mirror of
https://github.com/libretro/scummvm.git
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361 lines
9.7 KiB
C++
361 lines
9.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "scumm/scumm.h"
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#include "scumm/actor.h"
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#include "scumm/charset.h"
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#include "scumm/scumm_v7.h"
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#include "common/util.h"
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namespace Scumm {
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void ScummEngine::setCameraAtEx(int at) {
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if (_game.version < 7) {
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camera._mode = kNormalCameraMode;
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camera._cur.x = at;
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setCameraAt(at, 0);
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camera._movingToActor = false;
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}
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}
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void ScummEngine::setCameraAt(int pos_x, int pos_y) {
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if (camera._mode != kFollowActorCameraMode || ABS(pos_x - camera._cur.x) > (_screenWidth / 2)) {
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camera._cur.x = pos_x;
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}
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camera._dest.x = pos_x;
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if (VAR_CAMERA_MIN_X != 0xFF && camera._cur.x < VAR(VAR_CAMERA_MIN_X))
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camera._cur.x = (short) VAR(VAR_CAMERA_MIN_X);
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if (VAR_CAMERA_MAX_X != 0xFF && camera._cur.x > VAR(VAR_CAMERA_MAX_X))
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camera._cur.x = (short) VAR(VAR_CAMERA_MAX_X);
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if (VAR_SCROLL_SCRIPT != 0xFF && VAR(VAR_SCROLL_SCRIPT)) {
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VAR(VAR_CAMERA_POS_X) = camera._cur.x;
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runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0);
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}
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// If the camera moved and text is visible, remove it
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if (camera._cur.x != camera._last.x && _charset->_hasMask && _game.version > 3)
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stopTalk();
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}
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void ScummEngine::setCameraFollows(Actor *a, bool setCamera) {
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int t, i;
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camera._mode = kFollowActorCameraMode;
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camera._follows = a->_number;
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if (!a->isInCurrentRoom()) {
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startScene(a->getRoom(), 0, 0);
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camera._mode = kFollowActorCameraMode;
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camera._cur.x = a->getPos().x;
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setCameraAt(camera._cur.x, 0);
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}
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t = a->getPos().x / 8 - _screenStartStrip;
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if (t < camera._leftTrigger || t > camera._rightTrigger || setCamera == true)
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setCameraAt(a->getPos().x, 0);
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for (i = 1; i < _numActors; i++) {
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if (_actors[i]->isInCurrentRoom())
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_actors[i]->_needRedraw = true;
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}
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runInventoryScript(0);
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}
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void ScummEngine::clampCameraPos(Common::Point *pt) {
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pt->x = CLIP<short>(pt->x, VAR(VAR_CAMERA_MIN_X), VAR(VAR_CAMERA_MAX_X));
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pt->y = CLIP<short>(pt->y, VAR(VAR_CAMERA_MIN_Y), VAR(VAR_CAMERA_MAX_Y));
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}
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void ScummEngine::moveCamera() {
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int pos = camera._cur.x;
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int t;
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Actor *a = NULL;
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const bool snapToX = (_snapScroll || (VAR_CAMERA_FAST_X != 0xFF && VAR(VAR_CAMERA_FAST_X)));
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camera._cur.x &= 0xFFF8;
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if (VAR_CAMERA_MIN_X != 0xFF && camera._cur.x < VAR(VAR_CAMERA_MIN_X)) {
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if (snapToX)
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camera._cur.x = (short) VAR(VAR_CAMERA_MIN_X);
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else
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camera._cur.x += 8;
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cameraMoved();
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return;
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}
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if (VAR_CAMERA_MAX_X != 0xFF && camera._cur.x > VAR(VAR_CAMERA_MAX_X)) {
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if (snapToX)
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camera._cur.x = (short) VAR(VAR_CAMERA_MAX_X);
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else
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camera._cur.x -= 8;
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cameraMoved();
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return;
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}
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if (camera._mode == kFollowActorCameraMode) {
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a = derefActor(camera._follows, "moveCamera");
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int actorx = a->getPos().x;
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t = actorx / 8 - _screenStartStrip;
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if (t < camera._leftTrigger || t > camera._rightTrigger) {
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if (snapToX) {
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if (t > 40-5)
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camera._dest.x = actorx + 80;
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if (t < 5)
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camera._dest.x = actorx - 80;
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} else
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camera._movingToActor = true;
