150 lines
3.6 KiB
C++
150 lines
3.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/*
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* This code is based on the CRAB engine
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*
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* Copyright (c) Arvind Raja Yadav
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*
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* Licensed under MIT
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*
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*/
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#ifndef CRAB_VECTORS_H
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#define CRAB_VECTORS_H
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#include "common/debug.h"
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#include "crab/loaders.h"
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namespace Crab {
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//------------------------------------------------------------------------
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// Purpose: A simple 2D vector class
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//------------------------------------------------------------------------
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template<typename T>
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class Vector2D {
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public:
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T x, y;
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Vector2D(T X = 0, T Y = 0) { Set(X, Y); }
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void Set(T X = 0, T Y = 0) {
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x = X;
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y = Y;
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}
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bool load(rapidxml::xml_node<char> *node, const bool &echo = true) {
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return loadNum(x, "x", node, echo) && loadNum(y, "y", node, echo);
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}
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void saveState(rapidxml::xml_document<> &doc, rapidxml::xml_node<char> *root, const char *name) {
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warning("STUB: Vector2D::saveState()");
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#if 0
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rapidxml::xml_node<char> *child = doc.allocate_node(rapidxml::node_element, name);
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child->append_attribute(doc.allocate_attribute("x", g_engine->_stringPool->Get((int)x)));
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child->append_attribute(doc.allocate_attribute("y", g_engine->_stringPool->Get((int)y)));
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root->append_node(child);
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#endif
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}
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double magnitude() {
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return sqrt(x * x + y * y);
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}
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double magSqr() { // Added to avoid unnecessary sqrt calls (SZ)
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return (x * x + y * y);
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}
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void normalize() {
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double m = magnitude();
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x = x / m;
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y = y / m;
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}
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float dotProduct(const Vector2D<T> &v) const {
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return x * v.x + y * v.y;
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}
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// operators
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void operator+=(const Vector2D &v) {
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x += v.x;
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y += v.y;
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}
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void operator-=(const Vector2D &v) {
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x -= v.x;
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y -= v.y;
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}
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bool operator==(const Vector2D &v) const { return x == v.x && y == v.y; }
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bool operator!=(const Vector2D &v) const { return x != v.x || y != v.y; }
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friend Vector2D operator-(const Vector2D &v1, const Vector2D &v2) {
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return Vector2D(v1.x - v2.x, v1.y - v2.y);
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}
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};
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typedef Vector2D<int> Vector2i;
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typedef Vector2D<float> Vector2f;
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//------------------------------------------------------------------------
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// Purpose: A simple 3D vector class
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//------------------------------------------------------------------------
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template<typename T>
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class Vector3D {
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public:
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T x, y, z;
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Vector3D(T X = 0, T Y = 0, T Z = 0) {
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set(X, Y, Z);
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}
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Vector3D(rapidxml::xml_node<char> *node) {
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load(node);
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}
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void set(T X = 0, T Y = 0, T Z = 0) {
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x = X;
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y = Y;
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z = Z;
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}
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bool load(rapidxml::xml_node<char> *node) {
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return loadXYZ<T>(x, y, z, node);
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}
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// operators
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void operator+=(const Vector3D &v) {
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x += v.x;
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y += v.y;
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z += v.z;
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}
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void operator-=(const Vector3D &v) {
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x -= v.x;
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y -= v.y;
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z -= v.z;
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}
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bool operator==(const Vector3D &v) { return x == v.x && y == v.y && z == v.z; }
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};
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typedef Vector3D<int> Vector3i;
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typedef Vector3D<float> Vector3f;
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} // End of namespace Crab
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#endif // CRAB_VECTORS_H
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