input hand troubleshooting

Assets/backbox.hlsl

@@ -8,11 +8,15 @@ float4       color;
 struct vsIn {
 	float4 pos  : SV_Position;
 	float3 norm : NORMAL0;
-	float4 col  : COLOR0;
+	// float4 col  : COLOR0;
 };
 struct psIn {
 	float4 pos   : SV_POSITION;
 	float4 color : COLOR0;
+	float3 normal : NORMAL0;
+	float3 world_pos : WORLD;
+	float3 cam_pos : TEXCOORD1;
+	float3 cam_dir : TEXCOORD2;
 	uint view_id : SV_RenderTargetArrayIndex;
 };
 
@@ -21,23 +25,26 @@ psIn vs(vsIn input, uint id : SV_InstanceID) {
 	o.view_id = id % sk_view_count;
 	id        = id / sk_view_count;
 
+	o.cam_pos  = sk_camera_pos[o.view_id].xyz;
+	o.cam_dir  = sk_camera_dir[o.view_id].xyz;
+
 	float3 world = mul(float4(input.pos.xyz, 1), sk_inst[id].world).xyz;
 	o.pos        = mul(float4(world,         1), sk_viewproj[o.view_id]);
+	o.world_pos  = world;
 
-	float3 normal = normalize(mul(input.norm, (float3x3)sk_inst[id].world));
+	// flip input normals to treat backfaces like normal
+	o.normal = normalize(mul(-input.norm, (float3x3)sk_inst[id].world));
 
-
-	float3 norm_shade = float3(0.5) + (normal * 0.5);
-	// float3 norm_shade = float3(0.5) + (norm_color * 0.5);
-  float3 view_dir = normalize(world - sk_camera_pos[o.view_id]);
-  // o.color = norm_shaed * clamp(dot(o.normal, -view_dir), 0, 0.2);
-
-  // rim lighting
-  float rim = 1.0 - saturate(dot(normalize(view_dir), normal));
-  o.color = float4(norm_shade * rim * rim * 0.2, 1);
+	o.color = color * sk_inst[id].color;
 
 	return o;
 }
 float4 ps(psIn input) : SV_TARGET {
-	return input.color;
+	float3 view_dir = normalize(input.world_pos - input.cam_pos);
+	
+	// Fresnel effect calculation
+	float fresnel = 1.0 - saturate(dot(-view_dir, input.normal));
+	fresnel = pow(fresnel, 5.0); // Adjust power for different falloff rates
+	float value = 0.5;
+	return float4(fresnel * input.color.rgb * value, input.color.a);
 }

Platforms/Android/AndroidManifest.xml

@@ -2,8 +2,8 @@
 <manifest
   xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.dofdev.snake"
-  android:versionCode="11"
-  android:versionName="1.15"
+  android:versionCode="17"
+  android:versionName="1.27"
   android:installLocation="auto"
 >
   <uses-sdk android:minSdkVersion="29" android:targetSdkVersion="32" />

readme.md

@@ -49,23 +49,32 @@ todo
 
   target audience/experience
     ~13-18-year-olds who enjoy competitive, skill-based, solo gaming
+      sprinkle in some pop culture relevant to that age demographic that's in good taste to target interests
     seated experience on the Meta Quest 3/3S
     moderate learning curve
+      start outside of the box (about 6-9 segments long)
+      snake is moving like normal but is parented to an offset pose that keeps their head centered
+      so you can easily get a feel for how the snake moves
+      (sort of like writhing around in zero g)
+      *dreamlike*
+      wake up in box
     stylized visuals
     fun to play daily for a couple weeks or so
+      playable with a half engaging vid or conversation in the background
 
-  start outside of the box (about 6-9 segments long)
-  snake is moving like normal but is parented to an offset pose that keeps their head centered
-  so you can easily get a feel for how the snake moves
-  (sort of like writhing around in zero g)
-  *dreamlike*
-  wake up in box
+  my tempo
+    on l_con tap (a) btn to step, and repeatedly to set tempo
+    once a tempo has been set you can stop tapping and you'll coast at that tempo
+    if you tap again it resets the tempo latch, so if you just tapped once it's an easy way to pause
+    and if you keep tapping you can control your pace and find a new tempo
+    
+    long press (a) or tap (b) btn
+    to switch into coasting on tempo, in order to maintain the most control in ramping up and down speed with tapping without the tempo kicking in prematurely
 
