Added a workaround the incomplete draw buffer in basicShadowRenderer

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9978 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/shadow/BasicShadowRenderer.java

@@ -68,6 +68,7 @@ public class BasicShadowRenderer implements SceneProcessor {
     private boolean noOccluders = false;
     private Vector3f[] points = new Vector3f[8];
     private Vector3f direction = new Vector3f();
+    protected Texture2D dummyTex;
 
     /**
      * Creates a BasicShadowRenderer
@@ -80,6 +81,10 @@ public class BasicShadowRenderer implements SceneProcessor {
         shadowFB.setDepthTexture(shadowMap);
         shadowCam = new Camera(size, size);
         
+         //DO NOT COMMENT THIS (it prevent the OSX incomplete read buffer crash)
+        dummyTex = new Texture2D(size, size, Format.RGBA8);        
+        shadowFB.setColorTexture(dummyTex);
+
         preshadowMat = new Material(manager, "Common/MatDefs/Shadow/PreShadow.j3md");
         postshadowMat = new Material(manager, "Common/MatDefs/Shadow/BasicPostShadow.j3md");
         postshadowMat.setTexture("ShadowMap", shadowMap);