mirror of
https://github.com/libretro/scummvm.git
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482 lines
15 KiB
C++
482 lines
15 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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* 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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* 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 "illusions/illusions.h"
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#include "illusions/camera.h"
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#include "illusions/backgroundresource.h"
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#include "illusions/fixedpoint.h"
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#include "illusions/time.h"
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namespace Illusions {
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Camera::Camera(IllusionsEngine *vm)
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: _vm(vm) {
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_activeState._cameraMode = 6;
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_activeState._paused = false;
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_activeState._panStartTime = getCurrentTime();
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_activeState._panSpeed = 1;
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_activeState._bounds._topLeft.x = 320;
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_activeState._bounds._topLeft.y = 240;
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_activeState._bounds._bottomRight.x = 320;
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_activeState._bounds._bottomRight.y = 240;
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_activeState._currPan.x = 320;
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_activeState._currPan.y = 240;
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_activeState._panXShl = 320 << 16;
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_activeState._panYShl = 240 << 16;
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_activeState._panTargetPoint.x = 320;
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_activeState._panTargetPoint.y = 240;
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_activeState._panToPositionPtr = 0;
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_activeState._panNotifyId = 0;
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_activeState._trackingLimits.x = 0;
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_activeState._trackingLimits.y = 0;
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_activeState._centerPt.x = 320;
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_activeState._centerPt.y = 240;
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_activeState._pointFlags = 0;
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}
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void Camera::clearStack() {
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_stack.clear();
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}
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void Camera::set(Common::Point &panPoint, WidthHeight &dimensions) {
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_activeState._cameraMode = 6;
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_activeState._paused = false;
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_activeState._panStartTime = getCurrentTime();
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_activeState._panSpeed = 1;
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_activeState._bounds._topLeft.x = 320;
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_activeState._bounds._topLeft.y = 240;
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_activeState._bounds._bottomRight.x = MAX(0, dimensions._width - 640) + 320;
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_activeState._bounds._bottomRight.y = MAX(0, dimensions._height - 480) + 240;
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_activeState._panTargetPoint = panPoint;
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clipPanTargetPoint();
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_activeState._currPan = _activeState._panTargetPoint;
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_activeState._panXShl = _activeState._currPan.x << 16;
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_activeState._panYShl = _activeState._currPan.y << 16;
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_vm->_backgroundItems->refreshPan();
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_activeState._panToPositionPtr = 0;
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_activeState._panObjectId = 0;
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_activeState._panNotifyId = 0;
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_activeState._trackingLimits.x = 0;
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_activeState._trackingLimits.y = 0;
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_activeState._pointFlags = 0;
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_activeState._centerPt.x = 320;
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_activeState._centerPt.y = 240;
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}
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void Camera::panCenterObject(uint32 objectId, int16 panSpeed) {
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Common::Point *actorPosition = _vm->getObjectActorPositionPtr(objectId);
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_activeState._cameraMode = 1;
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_activeState._panSpeed = panSpeed;
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_activeState._trackingLimits.x = 8;
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_activeState._trackingLimits.y = 8;
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_activeState._pointFlags = 0;
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_activeState._panToPositionPtr = actorPosition;
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_activeState._panObjectId = objectId;
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_activeState._panTargetPoint = *actorPosition;
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_activeState._panNotifyId = 0;
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clipPanTargetPoint();
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_activeState._panStartTime = getCurrentTime();
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recalcPan(_activeState._panStartTime);
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}
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void Camera::panTrackObject(uint32 objectId) {
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Common::Point *actorPosition = _vm->getObjectActorPositionPtr(objectId);
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_activeState._cameraMode = 3;
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_activeState._panObjectId = objectId;
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_activeState._trackingLimits.x = 160;
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_activeState._trackingLimits.y = 120;
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_activeState._pointFlags = 0;
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_activeState._panSpeed = 710;
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_activeState._panToPositionPtr = actorPosition;
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_activeState._panNotifyId = 0;
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_activeState._panTargetPoint = *actorPosition;
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clipPanTargetPoint();
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_activeState._panStartTime = getCurrentTime();
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recalcPan(_activeState._panStartTime);
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}
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void Camera::panToPoint(Common::Point pt, int16 panSpeed, uint32 panNotifyId) {
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if (_activeState._panNotifyId) {
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// TODO scrmgrNotifyID(_activeState._panNotifyId);
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_activeState._panNotifyId = 0;
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}
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_activeState._panTargetPoint = Camera::getPtOffset(pt);
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clipPanTargetPoint();
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if (panSpeed) {
