Thread: Pathfinder for using objects

Originally Posted by Kris

ObjectDefinitions#opcode69 determines from which side(s) the objects can be interacted with. Implement that into your pathfinder if it isn't already there.

Those stairs do not have value set on that opcode.

Originally Posted by Kris

You're right. This means you have to force the location for it server-side

No you don't, those fences either side of it each ladder prevents them from being interacted with from the left/right.

Originally Posted by Kris

ObjectDefinitions#opcode69 determines from which side(s) the objects can be interacted with. Implement that into your pathfinder if it isn't already there.

Yeah, the last four bits of this 'surroundings' bitmask control whether or not the pathfinder considers an object to have been reached if approached from that side (the other bits aren't used, at least in 3xx). 0 means reachable from that side, 1 means unreachable, and it's ordered WESN (i.e. the last bit states whether or not the object is reached when standing one tile north of it).

Code:

	public boolean reached(int x, int y, int minX, int minY, int rangeX, int rangeY, int surroundings) {
		int maxX = (minX + rangeX) - 1;
		int maxY = (minY + rangeY) - 1;

		if (x >= minX && x <= maxX && y >= minY && y <= maxY) { // inside target area
			return true;
		} else if (x == minX - 1 && y >= minY && y <= maxY && (matrix[x][y] & WALL_EAST) == 0 && (surroundings & 0x8) == 0) {
			return true;
		} else if (x == maxX + 1 && y >= minY && y <= maxY && (matrix[x][y] & WALL_WEST) == 0 && (surroundings & 0x2) == 0) {
			return true;
		} else if (y == minY - 1 && x >= minX && x <= maxX && (matrix[x][y] & WALL_NORTH) == 0 && (surroundings & 0x4) == 0) {
			return true;
		} else if (y == maxY + 1 && x >= minX && x <= maxX && (matrix[x][y] & WALL_SOUTH) == 0 && (surroundings & 0x1) == 0) {
			return true;
		}

		return false;
	}

Also worth noting that only three object types support this: 10, 11, 22 (which are 'general object category i never found a name for', that same category just rotated 45 degrees, and ground decorations).

Kind of solved this, just wondering if theres a better way to get the surrounding tiles than this kind of loop:

Code:

public Position findTileToUseObjectFrom(GameObjectDef def, GameObjectData object){
		Position walkToPos = null;
		int x = def.getPosition().getX();
		int y = def.getPosition().getY();
		int sizeX = object.getSizeX(def.getFace())-1;
		int sizeY = object.getSizeY(def.getFace())-1;
		for(int i = x-1; i <= x+sizeX+1; i++) {
		    for(int j = y-1; j <= y+sizeY+1; j++) {
		        if(i >= x && i <= x+sizeX && j >= y && j <= y+sizeY){
		        	//these tiles are part of the object
		        } else {
		        	//these tiles are the surrounding tiles
		        }
		    }
		}
		return null;
	}