From 809966ab7b58e805a6828af1c5995e193e05ff9e Mon Sep 17 00:00:00 2001
From: Marco Hladik <marco@icculus.org>
Date: Fri, 18 Sep 2020 00:14:05 +0200
Subject: [PATCH] func_brush: Initial implementation. Source inspired entity.

---
 src/gs-entbase/server.src            |   1 +
 src/gs-entbase/server/func_brush.cpp | 124 +++++++++++++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 src/gs-entbase/server/func_brush.cpp

diff --git a/src/gs-entbase/server.src b/src/gs-entbase/server.src
index 08837bd1..29fb310d 100644
--- a/src/gs-entbase/server.src
+++ b/src/gs-entbase/server.src
@@ -35,6 +35,7 @@ server/func_recharge.cpp
 server/func_healthcharger.cpp
 server/func_breakable.cpp
 server/func_button.cpp
+server/func_brush.cpp
 server/func_door.cpp
 server/func_door_rotating.cpp
 server/func_illusionary.cpp
diff --git a/src/gs-entbase/server/func_brush.cpp b/src/gs-entbase/server/func_brush.cpp
new file mode 100644
index 00000000..74aab61b
--- /dev/null
+++ b/src/gs-entbase/server/func_brush.cpp
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2016-2020 Marco Hladik <marco@icculus.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*QUAKED func_brush (0 .5 .8) ?
+"targetname"        Name
+
+"Solidity"          Mode for choosing solidity:
+                    0 - Toggle
+                    1 - Not solid
+                    2 - Solid
+"StartDisabled"     Only valid when Solidity is 0. Will make it spawn invisible
+                    and without collision.
+"solidbsp"          Type of collision model to choose
+"excludednpc"       Name of the NPC classname that will not collide with this
+                    entity
+"invert_exclusion"  Set to 1 if you want the 'excludednpc' key to act inverted
+
+Description:
+Combination of func_illusionary, func_wall, func_wall_toggle.
+Triggering it causes to become invisible if the key 'Solidity' is set to 0 as
+well as lose its collision.
+
+
+Trivia:
+This entity was introduced in Half-Life 2 (2004).
+*/
+
+class func_brush:CBaseTrigger
+{
+	int m_iSolidity;
+	int m_iStartOff;
+
+	void(void) func_brush;
+
+	virtual void(entity,int) Trigger;
+	virtual void(string,string) SpawnKey;
+	virtual void(void) Respawn;
+};
+
+void
+func_brush::Trigger(entity act, int state)
+{
+	switch (state) {
+	case TRIG_OFF:
+		SetSolid(SOLID_NOT);
+		break;
+	case TRIG_ON:
+		SetSolid(SOLID_BSP);
+		break;
+	default:
+		SetSolid(solid == SOLID_BSP ? SOLID_NOT : SOLID_BSP);
+	}
+
+	/* toggle appareance */
+	if (Solidity == 0) {
+		if (solid == SOLID_NOT)
+			SetModelIndex(0);
+		else
+			SetModel(m_oldModel);
+	}
+}
+
+void
+func_brush::SpawnKey(string strKey, string strValue)
+{
+	switch (strKey) {
+	case "Solidity":
+		m_iSolidity = stoi(strValue);
+		break;
+	case "StartDisabled":
+		m_iStartOff = stoi(strValue);
+		break;
+	/* TODO: implement these */
+	case "solidbsp":
+		break;
+	case "excludednpc":
+		break;
+	case "invert_exclusion":
+		break;
+	}
+}
+
+void
+func_brush::Respawn(void)
+{
+	SetMovetype(MOVETYPE_PUSH);
+	SetModel(m_oldModel);
+	SetOrigin(m_oldOrigin);
+
+	switch (m_iSolidity) {
+	case 1:
+		SetSolid(SOLID_NOT);
+		break;
+	case 2:
+		SetSolid(SOLID_BSP);
+		break;
+	default:
+		if (m_iStartOff) {
+			SetSolid(SOLID_NOT);
+			SetModelIndex(0);
+		} else {
+			SetSolid(SOLID_BSP);
+		}
+	}
+}
+
+void
+func_brush::func_brush(void)
+{
+	CBaseTrigger::CBaseTrigger();
+}