Colliders

2 files changed, 69 insertions, 11 deletions

diff --git a/engine/Components/Player.go b/engine/Components/Player.go
index 38a4636..cb8d459 100644
--- a/engine/Components/Player.go
+++ b/engine/Components/Player.go
@@ -1,50 +1,90 @@
 package components
 
 import (
+	"fmt"
+
 	coreobjects "github.com/DegustatorPonos/RuinesOfRafdolon/CoreObjects"
+	settings "github.com/DegustatorPonos/RuinesOfRafdolon/Settings"
 	rl "github.com/gen2brain/raylib-go/raylib"
 )
 
 type Player struct {
+	ParentScene *World
 	Position rl.Vector2
+	FaceDirection coreobjects.Direction
 	Texture rl.Texture2D
+
+	Collider coreobjects.Collider
+}
+
+func (base *Player) Init(manager coreobjects.SceneManager) {
+	if err := base.setParentScene(manager); err != nil {
+		panic(err.Error())
+	}
+	base.Collider = (&coreobjects.BoxCollider{}).Init(
+		base.Position.X,
+		base.Position.Y,
+		32, 32) // TODO: Change this to player description
 }
 
-func (base *Player) Create(_ coreobjects.SceneManager) {
+// Tries to set a parent scene as a world and returns an error if failed
+func (base *Player) setParentScene(manager coreobjects.SceneManager) error {
+	var baseScene, ok = manager.SelectedScene.(*World)
+	if !ok {
+		return fmt.Errorf( "Failed to create a player instance: the base scene is not a playable world (assertion failed)")
+	}
+	base.ParentScene = baseScene
+	return nil
 }
 
 func (base *Player) Destroy() {
 }
 
+func (base *Player) Move(delta rl.Vector2) {
+	var newLocation = rl.Vector2Add(base.Position, delta)
+	if !base.Collider.CanMove(base.ParentScene.GetStaticColliders(), 
+		newLocation.X, newLocation.Y) {
+			return
+	}
+	base.Collider.MoveTo(newLocation.X, newLocation.Y)
+	base.Position = newLocation
+}
+
 func (base *Player) Update() {
 	var speed = 150 * rl.GetFrameTime()
+	var delta = rl.Vector2{}
 	if rl.IsKeyDown(rl.KeyW) {
-		base.Position.Y -= speed
+		delta.Y -= speed
 	}
 	if rl.IsKeyDown(rl.KeyS) {
-		base.Position.Y += speed
+		delta.Y += speed
 	}
 	if rl.IsKeyDown(rl.KeyA) {
-		base.Position.X -= speed
+		delta.X -= speed
 	}
 	if rl.IsKeyDown(rl.KeyD) {
-		base.Position.X += speed
+		delta.X += speed
 	}
+	base.Move(delta)
 }
 
 func (base *Player) Draw() {
 	rl.DrawTexture(base.Texture, 
-	int32(base.Position.X),
-	int32(base.Position.Y),
-	rl.White)
+		int32(base.Position.X),
+		int32(base.Position.Y),
+		rl.White)
+	if settings.State.DrawColliders {
+		base.Collider.Draw()
+	}
 }
 
-func (base Player) SnapCamera (camera *rl.Camera2D) {
+// Centers the camera center to the player
+func (base Player) SnapCamera(camera *rl.Camera2D) {
 	var offset = rl.Vector2 {
 		X: float32(base.Texture.Width) / 2,
 		Y: float32(base.Texture.Height) / 2,
 	}
 	camera.Target = rl.Vector2Add(base.Position, offset)
-	camera.Offset.X = float32(rl.GetScreenWidth()) / 2
-	camera.Offset.Y = float32(rl.GetScreenHeight()) / 2
+	camera.Offset.X = float32(int32(rl.GetScreenWidth() / 2))
+	camera.Offset.Y = float32(int32(rl.GetScreenHeight() / 2))
 }
diff --git a/engine/Components/World.go b/engine/Components/World.go
index 7e6e8e3..2b7954a 100644
--- a/engine/Components/World.go
+++ b/engine/Components/World.go
@@ -14,13 +14,20 @@ type World struct {
 	Player *Player
 
 	Camera *rl.Camera2D
+
+	// ========== Cache ==========
+
+	// the collection of the colliders that belong to static objects - world, buildings, etc
+	staticColliders []*coreobjects.Collider
 }
 
 func (base *World) Create(manager coreobjects.SceneManager) {
 	base.Manager = manager
+	base.Player.Init(manager)
 }
 
 func (base *World) Destroy() {
+	base.Player.Destroy()
 }
 
 func (base *World) Update() {
@@ -34,6 +41,17 @@ func (base *World) handleZoom() {
 	base.Camera.Zoom += zoomSpeed * rl.GetMouseWheelMove()
 }
 
+func (base *World) collectStaticColliders() {
+	base.staticColliders = make([]*coreobjects.Collider, 0)
+}
+
+func (base *World) GetStaticColliders() []*coreobjects.Collider {
+	if base.staticColliders == nil {
+		base.collectStaticColliders()
+	}
+	return base.staticColliders
+}
+
 func (base *World) Draw() {
 	rl.BeginMode2D(*base.Camera)
 	defer rl.EndMode2D()