Class: OpenCV::CvSeq
- Inherits:
-
Object
- Object
- OpenCV::CvSeq
- Includes:
- Enumerable
- Defined in:
- ext/opencv/cvseq.cpp,
ext/opencv/cvseq.cpp
Overview
Generic Sequence class. CvSeq has the method like Array (push, pop, select, etc…). But, CvSeq cannot store the object of a different class. When storing object in CvSeq, conversion is automatically tried, and the object occurs the error if it cannot be done.
e.g.
seq = CvSeq.new(CvPoint) # Argument mean "this sequence contain only this class's object"
seq.push(CvPoint.new(0, 0)) # => it's ok
seq.push("hello") # => try convert "hello" to CvPoint. but can't do it. raise error.
If the sequecne contain object of class A. When storing object(named “obj”) of class B to the sequence.
Try automatically : A.from_B(obj) => object of class A.
The sequence might have another sequence outside. see below. Each sequece has h_prev, h_next, v_prev, v_next method. If the adjoining sequence exists, each method return the adjoining sequence. Otherwise return nil.
Instance Method Summary collapse
-
#[](index) ⇒ Object
Return sequence-block at index.
-
#clear ⇒ self
Clears sequence.
-
#each {|obj| ... } ⇒ self
Calls block once for each sequence-block in self, passing that sequence-block as a parameter.
-
#each_index {|index| ... } ⇒ self
Same as CvSeq#each, but passes the index of the element instead of the element itself.
-
#empty? ⇒ Boolean
Return
true
if contain no object, otherwize returnfalse
. -
#first ⇒ Object?
Return first sequence-block.
-
#h_next ⇒ nil
Return the sequence horizontally located in next.
-
#h_prev ⇒ nil
Return the sequence horizontally located in previous.
-
#new(type[,storage]) ⇒ Object
constructor
Return a new CvSeq.
-
#insert(index, obj) ⇒ self
Inserts the given values before element with the given index (which may be negative).
-
#last ⇒ Object?
Return last sequence-block.
-
#pop ⇒ Object?
Remove the last sequence-block from self and return it, or
nil
if the sequence is empty. -
#push(obj, ...) ⇒ self
(also: #<<)
Append - Pushes the given object(s) on the end of this sequence.
-
#remove(index) ⇒ Object?
(also: #delete_at)
Deletes the elements at the specified index.
-
#shift ⇒ Object?
(also: #pop_front)
Returns the first element of self and removes it (shifting all other elements down by one).
-
#total ⇒ Integer
(also: #length, #size)
Return total number of sequence-block.
-
#unshift ⇒ self
(also: #push_front)
Prepends objects to the front of sequence.
-
#v_next ⇒ nil
Return the sequence vertically located in next.
-
#v_prev ⇒ nil
Return the sequence vertically located in previous.
Constructor Details
#new(type[,storage]) ⇒ Object
Return a new CvSeq. type should be following classes.
-
CvIndex
-
CvPoint
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# File 'ext/opencv/cvseq.cpp', line 92
VALUE
rb_initialize(int argc, VALUE *argv, VALUE self)
{
VALUE klass, storage_value;
rb_scan_args(argc, argv, "11", &klass, &storage_value);
if (!rb_obj_is_kind_of(klass, rb_cClass))
raise_typeerror(klass, rb_cClass);
int type = 0, size = 0;
if (klass == rb_cFixnum) {
type = CV_SEQ_ELTYPE_INDEX;
size = sizeof(int);
}
else if (klass == cCvPoint::rb_class()) {
type = CV_SEQ_ELTYPE_POINT;
size = sizeof(CvPoint);
}
else if (klass == cCvPoint2D32f::rb_class()) {
type = CV_SEQ_ELTYPE_POINT;
size = sizeof(CvPoint2D32f);
}
else if (klass == cCvPoint3D32f::rb_class()) {
type = CV_SEQ_ELTYPE_POINT3D;
size = sizeof(CvPoint3D32f);
}
else
rb_raise(rb_eArgError, "unsupport %s class for sequence-block.", rb_class2name(klass));
CvSeq* seq = NULL;
if (NIL_P(storage_value)) {
storage_value = cCvMemStorage::new_object(0);
}
else {
storage_value = CHECK_CVMEMSTORAGE(storage_value);
}
try {
seq = cvCreateSeq(type, sizeof(CvSeq), size, CVMEMSTORAGE(storage_value));
}
catch (cv::Exception& e) {
raise_cverror(e);
}
DATA_PTR(self) = seq;
register_elem_class(seq, klass);
register_root_object(seq, storage_value);
return self;
}
|
Instance Method Details
#[](index) ⇒ Object
Return sequence-block at index.
