feat: add Cross2D for Kreuzprodukt vector calculation

include/engine.h

@@ -1,17 +1,16 @@
 #ifndef ENGINE_H
 #define ENGINE_H
 
+#include <math.h>
+#include <raygui.h>
 #include <raylib.h>
 #include <raymath.h>
-#include <raygui.h>
 #include <rini.h>
-#include <stdio.h>
 #include <stdbool.h>
+#include <stdio.h>
 #include <stdlib.h>
-#include <math.h>
 
-typedef struct
-{
+typedef struct {
   Texture2D texture;
   Rectangle sourceRec;
   Rectangle destRec;
@@ -67,14 +66,9 @@ typedef struct {
   rini_config rini;
 } Config;
 
-typedef enum {
-    NOT_CLICKED,
-    HOVER,
-    CLICKED
-} ButtonState;
+typedef enum { NOT_CLICKED, HOVER, CLICKED } ButtonState;
 
-typedef struct 
-{
+typedef struct {
   Sprite sprite;
   Vector2 notClicked;
   Vector2 hover;
@@ -83,13 +77,11 @@ typedef struct
   bool isClicked;
 } ImageButton;
 
-typedef struct
-{
+typedef struct {
   Sprite sprite;
 } ImageElement;
 
-typedef struct
-{
+typedef struct {
   Rectangle rec;
   char *text;
 } Button;
@@ -118,12 +110,12 @@ typedef struct {
   size_t count;
 } ObjectArray;
 
-typedef struct
-{
+typedef struct {
   Vector2 position;
   Vector2 direction;
   Vector2 velocity;
   float speed;
+  float weight;
 } Physics;
 
 typedef struct {
@@ -164,17 +156,20 @@ Camera2D* GetCamera(void);
 Rectangle GetCameraRectangle(void);
 void CreateCamera(Vector2 playerPosition, float initZoom);
 void UpdateCameraTarget(Vector2 *position, const float smoothness);
-void UpdateCameraZoom(const float *scaleFactor, const float *minZoom, const float *maxZoom);
+void UpdateCameraZoom(const float *scaleFactor, const float *minZoom,
+                      const float *maxZoom);
 void UpdateCamera2D(Vector2 *position, Mouse *mouse);
 
 void InitConfig(Config *config, const char *path);
 int GetConfigInt(Config *config, const char *key);
 int GetConfigIntOrDefault(Config *config, const char *key, int default_value);
 const char *GetConfigString(Config *config, const char *key);
-const char* GetConfigStringOrDefault(Config *config, const char *key, const char *default_value);
+const char *GetConfigStringOrDefault(Config *config, const char *key,
+                                     const char *default_value);
 const char *GetConfigDescription(Config *config, const char *key);
 int SetConfigInt(Config *config, const char *key, int value, const char *desc);
-int SetConfigString(Config *config, const char *key, const char *text, const char *desc);
+int SetConfigString(Config *config, const char *key, const char *text,
+                    const char *desc);
 int SetConfigDescription(Config *config, const char *key, const char *desc);
 int AddCommentLine(Config *config, const char *comment);
 void SaveConfig(Config *config);
@@ -183,8 +178,12 @@ void CleanUpConfig(Config *config);
 void InitFont(Font *font, const char *path);
 void CleanupFont(Font *font);
 
-ImageButton CreateImageButton(ButtonState state, Texture2D *texture, const TextureAsset *asset, Vector2 *source, Vector2 *clicked, Vector2 *hover, Rectangle *destRec);
-ImageElement CreateImageElement(Texture2D *texture, const TextureAsset *asset, Vector2 *source, Rectangle *destRec);
+ImageButton CreateImageButton(ButtonState state, Texture2D *texture,
+                              const TextureAsset *asset, Vector2 *source,
+                              Vector2 *clicked, Vector2 *hover,
+                              Rectangle *destRec);
+ImageElement CreateImageElement(Texture2D *texture, const TextureAsset *asset,
+                                Vector2 *source, Rectangle *destRec);
 int isImageButtonClicked(ImageButton *b, Sound soundHover, Sound soundClick);
 void renderImageButton(ImageButton *b);
 void renderImageElement(ImageElement *e);
@@ -193,18 +192,24 @@ Button initButton(char *text, Vector2 dimensions, Vector2 position);
 int isButtonClicked(Button *b);
 void renderButton(Button *b);
 
