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Diffstat (limited to 'engines/scumm/camera.cpp')
| -rw-r--r-- | engines/scumm/camera.cpp | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/engines/scumm/camera.cpp b/engines/scumm/camera.cpp new file mode 100644 index 0000000000..cc6d9bfaed --- /dev/null +++ b/engines/scumm/camera.cpp @@ -0,0 +1,367 @@ +/* ScummVM - Scumm Interpreter + * Copyright (C) 2001 Ludvig Strigeus + * Copyright (C) 2001-2006 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. + * + * $URL$ + * $Id$ + * + */ + +#include "common/stdafx.h" +#include "scumm/scumm.h" +#include "scumm/intern.h" +#include "scumm/actor.h" +#include "scumm/charset.h" + +namespace Scumm { + +void ScummEngine::setCameraAtEx(int at) { + if (!(_features & GF_NEW_CAMERA)) { + camera._mode = kNormalCameraMode; + camera._cur.x = at; + setCameraAt(at, 0); + camera._movingToActor = false; + } +} + +void ScummEngine::setCameraAt(int pos_x, int pos_y) { + if (camera._mode != kFollowActorCameraMode || ABS(pos_x - camera._cur.x) > (_screenWidth / 2)) { + camera._cur.x = pos_x; + } + camera._dest.x = pos_x; + + if (camera._cur.x < VAR(VAR_CAMERA_MIN_X)) + camera._cur.x = (short) VAR(VAR_CAMERA_MIN_X); + + if (camera._cur.x > VAR(VAR_CAMERA_MAX_X)) + camera._cur.x = (short) VAR(VAR_CAMERA_MAX_X); + + if (VAR_SCROLL_SCRIPT != 0xFF && VAR(VAR_SCROLL_SCRIPT)) { + VAR(VAR_CAMERA_POS_X) = camera._cur.x; + runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0); + } + + // If the camera moved and text is visible, remove it + if (camera._cur.x != camera._last.x && _charset->_hasMask && _version > 3) + stopTalk(); +} + +void ScummEngine::setCameraFollows(Actor *a) { + + int t, i; + + camera._mode = kFollowActorCameraMode; + camera._follows = a->_number; + + if (!a->isInCurrentRoom()) { + startScene(a->getRoom(), 0, 0); + camera._mode = kFollowActorCameraMode; + camera._cur.x = a->_pos.x; + setCameraAt(camera._cur.x, 0); + } + + t = a->_pos.x / 8 - _screenStartStrip; + + if (t < camera._leftTrigger || t > camera._rightTrigger) + setCameraAt(a->_pos.x, 0); + + for (i = 1; i < _numActors; i++) { + if (_actors[i].isInCurrentRoom()) + _actors[i]._needRedraw = true; + } + runInventoryScript(0); +} + +void ScummEngine::clampCameraPos(Common::Point *pt) { + if (pt->x < VAR(VAR_CAMERA_MIN_X)) + pt->x = (short) VAR(VAR_CAMERA_MIN_X); + + if (pt->x > VAR(VAR_CAMERA_MAX_X)) + pt->x = (short) VAR(VAR_CAMERA_MAX_X); + + if (pt->y < VAR(VAR_CAMERA_MIN_Y)) + pt->y = (short) VAR(VAR_CAMERA_MIN_Y); + + if (pt->y > VAR(VAR_CAMERA_MAX_Y)) + pt->y = (short) VAR(VAR_CAMERA_MAX_Y); +} + +void ScummEngine::moveCamera() { + int pos = camera._cur.x; + int actorx, t; + Actor *a = NULL; + + camera._cur.x &= 0xFFF8; + + if (camera._cur.x < VAR(VAR_CAMERA_MIN_X)) { + if (VAR_CAMERA_FAST_X != 0xFF && VAR(VAR_CAMERA_FAST_X)) + camera._cur.x = (short) VAR(VAR_CAMERA_MIN_X); + else + camera._cur.x += 8; + cameraMoved(); + return; + } + + if (camera._cur.x > VAR(VAR_CAMERA_MAX_X)) { + if (VAR_CAMERA_FAST_X != 0xFF && VAR(VAR_CAMERA_FAST_X)) + camera._cur.x = (short) VAR(VAR_CAMERA_MAX_X); + else + camera._cur.x -= 8; + cameraMoved(); + return; + } + + if (camera._mode == kFollowActorCameraMode) { + a = derefActor(camera._follows, "moveCamera"); + + actorx = a->_pos.x; + t = actorx / 8 - _screenStartStrip; + + if (t < camera._leftTrigger || t > camera._rightTrigger) { + if (VAR_CAMERA_FAST_X != 0xFF && VAR(VAR_CAMERA_FAST_X)) { + if (t > 35) + camera._dest.x = actorx + 80; + if (t < 5) + camera._dest.x = actorx - 80; + } else + camera._movingToActor = true; + } + } + + if (camera._movingToActor) { + a = derefActor(camera._follows, "moveCamera(2)"); + camera._dest.x = a->_pos.x; + } + + if (camera._dest.x < VAR(VAR_CAMERA_MIN_X)) + camera._dest.x = (short) VAR(VAR_CAMERA_MIN_X); + + if (camera._dest.x > VAR(VAR_CAMERA_MAX_X)) + camera._dest.x = (short) VAR(VAR_CAMERA_MAX_X); + + if (VAR_CAMERA_FAST_X != 0xFF && VAR(VAR_CAMERA_FAST_X)) { + camera._cur.x = camera._dest.x; + } else { + if (camera._cur.x < camera._dest.x) + camera._cur.x += 8; + if (camera._cur.x > camera._dest.x) + camera._cur.x -= 8; + } + + /* a is set a bit above */ + if (camera._movingToActor && (camera._cur.x / 8) == (a->_pos.x / 8)) { + camera._movingToActor = false; + } + + cameraMoved(); + + if (VAR_SCROLL_SCRIPT != 0xFF && VAR(VAR_SCROLL_SCRIPT) && pos != camera._cur.x) { + VAR(VAR_CAMERA_POS_X) = camera._cur.x; + runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0); + } +} + +void ScummEngine::cameraMoved() { + int screenLeft; + if (_features & GF_NEW_CAMERA) { + assert(camera._cur.x >= (_screenWidth / 2) && camera._cur.y >= (_screenHeight / 2)); + } else { + if (camera._cur.x < (_screenWidth / 2)) { + camera._cur.x = (_screenWidth / 2); + } else if (camera._cur.x > _roomWidth - (_screenWidth / 2)) { + camera._cur.x = _roomWidth - (_screenWidth / 2); + } + } + + _screenStartStrip = camera._cur.x / 8 - gdi._numStrips / 2; + _screenEndStrip = _screenStartStrip + gdi._numStrips - 1; + + _screenTop = camera._cur.y - (_screenHeight / 2); + if (_features & GF_NEW_CAMERA) { + screenLeft = camera._cur.x - (_screenWidth / 2); + } else { + screenLeft = _screenStartStrip * 8; + } + + virtscr[0].xstart = screenLeft; +} + +void ScummEngine::panCameraTo(int x, int y) { + camera._dest.x = x; + camera._mode = kPanningCameraMode; + camera._movingToActor = false; +} + +void ScummEngine::actorFollowCamera(int act) { + if (!(_features & GF_NEW_CAMERA)) { + int old; + + old = camera._follows; + setCameraFollows(derefActor(act, "actorFollowCamera")); + if (camera._follows != old) + runInventoryScript(0); + + camera._movingToActor = false; + } +} + +#ifndef DISABLE_SCUMM_7_8 +void ScummEngine_v7::setCameraAt(int pos_x, int pos_y) { + Common::Point old; + + old = camera._cur; + + camera._cur.x = pos_x; + camera._cur.y = pos_y; + + clampCameraPos(&camera._cur); + + camera._dest = camera._cur; + VAR(VAR_CAMERA_DEST_X) = camera._dest.x; + VAR(VAR_CAMERA_DEST_Y) = camera._dest.y; + + assert(camera._cur.x >= (_screenWidth / 2) && camera._cur.y >= (_screenHeight / 2)); + + if (camera._cur.x != old.x || camera._cur.y != old.y) { + if (VAR(VAR_SCROLL_SCRIPT)) { + VAR(VAR_CAMERA_POS_X) = camera._cur.x; + VAR(VAR_CAMERA_POS_Y) = camera._cur.y; + runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0); + } + + // Even though cameraMoved() is called automatically, we may + // need to know at once that the camera has moved, or text may + // be printed at the wrong