Huge refactor, Adding more code to engine from the game

entity.odin

@@ -1,4 +1,4 @@
-package ion
+package edit2d
 
 import b2 "vendor:box2d"
 import "core:fmt"
@@ -12,30 +12,13 @@ static_index_global :: struct
 	offset : b2.Vec2,
 }
 
+//DropProc               :: #type proc "c" (window: WindowHandle, count: c.int, paths: [^]cstring)
+
 /*
 	This file contains code to handle box2d stuffs of the game code
 	Don't put game's logic here
 */
 
-engine_world :: struct 
-{
-	world_id : b2.WorldId,
-	
-	//This in engine code?
-	static_indexes          : map[static_index]int `cbor:"-"`,
-	relations               : map[^static_index][dynamic]static_index_global `cbor:"-"`,
-	relations_serializeable : map[ static_index][dynamic]static_index_global,
-	
-	/*
-		Seems okay to put the joint defs in engine rather than in game because
-		we don't add more attributes in joints in the game
-
-		Can be changed later without requireing refactor
-	*/
-	revolute_joint_defs     : [dynamic]revolt_joint_def,
-	distant_joint_defs      : [dynamic]distance_joint_def,
-	joints                  : [dynamic]b2.JointId `cbor:"-"`,
-}
 
 engine_entity_flags_enum :: enum u64 {
 	POLYGON_IS_BOX,
@@ -75,6 +58,32 @@ engine_entity_def :: struct {
 	link_length_array : [dynamic]b2.Vec2,
 }
 
+default_engine_entity_def :: proc() -> engine_entity_def
+{
+	ret : engine_entity_def
+	ret.body_def   = b2.DefaultBodyDef()
+	ret.shape_def  = b2.DefaultShapeDef()
+	ret.shape_type = .polygonShape
+	ret.scale      = 1
+	ret.centers    = {{-10, 0}, {10, 0}}
+	ret.size       = {2, 2}
+	ret.radius     = 10
+	ret.body_count = 10
+	ret.rev_joint  = b2.DefaultRevoluteJointDef()
+
+	//for dynamic polygon
+	vs : [4]b2.Vec2 = {
+		{-1.0, -1.0},
+		{-1.0, 1.0},
+		{1.0, 1.0},
+		{1.0, -1.0},
+	}
+	ret.is_loop = true
+
+	for v in vs do append(&ret.vertices, v)
+	return ret
+}
+
 
 compare_engine_entity_def :: proc(a, b : engine_entity_def) -> bool
 {
@@ -118,6 +127,7 @@ engine_entity  :: struct {
 	joints        : [dynamic]b2.JointId,
 	entity_flags  : engine_entity_flags,
 	index         : ^static_index,
+	joint_id      : b2.JointId,
 } 
 
 
@@ -259,7 +269,11 @@ engine_entity_single_body :: proc(def : ^engine_entity_def, world_id: b2.WorldId
 	return new_entity
 }
 
-engine_create_chain_shape :: proc(def : ^engine_entity_def, world_id: b2.WorldId, index : i32) -> engine_entity
+engine_create_chain_shape :: proc(
+	def      : ^engine_entity_def,
+	world_id : b2.WorldId,
+	index    : i32
+	) -> engine_entity
 {
 	joint_def := def.rev_joint
 	orig_pos  := def.body_def.position 
@@ -296,6 +310,23 @@ engine_create_chain_shape :: proc(def : ^engine_entity_def, world_id: b2.WorldId
 }
 
 
+engine_create_entity :: proc(
+	def      : ^engine_entity_def,
+	world_id : b2.WorldId,
+	index    : i32
+	) -> engine_entity
+{
+
+	if .CHAIN not_in def.entity_flags
+	{
+		return engine_entity_single_body(def, world_id, index)
+	}
+	else 
+	{
+		return engine_create_chain_shape(def, world_id, index)
+	}
+
+}