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# File 'ext/opencv/cvseq.cpp', line 172
VALUE
rb_aref(VALUE self, VALUE index)
{
CvSeq *seq = CVSEQ(self);
int idx = NUM2INT(index);
if (seq->total == 0)
return Qnil;
if (idx >= seq->total)
rb_raise(rb_eIndexError, "index %d out of sequence", idx);
VALUE result = Qnil;
try {
if (seqblock_class(seq) == rb_cFixnum)
result = INT2NUM(*CV_GET_SEQ_ELEM(int, seq, idx));
else
result = REFER_OBJECT(seqblock_class(seq), cvGetSeqElem(seq, idx), self);
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return result;
}
|
#clear ⇒ self
Clears sequence. Removes all elements from the sequence.
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# File 'ext/opencv/cvseq.cpp', line 388
VALUE
rb_clear(VALUE self)
{
try {
cvClearSeq(CVSEQ(self));
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return self;
}
|
#each {|obj| ... } ⇒ self
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# File 'ext/opencv/cvseq.cpp', line 463
VALUE
rb_each(VALUE self)
{
CvSeq *seq = CVSEQ(self);
if (seq->total > 0) {
VALUE klass = seqblock_class(seq);
try {
if (klass == rb_cFixnum)
for (int i = 0; i < seq->total; ++i)
rb_yield(INT2NUM(*CV_GET_SEQ_ELEM(int, seq, i)));
else
for (int i = 0; i < seq->total; ++i)
rb_yield(REFER_OBJECT(klass, cvGetSeqElem(seq, i), self));
}
catch (cv::Exception& e) {
raise_cverror(e);
}
}
return self;
}
|
#each_index {|index| ... } ⇒ self
Same as CvSeq#each, but passes the index of the element instead of the element itself.
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# File 'ext/opencv/cvseq.cpp', line 490
VALUE
rb_each_index(VALUE self)
{
CvSeq *seq = CVSEQ(self);
for(int i = 0; i < seq->total; ++i)
rb_yield(INT2NUM(i));
return self;
}
|
#empty? ⇒ Boolean
Return true
if contain no object, otherwize return false
.
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# File 'ext/opencv/cvseq.cpp', line 160
VALUE
rb_empty_q(VALUE self)
{
return CVSEQ(self)->total == 0 ? Qtrue : Qfalse;
}
|
#first ⇒ Object?
Return first sequence-block.
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# File 'ext/opencv/cvseq.cpp', line 201
VALUE
rb_first(VALUE self)
{
return rb_aref(self, INT2FIX(0));
}
|
#h_next ⇒ nil
Return the sequence horizontally located in next. Return nil
if not existing.
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# File 'ext/opencv/cvseq.cpp', line 243
VALUE
rb_h_next(VALUE self)
{
CvSeq *seq = CVSEQ(self);
if (seq->h_next)
return new_sequence(CLASS_OF(self), seq->h_next, seqblock_class(seq), lookup_root_object(seq));
else
return Qnil;
}
|
#h_prev ⇒ nil
Return the sequence horizontally located in previous. Return nil
if not existing.
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# File 'ext/opencv/cvseq.cpp', line 226
VALUE
rb_h_prev(VALUE self)
{
CvSeq *seq = CVSEQ(self);
if (seq->h_prev)
return new_sequence(CLASS_OF(self), seq->h_prev, seqblock_class(seq), lookup_root_object(seq));
else
return Qnil;
}
|
#insert(index, obj) ⇒ self
Inserts the given values before element with the given index (which may be negative).
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# File 'ext/opencv/cvseq.cpp', line 506
VALUE
rb_insert(VALUE self, VALUE index, VALUE object)
{
Check_Type(index, T_FIXNUM);
CvSeq *seq = CVSEQ(self);
VALUE klass = seqblock_class(seq);
if (CLASS_OF(object) != klass)
rb_raise(rb_eTypeError, "arguments should be %s.", rb_class2name(klass));
try {
if (klass == rb_cFixnum) {
int n = NUM2INT(object);
cvSeqInsert(seq, NUM2INT(index), &n);
}
else
cvSeqInsert(seq, NUM2INT(index), DATA_PTR(object));
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return self;
}
|
#last ⇒ Object?
Return last sequence-block.
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# File 'ext/opencv/cvseq.cpp', line 213
VALUE
rb_last(VALUE self)
{
return rb_aref(self, INT2FIX(-1));
}
|
#pop ⇒ Object?
Remove the last sequence-block from self and return it, or nil
if the sequence is empty.
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# File 'ext/opencv/cvseq.cpp', line 356
VALUE
rb_pop(VALUE self)
{
CvSeq *seq = CVSEQ(self);
if (seq->total == 0)
return Qnil;
VALUE object = Qnil;
VALUE klass = seqblock_class(seq);
try {
if (klass == rb_cFixnum) {
int n = 0;
cvSeqPop(seq, &n);
object = INT2FIX(n);
}
else {
object = GENERIC_OBJECT(klass, malloc(seq->elem_size));
cvSeqPop(seq, DATA_PTR(object));
}
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return object;
}
|
#push(obj, ...) ⇒ self Also known as: <<
Append - Pushes the given object(s) on the end of this sequence. This expression return the sequence itself, so several append may be chained together.
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# File 'ext/opencv/cvseq.cpp', line 343
VALUE
rb_push(VALUE self, VALUE args)
{
return rb_seq_push(self, args, CV_BACK);
}
|
#remove(index) ⇒ Object? Also known as: delete_at
Deletes the elements at the specified index.
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# File 'ext/opencv/cvseq.cpp', line 534
VALUE
rb_remove(VALUE self, VALUE index)
{
try {
cvSeqRemove(CVSEQ(self), NUM2INT(index));
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return self;
}
|
#shift ⇒ Object? Also known as: pop_front
Returns the first element of self and removes it (shifting all other elements down by one). Returns nil
if the array is empty.
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# File 'ext/opencv/cvseq.cpp', line 425
VALUE
rb_shift(VALUE self)
{
CvSeq *seq = CVSEQ(self);
if (seq->total == 0)
return Qnil;
VALUE object = Qnil;
try {
if (seqblock_class(seq) == rb_cFixnum) {
int n = 0;
cvSeqPopFront(seq, &n);
object = INT2NUM(n);
}
else {
object = GENERIC_OBJECT(seqblock_class(seq), malloc(seq->elem_size));
cvSeqPopFront(seq, DATA_PTR(object));
}
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return object;
}
|
#total ⇒ Integer Also known as: length, size
Return total number of sequence-block.
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# File 'ext/opencv/cvseq.cpp', line 148
VALUE
rb_total(VALUE self)
{
return INT2NUM(CVSEQ(self)->total);
}
|
#unshift ⇒ self Also known as: push_front
Prepends objects to the front of sequence. other elements up one.
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# File 'ext/opencv/cvseq.cpp', line 406
VALUE
rb_unshift(VALUE self, VALUE args)
{
VALUE result = Qnil;
try {
result = rb_seq_push(self, args, CV_FRONT);
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return result;
}
|
#v_next ⇒ nil
Return the sequence vertically located in next. Return nil
if not existing.
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# File 'ext/opencv/cvseq.cpp', line 277
VALUE
rb_v_next(VALUE self)
{
CvSeq *seq = CVSEQ(self);
if (seq->v_next)
return new_sequence(CLASS_OF(self), seq->v_next, seqblock_class(seq), lookup_root_object(seq));
else
return Qnil;
}
|
#v_prev ⇒ nil
Return the sequence vertically located in previous. Return nil
if not existing.
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# File 'ext/opencv/cvseq.cpp', line 260
VALUE
rb_v_prev(VALUE self)
{
CvSeq *seq = CVSEQ(self);
if (seq->v_prev)
return new_sequence(CLASS_OF(self), seq->v_prev, seqblock_class(seq), lookup_root_object(seq));
else
return Qnil;
}
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