coordinates. See bugs #795938 and + // #929242 + cameraMoved(); + } +} + +void ScummEngine_v7::setCameraFollows(Actor *a) { + + byte oldfollow = camera._follows; + int ax, ay; + + camera._follows = a->_number; + VAR(VAR_CAMERA_FOLLOWED_ACTOR) = a->_number; + + if (!a->isInCurrentRoom()) { + startScene(a->getRoom(), 0, 0); + } + + ax = ABS(a->_pos.x - camera._cur.x); + ay = ABS(a->_pos.y - camera._cur.y); + + if (ax > VAR(VAR_CAMERA_THRESHOLD_X) || ay > VAR(VAR_CAMERA_THRESHOLD_Y) || ax > (_screenWidth / 2) || ay > (_screenHeight / 2)) { + setCameraAt(a->_pos.x, a->_pos.y); + } + + if (a->_number != oldfollow) + runInventoryScript(0); +} + +void ScummEngine_v7::moveCamera() { + Common::Point old = camera._cur; + Actor *a = NULL; + + if (camera._follows) { + a = derefActor(camera._follows, "moveCamera"); + if (ABS(camera._cur.x - a->_pos.x) > VAR(VAR_CAMERA_THRESHOLD_X) || + ABS(camera._cur.y - a->_pos.y) > VAR(VAR_CAMERA_THRESHOLD_Y)) { + camera._movingToActor = true; + if (VAR(VAR_CAMERA_THRESHOLD_X) == 0) + camera._cur.x = a->_pos.x; + if (VAR(VAR_CAMERA_THRESHOLD_Y) == 0) + camera._cur.y = a->_pos.y; + clampCameraPos(&camera._cur); + } + } else { + camera._movingToActor = false; + } + + if (camera._movingToActor) { + VAR(VAR_CAMERA_DEST_X) = camera._dest.x = a->_pos.x; + VAR(VAR_CAMERA_DEST_Y) = camera._dest.y = a->_pos.y; + } + + assert(camera._cur.x >= (_screenWidth / 2) && camera._cur.y >= (_screenHeight / 2)); + + clampCameraPos(&camera._dest); + + if (camera._cur.x < camera._dest.x) { + camera._cur.x += (short) VAR(VAR_CAMERA_SPEED_X); + if (camera._cur.x > camera._dest.x) + camera._cur.x = camera._dest.x; + } + + if (camera._cur.x > camera._dest.x) { + camera._cur.x -= (short) VAR(VAR_CAMERA_SPEED_X); + if (camera._cur.x < camera._dest.x) + camera._cur.x = camera._dest.x; + } + + if (camera._cur.y < camera._dest.y) { + camera._cur.y += (short) VAR(VAR_CAMERA_SPEED_Y); + if (camera._cur.y > camera._dest.y) + camera._cur.y = camera._dest.y; + } + + if (camera._cur.y > camera._dest.y) { + camera._cur.y -= (short) VAR(VAR_CAMERA_SPEED_Y); + if (camera._cur.y < camera._dest.y) + camera._cur.y = camera._dest.y; + } + + if (camera._cur.x == camera._dest.x && camera._cur.y == camera._dest.y) { + + camera._movingToActor = false; + camera._accel.x = camera._accel.y = 0; + VAR(VAR_CAMERA_SPEED_X) = VAR(VAR_CAMERA_SPEED_Y) = 0; + } else { + + camera._accel.x += (short) VAR(VAR_CAMERA_ACCEL_X); + camera._accel.y += (short) VAR(VAR_CAMERA_ACCEL_Y); + + VAR(VAR_CAMERA_SPEED_X) += camera._accel.x / 100; + VAR(VAR_CAMERA_SPEED_Y) += camera._accel.y / 100; + + if (VAR(VAR_CAMERA_SPEED_X) < 8) + VAR(VAR_CAMERA_SPEED_X) = 8; + + if (VAR(VAR_CAMERA_SPEED_Y) < 8) + VAR(VAR_CAMERA_SPEED_Y) = 8; + + } + + cameraMoved(); + + if (camera._cur.x != old.x || camera._cur.y != old.y) { + VAR(VAR_CAMERA_POS_X) = camera._cur.x; + VAR(VAR_CAMERA_POS_Y) = camera._cur.y; + + if (VAR(VAR_SCROLL_SCRIPT)) + runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0); + } +} + +void ScummEngine_v7::panCameraTo(int x, int y) { + VAR(VAR_CAMERA_FOLLOWED_ACTOR) = camera._follows = 0; + VAR(VAR_CAMERA_DEST_X) = camera._dest.x = x; + VAR(VAR_CAMERA_DEST_Y) = camera._dest.y = y; +} +#endif + +} // End of namespace Scumm |