improve Unit and utilities

main.odin

@@ -30,40 +30,19 @@ main :: proc() {
 	assert(render != nil)
 
 	units := make([dynamic]Unit)
-	append(
-		&units,
-		Unit {
-			faction = Faction.Allied,
-			position = util.Position{x = 500, y = 500},
-			velocity = DEFAULT_VELOCITY,
-			hp = 100,
-		},
-	)
-	append(
-		&units,
-		Unit {
-			faction = Faction.Enemy,
-			position = util.Position{x = 700, y = 700},
-			velocity = DEFAULT_VELOCITY,
-			hp = 100,
-		},
-	)
+	append(&units, NewUnit(Faction.Allied, util.Position{500, 500}))
+	append(&units, NewUnit(Faction.Enemy, util.Position{700, 700}))
 	input_state := make(map[sdl3.Scancode]bool)
 
 	time := sdl3.GetTicksNS()
 
 
 	game := Game {
-		render = render,
-		units = units,
-		player = Unit {
-			faction = Faction.Player,
-			position = util.Position{x = 255, y = 255},
-			velocity = DEFAULT_VELOCITY,
-			hp = 100,
-		},
-		time = time,
-		delta = 0.0,
+		render      = render,
+		units       = units,
+		player      = NewUnit(Faction.Player, util.Position{100, 100}, 200),
+		time        = time,
+		delta       = 0.0,
 		input_state = input_state,
 	}
 

movement.odin

@@ -4,19 +4,18 @@ import "core:fmt"
 import "util"
 import "vendor:sdl3"
 
-DEFAULT_VELOCITY: util.Velocity : util.Velocity{x = 0, y = 0}
-SPEED: f32 : 200
-
 HandleInput :: proc(game: ^Game, event: sdl3.Event) {
 	effect := event.type == sdl3.EventType.KEY_DOWN ? true : false
 	game.input_state[event.key.scancode] = effect
 }
 
 MovePlayer :: proc(game: ^Game) {
-	y: f32 = game.input_state[sdl3.Scancode.W] ? -SPEED : 0
-	y += game.input_state[sdl3.Scancode.S] ? SPEED : 0
-	x: f32 = game.input_state[sdl3.Scancode.A] ? -SPEED : 0
-	x += game.input_state[sdl3.Scancode.D] ? SPEED : 0
+	speed := game.player.speed
+
+	y: f32 = game.input_state[sdl3.Scancode.W] ? -speed : 0
+	y += game.input_state[sdl3.Scancode.S] ? speed : 0
+	x: f32 = game.input_state[sdl3.Scancode.A] ? -speed : 0
+	x += game.input_state[sdl3.Scancode.D] ? speed : 0
 	game.player.velocity = util.Velocity{x, y}
 
 	game.player.position.y += y * game.delta

unit.odin

@@ -3,6 +3,10 @@ package main
 import "util"
 import "vendor:sdl3"
 
+DEFAULT_HP :: 100
+DEFAULT_VELOCITY: util.Velocity : util.Velocity{x = 0, y = 0}
+DEFAULT_SPEED: f32 : 200
+
 Faction :: enum {
 	Player,
 	Allied,
@@ -13,6 +17,7 @@ Unit :: struct {
 	faction:  Faction,
 	position: util.Position,
 	velocity: util.Velocity,
+	speed:    f32,
 	hp:       u32,
 }
 
@@ -31,6 +36,24 @@ RenderUnit :: proc(unit: Unit, game: ^Game) {
 	)
 }
 
+NewUnit :: proc {
+	NewUnitBase,
+	NewUnitHp,
+	NewUnitAll
+}
+
+NewUnitBase :: proc(faction: Faction, position: util.Position) -> Unit {
+	return Unit{faction, position, DEFAULT_VELOCITY, DEFAULT_SPEED, DEFAULT_HP}
+}
+
+NewUnitHp :: proc(faction: Faction, position: util.Position, hp: u32) -> Unit {
+	return Unit{faction, position, DEFAULT_VELOCITY, DEFAULT_SPEED, hp}
+}
+
+NewUnitAll :: proc(faction: Faction, position: util.Position, speed: f32, hp: u32) -> Unit {
+	return Unit{faction, position, DEFAULT_VELOCITY, speed, hp}
+}
+
 Projectile :: struct {
 	faction:   Faction,
 	position:  util.Position,