From a3cd765827764ec1f8789cc12946d56b1c52416f Mon Sep 17 00:00:00 2001
From: Don Pellegrino <don@drexel.edu>
Date: Tue, 16 Jun 2009 23:25:49 +0000
Subject: Added use of alpha.  Moved origin to the center to make use of

orthographic projection commands easier.

---
diff --git a/src/model/exp004base.sqc b/src/model/exp004base.sqc
index 6189b72..cbf2291 100644
--- a/src/model/exp004base.sqc
+++ b/src/model/exp004base.sqc
@@ -38,12 +38,6 @@ exp004base (void)
 
   EXEC SQL OPEN c2;
 
-  /*
-  FILE* coords = 
-    fopen ("/home/don/exp004/test/run20090514/run20090514.coords", "r");
-  int i = 0;
-  */
-
   /* 
    * Initialize the bounding box of the points.
    */
@@ -52,18 +46,9 @@ exp004base (void)
   S.bb.min_y = 0.0;
   S.bb.max_y = 0.0;
 
-  //  for (i = 0; i < ROWS; i++)
-
   EXEC SQL FETCH c2 INTO :coordinates;
   while (sqlca.sqlcode != 100)
     {
-      /*
-      fscanf (coords, "%s %f %f\n",
-	      S.gi_data[i],
-	      &S.base_vertices_data[i][0],
-	      &S.base_vertices_data[i][1]);
-      */
-
       int i = coordinates.coord_id;
 
       strncpy(S.gi_data[i], 
@@ -90,15 +75,14 @@ exp004base (void)
       S.base_colors_data[i][0] = DEFAULT_COLOR_R;
       S.base_colors_data[i][1] = DEFAULT_COLOR_G;
       S.base_colors_data[i][2] = DEFAULT_COLOR_B;
+      S.base_colors_data[i][3] = DEFAULT_COLOR_A;
 
       EXEC SQL FETCH c2 INTO :coordinates;
     }
 
   EXEC SQL CLOSE c2;
 
-  /*
-  fclose (coords);
-  */
+  EXEC SQL COMMIT;
 
   /*
    * Find the largest axis and use it to setup the projection.  This
@@ -126,6 +110,33 @@ exp004base (void)
     S.base_vertices_data[i][1] = 
       S.ortho_max - S.base_vertices_data[i][1];
 
+  // Move the origin (0,0) to the center of the data.
+  S.ortho_min = 0.0;
+  S.ortho_max = 0.0;
+
+  for (int i = 0; i < ROWS; i++)
+    {
+      S.base_vertices_data[i][0] = 
+	S.base_vertices_data[i][0] -
+	(0.5 * (S.bb.max_x - S.bb.min_x));
+
+      if (S.ortho_min > S.base_vertices_data[i][0])
+	S.ortho_min = S.base_vertices_data[i][0];
+
+      if (S.ortho_max < S.base_vertices_data[i][0])
+	S.ortho_max = S.base_vertices_data[i][0];
+
+      S.base_vertices_data[i][1] = 
+	S.base_vertices_data[i][1] -
+	(0.5 * (S.bb.max_y - S.bb.min_y));
+
+      if (S.ortho_min > S.base_vertices_data[i][1])
+	S.ortho_min = S.base_vertices_data[i][1];
+
+      if (S.ortho_max < S.base_vertices_data[i][1])
+	S.ortho_max = S.base_vertices_data[i][1];
+    }
+
   glGenBuffers (2, S.buffers);
 
   glBindBuffer (GL_ARRAY_BUFFER, S.buffers[BASE_VERTICES]);
@@ -135,7 +146,7 @@ exp004base (void)
 		GL_STATIC_DRAW);
 
   glBindBuffer (GL_ARRAY_BUFFER, S.buffers[BASE_COLORS]);
-  glColorPointer (3, GL_FLOAT, 0, 0);
+  glColorPointer (4, GL_FLOAT, 0, 0);
   glBufferData (GL_ARRAY_BUFFER,
 		sizeof (S.base_colors_data), S.base_colors_data,
 		GL_STATIC_DRAW);
--
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