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_activeState._cameraMode = 5;
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_activeState._panSpeed = panSpeed;
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_activeState._trackingLimits.x = 0;
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_activeState._trackingLimits.y = 0;
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_activeState._pointFlags = 0;
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_activeState._panToPositionPtr = 0;
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_activeState._panNotifyId = panNotifyId;
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_activeState._panStartTime = getCurrentTime();
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recalcPan(_activeState._panStartTime);
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} else {
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_activeState._currPan = _activeState._panTargetPoint;
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// TODO stopPan();
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if (panNotifyId) {
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// TODO scrmgrNotifyID(panNotifyId);
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}
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}
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}
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void Camera::panEdgeFollow(uint32 objectId, int16 panSpeed) {
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Common::Point *actorPosition = _vm->getObjectActorPositionPtr(objectId);
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_activeState._cameraMode = 2;
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_activeState._trackingLimits.x = 318;
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_activeState._trackingLimits.y = 238;
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_activeState._pointFlags = 0;
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_activeState._panSpeed = panSpeed;
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_activeState._panToPositionPtr = actorPosition;
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_activeState._panObjectId = objectId;
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_activeState._panTargetPoint = _activeState._currPan;
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_activeState._panNotifyId = 0;
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clipPanTargetPoint();
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_activeState._panStartTime = getCurrentTime();
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recalcPan(_activeState._panStartTime);
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}
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void Camera::stopPan() {
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_activeState._cameraMode = 6;
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_activeState._panTargetPoint = _activeState._currPan;
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_activeState._panSpeed = 1;
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_activeState._panXShl = _activeState._currPan.x << 16;
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_activeState._panYShl = _activeState._currPan.y << 16;
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_activeState._panToPositionPtr = 0;
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_activeState._panObjectId = 0;
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_activeState._panNotifyId = 0;
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_activeState._pointFlags = 0;
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_vm->_backgroundItems->refreshPan();
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}
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void Camera::pause() {
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_activeState._pauseStartTime = getCurrentTime();
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_activeState._paused = true;
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}
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void Camera::unpause() {
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_activeState._paused = false;
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uint32 pauseDuration = getCurrentTime() - _activeState._pauseStartTime;
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_activeState._time28 += pauseDuration;
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_activeState._panStartTime += pauseDuration;
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}
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void Camera::pushCameraMode() {
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CameraModeStackItem item;
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item._cameraMode = _activeState._cameraMode;
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item._panSpeed = _activeState._panSpeed;
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item._panObjectId = 0;
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item._panNotifyId = 0;
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item._panTargetPoint.x = 0;
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item._panTargetPoint.y = 0;
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switch (_activeState._cameraMode) {
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case 4:
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item._cameraMode = 3;
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item._panObjectId = _activeState._panObjectId;
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break;
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case 1:
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case 2:
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case 3:
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item._panObjectId = _activeState._panObjectId;
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break;
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case 5:
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item._panTargetPoint = _activeState._panTargetPoint;
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item._panNotifyId = _activeState._panNotifyId;
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break;
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}
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_stack.push(item);
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}
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void Camera::popCameraMode() {
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CameraModeStackItem item = _stack.pop();
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if (item._panObjectId && !_vm->getObjectActorPositionPtr(item._panObjectId)) {
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// Tracking object doesn't exist any longer
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stopPan();
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return;
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}
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switch (item._cameraMode) {
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case 1:
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panCenterObject(item._panObjectId, item._panSpeed);
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break;
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case 2:
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panEdgeFollow(item._panObjectId, item._panSpeed);
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break;
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case 3:
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panTrackObject(item._panObjectId);
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break;
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case 5:
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panToPoint(item._panTargetPoint, item._panSpeed, item._panNotifyId);
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break;
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case 6:
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stopPan();
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break;
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}
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}
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void Camera::clearCameraModeStack() {
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_stack.clear();
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}
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void Camera::update(uint32 currTime) {
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if (_activeState._paused)
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return;
