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Started trying to build gesture code for iPhone
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@slouken
slouken committed Jul 15, 2010
1 parent 1f798a9 commit d703c5c
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24 changes: 24 additions & 0 deletions Xcode-iPhoneOS/SDL/SDLiPhoneOS.xcodeproj/project.pbxproj
View file
Expand Up @@ -95,6 +95,12 @@
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04BA9D6611EF474A00B60E01 /* SDL_touch.c in Sources */ = {isa = PBXBuildFile; fileRef = 04BA9D6211EF474A00B60E01 /* SDL_touch.c */; };
04BA9D7D11EF497E00B60E01 /* SDL_gesture.h in Headers */ = {isa = PBXBuildFile; fileRef = 04BA9D7B11EF497E00B60E01 /* SDL_gesture.h */; };
04BA9D7E11EF497E00B60E01 /* SDL_touch.h in Headers */ = {isa = PBXBuildFile; fileRef = 04BA9D7C11EF497E00B60E01 /* SDL_touch.h */; };
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Expand Down Expand Up @@ -346,6 +352,12 @@
04B2ECE81025CE4800F9BC5F /* SDL_revision.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SDL_revision.h; path = ../../include/SDL_revision.h; sourceTree = SOURCE_ROOT; };
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04BA9D7B11EF497E00B60E01 /* SDL_gesture.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SDL_gesture.h; path = ../../include/SDL_gesture.h; sourceTree = SOURCE_ROOT; };
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Expand Down Expand Up @@ -851,6 +863,7 @@
FD99B8F60DD52EB400FB1D6B /* SDL_endian.h */,
FD99B8DC0DD52EB400FB1D6B /* SDL_error.h */,
FD99B8DD0DD52EB400FB1D6B /* SDL_events.h */,
04BA9D7B11EF497E00B60E01 /* SDL_gesture.h */,
04461DED0EA76BA3006C462D /* SDL_haptic.h */,
044E5FB411E6069F0076F181 /* SDL_input.h */,
FD99B8DE0DD52EB400FB1D6B /* SDL_joystick.h */,
Expand All @@ -876,6 +889,7 @@
FD99B8EF0DD52EB400FB1D6B /* SDL_syswm.h */,
FD99B8F00DD52EB400FB1D6B /* SDL_thread.h */,
FD99B8F10DD52EB400FB1D6B /* SDL_timer.h */,
04BA9D7C11EF497E00B60E01 /* SDL_touch.h */,
FD99B8F20DD52EB400FB1D6B /* SDL_types.h */,
FD99B8F30DD52EB400FB1D6B /* SDL_version.h */,
FD99B8F40DD52EB400FB1D6B /* SDL_video.h */,
Expand Down Expand Up @@ -956,6 +970,10 @@
FD99B98C0DD52EDC00FB1D6B /* events */ = {
isa = PBXGroup;
children = (
04BA9D5F11EF474A00B60E01 /* SDL_gesture_c.h */,
04BA9D6011EF474A00B60E01 /* SDL_gesture.c */,
04BA9D6111EF474A00B60E01 /* SDL_touch_c.h */,
04BA9D6211EF474A00B60E01 /* SDL_touch.c */,
FD99B98D0DD52EDC00FB1D6B /* blank_cursor.h */,
FD99B98E0DD52EDC00FB1D6B /* default_cursor.h */,
FD99B98F0DD52EDC00FB1D6B /* scancodes_darwin.h */,
Expand Down Expand Up @@ -1191,6 +1209,10 @@
044E5FB511E6069F0076F181 /* SDL_clipboard.h in Headers */,
044E5FB611E6069F0076F181 /* SDL_input.h in Headers */,
0420497011E6F03D007E7EC9 /* SDL_clipboardevents_c.h in Headers */,
04BA9D6311EF474A00B60E01 /* SDL_gesture_c.h in Headers */,
04BA9D6511EF474A00B60E01 /* SDL_touch_c.h in Headers */,
04BA9D7D11EF497E00B60E01 /* SDL_gesture.h in Headers */,
04BA9D7E11EF497E00B60E01 /* SDL_touch.h in Headers */,
);
runOnlyForDeploymentPostprocessing = 0;
};
Expand Down Expand Up @@ -1431,6 +1453,8 @@
006E9889119552DD001DE610 /* SDL_rwopsbundlesupport.m in Sources */,
044E5FB811E606EB0076F181 /* SDL_clipboard.c in Sources */,
0420497111E6F03D007E7EC9 /* SDL_clipboardevents.c in Sources */,
04BA9D6411EF474A00B60E01 /* SDL_gesture.c in Sources */,
04BA9D6611EF474A00B60E01 /* SDL_touch.c in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;
};
Expand Down
94 changes: 47 additions & 47 deletions src/events/SDL_gesture.c
View file
Expand Up @@ -110,13 +110,14 @@ unsigned long SDL_HashDollar(Point* points) {
return hash;
}

int SaveTemplate(DollarTemplate *templ, FILE *fp) {
static int SaveTemplate(DollarTemplate *templ, FILE *fp) {
int i;
fprintf(fp,"%lu ",templ->hash);
for(i = 0;i < DOLLARNPOINTS;i++) {
fprintf(fp,"%i %i ",(int)templ->path[i].x,(int)templ->path[i].y);
}
fprintf(fp,"\n");
return 0;
}