-  mount/unmount box for orbital_view || handheld || desk/space view
-  if placed within 15 degree cone of head view then
-    mount (zero out relative x offset)
+    this makes it easier to play alongside a video, as your attention span can drift in and out
+    and you can take tougher parts slower
 
 bug(s)
-  food.spawn fails to find a spot and defaults to zero
+  ...
 
 ```

src/Arts.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Threading;
 using StereoKit;
 
 namespace snake;
@@ -9,6 +10,7 @@ static class Arts
     static Dictionary<string, Mesh> meshes = new();
     static Material mat_mono = new Material("mono.hlsl");
     static Material mat_unlit = new Material("unlit.hlsl");
+    static Material mat_box = new Material("unlit.hlsl");
     static Material mat_backbox = new Material("backbox.hlsl");
     static Material mat_justcolor = new Material("justcolor.hlsl");
 
@@ -29,8 +31,13 @@ static class Arts
             }
         }
 
-        mat_backbox.Transparency = Transparency.Add;
+
         mat_backbox.FaceCull = Cull.Front;
+        mat_backbox.Transparency = Transparency.Add;
+        mat_backbox.DepthTest = DepthTest.LessOrEq;
+        mat_backbox.DepthWrite = false;
+
+        mat_box.Chain = mat_backbox;
     }
 
     public static void Frame()
@@ -59,13 +66,16 @@ static class Arts
 
         // box
         Hierarchy.Push(Mono.box_pose.ToMatrix(Mono.box_scale));
-        meshes["InsideOut"].Draw(mat_unlit, Matrix.Identity);
-        meshes["InsideOut"].Draw(mat_backbox, Matrix.Identity);
+        // meshes["InsideOut"].Draw(mat_unlit, Matrix.Identity);
+        meshes["InsideOut"].Draw(
+            mat_box,
+            Matrix.Identity
+        );
         meshes["Corrugation"].Draw(
             Mono.in_dist.state ? mat_justcolor : mat_unlit,
             Matrix.Identity
         );
-        if (Mono.in_cone.state)
+        if (Mono.in_cone.state && Mono.box_mode == Mono.BoxMode.Hold || Mono.box_mode == Mono.BoxMode.Mount)
         {
             meshes["Hanging"].Draw(
                 mat_unlit,
@@ -78,14 +88,14 @@ static class Arts
             meshes["uiPlay"].Draw(
                 mat_unlit,
                 Matrix.TR(
-                    V.XYZ(0, 0, Mono.SD_Z + 0.5f + 0.1f),
+                    V.XYZ(0, 0, Mono.SD_Z - 0.5f + 0.1f),
                     Quat.FromAngles(90, 0, 0)
                 )
             );
             meshes["uiCursor"].Draw(
                 mat_unlit,
                 Matrix.TR(
-                    V.XYZ(0, 0, Mono.SD_Z + 0.5f + 0.2f),
+                    V.XYZ(0, 0, Mono.SD_Z - 0.5f + 0.2f),
                     Quat.FromAngles(90, 0, 0)
                 )
             );
@@ -93,7 +103,7 @@ static class Arts
 
         // snake
         float snake_t = headmove.state ? Maths.u_clamp(Maths.smooth_stop((float)Mono.step_t) * 3.0f) : 1.0f;
-        bool food_next = (Mono.snake[0] + Mono.snake_dir) == Mono.food;
+        bool food_next = !Mono.eaten_latch.state && (Mono.snake[0] + Mono.snake_dir) == Mono.food;
         if (!food_next)
         {
             meshes["Tongue"].Draw(
@@ -149,8 +159,24 @@ static class Arts
         // holes
         foreach (KeyValuePair<XYZi, XYZi> hole in Mono.holes)
         {
-            meshes["Hole"].Draw(
-                mat_unlit,
+            Vec3 hole_normal = V.XYZ(
+                Maths.abs(hole.Value.x) * Maths.sign(hole.Key.x),
+                Maths.abs(hole.Value.y) * Maths.sign(hole.Key.y),
+                Maths.abs(hole.Value.z) * Maths.sign(hole.Key.z)
+            );
+            // Vec3 hole_world_normal = Mono.box_pose.orientation * hole_normal;
+            // Vec3 hole_world = Mono.box_pose.ToMatrix(Mono.box_scale) * V.XYZ(
+            //     hole.Key.x - hole.Value.x * 0.5f,
+            //     hole.Key.y - hole.Value.y * 0.5f,
+            //     hole.Key.z - hole.Value.z * 0.5f
+            // );
+            // Vec3 cam_dir = (Rig.head.orientation * Vec3.Forward);
+            // Vec3 hole_view_dir = Vec3.Direction(hole_world, Rig.head.position);
+            // bool back_hole = Vec3.Dot(hole_world_normal, hole_view_dir) < 0.0;
+            bool hole_flip = Vec3.Dot(hole_normal, hole.Value.ToVec3) < 0.0;
+
+            meshes[hole_flip ? "Hole" : "HoleFlip"].Draw(
+                mat_box,
                 Matrix.TRS(
                     hole.Key.ToVec3,
                     Quat.LookDir(hole.Value.ToVec3),
