From c5237ce58f5c69613af9d6091d33094ab3bde18f Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sun, 27 Oct 2019 16:29:00 +0200
Subject: [PATCH] - level post-processor can now add new things

---
 src/maploader/maploader.cpp                  | 36 ++++++++++++++++++++
 wadsrc/static/zscript/level_postprocessor.zs |  4 +++
 2 files changed, 40 insertions(+)

diff --git a/src/maploader/maploader.cpp b/src/maploader/maploader.cpp
index efc873475..65d7201b7 100644
--- a/src/maploader/maploader.cpp
+++ b/src/maploader/maploader.cpp
@@ -3381,6 +3381,42 @@ DEFINE_ACTION_FUNCTION(DLevelPostProcessor, GetThingCount)
 	ACTION_RETURN_INT(self->loader->MapThingsConverted.Size());
 }
 
+DEFINE_ACTION_FUNCTION(DLevelPostProcessor, AddThing)
+{
+	PARAM_SELF_PROLOGUE(DLevelPostProcessor);
+	PARAM_UINT(ednum);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
+	PARAM_FLOAT(z);
+	PARAM_INT(angle);
+	PARAM_UINT(skills);
+	PARAM_UINT(flags);
+
+	auto &things = self->loader->MapThingsConverted;
+	const unsigned newindex = things.Size();
+	things.Resize(newindex + 1);
+
+	auto &newthing = things.Last();
+	memset(&newthing, 0, sizeof newthing);
+
+	newthing.Gravity = 1;
+	newthing.SkillFilter = skills;
+	newthing.ClassFilter = 0xFFFF;
+	newthing.RenderStyle = STYLE_Count;
+	newthing.Alpha = -1;
+	newthing.Health = 1;
+	newthing.FloatbobPhase = -1;
+	newthing.pos.X = x;
+	newthing.pos.Y = y;
+	newthing.pos.Z = z;
+	newthing.angle = angle;
+	newthing.EdNum = ednum;
+	newthing.info = DoomEdMap.CheckKey(ednum);
+	newthing.flags = flags;
+
+	ACTION_RETURN_INT(newindex);
+}
+
 DEFINE_ACTION_FUNCTION(DLevelPostProcessor, GetThingEdNum)
 {
 	PARAM_SELF_PROLOGUE(DLevelPostProcessor);
diff --git a/wadsrc/static/zscript/level_postprocessor.zs b/wadsrc/static/zscript/level_postprocessor.zs
index 3c38da6b0..cbea8504d 100644
--- a/wadsrc/static/zscript/level_postprocessor.zs
+++ b/wadsrc/static/zscript/level_postprocessor.zs
@@ -13,7 +13,11 @@ class LevelPostProcessor native play
 	protected native void AddLineID(int line, int tag);
 	protected native void OffsetSectorPlane(int sector, int plane, double offset);
 
+	const SKILLS_ALL = 31;
+	const MODES_ALL = MTF_SINGLE | MTF_COOPERATIVE | MTF_DEATHMATCH;
+
 	protected native uint GetThingCount();
+	protected native uint AddThing(int ednum, Vector3 pos, int angle = 0, uint skills = SKILLS_ALL, uint flags = MODES_ALL);
 
 	protected native int GetThingEdNum(uint thing);
 	protected native void SetThingEdNum(uint thing, int ednum);