place zapper method

3 files changed, 41 insertions, 18 deletions

diff --git a/src/crepe/api/Vector2.h b/src/crepe/api/Vector2.h
index 52e1bb6..0f46964 100644
--- a/src/crepe/api/Vector2.h
+++ b/src/crepe/api/Vector2.h
@@ -11,55 +11,55 @@ struct Vector2 {
 	T y = 0;
 
 	//! Subtracts another vector from this vector and returns the result.
-	Vector2 operator-(const Vector2<T> & other) const;
+	Vector2<T> operator-(const Vector2<T> & other) const;
 
 	//! Subtracts a scalar value from both components of this vector and returns the result.
-	Vector2 operator-(T scalar) const;
+	Vector2<T> operator-(T scalar) const;
 
 	//! Adds another vector to this vector and returns the result.
-	Vector2 operator+(const Vector2<T> & other) const;
+	Vector2<T> operator+(const Vector2<T> & other) const;
 
 	//! Adds a scalar value to both components of this vector and returns the result.
-	Vector2 operator+(T scalar) const;
+	Vector2<T> operator+(T scalar) const;
 
 	//! Multiplies this vector by another vector element-wise and returns the result.
-	Vector2 operator*(const Vector2<T> & other) const;
+	Vector2<T> operator*(const Vector2<T> & other) const;
 
 	//! Multiplies this vector by a scalar and returns the result.
-	Vector2 operator*(T scalar) const;
+	Vector2<T> operator*(T scalar) const;
 
 	//! Divides this vector by another vector element-wise and returns the result.
-	Vector2 operator/(const Vector2<T> & other) const;
+	Vector2<T> operator/(const Vector2<T> & other) const;
 
 	//! Divides this vector by a scalar and returns the result.
-	Vector2 operator/(T scalar) const;
+	Vector2<T> operator/(T scalar) const;
 
 	//! Adds another vector to this vector and updates this vector.
-	Vector2 & operator+=(const Vector2<T> & other);
+	Vector2<T> & operator+=(const Vector2<T> & other);
 
 	//! Adds a scalar value to both components of this vector and updates this vector.
-	Vector2 & operator+=(T other);
+	Vector2<T> & operator+=(T other);
 
 	//! Subtracts another vector from this vector and updates this vector.
-	Vector2 & operator-=(const Vector2<T> & other);
+	Vector2<T> & operator-=(const Vector2<T> & other);
 
 	//! Subtracts a scalar value from both components of this vector and updates this vector.
-	Vector2 & operator-=(T other);
+	Vector2<T> & operator-=(T other);
 
 	//! Multiplies this vector by another vector element-wise and updates this vector.
-	Vector2 & operator*=(const Vector2<T> & other);
+	Vector2<T> & operator*=(const Vector2<T> & other);
 
 	//! Multiplies this vector by a scalar and updates this vector.
-	Vector2 & operator*=(T other);
+	Vector2<T> & operator*=(T other);
 
 	//! Divides this vector by another vector element-wise and updates this vector.
-	Vector2 & operator/=(const Vector2<T> & other);
+	Vector2<T> & operator/=(const Vector2<T> & other);
 
 	//! Divides this vector by a scalar and updates this vector.
-	Vector2 & operator/=(T other);
+	Vector2<T> & operator/=(T other);
 
 	//! Returns the negation of this vector.
-	Vector2 operator-() const;
+	Vector2<T> operator-() const;
 
 	//! Checks if this vector is equal to another vector.
 	bool operator==(const Vector2<T> & other) const;
@@ -89,10 +89,13 @@ struct Vector2 {
 	T distance_squared(const Vector2<T> & other) const;
 
 	//! Returns the perpendicular vector to this vector.
-	Vector2 perpendicular() const;
+	Vector2<T> perpendicular() const;
 
 	//! Checks if both components of the vector are NaN.
 	bool is_nan() const;
+
+	//! Rotate this vector clockwise by \c deg degrees
+	Vector2<T> rotate(float deg) const;
 };
 
 } // namespace crepe
diff --git a/src/crepe/api/Vector2.hpp b/src/crepe/api/Vector2.hpp
index e195760..a4ce641 100644
--- a/src/crepe/api/Vector2.hpp
+++ b/src/crepe/api/Vector2.hpp
@@ -168,4 +168,14 @@ bool Vector2<T>::is_nan() const {
 	return std::isnan(x) && std::isnan(y);
 }
 
+template <class T>
+Vector2<T> Vector2<T>::rotate(float deg) const {
+	float rad = -deg / 180 * M_PI;
+	return {
+		x * std::cos(rad) - y * std::sin(rad),
+		x * std::sin(rad) + y * std::cos(rad),
+	};
+}
+
+
 } // namespace crepe
diff --git a/src/test/Vector2Test.cpp b/src/test/Vector2Test.cpp
index 1e21af9..b17f95a 100644
--- a/src/test/Vector2Test.cpp
+++ b/src/test/Vector2Test.cpp
@@ -1,6 +1,7 @@
 #include <gtest/gtest.h>
 
 #include <crepe/api/Vector2.h>
+#include <crepe/types.h>
 
 using namespace crepe;
 
@@ -530,3 +531,12 @@ TEST_F(Vector2Test, Perpendicular) {
 	EXPECT_FLOAT_EQ(result4.x, -4.0f);
 	EXPECT_FLOAT_EQ(result4.y, 3.0f);
 }
+
+TEST_F(Vector2Test, Rotate) {
+	vec2 foo {0, 1};
+
+	foo = foo.rotate(90);
+	const float GOOD_ENOUGH = 0.001;
+	EXPECT_NEAR(foo.x, 1, GOOD_ENOUGH);
+	EXPECT_NEAR(foo.y, 0, GOOD_ENOUGH);
+}