@@ -169,13 +195,18 @@ static class Arts
                 10 * Time.Stepf
             );
         }
-        meshes["Food"].Draw(
-            mat_mono,
-            Matrix.TR(
-                Mono.food.ToVec3,
-                food_ori
-            )
-        );
+        if (!Mono.eaten_latch.state)
+        {
+            float food_t = Mono.eaten_latch.delta == -1 ? Maths.smooth_stop((float)Mono.step_t) : 1;
+            meshes["Food"].Draw(
+                mat_mono,
+                Matrix.TRS(
+                    Mono.food.ToVec3,
+                    food_ori,
+                    food_t
+                )
+            );
+        }
 
         Hierarchy.Pop();
 

src/Mono.cs

@@ -13,10 +13,10 @@ static class Mono
 
     public static Pose box_pose = new(0, -3 * U.cm, -10 * U.cm);
     public static float box_scale = 1.333f * U.cm;
-    public const int SD_X = 2, SD_Y = 1, SD_Z = 2;
+    public const int SD_X = 3, SD_Y = 2, SD_Z = 3;
     public static SpatialArray<int>
+        box_space = new(SD_X-1, SD_Y-1, SD_Z-1, -1),
         s_array = new(SD_X, SD_Y, SD_Z, -1),
-        head_fill = new(SD_X, SD_Y, SD_Z, -1),
         tail_fill = new(SD_X, SD_Y, SD_Z, -1);
 
     public static XYZi[] snake = new XYZi[
@@ -27,7 +27,8 @@ static class Mono
     public static XYZi snake_dir = new(0, 0, 1);
     public static DeltaBool in_box = new(true);
     public static Dictionary<XYZi, XYZi> holes = new();
-    public static XYZi food = new(2, 0, 0);
+    public static XYZi food = new(2, 0, 0); // [!] start random to keep new game fresh?
+    public static DeltaBool eaten_latch = new(false);
     public static double eat_timestamp = 0.0;
 
     public enum BoxMode
@@ -63,8 +64,11 @@ static class Mono
             if (Input.Key(Key.MouseCenter).IsActive())
             {
                 float sx = Input.Mouse.posChange.x;
-                float ssx = Maths.smooth_start(sx);
-                box_pose.orientation *= Quat.FromAngles(0, sx * 180.0f * Time.Stepf, 0);
+                Renderer.CameraRoot *= Matrix.R(
+                    Quat.FromAngles(0, -sx * 180.0f * Time.Stepf, 0)
+                );
+                // orbital_view
+                box_pose.position = Input.Head.position + Input.Head.orientation * V.XYZ(0, -0 * U.cm, -10 * U.cm);
             }
         }
         else
@@ -102,7 +106,13 @@ static class Mono
 
     public static void Step()
     {
-        if (s_array[snake[0] + snake_dir] > -1)
+        // eat tail
+        if (snake[0] + snake_dir == snake[snake_len-1])
+        {
+            snake_len--;
+            grow_buffer = 0;
+        }
+        else if (s_array[snake[0] + snake_dir] > -1)
         {
             // lose condition
             bool stuck = true;
@@ -120,14 +130,8 @@ static class Mono
             return;
         }
 
-        XYZi next_pos = snake[0] + snake_dir;
-        XYZi inset_pos = new(
-            next_pos.x - Maths.sign(next_pos.x),
-            next_pos.y - Maths.sign(next_pos.y),
-            next_pos.z - Maths.sign(next_pos.z)
-        );
-        bool around_box = s_array.InRange(inset_pos);
-        if (!around_box)
+        bool in_or_around_box = s_array.InRange(snake[0] + snake_dir);
+        if (!in_or_around_box)
         {
             return;
         }
@@ -157,7 +161,7 @@ static class Mono
             snake[0] += snake_dir;
         }
 
-        in_box.Step(s_array.InRange(snake[0]));
+        in_box.Step(box_space.InRange(snake[0]));
         if (in_box.delta != 0) // 1 just in -1 just out
         {
             holes.Add(snake[0], snake_dir);
@@ -175,51 +179,62 @@ static class Mono
         }
 
         // eat
-        if (food == snake[0])
+        if (!eaten_latch.state)
         {
-            eat_timestamp = Time.Total;
-            grow_buffer += 3;
+            eaten_latch.Step(food == snake[0]);
+            if (eaten_latch.delta == +1)
+            {
+                eat_timestamp = Time.Total;
+                grow_buffer += 3;
 
-            Feed();
-            SFX.crisp_nom.PlayBox(snake[0]);
+                SFX.crisp_nom.PlayBox(snake[0]);
+            }
+        } else {
+            (bool viable, XYZi cell) = Feed();
+            eaten_latch.Step(!viable);
+            if (eaten_latch.delta == -1)
+            {
+                food = cell;
+            }
         }
     }
 
-    static void Feed()
+    static (bool, XYZi) Feed()
     {
-        head_fill.Clear(-1);
