Fix all 3 known bugs

* Sensor sometimes triggers when tank directly behind it
* Sensor range 0 screws up sensor order in canvas
* Summary not sorted

ctanks.c

@@ -131,7 +131,7 @@ tanks_fire_cannon(struct tanks_game *game,
   rpos[0] = vector[0];
   rpos[1] = vector[1];
   rotate_point(-theta, rpos);
-  if (fabsf(rpos[1]) < TANK_RADIUS) {
+  if ((rpos[0] > 0) && (fabsf(rpos[1]) < TANK_RADIUS)) {
     that->killer = this;
     that->cause_death = "shot";
   }
@@ -204,7 +204,7 @@ tanks_sensor_calc(struct tanks_game *game,
     /* Now check if the edge of the arc intersects the tank.  Do this
        just like with firing. */
     rotate_point(this->sensors[i].width / -2, rpos);
-    if (fabsf(rpos[1]) < TANK_RADIUS) {
+    if ((rpos[0] > 0) && (fabsf(rpos[1]) < TANK_RADIUS)) {
       this->sensors[i].triggered = 1;
     }
   }

dump.h

@@ -1,6 +1,8 @@
 #ifndef __DUMP_H__
 
-/* Debugging help */
+#include <stdio.h>
+
+/* Debugging */
 #define DUMPf(fmt, args...) fprintf(stderr, "%s:%s:%d " fmt "\n", __FILE__, __FUNCTION__, __LINE__, ##args)
 #define DUMP() DUMPf("")
 #define DUMP_d(v) DUMPf("%s = %d", #v, v)
@@ -11,4 +13,15 @@
 #define DUMP_p(v) DUMPf("%s = %p", #v, v)
 #define DUMP_xy(v) DUMPf("%s = (%f, %f)", #v, v[0], v[1]);
 
+/* Tektronix 4014 drawing */
+#define TEK_ENABLE "\033[?38h"
+#define TEK_DISABLE "\033\003"
+#define TEK(fmt, args...) fprintf(stderr, TEK_ENABLE fmt TEK_DISABLE, ##args)
+#define TEK_coord(x, y) ((int)y/32)+32,((int)y%32)+96,((int)x/32)+32,((int)x%32)+64
+
+#define TEK_cls() TEK("\033\014")
+#define TEK_line(x1, y1, x2, y2) TEK("\035%c%c%c%c%c%c%c%c", TEK_coord(x1, y1), TEK_coord(x2, y2))
+#define TEK_point(x, y) TEK("\034%c%c%c%c", TEK_coord(x, y))
+#define TEK_text(x, y, s) TEK("\035%c%c%c%c\037%s", TEK_coord(x, y), s)
+
 #endif

run-tanks.c

@@ -361,14 +361,15 @@ print_header(FILE              *f,
       struct sensor *s = &(tanks[i].sensors[j]);
 
       if (! s->range) {
-        continue;
-      }
+        fprintf(f, "0,");
+      } else {
         fprintf(f, "[%d,%.2f,%.2f,%d],",
                 (int)(s->range),
                 s->angle,
                 s->width,
                 s->turret);
       }
+    }
     fprintf(f, "]],\n");
   }
   fprintf(f, "],[\n");
@@ -535,6 +536,7 @@ main(int argc, char *argv[])
       mytanks[i].position[1] = (float)y;
       mytanks[i].angle = deg2rad(rand() % 360);
       mytanks[i].turret.current = deg2rad(rand() % 360);
+      mytanks[i].turret.desired = mytanks[i].turret.current;
 
       x += SPACING;
       if (x > game.size[0]) {

summary.awk

@@ -55,8 +55,8 @@ BEGIN {
         # Find highest score
         maxscore = -1;
         for (p in scores) {
-            if (p > maxscore) {
-                maxscore = p;
+            if (int(p) > maxscore) {
+                maxscore = int(p);
             }
         }
         if (maxscore == -1) {

tanks.js

@@ -26,6 +26,10 @@ function Tank(ctx, width, height, color, sensors) {
     this.sensors = new Array();
     for (i in sensors) {
         var s = sensors[i];
+
+        if (! s) {
+            this.sensors[i] = [0,0,0,0];
+        } else {
             // r, angle, width, turret
             this.sensors[i] = new Array();
             this.sensors[i][0] = s[0];
@@ -36,6 +40,7 @@ function Tank(ctx, width, height, color, sensors) {
                 maxlen = s[0];
             }
         }
+    }
 
     // Set up our state, for later interleaved draw requests
     this.set_state = function(x, y, rotation, turret, flags, sensor_state) {