11 files changed, 124 insertions, 27 deletions

diff --git a/src/model/exp004state.h b/src/model/exp004state.h
index 1af8a5b..5a9761a 100644
--- a/src/model/exp004state.h
+++ b/src/model/exp004state.h
@@ -16,14 +16,16 @@
 #define DEFAULT_COLOR_R 0.00
 #define DEFAULT_COLOR_G 0.00
 #define DEFAULT_COLOR_B 0.01
-#define DEFAULT_COLOR_A 0.25
+#define DEFAULT_COLOR_A (1.0 / 7.0)
 
 #define SELECT_COLOR_R 0.00
 #define SELECT_COLOR_G 0.00
 #define SELECT_COLOR_B 0.00
 #define SELECT_COLOR_A 0.75
 
-typedef enum { PROTEIN_GEOMETRY } LISTS;
+typedef enum
+{ PROTEIN_GEOMETRY, DENSITY_LEGEND_GEOMETRY } LISTS;
+#define NUM_LISTS 2
 
 /*
  * Maintain state of the model.
@@ -61,10 +63,10 @@ typedef struct
    */
   struct
   {
-    float min_x;
-    float max_x;
-    float min_y;
-    float max_y;
+    double min_x;
+    double max_x;
+    double min_y;
+    double max_y;
   } ortho;
 
   /*