Method aimAtPoint

plugins/siege-engine.cpp:1530–1563

    typedef df::proj_itemst interpose_base;

    void aimAtPoint(EngineInfo *engine, const ProjectilePath &path)
    {
        target_pos = path.target;

        // Debug
        if (debug_mode)
            set_arrow_color(path.goal, COLOR_LIGHTMAGENTA);

        PathMetrics raytrace(path);

        // Materialize map blocks, or the projectile will crash into them
        for (int i = 0; i < raytrace.collision_step; i++)
            Maps::ensureTileBlock(path[i]);

        // Find valid hit point for catapult stones
        if (flags.bits.high_flying)
        {
            if (raytrace.hits())
                fall_threshold = raytrace.goal_step;
            else
                fall_threshold = (raytrace.collision_z_step+raytrace.collision_step-1)/2;

            while (fall_threshold < raytrace.collision_step-1)
            {
                if (isTargetableTile(path[fall_threshold]))
                    break;

                fall_threshold++;
            }
        }

        fall_threshold = std::max(fall_threshold, engine->fire_range.first);
        fall_threshold = std::min(fall_threshold, engine->fire_range.second);
    }

    void aimAtPoint(EngineInfo *engine, int skill, const ProjectilePath &path)
    {