Initial commit

engines/sword25/math/vertex.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This code is based on Broken Sword 2.5 engine
+ *
+ * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
+ *
+ * Licensed under GNU GPL v2
+ *
+ */
+
+#include "sword25/math/vertex.h"
+
+#include "common/lua/lua.h"
+#include "common/lua/lauxlib.h"
+
+namespace Sword25 {
+
+Vertex &Vertex::luaVertexToVertex(lua_State *L, int stackIndex, Vertex &vertex) {
+#ifdef DEBUG
+	int __startStackDepth = lua_gettop(L);
+#endif
+
+	// Ensure that we actually consider a table
+	luaL_checktype(L, stackIndex, LUA_TTABLE);
+
+	// Read X Component
+	lua_pushstring(L, "X");
+	lua_gettable(L, stackIndex);
+	if (!lua_isnumber(L, -1)) luaL_argcheck(L, 0, stackIndex, "the X component has to be a number");
+	vertex.x = static_cast<int>(lua_tonumber(L, -1));
+	lua_pop(L, 1);
+
+	// Read Y Component
+	lua_pushstring(L, "Y");
+	lua_gettable(L, stackIndex);
+	if (!lua_isnumber(L, -1)) luaL_argcheck(L, 0, stackIndex, "the Y component has to be a number");
+	vertex.y = static_cast<int>(lua_tonumber(L, -1));
+	lua_pop(L, 1);
+
+#ifdef DEBUG
+	assert(__startStackDepth == lua_gettop(L));
+#endif
+
+	return vertex;
+}
+
+void Vertex::vertexToLuaVertex(lua_State *L, const Vertex &vertex) {
+	// Create New Table
+	lua_newtable(L);
+
+	// X value is written to table
+	lua_pushstring(L, "X");
+	lua_pushnumber(L, vertex.x);
+	lua_settable(L, -3);
+
+	// Y value is written to table
+	lua_pushstring(L, "Y");
+	lua_pushnumber(L, vertex.y);
+	lua_settable(L, -3);
+}
+
+} // End of namespace Sword25