From 6b91dc2d7d0861ab5e5e5dc0a2c7d3ab18b44da4 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Wed, 3 Apr 2019 20:32:30 +0200
Subject: [PATCH] 3d:: fixed invis_point and behindsphere

---
 hypgraph.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hypgraph.cpp b/hypgraph.cpp
index 365c8523..3ef3970e 100644
--- a/hypgraph.cpp
+++ b/hypgraph.cpp
@@ -709,11 +709,11 @@ bool behindsphere(const hyperpoint& h) {
   if(mdBandAny()) return false;
 
   if(vid.alpha > 1) {
-     if(h[2] > -1/vid.alpha) return true;
+     if(h[DIM] > -1/vid.alpha) return true;
      }  
   
   if(vid.alpha <= 1) {
-    if(h[2] < .2-vid.alpha) return true;
+    if(h[DIM] < .2-vid.alpha) return true;
     }
   
   return false;
@@ -786,7 +786,7 @@ transmatrix applyspin(const heptspin& hs, const transmatrix& V) {
   }
 
 bool invis_point(const hyperpoint h) {
-  if(DIM == 2 || sphere) return false;
+  if(DIM == 2 || sphere || pmodel != mdPerspective) return false;
   return h[2] < 0;
   }