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}
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}
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if (camera._movingToActor) {
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a = derefActor(camera._follows, "moveCamera(2)");
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camera._dest.x = a->getPos().x;
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}
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if (VAR_CAMERA_MIN_X != 0xFF && camera._dest.x < VAR(VAR_CAMERA_MIN_X))
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camera._dest.x = (short) VAR(VAR_CAMERA_MIN_X);
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if (VAR_CAMERA_MAX_X != 0xFF && camera._dest.x > VAR(VAR_CAMERA_MAX_X))
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camera._dest.x = (short) VAR(VAR_CAMERA_MAX_X);
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if (snapToX) {
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camera._cur.x = camera._dest.x;
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} else {
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if (camera._cur.x < camera._dest.x)
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camera._cur.x += 8;
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if (camera._cur.x > camera._dest.x)
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camera._cur.x -= 8;
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}
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/* Actor 'a' is set a bit above */
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if (camera._movingToActor && (camera._cur.x / 8) == (a->getPos().x / 8)) {
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camera._movingToActor = false;
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}
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cameraMoved();
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if (VAR_SCROLL_SCRIPT != 0xFF && VAR(VAR_SCROLL_SCRIPT) && pos != camera._cur.x) {
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VAR(VAR_CAMERA_POS_X) = camera._cur.x;
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runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0);
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}
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}
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void ScummEngine::cameraMoved() {
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int screenLeft;
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if (_game.version >= 7) {
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assert(camera._cur.x >= (_screenWidth / 2) && camera._cur.y >= (_screenHeight / 2));
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} else {
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if (camera._cur.x < (_screenWidth / 2)) {
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camera._cur.x = (_screenWidth / 2);
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} else if (camera._cur.x > _roomWidth - (_screenWidth / 2)) {
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camera._cur.x = _roomWidth - (_screenWidth / 2);
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}
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}
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_screenStartStrip = camera._cur.x / 8 - _gdi->_numStrips / 2;
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_screenEndStrip = _screenStartStrip + _gdi->_numStrips - 1;
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_screenTop = camera._cur.y - (_screenHeight / 2);
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if (_game.version >= 7) {
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screenLeft = camera._cur.x - (_screenWidth / 2);
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} else {
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screenLeft = _screenStartStrip * 8;
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}
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_virtscr[kMainVirtScreen].xstart = screenLeft;
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}
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void ScummEngine::panCameraTo(int x, int y) {
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camera._dest.x = x;
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camera._mode = kPanningCameraMode;
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camera._movingToActor = false;
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}
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void ScummEngine::actorFollowCamera(int act) {
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if (_game.version < 7) {
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int old;
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old = camera._follows;
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setCameraFollows(derefActor(act, "actorFollowCamera"));
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if (camera._follows != old)
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runInventoryScript(0);
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camera._movingToActor = false;
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}
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}
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#ifdef ENABLE_SCUMM_7_8
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void ScummEngine_v7::setCameraAt(int pos_x, int pos_y) {
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Common::Point old;
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old = camera._cur;
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camera._cur.x = pos_x;
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camera._cur.y = pos_y;
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clampCameraPos(&camera._cur);
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camera._dest = camera._cur;
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VAR(VAR_CAMERA_DEST_X) = camera._dest.x;
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VAR(VAR_CAMERA_DEST_Y) = camera._dest.y;
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assert(camera._cur.x >= (_screenWidth / 2) && camera._cur.y >= (_screenHeight / 2));
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if (camera._cur.x != old.x || camera._cur.y != old.y) {
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if (VAR(VAR_SCROLL_SCRIPT)) {
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VAR(VAR_CAMERA_POS_X) = camera._cur.x;
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VAR(VAR_CAMERA_POS_Y) = camera._cur.y;
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runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0);
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}
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// Even though cameraMoved() is called automatically, we may
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// need to know at once that the camera has moved, or text may
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// be printed at the wrong coordinates. See bugs #795938 and
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// #929242
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cameraMoved();
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}
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}
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void ScummEngine_v7::setCameraFollows(Actor *a, bool setCamera) {
