erase

I need to crop corners on ImageView . Not to round them but erase triangles from each corner. Seems like the only way to do that is to override onDraw method and erase these areas from canvas using Path . The problem is I have not solid color background, so I need ERASE these areas but not to fill them with some color. I use following code for that: @Override protected void onDraw(Canvas canvas) { Path path = new Path(); path.moveTo(0, 0); path.lineTo(20, 0); path.lineTo(0, 20); path.close(); Paint paint = new Paint(); paint.setAntiAlias(true); paint.setXfermode(new PorterDuffXfermode

The STL standard defines that when an erase occurs on containers such as std::deque, std::list etc iterators are invalidated. My question is as follows, assuming the list of integers contained in a std::deque, and a pair of indicies indicating a range of elements in the std::deque, what is the correct way to delete all even elements? So far I have the following, however the problem here is that the assumed end is invalidated after an erase: #include <cstddef> #include <deque> int main() { std::deque<int> deq; for (int i = 0; i < 100; deq.push_back(i++)); // range, 11th to 51st element std:

Just want to remove duplicates. Pool is vector<pair<string, int>> but I seem to miss some elements at the start of the vector somehow. Can anyone verify the logic of the removal? Thanks :) Pool Master::eliminateDuplicates(Pool generation) { for(int i = 0; i < generation.size(); i++) { string current = generation.at(i).first; for(int j = i; j < generation.size(); j++) { if(j == i) { continue; } else { string temp = generation.at(j).first; if(current.compare(temp) == 0) { Pool::iterator iter = generation.begin() + j; generation.erase(iter); } } } } return generation; } This is a very common

I'm trying to remove items from a C++ linked list using erase and a list iterator: #include <iostream> #include <string> #include <list> class Item { public: Item() {} ~Item() {} }; typedef std::list<Item> list_item_t; int main(int argc, const char *argv[]) { // create a list and add items list_item_t newlist; for ( int i = 0 ; i < 10 ; ++i ) { Item temp; newlist.push_back(temp); std::cout << "added item #" << i << std::endl; } // delete some items int count = 0; list_item_t::iterator it; for ( it = newlist.begin(); count < 5 ; ++it ) { std::cout << "round #" << count << std::endl; newlist

I am new to C++ and want to do vector element elimination. My vectors are like: <vector<vector>> objPoints; <vector<vector>> delPoints; <vector<vector>> objPoints2; each objPoints has size 1000x3 and has all points. From objPoints i want to remove delPoints i.e. the (X,Y,Z) values that reside in each row. Can anyone please tell me syntax? I interpret your questions as follows: You have two vectors objPoints and delPoints which contain 1000 three-dimensional points. I would encode this as std::vector<std::array<int,3> > objPoints; where I assumed you have some raster such that you can desribe

I have a little paint application which was based on the GLPaint sample code. It is working fine. My Problem is that I need to implement a "brush" that erases the textures which were already drawn. My goal is to have an eraser which has soft edges. Right now I just took the same texture which I used for drawing but switched the blending functions from glBlendFunc(GL_SRC_ALPHA, GL_ONE); to glBlendFunc(GL_ZERO, GL_ZERO); The result is a square rectangular eraser. That is ok but it's not what I actually want. I need soft edges. I want to make a round eraser not a square rectangular. Do you have