From 9b83919815f6a6ce5d73da1c28483970d0ca5589 Mon Sep 17 00:00:00 2001
From: unknown <paulx161@umn.edu>
Date: Wed, 3 Feb 2021 14:22:28 -0600
Subject: added dev/MinGfx/

---
 dev/MinGfx/src/point2.h | 112 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 dev/MinGfx/src/point2.h

(limited to 'dev/MinGfx/src/point2.h')

diff --git a/dev/MinGfx/src/point2.h b/dev/MinGfx/src/point2.h
new file mode 100644
index 0000000..954f313
--- /dev/null
+++ b/dev/MinGfx/src/point2.h
@@ -0,0 +1,112 @@
+/*
+ This file is part of the MinGfx Project.
+ 
+ Copyright (c) 2017,2018 Regents of the University of Minnesota.
+ All Rights Reserved.
+ 
+ Original Author(s) of this File:
+	Dan Keefe, 2018, University of Minnesota
+	
+ Author(s) of Significant Updates/Modifications to the File:
+	...
+ */
+
+#ifndef SRC_POINT2_H_
+#define SRC_POINT2_H_
+
+#include <iostream>
+
+namespace mingfx {
+
+/// Epsilon value used for == and != comparisons within MinGfx
+#define MINGFX_MATH_EPSILON 1e-8
+
+
+/** A 2D Point with floating point coordinates, used for storing 2D texture
+ coordinates, screen-space graphics, and mouse input.
+ */
+class Point2 {
+public:
+    /// Default point at the origin
+    Point2();
+    
+    /// Constructs a point given (x,y,1), where the 1 comes from the use of
+    /// homogeneous coordinates in computer graphics.
+    Point2(float x, float y);
+    
+    /// Constructs a point given a pointer to x,y data
+    Point2(float *p);
+    
+    /// Copy constructor for point
+    Point2(const Point2& p);
+    
+    /// Point destructor
+    virtual ~Point2();
+    
+    /// Check for "equality", taking floating point imprecision into account
+    bool operator==(const Point2& p) const;
+    
+    /// Check for "inequality", taking floating point imprecision into account
+    bool operator!=(const Point2& p) const;
+    
+    /// Assignment operator
+    Point2& operator=(const Point2& p);
+    
+    /// Read only access to the ith coordinate of the point.
+    float operator[](const int i) const;
+    
+    /// Returns a reference to the ith coordinate of the point.  Use this
+    /// accessor if you wish to set the coordinate rather than just request
+    /// its value.  Example:
+    /// ~~~
+    /// Point2 a;
+    /// a[0] = 5.0; // set the x-coordinate of the point
+    /// ~~~
+    float& operator[](const int i);
+    
+    /// Read only access to the x coordinate.  Can also use my_point[0].  Use
+    /// the my_point[0] = 1.0; form if you need to set the value.
+    float x() const { return p[0]; }
+    
+    /// Read only access to the y coordinate.  Can also use my_point[1].  Use
+    /// the my_point[1] = 1.0; form if you need to set the value.
+    float y() const { return p[1]; }
+    
+    /// In homogeneous coordinates, the w coordinate for all points is 1.0.
+    float w() const { return 1.0; }
+    
+    
+    /// Returns a const pointer to the raw data array
+    const float * value_ptr() const;
+    
+    /// Linear interpolation between this point and another. Alpha=0.0 returns
+    /// this point, and alpha=1.0 returns the other point, other values blend
+    /// between the two.
+    Point2 Lerp(const Point2 &b, float alpha) const;
+
+
+    /// (0,0) - a shortcut for a special point that is frequently needed
+    static const Point2& Origin();
+
+    /// (0,0) - a shortcut for a special point that is frequently needed
+    static const Point2& Zero();
+    
+    /// (1,1) - a shortcut for a special point that is frequently needed
+    static const Point2& One();
+
+    /// Linear interpolation between two points.  Alpha=0.0 returns 'a' and
+    /// alpha=1.0 returns 'b', other values blend between the two.
+    static Point2 Lerp(const Point2 &a, const Point2 &b, float alpha);
+    
+private:
+    float p[2];
+};
+
+
+std::ostream & operator<< ( std::ostream &os, const Point2 &p);
+std::istream & operator>> ( std::istream &is, Point2 &p);
+
+    
+} // namespace
+
+#endif
-- 
cgit v1.2.3