added dev/MinGfx/

1 files changed, 104 insertions, 0 deletions

diff --git a/dev/MinGfx/src/point2.cc b/dev/MinGfx/src/point2.cc
new file mode 100644
index 0000000..9d98777
--- /dev/null
+++ b/dev/MinGfx/src/point2.cc
@@ -0,0 +1,104 @@
+/*
+ Copyright (c) 2017,2018 Regents of the University of Minnesota.
+ All Rights Reserved.
+ See corresponding header file for details.
+ */
+
+#include "point2.h"
+
+#include <math.h>
+
+namespace mingfx {
+
+static const Point2 s_zerop2d = Point2(0,0);
+static const Point2 s_onep2d = Point2(1,1);
+
+const Point2& Point2::Origin() { return s_zerop2d; }
+const Point2& Point2::Zero() { return s_zerop2d; }
+const Point2& Point2::One() { return s_onep2d; }
+    
+    
+Point2::Point2() {
+    p[0] = 0.0;
+    p[1] = 0.0;
+}
+
+Point2::Point2(float x, float y) {
+    p[0] = x;
+    p[1] = y;
+}
+
+Point2::Point2(float *ptr) {
+    p[0] = ptr[0];
+    p[1] = ptr[1];
+}
+
+Point2::Point2(const Point2& other) {
+    p[0] = other[0];
+    p[1] = other[1];
+}
+
+Point2::~Point2() {
+}
+
+bool Point2::operator==(const Point2& other) const {
+    return (fabs(other[0] - p[0]) < MINGFX_MATH_EPSILON &&
+            fabs(other[1] - p[1]) < MINGFX_MATH_EPSILON);
+}
+
+bool Point2::operator!=(const Point2& other) const {
+    return (fabs(other[0] - p[0]) >= MINGFX_MATH_EPSILON ||
+            fabs(other[1] - p[1]) >= MINGFX_MATH_EPSILON);
+}
+
+Point2& Point2::operator=(const Point2& other) {
+    p[0] = other[0];
+    p[1] = other[1];
+    return *this;
+}
+
+float Point2::operator[](const int i) const {
+    if ((i>=0) && (i<=1)) {
+        return p[i];
+    }
+    else {
+        // w component of a point is 1 so return the constant 1.0
+        return 1.0;
+    }
+}
+
+float& Point2::operator[](const int i) {
+    return p[i];
+}
+
+
+Point2 Point2::Lerp(const Point2 &b, float alpha) const {
+    float x = (1.0f-alpha)*(*this)[0] + alpha*b[0];
+    float y = (1.0f-alpha)*(*this)[1] + alpha*b[1];
+    return Point2(x,y);
+}
+
+Point2 Point2::Lerp(const Point2 &a, const Point2 &b, float alpha) {
+    float x = (1.0f-alpha)*a[0] + alpha*b[0];
+    float y = (1.0f-alpha)*a[1] + alpha*b[1];
+    return Point2(x,y);
+}
+
+    
+const float * Point2::value_ptr() const {
+    return p;
+}
+
+
+std::ostream & operator<< ( std::ostream &os, const Point2 &p) {
+    return os << "(" << p[0] << ", " << p[1] << ")";
+}
+
+std::istream & operator>> ( std::istream &is, Point2 &p) {
+    // format:  (x, y)
+    char dummy;
+    return is >> dummy >> p[0] >> dummy >> p[1] >> dummy;
+}
+
+    
+} // end namespace