+            glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
+            glCullFace(GL_BACK);
 
-        endmodelbatches(true);
+            endmodelbatches(true);
 
-        glCullFace(GL_FRONT);
+            glCullFace(GL_FRONT);
+        }
+        else clearmodelbatches();
     }
 
     stenciling = 0;