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-/* Copyright (C) 1994-1998 Revolution Software Ltd.
- * Copyright (C) 2003-2006 The ScummVM project
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * $URL$
- * $Id$
- */
-
-// WALKER.CPP by James (14nov96)
-
-// Functions for moving megas about the place & also for keeping tabs on them
-
-#include "common/stdafx.h"
-#include "sword2/sword2.h"
-#include "sword2/defs.h"
-#include "sword2/interpreter.h"
-#include "sword2/logic.h"
-#include "sword2/resman.h"
-#include "sword2/router.h"
-
-namespace Sword2 {
-
-void Router::setStandbyCoords(int16 x, int16 y, uint8 dir) {
- assert(dir <= 7);
-
- _standbyX = x;
- _standbyY = y;
- _standbyDir = dir;
-}
-
-/**
- * Work out direction from start to dest.
- */
-
-// Used in whatTarget(); not valid for all megas
-#define diagonalx 36
-#define diagonaly 8
-
-int Router::whatTarget(int startX, int startY, int destX, int destY) {
- int deltaX = destX - startX;
- int deltaY = destY - startY;
-
- // 7 0 1
- // 6 2
- // 5 4 3
-
- // Flat route
-
- if (ABS(deltaY) * diagonalx < ABS(deltaX) * diagonaly / 2)
- return (deltaX > 0) ? 2 : 6;
-
- // Vertical route
-
- if (ABS(deltaY) * diagonalx / 2 > ABS(deltaX) * diagonaly)
- return (deltaY > 0) ? 4 : 0;
-
- // Diagonal route
-
- if (deltaX > 0)
- return (deltaY > 0) ? 3 : 1;
-
- return (deltaY > 0) ? 5 : 7;
-}
-
-/**
- * Walk meta to (x,y,dir). Set RESULT to 0 if it succeeded. Otherwise, set
- * RESULT to 1. Return true if the mega has finished walking.
- */
-
-int Router::doWalk(byte *ob_logic, byte *ob_graph, byte *ob_mega, byte *ob_walkdata, int16 target_x, int16 target_y, uint8 target_dir) {
- ObjectLogic obLogic(ob_logic);
- ObjectGraphic obGraph(ob_graph);
- ObjectMega obMega(ob_mega);
-
- // If this is the start of the walk, calculate the route.
-
- if (obLogic.getLooping() == 0) {
- // If we're already there, don't even bother allocating
- // memory and calling the router, just quit back & continue
- // the script! This avoids an embarassing mega stand frame
- // appearing for one cycle when we're already in position for
- // an anim eg. repeatedly clicking on same object to repeat
- // an anim - no mega frame will appear in between runs of the
- // anim.
-
- if (obMega.getFeetX() == target_x && obMega.getFeetY() == target_y && obMega.getCurDir() == target_dir) {
- _vm->_logic->writeVar(RESULT, 0);
- return IR_CONT;
- }
-
- assert(target_dir <= 8);
-
- obMega.setWalkPc(0);
-
- // Set up mem for _walkData in route_slots[] & set mega's
- // 'route_slot_id' accordingly
- allocateRouteMem();
-
- int32 route = routeFinder(ob_mega, ob_walkdata, target_x, target_y, target_dir);
-
- // 0 = can't make route to target
- // 1 = created route
- // 2 = zero route but may need to turn
-
- if (route != 1 && route != 2) {
- freeRouteMem();
- _vm->_logic->writeVar(RESULT, 1);
- return IR_CONT;
- }
-
- // Walk is about to start
-
- obMega.setIsWalking(1);
- obLogic.setLooping(1);
- obGraph.setAnimResource(obMega.getMegasetRes());
- } else if (_vm->_logic->readVar(EXIT_FADING) && _vm->_screen->getFadeStatus() == RDFADE_BLACK) {
- // Double clicked an exit, and the screen has faded down to
- // black. Ok, that's it. Back to script and change screen.
-
- // We have to clear te EXIT_CLICK_ID variable in case there's a
- // walk instruction on the new screen, or it'd be cut short.
-
- freeRouteMem();
-
- obLogic.setLooping(0);
- obMega.setIsWalking(0);
- _vm->_logic->writeVar(EXIT_CLICK_ID, 0);
- _vm->_logic->writeVar(RESULT, 0);
-
- return IR_CONT;
- }
-
- // Get pointer to walkanim & current frame position
-
- WalkData *walkAnim = getRouteMem();
- int32 walk_pc = obMega.getWalkPc();
-
- // If stopping the walk early, overwrite the next step with a
- // slow-out, then finish
-
- if (_vm->_logic->checkEventWaiting() && walkAnim[walk_pc].step == 0 && walkAnim[walk_pc + 1].step == 1) {
- // At the beginning of a step
- earlySlowOut(ob_mega, ob_walkdata);
- }
-
- // Get new frame of walk
-
- obGraph.setAnimPc(walkAnim[walk_pc].frame);
- obMega.setCurDir(walkAnim[walk_pc].dir);
- obMega.setFeetX(walkAnim[walk_pc].x);
- obMega.setFeetY(walkAnim[walk_pc].y);
-
- // Is the NEXT frame is the end-marker (512) of the walk sequence?
