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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 the CRAB engine
*
* Copyright (c) Arvind Raja Yadav
*
* Licensed under MIT
*
*/
#ifndef CRAB_VECTORS_H
#define CRAB_VECTORS_H
#include "common/debug.h"
#include "crab/loaders.h"
namespace Crab {
//------------------------------------------------------------------------
// Purpose: A simple 2D vector class
//------------------------------------------------------------------------
template<typename T>
class Vector2D {
public:
T x, y;
Vector2D(T X = 0, T Y = 0) { Set(X, Y); }
void Set(T X = 0, T Y = 0) {
x = X;
y = Y;
}
bool load(rapidxml::xml_node<char> *node, const bool &echo = true) {
return loadNum(x, "x", node, echo) && loadNum(y, "y", node, echo);
}
void saveState(rapidxml::xml_document<> &doc, rapidxml::xml_node<char> *root, const char *name) {
warning("STUB: Vector2D::saveState()");
#if 0
rapidxml::xml_node<char> *child = doc.allocate_node(rapidxml::node_element, name);
child->append_attribute(doc.allocate_attribute("x", g_engine->_stringPool->Get((int)x)));
child->append_attribute(doc.allocate_attribute("y", g_engine->_stringPool->Get((int)y)));
root->append_node(child);
#endif
}
double magnitude() {
return sqrt(x * x + y * y);
}
double magSqr() { // Added to avoid unnecessary sqrt calls (SZ)
return (x * x + y * y);
}
void normalize() {
double m = magnitude();
x = x / m;
y = y / m;
}
float dotProduct(const Vector2D<T> &v) const {
return x * v.x + y * v.y;
}
// operators
void operator+=(const Vector2D &v) {
x += v.x;
y += v.y;
}
void operator-=(const Vector2D &v) {
x -= v.x;
y -= v.y;
}
bool operator==(const Vector2D &v) const { return x == v.x && y == v.y; }
bool operator!=(const Vector2D &v) const { return x != v.x || y != v.y; }
friend Vector2D operator-(const Vector2D &v1, const Vector2D &v2) {
return Vector2D(v1.x - v2.x, v1.y - v2.y);
}
};
typedef Vector2D<int> Vector2i;
typedef Vector2D<float> Vector2f;
//------------------------------------------------------------------------
// Purpose: A simple 3D vector class
//------------------------------------------------------------------------
template<typename T>
class Vector3D {
public:
T x, y, z;
Vector3D(T X = 0, T Y = 0, T Z = 0) {
set(X, Y, Z);
}
Vector3D(rapidxml::xml_node<char> *node) {
load(node);
}
void set(T X = 0, T Y = 0, T Z = 0) {
x = X;
y = Y;
z = Z;
}
bool load(rapidxml::xml_node<char> *node) {
return loadXYZ<T>(x, y, z, node);
}
// operators
void operator+=(const Vector3D &v) {
x += v.x;
y += v.y;
z += v.z;
}
void operator-=(const Vector3D &v) {
x -= v.x;
y -= v.y;
z -= v.z;
}
bool operator==(const Vector3D &v) { return x == v.x && y == v.y && z == v.z; }
};
typedef Vector3D<int> Vector3i;
typedef Vector3D<float> Vector3f;
} // End of namespace Crab
#endif // CRAB_VECTORS_H
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