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switch (_activeState._cameraMode) {
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case 1:
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updateMode1(currTime);
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break;
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case 2:
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updateMode2(currTime);
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break;
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case 3:
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updateMode3(currTime);
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break;
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}
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if (_activeState._cameraMode != 6) {
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if (!isPanFinished() && updatePan(currTime)) {
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/* Unused
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if (_activeState._cameraMode == 1 || _activeState._cameraMode == 5)
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nullsub_2();
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*/
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_vm->_backgroundItems->refreshPan();
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}
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if (isPanFinished()) {
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if (_activeState._cameraMode == 5) {
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// Notify a thread that the camera panning has finished
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if (_activeState._panNotifyId) {
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// TODO scrmgrNotifyID(_activeState._panNotifyId);
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_activeState._panNotifyId = 0;
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}
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_activeState._cameraMode = 6;
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} else if (_activeState._cameraMode == 4) {
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_activeState._cameraMode = 3;
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}
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}
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}
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}
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void Camera::setBounds(Common::Point &minPt, Common::Point &maxPt) {
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_activeState._bounds._topLeft = minPt;
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_activeState._bounds._bottomRight = maxPt;
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}
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void Camera::setBoundsToDimensions(WidthHeight &dimensions) {
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// NOTE For the caller dimensions = artdispGetMasterBGDimensions();
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_activeState._bounds._topLeft.x = 320;
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_activeState._bounds._topLeft.y = 240;
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_activeState._bounds._bottomRight.x = MAX(0, dimensions._width - 640) + 320;
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_activeState._bounds._bottomRight.y = MAX(0, dimensions._height - 480) + 240;
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clipPanTargetPoint();
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}
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Common::Point Camera::getCurrentPan() {
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return _activeState._currPan;
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}
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Common::Point Camera::getScreenOffset() {
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Common::Point screenOffs = getCurrentPan();
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screenOffs.x -= 320;
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screenOffs.y -= 240;
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return screenOffs;
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}
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void Camera::updateMode1(uint32 currTime) {
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Common::Point ptOffs = getPtOffset(*_activeState._panToPositionPtr);
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int deltaX = ptOffs.x - _activeState._currPan.x + 320 - _activeState._centerPt.x;
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int deltaY = ptOffs.y - _activeState._currPan.y + 240 - _activeState._centerPt.y;
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int deltaXAbs = ABS(deltaX);
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int deltaYAbs = ABS(deltaY);
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if (deltaXAbs > _activeState._trackingLimits.x)
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_activeState._panTargetPoint.x = _activeState._currPan.x + ABS(deltaXAbs - _activeState._trackingLimits.x) * (deltaX >= 0 ? 1 : -1);
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else
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_activeState._panTargetPoint.x = _activeState._currPan.x;
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if (deltaYAbs > _activeState._trackingLimits.y)
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_activeState._panTargetPoint.y = _activeState._currPan.y + ABS(deltaYAbs - _activeState._trackingLimits.y) * (deltaY >= 0 ? 1 : -1);
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else
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_activeState._panTargetPoint.y = _activeState._currPan.y;
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clipPanTargetPoint();
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if (!isPanFinished()) {
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uint32 oldPanTime = _activeState._panStartTime;
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_activeState._panStartTime = _activeState._time28;
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recalcPan(oldPanTime);
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}
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}
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void Camera::updateMode2(uint32 currTime) {
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Common::Point panToPosition = *_activeState._panToPositionPtr;
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uint pointFlags = 0;
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WRect rect;
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rect._topLeft.x = 320 - _activeState._trackingLimits.x;
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rect._topLeft.y = 240 - _activeState._trackingLimits.y;
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rect._bottomRight.x = 320 + _activeState._trackingLimits.x;
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rect._bottomRight.y = 240 + _activeState._trackingLimits.y;
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if (calcPointFlags(panToPosition, rect, pointFlags)) {
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if (pointFlags != _activeState._pointFlags) {
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_activeState._pointFlags = pointFlags;
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if (pointFlags & 1)
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_activeState._panTargetPoint.x = _activeState._bounds._topLeft.x;
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else if (pointFlags & 2)
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_activeState._panTargetPoint.x = _activeState._bounds._bottomRight.x;
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else
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_activeState._panTargetPoint.x = _activeState._currPan.x;
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if (pointFlags & 4)
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_activeState._panTargetPoint.y = _activeState._bounds._topLeft.y;
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else if (pointFlags & 8)
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_activeState._panTargetPoint.y = _activeState._bounds._bottomRight.y;
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else
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_activeState._panTargetPoint.y = _activeState._currPan.y;
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clipPanTargetPoint();
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_activeState._panStartTime = currTime;
