Account for spawn dist in missile lookahead

buildsettings.h

@@ -17,7 +17,7 @@
 // #define PROFILING
 #define DEBUG_RENDERING
 // #define DEBUG_WORLD
-// #define UNLOCK_ALL
+#define UNLOCK_ALL
 #define TIME_BETWEEN_WORLD_SAVE 1.0f
 // #define INFINITE_RESOURCES
 #define DEBUG_TOOLS

gamestate.c

@@ -312,7 +312,7 @@ static void on_missile_shape(cpShape *shape, cpContactPointSet *points, void *da
 
     // lookahead by their velocity
     cpVect rel_velocity = cpvsub(entity_vel(gs, other), entity_vel(gs, launcher));
-    double dist = cpvdist(entity_pos(other), entity_pos(launcher));
+    double dist = cpvdist(entity_pos(other), entity_pos(launcher)) - MISSILE_SPAWN_DIST;
 
     double time_of_travel = sqrt((2.0 * dist) / (MISSILE_BURN_FORCE / MISSILE_MASS));
 
@@ -2902,8 +2902,7 @@ void process(struct GameState *gs, double dt)
                   Entity *new_missile = new_entity(gs);
                   create_missile(gs, new_missile);
                   new_missile->owning_squad = cur_box->owning_squad; // missiles have teams and attack eachother!
-                  double missile_spawn_dist = sqrt((BOX_SIZE / 2.0) * (BOX_SIZE / 2.0) * 2.0) + MISSILE_COLLIDER_SIZE.x / 2.0 + 0.1;
-                  cpBodySetPosition(new_missile->body, (cpvadd(entity_pos(cur_box), cpvspin((cpVect){.x = missile_spawn_dist, 0.0}, target.facing_angle))));
+                  cpBodySetPosition(new_missile->body, (cpvadd(entity_pos(cur_box), cpvspin((cpVect){.x = MISSILE_SPAWN_DIST, 0.0}, target.facing_angle))));
                   cpBodySetAngle(new_missile->body, target.facing_angle);
                   cpBodySetVelocity(new_missile->body, (box_vel(cur_box)));
                 }

types.h

@@ -29,6 +29,7 @@
 // centered on the sprite
 #define MISSILE_SPRITE_SIZE ((cpVect){.x = BOX_SIZE, .y = BOX_SIZE})
 #define MISSILE_COLLIDER_SIZE ((cpVect){.x = BOX_SIZE * 0.5f, .y = BOX_SIZE * 0.5f})
+#define MISSILE_SPAWN_DIST (sqrt((BOX_SIZE / 2.0) * (BOX_SIZE / 2.0) * 2.0) + MISSILE_COLLIDER_SIZE.x / 2.0 + 0.1)
 #define PLAYER_JETPACK_ROTATION_ENERGY_PER_SECOND 0.2f
 #define PLAYER_JETPACK_SPICE_PER_SECOND 0.08f
 #define SCANNER_ENERGY_USE 0.05f