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byte oldfollow = camera._follows;
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int ax, ay;
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camera._follows = a->_number;
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VAR(VAR_CAMERA_FOLLOWED_ACTOR) = a->_number;
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if (!a->isInCurrentRoom()) {
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startScene(a->getRoom(), 0, 0);
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}
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ax = ABS(a->getPos().x - camera._cur.x);
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ay = ABS(a->getPos().y - camera._cur.y);
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if (ax > VAR(VAR_CAMERA_THRESHOLD_X) || ay > VAR(VAR_CAMERA_THRESHOLD_Y) || ax > (_screenWidth / 2) || ay > (_screenHeight / 2)) {
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setCameraAt(a->getPos().x, a->getPos().y);
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}
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if (a->_number != oldfollow)
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runInventoryScript(0);
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}
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void ScummEngine_v7::moveCamera() {
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Common::Point old = camera._cur;
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Actor *a = NULL;
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if (camera._follows) {
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a = derefActor(camera._follows, "moveCamera");
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if (ABS(camera._cur.x - a->getPos().x) > VAR(VAR_CAMERA_THRESHOLD_X) ||
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ABS(camera._cur.y - a->getPos().y) > VAR(VAR_CAMERA_THRESHOLD_Y)) {
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camera._movingToActor = true;
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if (VAR(VAR_CAMERA_THRESHOLD_X) == 0)
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camera._cur.x = a->getPos().x;
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if (VAR(VAR_CAMERA_THRESHOLD_Y) == 0)
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camera._cur.y = a->getPos().y;
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clampCameraPos(&camera._cur);
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}
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} else {
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camera._movingToActor = false;
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}
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if (camera._movingToActor) {
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VAR(VAR_CAMERA_DEST_X) = camera._dest.x = a->getPos().x;
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VAR(VAR_CAMERA_DEST_Y) = camera._dest.y = a->getPos().y;
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}
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assert(camera._cur.x >= (_screenWidth / 2) && camera._cur.y >= (_screenHeight / 2));
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clampCameraPos(&camera._dest);
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if (camera._cur.x < camera._dest.x) {
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camera._cur.x += (short) VAR(VAR_CAMERA_SPEED_X);
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if (camera._cur.x > camera._dest.x)
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camera._cur.x = camera._dest.x;
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}
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if (camera._cur.x > camera._dest.x) {
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camera._cur.x -= (short) VAR(VAR_CAMERA_SPEED_X);
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if (camera._cur.x < camera._dest.x)
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camera._cur.x = camera._dest.x;
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}
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if (camera._cur.y < camera._dest.y) {
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camera._cur.y += (short) VAR(VAR_CAMERA_SPEED_Y);
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if (camera._cur.y > camera._dest.y)
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camera._cur.y = camera._dest.y;
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}
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if (camera._cur.y > camera._dest.y) {
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camera._cur.y -= (short) VAR(VAR_CAMERA_SPEED_Y);
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if (camera._cur.y < camera._dest.y)
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camera._cur.y = camera._dest.y;
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}
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if (camera._cur.x == camera._dest.x && camera._cur.y == camera._dest.y) {
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camera._movingToActor = false;
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camera._accel.x = camera._accel.y = 0;
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VAR(VAR_CAMERA_SPEED_X) = VAR(VAR_CAMERA_SPEED_Y) = 0;
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} else {
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camera._accel.x += (short) VAR(VAR_CAMERA_ACCEL_X);
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camera._accel.y += (short) VAR(VAR_CAMERA_ACCEL_Y);
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VAR(VAR_CAMERA_SPEED_X) += camera._accel.x / 100;
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VAR(VAR_CAMERA_SPEED_Y) += camera._accel.y / 100;
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if (VAR(VAR_CAMERA_SPEED_X) > 8)
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VAR(VAR_CAMERA_SPEED_X) = 8;
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if (VAR(VAR_CAMERA_SPEED_Y) > 8)
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VAR(VAR_CAMERA_SPEED_Y) = 8;
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}
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cameraMoved();
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if (camera._cur.x != old.x || camera._cur.y != old.y) {
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VAR(VAR_CAMERA_POS_X) = camera._cur.x;
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VAR(VAR_CAMERA_POS_Y) = camera._cur.y;
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if (VAR(VAR_SCROLL_SCRIPT))
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runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0);
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}
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}
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void ScummEngine_v7::panCameraTo(int x, int y) {
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VAR(VAR_CAMERA_FOLLOWED_ACTOR) = camera._follows = 0;
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VAR(VAR_CAMERA_DEST_X) = camera._dest.x = x;
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VAR(VAR_CAMERA_DEST_Y) = camera._dest.y = y;
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}
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#endif
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} // End of namespace Scumm
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