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recalcPan(currTime);
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}
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} else if (_activeState._pointFlags) {
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_activeState._pointFlags = 0;
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_activeState._panTargetPoint = _activeState._currPan;
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}
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}
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void Camera::updateMode3(uint32 currTime) {
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Common::Point panToPosition = *_activeState._panToPositionPtr;
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int deltaX = panToPosition.x - _activeState._currPan.x;
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int deltaY = panToPosition.y - _activeState._currPan.y;
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if (ABS(deltaX) > _activeState._trackingLimits.x)
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_activeState._panTargetPoint.x = _activeState._currPan.x + 2 * _activeState._trackingLimits.x * (deltaX >= 0 ? 1 : -1);
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else
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_activeState._panTargetPoint.x = _activeState._currPan.x;
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if (ABS(deltaY) > _activeState._trackingLimits.y)
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_activeState._panTargetPoint.y = _activeState._currPan.y + 2 * _activeState._trackingLimits.y * (deltaY >= 0 ? 1 : -1);
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else
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_activeState._panTargetPoint.y = _activeState._currPan.y;
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clipPanTargetPoint();
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if (!isPanFinished()) {
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_activeState._panStartTime = currTime;
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recalcPan(currTime);
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_activeState._cameraMode = 4;
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}
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}
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bool Camera::updatePan(uint32 currTime) {
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if (currTime - _activeState._time28 >= _activeState._time2E) {
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_activeState._panXShl = _activeState._panTargetPoint.x << 16;
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_activeState._panYShl = _activeState._panTargetPoint.y << 16;
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} else {
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_activeState._panXShl += fixedMul(_activeState._someX, (currTime - _activeState._panStartTime) << 16);
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_activeState._panYShl += fixedMul(_activeState._someY, (currTime - _activeState._panStartTime) << 16);
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}
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_activeState._panStartTime = currTime;
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Common::Point newPan(_activeState._panXShl >> 16, _activeState._panYShl >> 16);
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if (_activeState._currPan.x != newPan.x || _activeState._currPan.y != newPan.y) {
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_activeState._currPan = newPan;
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return true;
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}
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return false;
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}
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bool Camera::isPanFinished() {
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return _activeState._currPan.x == _activeState._panTargetPoint.x && _activeState._currPan.y == _activeState._panTargetPoint.y;
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}
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Common::Point Camera::getPtOffset(Common::Point pt) {
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pt.x = pt.x - _activeState._centerPt.x + 320;
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pt.y = pt.y - _activeState._centerPt.y + 240;
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return pt;
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}
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void Camera::recalcPan(uint32 currTime) {
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_activeState._currPan2 = getCurrentPan();
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_activeState._time28 = currTime;
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if (_activeState._panSpeed == 0) {
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_activeState._time2E = 0;
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} else {
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FP16 x1 = _activeState._currPan2.x << 16;
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FP16 y1 = _activeState._currPan2.y << 16;
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FP16 x2 = _activeState._panTargetPoint.x << 16;
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FP16 y2 = _activeState._panTargetPoint.y << 16;
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FP16 distance = fixedDistance(x1, y1, x2, y2);
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_activeState._time2E = 60 * fixedTrunc(distance) / _activeState._panSpeed;
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}
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if (_activeState._time2E != 0) {
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_activeState._someX = fixedDiv((_activeState._panTargetPoint.x - _activeState._currPan2.x) << 16, _activeState._time2E << 16);
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_activeState._someY = fixedDiv((_activeState._panTargetPoint.y - _activeState._currPan2.y) << 16, _activeState._time2E << 16);
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} else {
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_activeState._someX = (_activeState._panTargetPoint.x - _activeState._currPan2.x) << 16;
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_activeState._someY = (_activeState._panTargetPoint.y - _activeState._currPan2.y) << 16;
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}
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}
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bool Camera::calcPointFlags(Common::Point &pt, WRect &rect, uint &outFlags) {
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bool result = false;
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if (pt.x < rect._topLeft.x) {
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outFlags |= 1;
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result = true;
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} else if (pt.x > rect._bottomRight.x) {
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outFlags |= 2;
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result = true;
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}
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if (pt.y < rect._topLeft.y) {
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outFlags |= 4;
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result = true;
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} else if (pt.y > rect._bottomRight.y) {
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outFlags |= 8;
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result = true;
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}
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return result;
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}
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void Camera::clipPanTargetPoint() {
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_activeState._panTargetPoint.x = CLIP(_activeState._panTargetPoint.x,
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_activeState._bounds._topLeft.x, _activeState._bounds._bottomRight.x);
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_activeState._panTargetPoint.y = CLIP(_activeState._panTargetPoint.y,
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_activeState._bounds._topLeft.y, _activeState._bounds._bottomRight.y);
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}
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} // End of namespace Illusions
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