-
- if (walkAnim[walk_pc + 1].frame != 512) {
- // No, it wasn't. Increment the walk-anim frame number and
- // come back next cycle.
- obMega.setWalkPc(obMega.getWalkPc() + 1);
- return IR_REPEAT;
- }
-
- // We have reached the end-marker, which means we can return to the
- // script just as the final (stand) frame of the walk is set.
-
- freeRouteMem();
- obLogic.setLooping(0);
- obMega.setIsWalking(0);
-
- // If George's walk has been interrupted to run a new action script for
- // instance or Nico's walk has been interrupted by player clicking on
- // her to talk
-
- // There used to be code here for checking if two megas were colliding,
- // but it had been commented out, and it was only run if a function
- // that always returned zero returned non-zero.
-
- if (_vm->_logic->checkEventWaiting()) {
- _vm->_logic->startEvent();
- _vm->_logic->writeVar(RESULT, 1);
- return IR_TERMINATE;
- }
-
- _vm->_logic->writeVar(RESULT, 0);
-
- // CONTINUE the script so that RESULT can be checked! Also, if an anim
- // command follows the fnWalk command, the 1st frame of the anim (which
- // is always a stand frame itself) can replace the final stand frame of
- // the walk, to hide the slight difference between the shrinking on the
- // mega frames and the pre-shrunk anim start-frame.
-
- return IR_CONT;
-}
-
-/**
- * Walk mega to start position of anim
- */
-
-int Router::walkToAnim(byte *ob_logic, byte *ob_graph, byte *ob_mega, byte *ob_walkdata, uint32 animRes) {
- int16 target_x = 0;
- int16 target_y = 0;
- uint8 target_dir = 0;
-
- // Walkdata is needed for earlySlowOut if player clicks elsewhere
- // during the walk.
-
- // If this is the start of the walk, read anim file to get start coords
-
- ObjectLogic obLogic(ob_logic);
-
- if (obLogic.getLooping() == 0) {
- byte *anim_file = _vm->_resman->openResource(animRes);
- AnimHeader anim_head;
-
- anim_head.read(_vm->fetchAnimHeader(anim_file));
-
- target_x = anim_head.feetStartX;
- target_y = anim_head.feetStartY;
- target_dir = anim_head.feetStartDir;
-
- _vm->_resman->closeResource(animRes);
-
- // If start coords not yet set in anim header, use the standby
- // coords (which should be set beforehand in the script).
-
- if (target_x == 0 && target_y == 0) {
- target_x = _standbyX;
- target_y = _standbyY;
- target_dir = _standbyDir;
- }
-
- assert(target_dir <= 7);
- }
-
- return doWalk(ob_logic, ob_graph, ob_mega, ob_walkdata, target_x, target_y, target_dir);
-}
-
-/**
- * Route to the left or right hand side of target id, if possible.
- */
-
-int Router::walkToTalkToMega(byte *ob_logic, byte *ob_graph, byte *ob_mega, byte *ob_walkdata, uint32 megaId, uint32 separation) {
- ObjectMega obMega(ob_mega);
-
- int16 target_x = 0;
- int16 target_y = 0;
- uint8 target_dir = 0;
-
- // If this is the start of the walk, calculate the route.
-
- ObjectLogic obLogic(ob_logic);
-
- if (obLogic.getLooping() == 0) {
- assert(_vm->_resman->fetchType(megaId) == GAME_OBJECT);
-
- // Call the base script. This is the graphic/mouse service
- // call, and will set _engineMega to the ObjectMega of mega we
- // want to route to.
-
- _vm->_logic->runResScript(megaId, 3);
-
- ObjectMega targetMega(_vm->_logic->getEngineMega());
-
- // Stand exactly beside the mega, ie. at same y-coord
- target_y = targetMega.getFeetY();
-
- int scale = obMega.calcScale();
- int mega_separation = (separation * scale) / 256;
-
- debug(4, "Target is at (%d, %d), separation %d", targetMega.getFeetX(), targetMega.getFeetY(), mega_separation);
-
- if (targetMega.getFeetX() < obMega.getFeetX()) {
- // Target is left of us, so aim to stand to their
- // right. Face down_left
-
- target_x = targetMega.getFeetX() + mega_separation;
- target_dir = 5;
- } else {
- // Ok, must be right of us so aim to stand to their
- // left. Face down_right.
-
- target_x = targetMega.getFeetX() - mega_separation;
- target_dir = 3;
- }
- }
-
- return doWalk(ob_logic, ob_graph, ob_mega, ob_walkdata, target_x, target_y, target_dir);
-}
-/**
- * Turn mega to the specified direction. Just needs to call doWalk() with
- * current feet coords, so router can produce anim of turn frames.
