Topics

1

Graphics / Confusion concerning sf::Image pointers

« on: February 28, 2010, 06:59:29 am »

My current project is crashing at exit, complaining about corruption of the heap.
It seems to me that the problem is my image objects are being deleted a second time on exit! The crashing/heap problem goes away if I just remove the line where I manually delete my image.

Here's some code, try it for yourself (I'm using SFML2 revision 1429, Visual C++ 2008 Express). Put a breakpoint in Image::~Image in Image.cpp, and run this code. It breaks twice: once on my delete and another at the end of the program.

Code: [Select]

#include <SFML/Graphics.hpp>

sf::Image* Image;

int main()
{
Image = new sf::Image;
delete Image;

    return 0;
}

Is this standard behaviour for SFML?

2

Graphics / Drawing Large Numbers of Shapes Efficiently

« on: February 21, 2010, 09:44:10 am »

I have approximately 100,000 shapes, each with its own color and size.
They are going to be moving objects, so I must redraw them all each frame. They are all visible on the screen every frame.

Currently I'm rendering like this each loop:

Code: [Select]

App.Clear();
for (std::vector<sf::Shape>::iterator i = shapes.begin(); i != shapes.end(); i++)
{
App.Draw(*i);
}
App.Display();

I'm getting around 2 frames per second, which is obviously no good.
How can I significantly improve my rendering speed?