Added Sprite::getRadius().

source/World.cpp

@@ -109,12 +109,10 @@ World::testCollision(std::shared_ptr<Sprite> spriteA,
 		}
 		axis = thor::unitVector(axis);
 		float centerA = thor::dotProduct(axis, spriteA->getPosition());
-		float radiusA = std::static_pointer_cast<sf::CircleShape>(
-				spriteA->mShape.shape)->getRadius();
+		float radiusA = spriteA->getRadius();
 		float movementA = thor::dotProduct(axis, spriteA->getSpeed() * (elapsed / 1000.0f));
 		float centerB = thor::dotProduct(axis, spriteB->getPosition());
-		float radiusB = std::static_pointer_cast<sf::CircleShape>(
-				spriteB->mShape.shape)->getRadius();
+		float radiusB = spriteB->getRadius();
 		float movementB = thor::dotProduct(axis, spriteB->getSpeed() * (elapsed / 1000.0f));
 
 		// Allow movement if sprites are moving apart.
@@ -132,8 +130,7 @@ World::testCollision(std::shared_ptr<Sprite> spriteA,
 		if (circle->mShape.type != Sprite::Shape::Type::CIRCLE) {
 			std::swap(circle, rect);
 		}
-		float radius =
-				std::static_pointer_cast<sf::CircleShape>(circle->mShape.shape)->getRadius();
+		float radius = circle->getRadius();
 		sf::Vector2f halfsize = rect->getSize() / 2.0f;
 		sf::Vector2f circlePos = circle->getPosition();
 		sf::Vector2f rectPos = rect->getPosition();

source/abstract/Sprite.cpp

@@ -188,3 +188,16 @@ void
 Sprite::setPosition(const sf::Vector2f& position) {
 	mShape.shape->setPosition(position);
 }
+
+/**
+ * Returns the radius of this sprite. Will fail if this is not a circle.
+ *
+ * @return The radius of this sprite.
+ */
+float
+Sprite::getRadius() const {
+	std::shared_ptr<sf::CircleShape> circleShape =
+			std::dynamic_pointer_cast<sf::CircleShape>(mShape.shape);
+	assert(circleShape);
+	return circleShape->getRadius();
+}

source/abstract/Sprite.h

@@ -81,6 +81,7 @@ protected:
 	void setSpeed(sf::Vector2f direction, float speed);
 	void setAngle(float angle);
 	void setPosition(const sf::Vector2f& position);
+	float getRadius() const;
 
 // Private types.
 private: