Collider2D

Collider2D is a simple, object-oriented library for 2D collision detection.

Download

Visual C++ ( 32-bit | 64-bit )

Installing

In the project's properties, add:

• The path to the Collider2D headers (collider2d-install-path/include) to C/C++ > General > Additional Include Directories
• The path to the Collider2D libraries (collider2d-install-path/lib) to Linker > General > Additional Library Directories

These paths are the same in both Debug and Release configuration.

Library must be added in the project's properties, in Linker > Input > Additional Dependencies.

• For Debug - Collider2D-d.lib
• For Release - Collider2D.lib

Usage example

The library uses the cd:: namespace.

#include <vector>
#include <CollisionDetection.hpp>

int main()
{
	// create array of vertices
	std::vector<cd::Vector2<float>> vertices(5);

	// initialize it
	vertices[0] = cd::Vector2<float>(100.f, 80.f);
	// ...

	// create a convex shape from array of vertices
	cd::ConvexCollision convex(&vertices[0], vertices.size());

	// create another circle collision from its position and radius
	cd::CircleCollision circle(cd::Vector2<float>(100.f, 100.f), 50.f);

	// check if collisions overlap
	if (convex.intersects(circle))
	{
		// do something
	}

	// you can change the collisions
	convex[2].x = 20.f;
	convex[4] = cd::Vector2<float>(50.f, 50.f);

	circle.setRadius(150.f);

	// create a point
	cd::Vector2<float> point(80.f, 80.f);

	// check if collisions contain the point;
	if (convex.contains(point))
	{
		// do something
	}

	if (circle.contains(point))
	{
		// do something
	}

	return 0;
}

Supported collision types:

• AABB
• Circle
• Convex
• Compound

For CompoundCollision there are the following PrimitiveTypes:

• Triangles
• TriangleFan
• TriangleStrip

License

The Collider2D libraries and source code are under MIT license.
The example uses SFML which is under zlib/png license.