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This PR adds a new `IsPointInSector` function that lets you check if a specific point (by coordinates) is inside one or more sectors in a room. The function takes an array of IDs (sometimes called server IDs), so you can check multiple sectors at once. The main reason for adding this is to help catch players who hang around too long in guild hall door sectors, but it’s flexible enough to be useful in other situations too. ### Sector Geometry Loading on Startup When the server starts up, it loads sector geometry from the room files. Each sector’s polygons get stored as arrays of vertex coordinates. ### IsPointInSector Coordinate Lookup Process `IsPointInSector` converts Blakod coordinates to fine coordinates, grabs the room data, and loops through the sectors. It looks for sectors with IDs matching any of the provided user IDs, and for each match, uses ray-casting to see if the point is inside the sector’s polygon. ### Memory Usage Changes **BEFORE:** Memory Allocated: 30096561 bytes **AFTER:** Memory Allocated: 34324621 bytes **DIFFERENCE:** 4,228,060 bytes / 4.22806 Megabytes ### Example: Guild Hall 11 (`guildh11`) (removed) As a demo, I’ve updated `ghall.kod` and `guildh11.kod` to use this new function. To try it out: open the hall’s entrance door and stand in either of the two door sectors. Let the door close, and after a short delay, you’ll be teleported to the foyer. Modify `plDoorSectors` to test other scenarios, like an invalid sector id or a single integer: ``` plDoorSectors = [ MAINDOOR, MAINDOOR2 ]; // original plDoorSectors = MAINDOOR; // single sector check plDoorSectors = [ MAINDOOR, MAINDOOR2, "foo" ]; // invalid sector id, should still work ``` ### Usage Examples A single usage example was originally included included but removed in favor of a follow-up PR. The following is an example of how this could be used, though there's a bit more work needed to support it that can be seen in https://github.com/Meridian59/Meridian59/pull/1189/changes/a936b59e0027042d3d2fb2f92a75287cb9fb4809 ``` // Check single user ID if IsPointInSector(prmRoom, Send(who,@GetRow), Send(who,@GetCol), Send(who,@GetFineRow), Send(who,@GetFineCol), DOOR_SECTOR_ID) { // Point is in sector for this user } ```
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
// Meridian 59, Copyright 1994-2012 Andrew Kirmse and Chris Kirmse.
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// All rights reserved.
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//
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// This software is distributed under a license that is described in
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// the LICENSE file that accompanies it.
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//
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// Meridian is a registered trademark.
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/*
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* roomtype.h:
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*/
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#ifndef _ROOMTYPE_H
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#define _ROOMTYPE_H
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#include <vector>
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struct server_polygon {
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int num_vertices;
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int *vertices_x;
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int *vertices_y;
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};
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// Stores polygon data for a single sector
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struct server_sector
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{
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int id; // server id of the sector
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std::vector<server_polygon> polygons; // array of sector polygons
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};
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/* Room contents to draw */
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typedef struct
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{
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short rows; /* Size of room in grid squares */
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short cols;
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int width, height; /* Size of room in FINENESS units */
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unsigned char **grid; /* Array that tells whether its legal to move between adjacent squares
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* (used only in server) */
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unsigned char **flags; /* Array that gives per-square flags
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* (used only in server) */
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unsigned char **monster_grid; /* Array that tells whether its legal for monsters to move between adjacent squares (used only in server) */
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int bkgnd; /* Resource ID of background bitmap; 0 if none */
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unsigned char ambient_light; /* Intensity of ambient light, 0 = min, 15 = max */
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int security; /* Security number, unique to each roo file, to ensure that client
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loads the correct roo file */
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std::vector<server_sector> sectors;
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} room_type;
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#endif /* #ifndef _ROOMTYPE_H */
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