-Mouse CreateMouse(float zoomSpeed, float minZoom, float maxZoom, Texture2D *texture);
+Mouse CreateMouse(float zoomSpeed, float minZoom, float maxZoom,
+                  Texture2D *texture);
 void UpdateMouseScreen(Mouse *mouse);
 void UpdateMouse(Mouse *mouse);
 Vector2 GetDirectionVector(void);
 
 ObjectArray CreateObjectArray(const Object *prototype, const size_t count);
 Object *GetRandomObject(ObjectArray *objects);
-void AddObjectToArray(ObjectArray *objects, const Object *prototype, Vector2 position);
-void SetPositionForObjectArray(ObjectArray *objects, const Vector2Array *positions);
-void SetRandomPositionForObjectArray(ObjectArray *objects, const Rectangle bounds);
-void SwapAndPopObjectsArrayOnRecCollision(ObjectArray *objects, const Rectangle rec);
-void SwapAndPopObjectsArrayOnPointCollision(ObjectArray *objects, const Vector2 point);
+void AddObjectToArray(ObjectArray *objects, const Object *prototype,
+                      Vector2 position);
+void SetPositionForObjectArray(ObjectArray *objects,
+                               const Vector2Array *positions);
+void SetRandomPositionForObjectArray(ObjectArray *objects,
+                                     const Rectangle bounds);
+void SwapAndPopObjectsArrayOnRecCollision(ObjectArray *objects,
+                                          const Rectangle rec);
+void SwapAndPopObjectsArrayOnPointCollision(ObjectArray *objects,
+                                            const Vector2 point);
 void RenderObjectArray(const ObjectArray *objects);
 
 Vector2 GetDirectionBetweenTwoVectors(Vector2 vec1, Vector2 vec2);
@@ -233,9 +238,9 @@ bool IsVectorZero(Vector2 v);
 Vector2 GetRandomVector(const Rectangle bounds);
 Vector2 RotationToVector2(float rotation);
 float Vector2ToRotation(Vector2 vec);
+float Cross2D(Vector2 a, Vector2 b);
 
 Vector2 GetPositionInsideRectangle(Rectangle rec);
 Vector2 GetPositionOutsideRectangle(Rectangle rec, int min, int max);
 
 #endif // ENGINE_H
-

src/engineVector.c

@@ -8,20 +8,19 @@ bool IsVectorZero(Vector2 v) {
 Vector2 GetRandomVector(const Rectangle bounds) {
   return (Vector2){
       bounds.x + (float)GetRandomValue(0, 10000) / 10000.0f * bounds.width,
-        bounds.y + (float)GetRandomValue(0, 10000) / 10000.0f * bounds.height
-    };
+      bounds.y + (float)GetRandomValue(0, 10000) / 10000.0f * bounds.height};
 }
 
-Vector2 RotationToVector2(float rotation)
-{
+Vector2 RotationToVector2(float rotation) {
   float rad = rotation * (PI / 180.0f);
   Vector2 vec = {cosf(rad), sinf(rad)};
   return vec;
 }
 
-float Vector2ToRotation(Vector2 vec)
-{
+float Vector2ToRotation(Vector2 vec) {
   float rad = atan2f(vec.y, vec.x);
   float deg = rad * (180.0f / PI);
   return deg;
 }
+
+float Cross2D(Vector2 a, Vector2 b) { return a.x * b.y - a.y * b.x; }