1 files changed, 97 insertions, 0 deletions
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;
+}
+