From ce660a4b6ba367bd162dd2cff26d02c80a34c912 Mon Sep 17 00:00:00 2001
From: Normand Briere <nbriere@noware.ca>
Date: Sun, 06 Oct 2019 13:09:09 -0400
Subject: [PATCH] Fix camera up and skybox AO

---
 LA.java |   21 +++++++++++++--------
 1 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/LA.java b/LA.java
index a667209..154bebd 100644
--- a/LA.java
+++ b/LA.java
@@ -88,6 +88,9 @@
 
     static void vecCopy(cVector a, cVector b)
     {
+        Grafreed.Assert (a != null);
+        assert (b != null);
+        
         b.x = a.x;
         b.y = a.y;
         b.z = a.z;
@@ -160,6 +163,7 @@
 
     static cVector xformDir(cVector v, double mat[][])
     {
+                    new Exception().printStackTrace();
         System.exit(0);
         cVector temp = new cVector();
         xformDir(v, mat, temp);
@@ -306,14 +310,15 @@
 
         }
 
-        GrafreeD.Assert(Math.abs(src[0][3]) <= 1E-15);
-        GrafreeD.Assert(Math.abs(src[1][3]) <= 1E-15);
-        GrafreeD.Assert(Math.abs(src[2][3]) <= 1E-15);
-        GrafreeD.Assert(Math.abs(src[3][3] - 1) <= 1E-15);
-        GrafreeD.Assert(Math.abs(dst[0][3]) <= 1E-15);
-        GrafreeD.Assert(Math.abs(dst[1][3]) <= 1E-15);
-        GrafreeD.Assert(Math.abs(dst[2][3]) <= 1E-15);
-        GrafreeD.Assert(Math.abs(dst[3][3] - 1) <= 1E-15);
+        // Last row should always be 0 0 0 1
+        Grafreed.Assert(Math.abs(src[0][3]) <= 1E-15);
+        Grafreed.Assert(Math.abs(src[1][3]) <= 1E-15);
+        Grafreed.Assert(Math.abs(src[2][3]) <= 1E-15);
+        Grafreed.Assert(Math.abs(src[3][3] - 1) <= 1E-15);
+        Grafreed.Assert(Math.abs(dst[0][3]) <= 1E-15);
+        Grafreed.Assert(Math.abs(dst[1][3]) <= 1E-15);
+        Grafreed.Assert(Math.abs(dst[2][3]) <= 1E-15);
+        Grafreed.Assert(Math.abs(dst[3][3] - 1) <= 1E-15);
     }
 
     static double toRadians(double degrees)

--
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