moved camera stuff to own file

svn-id: r8099

1 files changed, 373 insertions, 0 deletions

diff --git a/scumm/camera.cpp b/scumm/camera.cpp
new file mode 100644
index 0000000000..5e21944ef1
--- /dev/null
+++ b/scumm/camera.cpp
@@ -0,0 +1,373 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001  Ludvig Strigeus
+ * Copyright (C) 2001-2003 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#include "stdafx.h"
+#include "scumm.h"
+#include "intern.h"
+#include "actor.h"
+#include "charset.h"
+
+void Scumm::setCameraAtEx(int at) {
+	if (!(_features & GF_AFTER_V7)) {
+		camera._mode = CM_NORMAL;
+		camera._cur.x = at;
+		setCameraAt(at, 0);
+		camera._movingToActor = false;
+	}
+}
+
+void Scumm::setCameraAt(int pos_x, int pos_y) {
+	if (camera._mode != CM_FOLLOW_ACTOR || 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)) {
+		if (_features & GF_AFTER_V2)
+			VAR(VAR_CAMERA_POS_X) = camera._cur.x / 8;
+		else
+			VAR(VAR_CAMERA_POS_X) = camera._cur.x;
+		runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0);
+	}
+
+	if (camera._cur.x != camera._last.x && _charset->_hasMask)
+		stopTalk();
+}
+
+void Scumm_v7::setCameraAt(int pos_x, int pos_y) {
+	ScummVM::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)
+			&& 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);
+	}
+}
+
+void Scumm::setCameraFollows(Actor *a) {
+
+	int t, i;
+
+	camera._mode = CM_FOLLOW_ACTOR;
+	camera._follows = a->number;
+
+	if (!a->isInCurrentRoom()) {
+		startScene(a->getRoom(), 0, 0);
+		camera._mode = CM_FOLLOW_ACTOR;
+		camera._cur.x = a->x;
+		setCameraAt(camera._cur.x, 0);
+	}
+
+	t = (a->x >> 3);
+
+	if (t - _screenStartStrip < camera._leftTrigger || t - _screenStartStrip > camera._rightTrigger)
+		setCameraAt(a->x, 0);
+
+	for (i = 1; i < _numActors; i++) {
+		if (_actors[i].isInCurrentRoom())
+			_actors[i].needRedraw = true;
+	}
+	runHook(0);
+}
+
+void Scumm_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->x - camera._cur.x);
+	ay = abs(a->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->x, a->y);
+	}
+
+	if (a->number != oldfollow)
+		runHook(0);
+}
+
+
+void Scumm::clampCameraPos(ScummVM::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 Scumm::moveCamera() {
+	if (_features & GF_AFTER_V7) {
+		ScummVM::Point old = camera._cur;
+		Actor *a = NULL;
+
+		if (camera._follows) {
+			a = derefActor(camera._follows, "moveCamera");
+			if (abs(camera._cur.x - a->x) > VAR(VAR_CAMERA_THRESHOLD_X) ||
+					abs(camera._cur.y - a->y) > VAR(VAR_CAMERA_THRESHOLD_Y)) {
+				camera._movingToActor = true;
+				if (VAR(VAR_CAMERA_THRESHOLD_X) == 0)
+					camera._cur.x = a->x;
+				if (VAR(VAR_CAMERA_THRESHOLD_Y) == 0)
+					camera._cur.y = a->y;
+				clampCameraPos(&camera._cur);
+			}
+		} else {
+			camera._movingToActor = false;
+		}
+
+		if (camera._movingToActor) {
+			VAR(VAR_CAMERA_DEST_X) = camera._dest.x = a->x;
+			VAR(VAR_CAMERA_DEST_Y) = camera._dest.y = a->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);
+		}
+	} else {
+		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 == CM_FOLLOW_ACTOR) {
+			a = derefActor(camera._follows, "moveCamera");
+
+			actorx = a->x;
+			t = (actorx >> 3) - _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->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 >> 3) == (a->x >> 3)) {
+			camera._movingToActor = false;
+		}
+
+		cameraMoved();
+	
+		if (VAR_SCROLL_SCRIPT != 0xFF && VAR(VAR_SCROLL_SCRIPT) && pos != camera._cur.x) {
+			if (_features & GF_AFTER_V2)
+				VAR(VAR_CAMERA_POS_X) = camera._cur.x / 8;
+			else
+				VAR(VAR_CAMERA_POS_X) = camera._cur.x;
+			runScript(VAR(VAR_SCROLL_SCRIPT), 0, 0, 0);
+		}
+	}
+}
+
+void Scumm::cameraMoved() {
+	if (_features & GF_AFTER_V7) {
+		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 - (_screenWidth / 2)) >> 3;
+	_screenEndStrip = _screenStartStrip + gdi._numStrips - 1;
+
+	_screenTop = camera._cur.y - (_screenHeight / 2);
+	if (_features & GF_AFTER_V7) {
+
+		_screenLeft = camera._cur.x - (_screenWidth / 2);
+	} else {
+
+		_screenLeft = _screenStartStrip << 3;
+	}
+
+#ifdef V7_SMOOTH_SCROLLING_HACK
+	virtscr[0].xstart = _screenLeft;
+#else
+	virtscr[0].xstart = _screenStartStrip << 3;
+#endif
+}
+
+void Scumm::panCameraTo(int x, int y) {
+	camera._dest.x = x;
+	camera._mode = CM_PANNING;
+	camera._movingToActor = false;
+}
+
+void Scumm_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;
+}
+
+void Scumm::actorFollowCamera(int act) {
+	if (!(_features & GF_AFTER_V7)) {
+		int old;
+
+		/* mi1 compatibilty */
+		if (act == 0) {
+			camera._mode = CM_NORMAL;
+			camera._follows = 0;
+			camera._movingToActor = false;
+			return;
+		}
+
+		old = camera._follows;
+		setCameraFollows(derefActor(act, "actorFollowCamera"));
+		if (camera._follows != old)
+			runHook(0);
+
+		camera._movingToActor = false;
+	}
+}
+