-        Gas(head_fill, snake[0]);
-
-        // handle out of the box exception on tail
+        // [!] handle out of the box exception on tail
+        // by making the spatial arrays encapsulate the layer outside of the box
         tail_fill.Clear(-1);
         Gas(tail_fill, snake[snake_len - 1]);
 
-        XYZi farthest_cell = new XYZi(0, 0, 0);
-        int farthest_dist = 0;
-        // [*] design configurable (we basically want it to be as far away as it can reasonably be)
-        const int max_dist = 6;
-        // [!] given how it loops over the space it directionally biases the results
-        for (int sx = -s_array.Xslen; s_array.InX(sx); sx++)
+        // step from head using directions towards the tail
+        // and stop at either 1 cell away from the tail or 5 spaces away from the head
+        bool viable = false;
+        XYZi cell = snake[0];
+        for (int step = 0; step < 5; step++)
         {
-            for (int sy = -s_array.Yslen; s_array.InY(sy); sy++)
+            int min_dist = 100;
+            XYZi min_cell = new();
+            int[] dir_indices = GetShuffledIndices(directions);
+            for (int i = 0; i < directions.Length; i++)
             {
-                for (int sz = -s_array.Zslen; s_array.InZ(sz); sz++)
+                XYZi dir = directions[dir_indices[i]];
+                XYZi dir_cell = cell + dir;
+                int tail_dist = tail_fill[dir_cell];
+                if (tail_dist > 1 && tail_dist < min_dist && box_space.InRange(dir_cell))
                 {
-                    XYZi sv = new XYZi(sx, sy, sz);
-                    int dist = head_fill[sv];
-                    bool good_dist = dist > farthest_dist && dist < max_dist;
-                    bool tail_access = tail_fill[sv] > 0; // help ensure completability
-                    bool snake_free = s_array[sv] == -1;
-                    if (good_dist && tail_access && snake_free)
-                    {
-                        farthest_dist = dist;
-                        farthest_cell = sv;
-                    }
+                    min_dist = tail_dist;
+                    min_cell = dir_cell;
+                    viable = true;
                 }
             }
+            cell = min_cell;
+            // if (min_dist <= 1)
+            // {
+            //     break;
+            // }
         }
 
-        food = farthest_cell;
+        return (viable, cell);
     }
 
     // space fill algorithm
@@ -248,6 +263,23 @@ static class Mono
         }
     }
 
+    static int[] GetShuffledIndices<T>(T[] array)
+    {
+        int[] indices = new int[array.Length];
+        for (int i = 0; i < array.Length; i++)
+        {
+            indices[i] = i;
+        }
+        for (int i = indices.Length - 1; i > 0; i--)
+        {
+            int j = System.Random.Shared.Next(i + 1);
+            int temp = indices[i];
+            indices[i] = indices[j];
+            indices[j] = temp;
+        }
+        return indices;
+    }
+
     // directions for moving in the grid
     static readonly XYZi[] directions = new XYZi[]
     {
@@ -269,4 +301,14 @@ static class Mono
         new XYZi(+1, +1, -1),
         new XYZi(+1, +1, +1)
     };
+
+    static XYZi InsetCell(XYZi cell)
+    {
+        // [!] don't inset past 0
+        return new(
+            cell.x - Maths.sign(cell.x),
+            cell.y - Maths.sign(cell.y),
+            cell.z - Maths.sign(cell.z)
+        );
+    }
 }

src/Rig.cs

@@ -39,14 +39,17 @@ static class Rig
         else
         {
             // Hand r_hand = Input.Hand(Handed.Right);
+            // [!] hand input simulates controller...
             Controller r_con = Input.Controller(Handed.Right);
-            btn_trigger.Step(r_con.trigger > 0.5f);
-            btn_grip.Step(r_con.grip > 0.5f);
 
             bool con_tracked = r_con.trackedPos > TrackState.Lost;
-            Input.HandVisible(Handed.Max, !con_tracked);
+            // bool hand_tracked = Input.HandSource(Handed.Right) > HandSource.None;
+            Input.HandVisible(Handed.Max, false); // hide hands
             if (con_tracked)
             {
+                btn_trigger.Step(r_con.trigger > 0.5f);
+                btn_grip.Step(r_con.grip > 0.5f);
+
                 Vec2 stick = r_con.stick;
                 Quat stick_rot = Quat.FromAngles(stick.y * -90, 0, stick.x * +90);
                 float stick_sign = r_con.IsStickClicked ? -1 : +1;