From 59a60ef697d44284d89bc8a05990632bb2a56fb8 Mon Sep 17 00:00:00 2001
From: Don Pellegrino <don@coffee.donpellegrino.com>
Date: Fri, 14 Aug 2009 19:23:49 +0000
Subject: Modified to use dynamic memory allocation for the number of nodes.

---
diff --git a/src/model/exp004base.sqc b/src/model/exp004base.sqc
index 5c2d8d2..2879263 100644
--- a/src/model/exp004base.sqc
+++ b/src/model/exp004base.sqc
@@ -7,6 +7,7 @@
 #include "../util/check_error.h"
 #include <GL/glut.h>
 #include <string.h>
+#include <stdlib.h>
 #include "sqlca.h"
 extern struct sqlca sqlca;
 
@@ -29,8 +30,28 @@ exp004base (void)
    */
   EXEC SQL BEGIN DECLARE SECTION;
   EXEC SQL INCLUDE 'model/coordinates.h';
+  sqlint32 rows;
   EXEC SQL END DECLARE SECTION;
 
+  /* Determine how many nodes have coordinates assigned to them. */
+  EXEC SQL SELECT COUNT(*) INTO :rows FROM coordinates;
+
+  /* Free any existing coordinates and allocate memory to store the
+     new values. */
+  S.rows = rows;
+
+  free (S.selection.set);
+  S.selection.set = calloc (rows, sizeof (bool));
+
+  free (S.gi_data);
+  S.gi_data = calloc (rows * 20, sizeof (char));
+
+  free (S.base_vertices_data);
+  S.base_vertices_data = calloc (rows * 2, sizeof (float));
+
+  free (S.base_colors_data);
+  S.base_colors_data = calloc (rows * 4, sizeof (float));
+
   EXEC SQL DECLARE c2 CURSOR FOR SELECT *FROM coordinates;
 
   EXEC SQL OPEN c2;
@@ -48,29 +69,38 @@ exp004base (void)
     {
       int i = coordinates.coord_id - 1;
 
-      strncpy (S.gi_data[i], coordinates.gi.data, sizeof (S.gi_data[i]));
+      strncpy (S.gi_data + i, coordinates.gi.data, sizeof (S.gi_data[i]));
 
-      S.base_vertices_data[i][0] = coordinates.x;
-      S.base_vertices_data[i][1] = coordinates.y;
+      float* v = S.base_vertices_data + (i * 2);
+      *v = coordinates.x;
+      v++;
+      *v = coordinates.y;
 
-      if (S.base_vertices_data[i][0] < S.bb.min_x)
-	S.bb.min_x = S.base_vertices_data[i][0];
-      if (S.base_vertices_data[i][0] > S.bb.max_x)
-	S.bb.max_x = S.base_vertices_data[i][0];
-      if (S.base_vertices_data[i][1] < S.bb.min_y)
-	S.bb.min_y = S.base_vertices_data[i][1];
-      if (S.base_vertices_data[i][1] > S.bb.max_y)
-	S.bb.max_y = S.base_vertices_data[i][1];
+      v = S.base_vertices_data + (i * 2);
+      if (*v < S.bb.min_x)
+	S.bb.min_x = *v;
+      if (*v > S.bb.max_x)
+	S.bb.max_x = *v;
+
+      v++;
+      if (*v < S.bb.min_y)
+	S.bb.min_y = *v;
+      if (*v > S.bb.max_y)
+	S.bb.max_y = *v;
 
       /*
        * Deselected by default.
        */
       S.selection.set[i] = false;
 
-      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;
+      float* c = S.base_colors_data + (i * 4);
+      *c = DEFAULT_COLOR_R;
+      c++;
+      *c = DEFAULT_COLOR_G;
+      c++;
+      *c = DEFAULT_COLOR_B;
+      c++;
+      *c = DEFAULT_COLOR_A;
 
       EXEC SQL FETCH c2 INTO:coordinates;
     }
@@ -101,32 +131,40 @@ exp004base (void)
   S.ortho_max++;
 
   // Invert the y coordinate to match up with the LGL Java viewer.
-  for (int i = 0; i < ROWS; i++)
-    S.base_vertices_data[i][1] = S.ortho_max - S.base_vertices_data[i][1];
+  float* v = S.base_vertices_data;
+  for (int i = 0; i < S.rows; i++)
+    {
+      v++;
+      *v = S.ortho_max - *v;
+      v++;
+    }
 
   // 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++)
+  v = S.base_vertices_data;
+  for (int i = 0; i < S.rows; i++)
     {
-      S.base_vertices_data[i][0] =
-	S.base_vertices_data[i][0] - (0.5 * (S.bb.max_x - S.bb.min_x));
+      *v = *v - (0.5 * (S.bb.max_x - S.bb.min_x));
+
+      if (S.ortho_min > *v)
+	S.ortho_min = *v;
+
+      if (S.ortho_max < *v)
+	S.ortho_max = *v;
 
-      if (S.ortho_min > S.base_vertices_data[i][0])
-	S.ortho_min = S.base_vertices_data[i][0];
+      v++;
 
-      if (S.ortho_max < S.base_vertices_data[i][0])
-	S.ortho_max = S.base_vertices_data[i][0];
+      *v = *v - (0.5 * (S.bb.max_y - S.bb.min_y));
 
-      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 > *v)
+	S.ortho_min = *v;
 
-      if (S.ortho_min > S.base_vertices_data[i][1])
-	S.ortho_min = S.base_vertices_data[i][1];
+      if (S.ortho_max < *v)
+	S.ortho_max = *v;
 
-      if (S.ortho_max < S.base_vertices_data[i][1])
-	S.ortho_max = S.base_vertices_data[i][1];
+      v++;
     }
 
   glGenBuffers (2, S.buffers);
--
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