Mercurial > sdl-ios-xcode
diff src/events/SDL_gesture.c @ 4685:e0c3b09368a6
Fixed Dollar Recognition.
author | Jim Grandpre <jim.tla@gmail.com> |
---|---|
date | Sat, 07 Aug 2010 11:32:11 -0400 |
parents | f47c2640c667 |
children | 463cd74304b9 |
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--- a/src/events/SDL_gesture.c Fri Aug 06 01:55:38 2010 -0400 +++ b/src/events/SDL_gesture.c Sat Aug 07 11:32:11 2010 -0400 @@ -90,6 +90,15 @@ int numGestureTouches = 0; SDL_bool recordAll; +void SDL_PrintPath(Point *path) { + int i; + printf("Path:"); + for(i=0;i<DOLLARNPOINTS;i++) { + printf(" (%f,%f)",path[i].x,path[i].y); + } + printf("\n"); +} + int SDL_RecordGesture(SDL_TouchID touchId) { int i; if(touchId < 0) recordAll = SDL_TRUE; @@ -283,6 +292,7 @@ int dollarNormalize(DollarPath path,Point *points) { int i; //Calculate length if it hasn't already been done + printf("length: %f\n",path.length); if(path.length <= 0) { for(i=1;i<path.numPoints;i++) { float dx = path.p[i ].x - @@ -292,14 +302,16 @@ path.length += sqrt(dx*dx+dy*dy); } } - + printf("New length: %f\n",path.length); //Resample float interval = path.length/(DOLLARNPOINTS - 1); - float dist = 0; + float dist = interval; int numPoints = 0; - Point centroid; centroid.x = 0;centroid.y = 0; + Point centroid; + centroid.x = 0;centroid.y = 0; + //printf("(%f,%f)\n",path.p[path.numPoints-1].x,path.p[path.numPoints-1].y); for(i = 1;i < path.numPoints;i++) { float d = sqrt((path.p[i-1].x-path.p[i].x)*(path.p[i-1].x-path.p[i].x)+ @@ -318,7 +330,14 @@ } dist += d; } - if(numPoints < 1) return 0; + if(numPoints < DOLLARNPOINTS-1) { + printf("ERROR: NumPoints = %i\n",numPoints); + return 0; + } + //copy the last point + points[DOLLARNPOINTS-1] = path.p[path.numPoints-1]; + numPoints = DOLLARNPOINTS; + centroid.x /= numPoints; centroid.y /= numPoints; @@ -363,6 +382,7 @@ Point points[DOLLARNPOINTS]; int numPoints = dollarNormalize(path,points); + SDL_PrintPath(points); int i; int bestDiff = 10000; @@ -467,6 +487,7 @@ inTouch->recording = SDL_FALSE; Point path[DOLLARNPOINTS]; dollarNormalize(inTouch->dollarPath,path); + SDL_PrintPath(path); int index; if(recordAll) { index = SDL_AddDollarGesture(NULL,path); @@ -515,7 +536,11 @@ if(path->numPoints < MAXPATHSIZE) { path->p[path->numPoints].x = inTouch->centroid.x; path->p[path->numPoints].y = inTouch->centroid.y; - path->length += sqrt(dx*dx + dy*dy); + float pathDx = + (path->p[path->numPoints].x-path->p[path->numPoints-1].x); + float pathDy = + (path->p[path->numPoints].y-path->p[path->numPoints-1].y); + path->length += sqrt(pathDx*pathDx + pathDy*pathDy); path->numPoints++; } #endif @@ -526,7 +551,8 @@ lastCentroid = inTouch->centroid; inTouch->centroid.x += dx/inTouch->numDownFingers; - inTouch->centroid.y += dy/inTouch->numDownFingers; + inTouch->centroid.y += dy/inTouch->numDownFingers; + //printf("Centrid : (%f,%f)\n",inTouch->centroid.x,inTouch->centroid.y); if(inTouch->numDownFingers > 1) { Point lv; //Vector from centroid to last x,y position Point v; //Vector from centroid to current x,y position