From 21a66f7fe6b7fc35d43bb35fb7d7549d22396fb5 Mon Sep 17 00:00:00 2001
From: herbglitch <herbglitch@protonmail.com>
Date: Mon, 7 Apr 2025 06:41:52 -0600
Subject: [PATCH] small fixes for config, entity, and some physics functions
 for vector2

---
 include/arc/math/vector2.h | 24 ++++++++++++++++++++++++
 include/arc/std/config.h   | 12 +++++++++++-
 src/math/vector2.c         | 14 +++++++++++++-
 src/std/config.c           | 11 +++++++++++
 src/std/entity.c           |  2 +-
 5 files changed, 60 insertions(+), 3 deletions(-)

diff --git a/include/arc/math/vector2.h b/include/arc/math/vector2.h
index ba98114..3207cda 100644
--- a/include/arc/math/vector2.h
+++ b/include/arc/math/vector2.h
@@ -28,6 +28,30 @@ void ARC_Vector2_Normalize(ARC_Vector2 *vector);
 */
 void ARC_Vector2_RotateDegree(ARC_Vector2 *vector, float angle);
 
+/**
+ * @brief
+ * 
+ * @param vector1
+ * @param vector2
+*/
+float ARC_Vector2_CrossProduct(ARC_Vector2 vector1, ARC_Vector2 vector2);
+
+/**
+ * @brief
+ * 
+ * @param vector
+ * @param scalar
+*/
+ARC_Vector2 ARC_Vector2_CrossProductScalar(ARC_Vector2 vector, float scalar);
+
+/**
+ * @brief
+ * 
+ * @param scalar
+ * @param vector
+*/
+ARC_Vector2 ARC_Vector2_ScalarCrossProduct(float scalar, ARC_Vector2 vector);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/arc/std/config.h b/include/arc/std/config.h
index 92e0d80..afbf3d0 100644
--- a/include/arc/std/config.h
+++ b/include/arc/std/config.h
@@ -221,7 +221,17 @@ void ARC_Config_UnloadFromString(ARC_Config *config, ARC_String **string);
  * @breif config the config to unload the file from
  * @breif path   the location of the .chemical file to unload
 */
-void ARC_Config_UnloadFromFile(ARC_Config *config, ARC_String *data);
+void ARC_Config_UnloadFromFile(ARC_Config *config, ARC_String *path);
+
+/**
+ * @brief takes a given file path and unloads it into the config
+ *
+ * @note this path will be based on wherever the executable is run from
+ *
+ * @breif config the config to unload the file from
+ * @breif path   the location of the .chemical file to unload
+*/
+void ARC_Config_UnloadFromFileWithCStr(ARC_Config *config, const char *path);
 
 /**
  * @{
diff --git a/src/math/vector2.c b/src/math/vector2.c
index a825903..aa80684 100644
--- a/src/math/vector2.c
+++ b/src/math/vector2.c
@@ -15,4 +15,16 @@ 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));
-}
\ No newline at end of file
+}
+
+float ARC_Vector2_CrossProduct(ARC_Vector2 vector1, ARC_Vector2 vector2){
+    return (vector1.x * vector2.y) - (vector1.y * vector2.x);
+}
+
+ARC_Vector2 ARC_Vector2_CrossProductScalar(ARC_Vector2 vector, float scalar){
+    return (ARC_Vector2){ scalar * vector.y, -scalar * vector.x };
+}
+
+ARC_Vector2 ARC_Vector2_ScalarCrossProduct(float scalar, ARC_Vector2 vector){
+    return (ARC_Vector2){ -scalar * vector.y, scalar * vector.x };
+}
diff --git a/src/std/config.c b/src/std/config.c
index c32bafb..a8995e4 100644
--- a/src/std/config.c
+++ b/src/std/config.c
@@ -1046,6 +1046,17 @@ void ARC_Config_UnloadFromFile(ARC_Config *config, ARC_String *path){
     ARC_Parser_ParseFile(config->parser, path);
 }
 
+void ARC_Config_UnloadFromFileWithCStr(ARC_Config *config, const char *path){
+    config->load = ARC_False;
+
+    ARC_String *pathString;
+    ARC_String_CreateWithStrlen(&pathString, (char *)path);
+
+    ARC_Parser_ParseFile(config->parser, pathString);
+
+    ARC_String_Destroy(pathString);
+}
+
 void ARC_Config_InitStd(ARC_Config *config){
     ARC_Config_RegisterTypeWithCStr(config, "bool"      , (ARC_ConfigType){ sizeof(ARC_Bool)  , ARC_ConfigType_BoolCopyFn  , ARC_ConfigType_BoolDestroyFn  , NULL });
     ARC_Config_RegisterTypeWithCStr(config, "int8"      , (ARC_ConfigType){ sizeof(int8_t)    , ARC_ConfigType_Int8CopyFn  , ARC_ConfigType_Int8DestroyFn  , NULL });
diff --git a/src/std/entity.c b/src/std/entity.c
index 72f72d5..d83a4bd 100644
--- a/src/std/entity.c
+++ b/src/std/entity.c
@@ -78,7 +78,7 @@ uint32_t ARC_EntitySystem_RegisterComponent(ARC_EntitySystem *entitySystem, uint
     uint32_t offsetEndIndex = ARC_VectorInline_GetSize(entitySystem->offsetVector);
     uint32_t totalSize = 0;
     if(ARC_VectorInline_GetSize(entitySystem->offsetVector) != 0){
-        totalSize = *(uint32_t *)ARC_VectorInline_Get(entitySystem->offsetVector, offsetEndIndex);
+        totalSize = *(uint32_t *)ARC_VectorInline_Get(entitySystem->offsetVector, offsetEndIndex - 1);
     }
 
     //if the new component size would overflow, throw an error