From 921cfb8d147aea751bb494b4a88efe4cb75daa68 Mon Sep 17 00:00:00 2001
From: Alexander Pickering <alex@cogarr.net>
Date: Sun, 23 Sep 2018 16:07:21 -0400
Subject: Started moving generic physics into it's own file

Created bphysgeneric that holds all the shared code for bullet
rigidbodies. It needs to be included in any structs that have
a rigidbody field.
---
 src/client/lua_api/phys/bphysgeneric.cpp | 115 +++++++++++++++++++++++++++++++
 src/client/lua_api/phys/bphysgeneric.hpp |  24 +++++++
 2 files changed, 139 insertions(+)
 create mode 100644 src/client/lua_api/phys/bphysgeneric.cpp
 create mode 100644 src/client/lua_api/phys/bphysgeneric.hpp

(limited to 'src/client/lua_api/phys')

diff --git a/src/client/lua_api/phys/bphysgeneric.cpp b/src/client/lua_api/phys/bphysgeneric.cpp
new file mode 100644
index 0000000..0d882d6
--- /dev/null
+++ b/src/client/lua_api/phys/bphysgeneric.cpp
@@ -0,0 +1,115 @@
+
+extern "C" {
+  #include <lua.h>
+  #include <lauxlib.h>
+  #include <lualib.h>
+}
+#include <btBulletDynamicsCommon.h>
+//#include <irrlicht.h>
+#include <shared/lua_api/common.hpp>
+
+//extern IrrlichtDevice* device;
+
+//extern btDiscreteDynamicsWorld* World;
+//extern std::list<btRigidBody*> Objects;
+
+/*Physics things have the form of:
+{
+	rigidbody = btRigidBody,
+	node = ISceneNode,
+}
+*/
+
+//rigidbody:setgravity({x,y,z})
+int setgravity(lua_State *L){
+	double x,y,z;
+	popvector3d(L,&x,&y,&z);
+
+	lua_getfield(L,-1,"rigidbody");
+	btRigidBody *r = (btRigidBody*)lua_touserdata(L,-1);
+	lua_pop(L,2);
+
+	btVector3 v = btVector3(x,y,z);
+
+	r->setGravity(v);
+
+	return 0;
+}
+
+//apply force at a reletive offset
+//rigidbody:applyforce({x,y,z}[,{rx,ry,rz}])
+int applyforce(lua_State *L){
+	double rx,ry,rz;
+	rx = 0;
+	ry = 0;
+	rz = 0;
+	if(lua_gettop(L) > 2){
+		popvector3d(L,&rx,&ry,&rz);//{phys},{x,y,z}
+	}
+
+	double x,y,z;
+	popvector3d(L,&x,&y,&z);//{phys}
+
+	lua_getfield(L,-1,"rigidbody");
+	btRigidBody *r = (btRigidBody*)lua_touserdata(L,-1);
+	lua_pop(L,2);
+
+	btVector3 v = btVector3(x,y,z);
+	btVector3 o = btVector3(rx,ry,rz);
+
+	r->applyForce(v,o);
+	
+	return 0;
+}
+
+//rigidbody:getldamping()
+int getlineardamping(lua_State *L){
+	lua_getfield(L,-1,"rigidbody");
+	btRigidBody *r = (btRigidBody*)lua_touserdata(L,-1);
+	lua_pop(L,2);
+
+	double damp = r->getLinearDamping();
+	lua_pushnumber(L,damp);
+
+	return 1;
+}
+
+
+//rigidbody:getadamping()
+int getangulardamping(lua_State *L){
+	lua_getfield(L,-1,"rigidbody");
+	btRigidBody *r = (btRigidBody*)lua_touserdata(L,-1);
+	lua_pop(L,2);
+
+	double damp = r->getAngularDamping();
+	lua_pushnumber(L,damp);
+
+	return 1;
+}
+
+//rigidbody:activate()
+int activate(lua_State *L){
+	lua_getfield(L,-1,"rigidbody");
+	btRigidBody *r = (btRigidBody*)lua_touserdata(L,-1);
+	lua_pop(L,2);
+
+	r->activate();
+
+	return 0;
+}
+
+//rigidbody:setdamping(lineardamping, angulardamping)
+int setdamping(lua_State *L){
+	double adamp,ldamp;
+	adamp = lua_tonumber(L,-1);
+	ldamp = lua_tonumber(L,-2);
+	lua_pop(L,2);
+
+	lua_getfield(L,-1,"rigidbody");
+	btRigidBody *r = (btRigidBody*)lua_touserdata(L,-1);
+	lua_pop(L,2);
+
+	r->setDamping(adamp,ldamp);
+
+	return 0;
+}
diff --git a/src/client/lua_api/phys/bphysgeneric.hpp b/src/client/lua_api/phys/bphysgeneric.hpp
new file mode 100644
index 0000000..56bfaed
--- /dev/null
+++ b/src/client/lua_api/phys/bphysgeneric.hpp
@@ -0,0 +1,24 @@
+
+extern "C" {
+  #include <lua.h>
+  #include <lauxlib.h>
+  #include <lualib.h>
+}
+
+
+int setgravity(lua_State *L);
+int applyforce(lua_State *L);
+int getlineardamping(lua_State *L);
+int getangulardamping(lua_State *L);
+int setdamping(lua_State *L);
+int activate(lua_State *L);
+
+static const luaL_reg brigidbody_m[] = {
+	{"setgravity",       setgravity},
+	{"applyforce",       applyforce},
+	{"getldamping",      getlineardamping},
+	{"getadamping",      getangulardamping},
+	{"setdamping",       setdamping},
+	{"activate",         activate},
+	{NULL, NULL}
+};
-- 
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