- */
-
-int Router::doFace(byte *ob_logic, byte *ob_graph, byte *ob_mega, byte *ob_walkdata, uint8 target_dir) {
- int16 target_x = 0;
- int16 target_y = 0;
-
- // If this is the start of the turn, get the mega's current feet
- // coords + the required direction
-
- ObjectLogic obLogic(ob_logic);
-
- if (obLogic.getLooping() == 0) {
- assert(target_dir <= 7);
-
- ObjectMega obMega(ob_mega);
-
- target_x = obMega.getFeetX();
- target_y = obMega.getFeetY();
- }
-
- return doWalk(ob_logic, ob_graph, ob_mega, ob_walkdata, target_x, target_y, target_dir);
-}
-
-/**
- * Turn mega to face point (x,y) on the floor
- */
-
-int Router::faceXY(byte *ob_logic, byte *ob_graph, byte *ob_mega, byte *ob_walkdata, int16 target_x, int16 target_y) {
- uint8 target_dir = 0;
-
- // If this is the start of the turn, get the mega's current feet
- // coords + the required direction
-
- ObjectLogic obLogic(ob_logic);
-
- if (obLogic.getLooping() == 0) {
- ObjectMega obMega(ob_mega);
-
- target_dir = whatTarget(obMega.getFeetX(), obMega.getFeetY(), target_x, target_y);
- }
-
- return doFace(ob_logic, ob_graph, ob_mega, ob_walkdata, target_dir);
-}
-
-/**
- * Turn mega to face another mega.
- */
-
-int Router::faceMega(byte *ob_logic, byte *ob_graph, byte *ob_mega, byte *ob_walkdata, uint32 megaId) {
- uint8 target_dir = 0;
-
- // If this is the start of the walk, decide where to walk to.
-
- ObjectLogic obLogic(ob_logic);
-
- if (obLogic.getLooping() == 0) {
- assert(_vm->_resman->fetchType(megaId) == GAME_OBJECT);
-
- // Call the base script. This is the graphic/mouse service
- // call, and will set _engineMega to the ObjectMega of mega we
- // want to turn to face.
-
- _vm->_logic->runResScript(megaId, 3);
-
- ObjectMega obMega(ob_mega);
- ObjectMega targetMega(_vm->_logic->getEngineMega());
-
- target_dir = whatTarget(obMega.getFeetX(), obMega.getFeetY(), targetMega.getFeetX(), targetMega.getFeetY());
- }
-
- return doFace(ob_logic, ob_graph, ob_mega, ob_walkdata, target_dir);
-}
-
-/**
- * Stand mega at (x,y,dir)
- * Sets up the graphic object, but also needs to set the new 'current_dir' in
- * the mega object, so the router knows in future
- */
-
-void Router::standAt(byte *ob_graph, byte *ob_mega, int32 x, int32 y, int32 dir) {
- assert(dir >= 0 && dir <= 7);
-
- ObjectGraphic obGraph(ob_graph);
- ObjectMega obMega(ob_mega);
-
- // Set up the stand frame & set the mega's new direction
-
- obMega.setFeetX(x);
- obMega.setFeetY(y);
- obMega.setCurDir(dir);
-
- // Mega-set animation file
- obGraph.setAnimResource(obMega.getMegasetRes());
-
- // Dir + first stand frame (always frame 96)
- obGraph.setAnimPc(dir + 96);
-}
-
-/**
- * Stand mega at end position of anim
- */
-
-void Router::standAfterAnim(byte *ob_graph, byte *ob_mega, uint32 animRes) {
- byte *anim_file = _vm->_resman->openResource(animRes);
- AnimHeader anim_head;
-
- anim_head.read(_vm->fetchAnimHeader(anim_file));
-
- int32 x = anim_head.feetEndX;
- int32 y = anim_head.feetEndY;
- int32 dir = anim_head.feetEndDir;
-
- _vm->_resman->closeResource(animRes);
-
- // If start coords not available either use the standby coords (which
- // should be set beforehand in the script)
-
- if (x == 0 && y == 0) {
- x = _standbyX;
- y = _standbyY;
- dir = _standbyDir;
- }
-
- standAt(ob_graph, ob_mega, x, y, dir);
-}
-
-void Router::standAtAnim(byte *ob_graph, byte *ob_mega, uint32 animRes) {
- byte *anim_file = _vm->_resman->openResource(animRes);
- AnimHeader anim_head;
-
- anim_head.read(_vm->fetchAnimHeader(anim_file));
-
- int32 x = anim_head.feetStartX;
- int32 y = anim_head.feetStartY;
- int32 dir = anim_head.feetStartDir;
-
- _vm->_resman->closeResource(animRes);
-
- // If start coords not available use the standby coords (which should
- // be set beforehand in the script)
-
- if (x == 0 && y == 0) {
- x = _standbyX;
- y = _standbyY;
- dir = _standbyDir;
- }
-
- standAt(ob_graph, ob_mega, x, y, dir);
-}
-
-} // End of namespace Sword2
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