vertical collision detection

Assets/Materials/Ground.mat

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Assets/Materials/Player.mat

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Assets/Materials/Player.mat.meta

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Assets/Prefabs/Player.prefab

@@ -59,7 +59,8 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 721dfc7e43d81b644a34024174f78c4e, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  box: {fileID: 0}
+  horizontalRayCount: 4
+  verticalRayCount: 4
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 MonoBehaviour:
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@@ -130,7 +131,7 @@ MeshRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: 10303, guid: 0000000000000000f000000000000000, type: 0}
+  - {fileID: 2100000, guid: 0a9bab968ea62d04e8a60272e7909633, type: 2}
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Assets/Scripts/MoveController.cs

@@ -5,6 +5,7 @@ using UnityEngine;
 [RequireComponent(typeof(BoxCollider))]
 public class MoveController : MonoBehaviour
 {
+    public LayerMask collisionMask;
     public const float skinWidth = 0.015f;
     public int horizontalRayCount = 4;
     public int verticalRayCount = 4;
@@ -16,16 +17,39 @@ public class MoveController : MonoBehaviour
 
     void Start() {
         collider = GetComponent<BoxCollider>();
+        CalculateRaySpacing();
     }
 
-    void Update() {
+    public void Move(Vector3 velocity) {
         UpdateRaycastOrigins();
-        CalculateRaySpacing();
+        VerticalCollisions(ref velocity);
+        transform.Translate(velocity);
+    }
+
+    private void VerticalCollisions(ref Vector3 velocity) {
+        float directionY = Mathf.Sign(velocity.y);
+        float rayLength = Mathf.Abs(velocity.y) + skinWidth;
 
         // bottom face
         for (int i = 0; i < verticalRayCount; i++) {
             for (int j = 0; j < verticalRayCount; j++) {
-                Debug.DrawRay(raycastOrigins.bottomFrontLeft + Vector3.right * verticalRaySpacing * i - Vector3.back * verticalRaySpacing * j, Vector3.down, Color.red);
+                Vector3 rayOrigin = (directionY == -1) ? raycastOrigins.bottomFrontLeft : raycastOrigins.topFrontLeft;
+                rayOrigin += Vector3.right * (verticalRaySpacing * i + velocity.x);
+                RaycastHit[] hits = Physics.RaycastAll(rayOrigin, Vector3.up * directionY, rayLength, collisionMask);
+
+                if (hits.Length > 0) {
+                    float minHitDist = 0f;
+                    foreach(RaycastHit hit in hits) {
+                        if (hit.distance > minHitDist) {
+                            minHitDist = hit.distance;
+                        }
+                    }
+                    velocity.y = (minHitDist - skinWidth) * directionY;
+                    rayLength = minHitDist;
+                    Debug.DrawRay(raycastOrigins.bottomFrontLeft + Vector3.right * verticalRaySpacing * i - Vector3.back * verticalRaySpacing * j, Vector3.down * 0.25f, Color.red);
+                } else {
+                    Debug.DrawRay(raycastOrigins.bottomFrontLeft + Vector3.right * verticalRaySpacing * i - Vector3.back * verticalRaySpacing * j, Vector3.down * 0.25f, Color.green);
+                }
             }
         }
     }

Assets/Scripts/PlayerController.cs

@@ -6,11 +6,16 @@ using UnityEngine;
 public class PlayerController : MonoBehaviour {
     public MoveController moveController;
 
+    private float gravity = -20;
+    private Vector3 velocity;
+
     void Start() {
         moveController = GetComponent<MoveController>();
     }
 
     void Update() {
+        velocity.y += gravity * Time.deltaTime;
+        moveController.Move(velocity * Time.deltaTime);
     }
 
     void FixedUpdate() {