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added rotation to vector2

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This commit is contained in:
herbglitch 2023-02-19 12:11:33 -07:00
parent edaddeb109
commit 0d9cf0f7f5
2 changed files with 19 additions and 0 deletions
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13
include/arc/math/vector2.h
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@ -13,8 +13,21 @@ typedef struct ARC_DVector2 {
double x, y; double x, y;
} ARC_DVector2; } ARC_DVector2;
/**
* @brief normalizes a given ARC_Vector2
*
* @param vector the ARC_Vecotr2 to normallize
*/
void ARC_Vector2_Normalize(ARC_Vector2 *vector); void ARC_Vector2_Normalize(ARC_Vector2 *vector);
/**
* @brief rotates a given ARC_Vector2 by a given angle in degrees
*
* @param vector the ARC_Vector2 to rotate
* @param angle the angle in degrees to rotate by
*/
void ARC_Vector2_RotateDegree(ARC_Vector2 *vector, float angle);
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

6
src/math/vector2.c
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@ -5,4 +5,10 @@ void ARC_Vector2_Normalize(ARC_Vector2 *vector){
float length = sqrtf((vector->x * vector->x) + (vector->y * vector->y)); float length = sqrtf((vector->x * vector->x) + (vector->y * vector->y));
vector->x /= length; vector->x /= length;
vector->y /= length; vector->y /= length;
}
void ARC_Vector2_RotateDegree(ARC_Vector2 *vector, float angle){
ARC_Vector2 temp = *vector;
vector->x = (temp.x * cos(angle)) - (temp.y * sin(angle));
vector->y = (temp.x * sin(angle)) + (temp.y * cos(angle));
} }