From 3bd383baf6a17e734329e1fc677c7e86283db772 Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Mon, 26 Oct 2015 22:52:36 +0800
Subject: Added support for relative line numbers. Added instructions for, brk
 and cont. (They are still untested...) Parser code cleanup. Removed garbage
 output to stderr. Reorganize the repository structure. Updated BLR2 code move
 it into archive. Added BLR1 files.

---
 archive/hge/CxImage/ximath.cpp | 97 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 archive/hge/CxImage/ximath.cpp

(limited to 'archive/hge/CxImage/ximath.cpp')

diff --git a/archive/hge/CxImage/ximath.cpp b/archive/hge/CxImage/ximath.cpp
new file mode 100644
index 0000000..0175184
--- /dev/null
+++ b/archive/hge/CxImage/ximath.cpp
@@ -0,0 +1,97 @@
+#include "ximage.h"
+#include "ximath.h"
+#include <math.h>
+
+//this module should contain some classes for geometrical transformations
+//usable with selections, etc... once it's done, that is. :)
+
+CxPoint2::CxPoint2()
+{
+  x=y=0.0f;
+}
+
+CxPoint2::CxPoint2(float const x_, float const y_)
+{
+  x=x_;
+  y=y_;
+}
+
+CxPoint2::CxPoint2(CxPoint2 const &p)
+{
+  x=p.x;
+  y=p.y;
+}
+
+float CxPoint2::Distance(CxPoint2 const p2)
+{
+  return (float)sqrt((x-p2.x)*(x-p2.x)+(y-p2.y)*(y-p2.y));
+}
+
+float CxPoint2::Distance(float const x_, float const y_)
+{
+  return (float)sqrt((x-x_)*(x-x_)+(y-y_)*(y-y_));
+}
+
+CxRect2::CxRect2()
+{
+}
+
+CxRect2::CxRect2(float const x1_, float const y1_, float const x2_, float const y2_)
+{
+  botLeft.x=x1_;
+  botLeft.y=y1_;
+  topRight.x=x2_;
+  topRight.y=y2_;
+}
+
+CxRect2::CxRect2(CxRect2 const &p)
+{
+  botLeft=p.botLeft;
+  topRight=p.topRight;
+}
+
+float CxRect2::Surface() const
+/*
+ * Returns the surface of rectangle.
+ */
+{
+  return (topRight.x-botLeft.x)*(topRight.y-botLeft.y);
+}
+
+CxRect2 CxRect2::CrossSection(CxRect2 const &r2) const
+/*
+ * Returns crossection with another rectangle.
+ */
+{
+  CxRect2 cs;
+  cs.botLeft.x=max(botLeft.x, r2.botLeft.x);
+  cs.botLeft.y=max(botLeft.y, r2.botLeft.y);
+  cs.topRight.x=min(topRight.x, r2.topRight.x);
+  cs.topRight.y=min(topRight.y, r2.topRight.y);
+  if (cs.botLeft.x<=cs.topRight.x && cs.botLeft.y<=cs.topRight.y) {
+    return cs;
+  } else {
+    return CxRect2(0,0,0,0);
+  }//if
+}
+
+CxPoint2 CxRect2::Center() const
+/*
+ * Returns the center point of rectangle.
+ */
+{
+  return CxPoint2((topRight.x+botLeft.x)/2.0f, (topRight.y+botLeft.y)/2.0f);
+}
+
+float CxRect2::Width() const
+//returns rectangle width
+{
+  return topRight.x-botLeft.x;
+}
+
+float CxRect2::Height() const
+//returns rectangle height
+{
+  return topRight.y-botLeft.y;
+}
+
-- 
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