1 files changed, 92 insertions, 0 deletions
diff --git a/Stars45/Grid.cpp b/Stars45/Grid.cpp
new file mode 100644
index 0000000..b4b75c9
--- /dev/null
+++ b/Stars45/Grid.cpp
@@ -0,0 +1,92 @@
+/*  Project Starshatter 4.5
+    Destroyer Studios LLC
+    Copyright © 1997-2004. All Rights Reserved.
+
+    SUBSYSTEM:    Stars.exe
+    FILE:         Grid.cpp
+    AUTHOR:       John DiCamillo
+
+
+    OVERVIEW
+    ========
+    Tactical Grid class
+*/
+
+#include "MemDebug.h"
+#include "Grid.h"
+
+#include "Game.h"
+#include "Video.h"
+#include "Window.h"
+
+static const Color DARK_LINE( 8,  8,  8);
+static const Color LITE_LINE(16, 16, 16);
+
+// +--------------------------------------------------------------------+
+
+Grid::Grid(int asize, int astep)
+   : size(asize), step(astep), drawn(0)
+{
+   radius = (float) (size * 1.414);
+}
+
+Grid::~Grid()
+{ }
+
+// +--------------------------------------------------------------------+
+
+int  Grid::CollidesWith(Graphic& o)                { return 0; }
+
+// +--------------------------------------------------------------------+
+
+void Grid::Render(Video* video, DWORD flags)
+{
+   if (!video || hidden) return;
+
+   int c = 0;
+   Color line;
+   
+   for (int i = 0; i <= size; i += step) {
+      Point p1( i, 0, -size); p1 += Location();
+      Point p2( i, 0,  size); p2 += Location();
+      Point p3(-i, 0, -size); p3 += Location();
+      Point p4(-i, 0,  size); p4 += Location();
+      
+      if (c) line = DARK_LINE;
+      else   line = LITE_LINE;
+
+      DrawLine(video, p1,p2,line);
+      DrawLine(video, p3,p4,line);
+
+      c++;
+      if (c > 3) c = 0;
+   }
+   
+   c = 0;
+
+   for (i = 0; i <= size; i += step) {
+      Point p1(-size, 0,  i); p1 += Location();
+      Point p2( size, 0,  i); p2 += Location();
+      Point p3(-size, 0, -i); p3 += Location();
+      Point p4( size, 0, -i); p4 += Location();
+      
+      if (c) line = DARK_LINE;
+      else   line = LITE_LINE;
+
+      DrawLine(video, p1,p2,line);
+      DrawLine(video, p3,p4,line);
+
+      c++;
+      if (c > 3) c = 0;
+   }
+}
+   
+void Grid::DrawLine(Video* video, Point& p1, Point& p2, Color grid_color)
+{
+   Vec3 v[2];
+
+   v[0] = p1;
+   v[1] = p2;
+
+   video->DrawLines(1, v, grid_color, Video::BLEND_ADDITIVE);
+}