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Expose point data from Contours

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Add in a Point method to the Contours class to access the underlying
point coordinates from the JavaScript side.
This commit is contained in:
Michael Smith 2013-02-10 14:58:06 -08:00
parent e64b558bbd
commit a197586673
2 changed files with 19 additions and 0 deletions
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18
src/Contours.cc
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@ -23,6 +23,7 @@ Contour::Init(Handle<Object> target) {
//Local<ObjectTemplate> proto = constructor->PrototypeTemplate();
NODE_SET_PROTOTYPE_METHOD(constructor, "point", Point);
NODE_SET_PROTOTYPE_METHOD(constructor, "size", Size);
NODE_SET_PROTOTYPE_METHOD(constructor, "cornerCount", CornerCount);
NODE_SET_PROTOTYPE_METHOD(constructor, "area", Area);
@ -53,6 +54,23 @@ Contour::Contour(): ObjectWrap() {
}
Handle<Value>
Contour::Point(const Arguments &args) {
HandleScope scope;
Contour *self = ObjectWap::Unwrap<Contour>(args.This());
int pos = args[0]->NumberValue();
int index = args[1]->NumberValue();
cv::Point point = self->contours[pos][index];
Local<Object> data = Object::New();
data->Set(String::NewSymbol("x"), Number::New(point.x));
data->Set(String::NewSymbol("y"), Number::New(point.y));
return scope.Close(data);
}
// FIXME: this sould better be called "Length" as ``Contours`` is an Array like structure
// also, this would allow to use ``Size`` for the function returning the number of corners
// in the contour for better consistency with OpenCV.

1
src/Contours.h
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@ -14,6 +14,7 @@ class Contour: public node::ObjectWrap {
Contour();
//JSFUNC(Size)
static Handle<Value> Point(const v8::Arguments&);
static Handle<Value> Size(const v8::Arguments&);
static Handle<Value> CornerCount(const v8::Arguments&);
static Handle<Value> Area(const v8::Arguments&);