Expand All @@ -141,6 +142,36 @@ int SDL_SaveDollarTemplate(unsigned long gestureId, FILE *fp) {
}
}
}
SDL_SetError("Unknown gestureId");
return -1;
}

//path is an already sampled set of points
//Returns the index of the gesture on success, or -1
static int SDL_AddDollarGesture(GestureTouch* inTouch,Point* path) {
if(inTouch == NULL) {
if(numGestureTouches == 0) return -1;
int i = 0;
for(i = 0;i < numGestureTouches; i++) {
inTouch = &gestureTouch[i];
if(inTouch->numDollarTemplates < MAXTEMPLATES) {
DollarTemplate *templ =
&inTouch->dollarTemplate[inTouch->numDollarTemplates];
memcpy(templ->path,path,DOLLARNPOINTS*sizeof(Point));
templ->hash = SDL_HashDollar(templ->path);
inTouch->numDollarTemplates++;
}
}
return inTouch->numDollarTemplates - 1;
}else if(inTouch->numDollarTemplates < MAXTEMPLATES) {
DollarTemplate *templ =
&inTouch->dollarTemplate[inTouch->numDollarTemplates];
memcpy(templ->path,path,DOLLARNPOINTS*sizeof(Point));
templ->hash = SDL_HashDollar(templ->path);
inTouch->numDollarTemplates++;
return inTouch->numDollarTemplates - 1;
}
return -1;
}

int SDL_LoadDollarTemplates(int touchId, FILE *fp) {
Expand Down Expand Up @@ -182,37 +213,6 @@ int SDL_LoadDollarTemplates(int touchId, FILE *fp) {
}


//path is an already sampled set of points
//Returns the index of the gesture on success, or -1
int SDL_AddDollarGesture(GestureTouch* inTouch,Point* path) {
if(inTouch == NULL) {
if(numGestureTouches == 0) return -1;
int i = 0;
for(i = 0;i < numGestureTouches; i++) {
inTouch = &gestureTouch[i];
if(inTouch->numDollarTemplates < MAXTEMPLATES) {
DollarTemplate *templ =
&inTouch->dollarTemplate[inTouch->numDollarTemplates];
memcpy(templ->path,path,DOLLARNPOINTS*sizeof(Point));
templ->hash = SDL_HashDollar(templ->path);
inTouch->numDollarTemplates++;
}
}
return inTouch->numDollarTemplates - 1;
}else if(inTouch->numDollarTemplates < MAXTEMPLATES) {
DollarTemplate *templ =
&inTouch->dollarTemplate[inTouch->numDollarTemplates];
memcpy(templ->path,path,DOLLARNPOINTS*sizeof(Point));
templ->hash = SDL_HashDollar(templ->path);
inTouch->numDollarTemplates++;
return inTouch->numDollarTemplates - 1;
}
return -1;
}




float dollarDifference(Point* points,Point* templ,float ang) {
// Point p[DOLLARNPOINTS];
float dist = 0;
Expand Down Expand Up @@ -264,21 +264,6 @@ float bestDollarDifference(Point* points,Point* templ) {
return SDL_min(f1,f2);
}

float dollarRecognize(DollarPath path,int *bestTempl,GestureTouch* touch) {

Point points[DOLLARNPOINTS];
int numPoints = dollarNormalize(path,points);
int i;

int bestDiff = 10000;
*bestTempl = -1;
for(i = 0;i < touch->numDollarTemplates;i++) {
int diff = bestDollarDifference(points,touch->dollarTemplate[i].path);
if(diff < bestDiff) {bestDiff = diff; *bestTempl = i;}
}
return bestDiff;
}

//DollarPath contains raw points, plus (possibly) the calculated length
int dollarNormalize(DollarPath path,Point *points) {
int i;
Expand Down Expand Up @@ -359,6 +344,21 @@ int dollarNormalize(DollarPath path,Point *points) {
return numPoints;
}

float dollarRecognize(DollarPath path,int *bestTempl,GestureTouch* touch) {

Point points[DOLLARNPOINTS];
int numPoints = dollarNormalize(path,points);
int i;

int bestDiff = 10000;
*bestTempl = -1;
for(i = 0;i < touch->numDollarTemplates;i++) {
int diff = bestDollarDifference(points,touch->dollarTemplate[i].path);
if(diff < bestDiff) {bestDiff = diff; *bestTempl = i;}
}
return bestDiff;
}

int SDL_GestureAddTouch(SDL_Touch* touch) {
if(numGestureTouches >= MAXTOUCHES) return -1;

Expand Down

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