Added a 2D vector class from my old Allegro Wrapper, Halley.

Originally committed to SVN as r1369.

aegisub/Makefile.am

@@ -205,6 +205,7 @@ aegisub_SOURCES = \
 	utils.cpp \
 	validators.cpp \
 	variable_data.cpp \
+	vector2d.cpp \
 	version.cpp \
 	vfr.cpp \
 	video_box.cpp \

aegisub/vector2d.cpp

@@ -0,0 +1,183 @@
+// Copyright (c) 2007, Rodrigo Braz Monteiro
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//   * Redistributions of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//   * Neither the name of the Aegisub Group nor the names of its contributors
+//     may be used to endorse or promote products derived from this software
+//     without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// -----------------------------------------------------------------------------
+//
+// AEGISUB
+//
+// Website: http://aegisub.cellosoft.com
+// Contact: mailto:zeratul@cellosoft.com
+//
+
+
+///////////
+// Headers
+#include "vector2d.h"
+
+
+////////////////////
+// Null constructor
+Vector2D::Vector2D () {
+	x = y = 0;
+}
+
+
+////////////////////////
+// Standard constructor
+Vector2D::Vector2D (float _x,float _y) {
+	x = _x;
+	y = _y;
+}
+
+
+////////////////////////////////////
+// Construction from another vector
+Vector2D::Vector2D (const Vector2D &vec) {
+	x = vec.x;
+	y = vec.y;
+}
+
+
+//////////////
+// Assignment
+void Vector2D::operator = (const Vector2D param) {
+	x = param.x;
+	y = param.y;
+}
+
+
+//////////////
+// Comparison
+bool Vector2D::operator == (const Vector2D param) const {
+	return ((x == param.x) && (y == param.y));
+}
+
+bool Vector2D::operator != (const Vector2D param) const {
+	return ((x != param.x) || (y == param.y));
+}
+
+
+///////////
+// Adition
+Vector2D Vector2D::operator + (const Vector2D param) const {
+	return Vector2D(x + param.x,y + param.y);
+}
+
+Vector2D Vector2D::operator += (const Vector2D param) {
+	x += param.x;
+	y += param.y;
+	return *this;
+}
+
+
+///////////////
+// Subtraction
+Vector2D Vector2D::operator - (const Vector2D param) const {
+	return Vector2D(x - param.x,y - param.y);
+}
+
+Vector2D Vector2D::operator -= (const Vector2D param) {
+	x -= param.x;
+	y -= param.y;
+	return *this;
+}
+
+
+//////////
+// Negate
+Vector2D Vector2D::operator - () {
+	return Vector2D(-x,-y);
+}
+
+
+////////////////////////////
+// Multiplication by scalar
+Vector2D Vector2D::operator * (float param) {
+	return Vector2D(x * param,y * param);
+}
+
+Vector2D Vector2D::operator *= (float param) {
+	x *= param;
+	y *= param;
+	return *this;
+}
+
+Vector2D operator * (float f,const Vector2D &v) {
+	return Vector2D(v.x * f,v.y * f);
+}
+
+
+//////////////////////
+// Division by scalar
+Vector2D Vector2D::operator / (float param) {
+	return Vector2D(x / param,y / param);
+}
+
+Vector2D Vector2D::operator /= (float param) {
+	x /= param;
+	y /= param;
+	return *this;
+}
+
+Vector2D operator / (float f,const Vector2D &v) {
+	return Vector2D(v.x / f,v.y / f);
+}
+
+
+/////////////////
+// Cross product
+float Vector2D::Cross (const Vector2D param) const {
+	return x * param.y - y * param.x;
+}
+
+
+///////////////
+// Dot product
+float Vector2D::Dot (const Vector2D param) const {
+	return (x * param.x) + (y * param.y);
+}
+
+
+//////////
+// Length
+float Vector2D::Len () const {
+	return sqrt(x*x + y*y);
+}
+
+
+///////////
+// Unitary
+Vector2D Vector2D::Unit () {
+	float l = Len();
+	if (l != 0) {
+		Vector2D temp;
+		temp.x = x;
+		temp.y = y;
+		return temp / l;
+	}
+	else return Vector2D(0,0);
+}

aegisub/vector2d.h

@@ -0,0 +1,76 @@
+// Copyright (c) 2007, Rodrigo Braz Monteiro
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//   * Redistributions of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//   * Neither the name of the Aegisub Group nor the names of its contributors
+//     may be used to endorse or promote products derived from this software
+//     without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// -----------------------------------------------------------------------------
+//
+// AEGISUB
+//
+// Website: http://aegisub.cellosoft.com
+// Contact: mailto:zeratul@cellosoft.com
+//
+
+
+#pragma once
+
+
+//////////////////////////////
+// Vector2D class declaration
+class Vector2D {
+public:
+	float x,y;
+
+	Vector2D ();
+	Vector2D (float _x,float _y);
+	Vector2D (const Vector2D &vec);
+
+	void operator = (const Vector2D param);
+	bool operator == (const Vector2D param) const;
+	bool operator != (const Vector2D param) const;
+
+	Vector2D operator - ();
+	Vector2D operator + (const Vector2D param) const;
+	Vector2D operator - (const Vector2D param) const;
+	Vector2D operator * (float param);
+	Vector2D operator / (float param);
+
+	Vector2D operator += (const Vector2D param);
+	Vector2D operator -= (const Vector2D param);
+	Vector2D operator *= (float param);
+	Vector2D operator /= (float param);
+
+	Vector2D Unit ();
+	float Cross (const Vector2D param) const;
+	virtual float Dot (const Vector2D param) const;
+
+	virtual float Len () const;
+};
+
+
+////////////////////
+// Global operators
+Vector2D operator * (float f,const Vector2D &v);
+Vector2D operator / (float f,const Vector2D &v);