From 3e4f2de79a554cc486cea64e39b5ebe58e2c90c6 Mon Sep 17 00:00:00 2001
From: terminx <terminx@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Tue, 17 Sep 2019 03:20:38 +0000
Subject: [PATCH] Add yax_getzsofslope(), based on getzsofslope_player()

git-svn-id: https://svn.eduke32.com/eduke32@8109 1a8010ca-5511-0410-912e-c29ae57300e0
---
 source/build/include/build.h |  1 +
 source/build/src/engine.cpp  | 39 ++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/source/build/include/build.h b/source/build/include/build.h
index a9c45ecb5..e49462880 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -1226,6 +1226,7 @@ int32_t   getceilzofslopeptr(usectorptr_t sec, int32_t dax, int32_t day) ATTRIBU
 int32_t   getflorzofslopeptr(usectorptr_t sec, int32_t dax, int32_t day) ATTRIBUTE((nonnull(1)));
 void   getzsofslopeptr(usectorptr_t sec, int32_t dax, int32_t day,
                        int32_t *ceilz, int32_t *florz) ATTRIBUTE((nonnull(1,4,5)));
+void yax_getzsofslope(int sectNum, int playerX, int playerY, int32_t* pCeilZ, int32_t* pFloorZ);
 
 static FORCE_INLINE int32_t getceilzofslope(int16_t sectnum, int32_t dax, int32_t day)
 {
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index 14db5f252..2e1b36cda 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -12300,6 +12300,45 @@ void getzsofslopeptr(usectorptr_t sec, int32_t dax, int32_t day, int32_t *ceilz,
         *florz += scale(sec->floorheinum,j>>1,i)<<1;
 }
 
+#ifdef YAX_ENABLE
+void yax_getzsofslope(int sectNum, int playerX, int playerY, int32_t *pCeilZ, int32_t *pFloorZ)
+{
+    int didCeiling = 0;
+    int didFloor   = 0;
+    int testSector = 0;
+
+    if ((sector[sectNum].ceilingstat & 512) == 0)
+    {
+        testSector = yax_getneighborsect(playerX, playerY, sectNum, YAX_CEILING);
+
+        if (testSector >= 0)
+        {
+ceiling:
+            *pCeilZ    = getcorrectceilzofslope(testSector, playerX, playerY);
+            didCeiling = 1;
+        }
+    }
+
+    if ((sector[sectNum].floorstat & 512) == 0)
+    {
+        testSector = yax_getneighborsect(playerX, playerY, sectNum, YAX_FLOOR);
+
+        if (testSector >= 0)
+        {
+floor:
+            *pFloorZ = getcorrectflorzofslope(testSector, playerX, playerY);
+            didFloor = 1;
+        }
+    }
+
+    testSector = sectNum;
+
+    if (!didCeiling)
+        goto ceiling;
+    else if (!didFloor)
+        goto floor;
+}
+#endif
 
 //
 // alignceilslope