From 876c64b1e530b4b9826eef8fcfc5c3bc567c6be8 Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Fri, 29 Mar 2019 12:27:50 +0100
Subject: [PATCH] WARNING: This could break something

If we have no data to update/draw, we avoid update/draw. On `DrawBuffersDefault()` if no vertes data is available nothing is drawn but some globals: vertexData, projection, modelview, draws... are reseted.

There shouldn't be any problem if we don't touch those globals in case no vertex have been processed but, just in case, I warn about it.
---
 src/rlgl.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/rlgl.h b/src/rlgl.h
index d4faec188..49ab1de54 100644
--- a/src/rlgl.h
+++ b/src/rlgl.h
@@ -1786,8 +1786,12 @@ void rlglClose(void)
 void rlglDraw(void)
 {
 #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
-    UpdateBuffersDefault();
-    DrawBuffersDefault();       // NOTE: Stereo rendering is checked inside
+    // Only process data if we have data to process
+    if (vertexData[currentBuffer].vCounter > 0)
+    {
+        UpdateBuffersDefault();
+        DrawBuffersDefault();       // NOTE: Stereo rendering is checked inside
+    }
 #endif
 }