fixed movement

Player.cs

@@ -1,4 +1,5 @@
 using OpenTK.Mathematics;
+using OpenTK.Windowing.Common;
 using OpenTK.Windowing.GraphicsLibraryFramework;
 using System;
 using System.Collections.Generic;
@@ -16,14 +17,14 @@ namespace Voxel
 
         private int _blockIndex = 0;
         private double _tickTime = 0;
-        private bool _isJumping = false;
+        private bool _isSprinting = false;
 
         private Blocks _selectedBlock = Blocks.OakPlanks;
         private Vector3 previousPosition;
 
         public Player(Vector3 startPos, World world) : base(startPos, 0.5f, 1.8f, world)
         {
-
+            Input.OnMouseWheel += SwitchBlock;
         }
 
         public void PlaceBlock()
@@ -46,26 +47,36 @@ namespace Voxel
             _world.SetBlock(x, y, z, Blocks.Air);
         }
 
-        public void Tick()
+        public new void Tick()
         {
             previousPosition = Position;
 
-            bool sprinting = Input.GetKey(Keys.LeftControl);
+            float forwards = 0;
+            float sidewards = 0;
 
             if (Input.GetKey(Keys.W))
-                ApplyWalkSpeed(0, -1, sprinting);
+                forwards = -1;
             if (Input.GetKey(Keys.S))
-                ApplyWalkSpeed(0, 1, sprinting);
+                forwards = 1;
             if (Input.GetKey(Keys.A))
-                ApplyWalkSpeed(-1, 0, false);
+                sidewards = -1;
             if (Input.GetKey(Keys.D))
-                ApplyWalkSpeed(1, 0, false);
+                sidewards = 1;
+
+            _isSprinting = (Input.GetKey(Keys.LeftControl) && forwards != 0);
 
             if (Input.GetKey(Keys.Space) && OnGround)
             {
                 Console.WriteLine("Jump");
                 Velocity = new Vector3(Velocity.X, 0.42f, Velocity.Z);
                 OnGround = false;
+
+                if (_isSprinting)
+                {
+                    float yawRad = MathHelper.DegreesToRadians(Rotation);
+                    Velocity.X += 0.2f * MathF.Sin(yawRad);
+                    Velocity.Z += 0.2f * -MathF.Cos(yawRad);
+                }
             }
 
             if (Input.GetMouseButton(MouseButton.Right) && lastClick == 0)
@@ -82,6 +93,7 @@ namespace Voxel
                 BreakBlock();
             }
 
+            ApplyWalkSpeed(sidewards, forwards);
             base.Tick();
 
             Console.WriteLine(Velocity.X.ToString() + ", " + Velocity.Y.ToString() + ", " + Velocity.Z.ToString());
@@ -92,6 +104,16 @@ namespace Voxel
             Camera.Position = Vector3.Lerp(previousPosition, Position, alpha) + Vector3.UnitY * 0.62f;
             Rotation = Camera.Yaw;
 
+            if (_isSprinting)
+            {
+                Camera.TargetFOV = 70;
+                Camera.UpdateProjection();
+            }
+            else
+            {
+                Camera.TargetFOV = 60;
+            }
+
             if (lastClick > 0)
             {
                 lastClick -= deltaTime;
@@ -104,7 +126,7 @@ namespace Voxel
             }
         }
 
-        public void ApplyWalkSpeed(float x, float z, bool sprinting)
+        public void ApplyWalkSpeed(float x, float z)
         {
             Vector3 inputDir = new Vector3(x, 0, z);
             if (inputDir.LengthSquared > 0)
@@ -120,15 +142,32 @@ namespace Voxel
                 inputDir.X * sin + inputDir.Z * cos
             );
 
-            float speed = sprinting ? 0.13f : 0.10f;
+            float M_t = _isSprinting ? 1.3f : 1f;
+            float groundMultiplier = 0.6f;
 
-            Velocity += worldDir * speed;
+            if (!OnGround)
+            {
+                Vector3 airAccel = worldDir * 0.02f * M_t;
+                Velocity = new Vector3(Velocity.X + airAccel.X, Velocity.Y, Velocity.Z + airAccel.Z);
+            }
+            else
+            {
+                Vector3 groundAccel = worldDir * 0.1f * M_t;
+                Velocity = new Vector3(Velocity.X * groundMultiplier + groundAccel.X,
+                              Velocity.Y,
+                              Velocity.Z * groundMultiplier + groundAccel.Z);
+            }
         }
 
-        public void SwitchBlock(bool inverted)
+        public void SwitchBlock(MouseWheelEventArgs e)
         {
             var keys = BlockDefinitions.Blocks.Keys.ToList();
 
+            bool inverted = false;
+            
+            if (e.OffsetY < 0)
+                inverted = true;
+
             if (inverted)
                 if (_blockIndex == 0)
                     _blockIndex = keys.Count -1;