only update portion of screen that has changed on entering orbit.

This is about the smoothest I know how to make it.


git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@868 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/ChangeLog

@@ -1,4 +1,5 @@
 Changes towards version 0.3:
+- Decelerate when entering orbit to give a smoother effect -PhracturedBlue
 - fix subtitle text overlap issues (bug 232)
 - 'Esc' now leaves planet surface (bug233) -PhracturedBlue
 - Fix race on exiting starbase (bug 230) -PracturedBlue

sc2/src/sc2code/planets/pl_stuff.c

@@ -54,7 +54,6 @@ PlanetZoomOrbit (int x, COUNT zoom_amt, UBYTE zoom_from)
 {
 	FRAME pFrame[2];
 	COUNT i, num_frames;
-	COUNT scale_amt;
 
 	num_frames = (pSolarSysState->ShieldFrame == 0) ? 1 : 2;
 	pFrame[0] = SetAbsFrameIndex (pSolarSysState->PlanetFrameArray, (COUNT)(x + 1));
@@ -84,13 +83,13 @@ PlanetZoomOrbit (int x, COUNT zoom_amt, UBYTE zoom_from)
 	}
 }
 
-int
+PRECT
-RotatePlanet (int x, int dx, int dy, COUNT scale_amt, UBYTE zoom_from)
+RotatePlanet (int x, int dx, int dy, COUNT scale_amt, UBYTE zoom_from, PRECT zoomr)
 {
 	STAMP s;
 	FRAME pFrame[2];
 	COUNT i, num_frames;
-	RECT r,  *rp = NULL;
+	RECT *rp = NULL;
 	CONTEXT OldContext;
 
 	num_frames = (pSolarSysState->ShieldFrame == 0) ? 1 : 2;
@@ -99,11 +98,8 @@ RotatePlanet (int x, int dx, int dy, COUNT scale_amt, UBYTE zoom_from)
 		pFrame[1] = pSolarSysState->ShieldFrame;
 	if (scale_amt)
 	{	
-		r.corner.x = 0;
+		if(zoomr->extent.width)
-		r.corner.y = 0;
+			rp = zoomr;
-		r.extent.width = SIS_SCREEN_WIDTH;
-		r.extent.height = SIS_SCREEN_HEIGHT - MAP_HEIGHT;
-		rp = &r;
 		//  we're zooming in, take care of scaling the frames
 		for (i=0; i < num_frames; i++)
 			pFrame[i] = pSolarSysState->ScaleFrame[i];
@@ -140,8 +136,13 @@ RotatePlanet (int x, int dx, int dy, COUNT scale_amt, UBYTE zoom_from)
 	}
 	//ClearSemaphore (GraphicsSem);
 	if (scale_amt && scale_amt != MAP_HEIGHT)
-		return 1;
+	{
-	return 0;
+		GetFrameRect (pFrame[num_frames - 1], zoomr);
+		zoomr->corner.x += dx;
+		zoomr->corner.y += dy;
+		return zoomr;
+	}
+	return NULL;
 }
 
 void

sc2/src/sc2code/planets/plangen.c

@@ -40,7 +40,7 @@ void SetPlanetTilt (int da);
 
 void RepairBackRect (PRECT pRect);
 
-int RotatePlanet (int x, int dx, int dy, COUNT scale_amt, UBYTE zoom_from);
+PRECT RotatePlanet (int x, int dx, int dy, COUNT scale_amt, UBYTE zoom_from, PRECT r);
 
 DWORD frame_mapRGBA (FRAME FramePtr,UBYTE r, UBYTE g,  UBYTE b, UBYTE a);
 
@@ -1368,7 +1368,8 @@ rotate_planet_task (void *data)
 	COORD init_x;
 	DWORD TimeIn;
 	PSOLARSYS_STATE pSS;
-	BOOLEAN repair, zooming;
+	BOOLEAN zooming;
+	RECT r, *repair = &r;
 	UBYTE zoom_from;
 	COUNT zoom_arr[50];
 	COUNT zoom_amt, frame_num = 0, zoom_frames;
@@ -1376,7 +1377,7 @@ rotate_planet_task (void *data)
 
 	Task task = (Task) data;
 
-	repair = FALSE;
+	r.extent.width = 0;
 	zooming = TRUE;
 
 	pSS = pSolarSysState;
@@ -1425,7 +1426,7 @@ rotate_planet_task (void *data)
 					pSS->PauseRotate = 1;
 
 				repair = RotatePlanet (x, SIS_SCREEN_WIDTH >> 1,
-						(148 - SIS_ORG_Y) >> 1, zoom_amt, zoom_from
+						(148 - SIS_ORG_Y) >> 1, zoom_amt, zoom_from, repair
 						);
 
 				if (!repair && zooming)