color cube

Assets/colorcube.hlsl

@@ -0,0 +1,48 @@
+#include "stereokit.hlsli"
+
+//--name = dofdev/colorcube
+//--color:color = 1, 1, 1, 1
+
+float4       color;
+
+struct vsIn {
+	float4 pos  : SV_Position;
+	float3 norm : NORMAL0;
+};
+struct psIn {
+	float4 pos   : SV_POSITION;
+	float3 col_pos : TEXCOORD0;
+	float4 color : COLOR0;
+	uint view_id : SV_RenderTargetArrayIndex;
+};
+
+float f_inv(float x) {
+	if (x >= 0.04045) {
+		return pow((x + 0.055)/(1 + 0.055), 2.4);
+	}
+	
+	return x / 12.92;
+}
+
+psIn vs(vsIn input, uint id : SV_InstanceID) {
+	psIn o;
+	o.view_id = id % sk_view_count;
+	id        = id / sk_view_count;
+
+	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.col_pos    = input.pos.xyz + float3(0.5, 0.5, 0.5);
+
+	float3 normal = normalize(mul(input.norm, (float3x3)sk_inst[id].world));
+
+	o.color = color * sk_inst[id].color;
+	return o;
+}
+
+float4 ps(psIn input) : SV_TARGET {
+	// pos to color
+	float3 col = float3(input.col_pos);
+	
+	// linear to sRGB
+	return float4(f_inv(col.r), f_inv(col.g), f_inv(col.b), 1);
+}

Platforms/Android/AndroidManifest.xml

@@ -2,8 +2,8 @@
 <manifest
   xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.dofdev.dofdemo"
-  android:versionCode="9"
+  android:versionCode="10"
-  android:versionName="1.09"
+  android:versionName="1.10"
   android:installLocation="auto"
 >
   <uses-sdk android:minSdkVersion="29" android:targetSdkVersion="32" />

readme.md

@@ -51,7 +51,8 @@ todo
 
   featuring:
     [x] stretch_cursor
-    [ ] color_cube // move cube around picker which is constrained by cube limits
+    [x] color_cube
+    [ ] reach_cursor
     [ ] orbital_view // same dis/mount system as snake in a box
     [ ] fullstick
     [ ] twist_cursor

src/Arts.cs

@@ -12,7 +12,8 @@ static class Arts
     static Material mat_both = new Material("unlit.hlsl");
     static Material mat_backface = new Material("backface.hlsl");
     static Material mat_justcolor = new Material("justcolor.hlsl");
-
+    static Material mat_colorcube = new Material("colorcube.hlsl");
+    static Material mat_colorcursor = new Material("justcolor.hlsl");
     public static Vec3 shake = new(0, 0, 0);
 
     static TextStyle text_style;
@@ -39,11 +40,14 @@ static class Arts
         mat_backface.DepthWrite = false;
 
         mat_both.Chain = mat_backface;
+
+        // draw ontop of everything
+        mat_colorcursor.DepthTest = DepthTest.Always;
     }
 
     public static void Frame()
     {
-        // Input.HandVisible(Handed.Max, false);
+        Input.HandVisible(Handed.Max, false);
 
         // world
         // Matrix m4_dof = Mono.dof_pose.ToMatrix(Mono.dof_scl);
@@ -85,33 +89,52 @@ static class Arts
             );
         }
 
-        // reach cursor
+        // color_cube
-        // pos = trackedPoint
+        {
-        // if down
+            meshes["color_cube"].Draw(
-        // pullPoint = pos
+                mat_colorcube,
+                ColorCube.grab.pose.ToMatrix(ColorCube.scl)
+            );
 
-        // stretch = distance(pullPoint, pos)
+            Hierarchy.Push(ColorCube.grab.pose.ToMatrix(ColorCube.scl));
-        // dir = (pos - pullPoint).normalized
+            // ColorCube.cursor render ontop *degree symbol with color inside
-        // cursor = pos + dir * stretch * 3
+            Mesh.Sphere.Draw(
+                mat_colorcursor,
+                Matrix.TS(
+                    ColorCube.cursor,
+                    24.0f * U.cm
+                ),
+                Color.White
+            );
+            Mesh.Sphere.Draw(
+                mat_colorcursor,
+                Matrix.TS(
+                    ColorCube.cursor,
+                    16.0f * U.cm
+                ),
+                ColorCube.color
+            );
+            Hierarchy.Pop();
+        }
 
         // Hierarchy.Pop();
 
 
         // particles
-        Particle[] particles = VFX.particles;
+        // Particle[] particles = VFX.particles;
-        for (int i = 0; i < particles.Length; i++)
+        // for (int i = 0; i < particles.Length; i++)
-        {
+        // {
-            Particle particle = particles[i];
+        //     Particle particle = particles[i];
-            meshes["FoodParticle"].Draw(
+        //     meshes["FoodParticle"].Draw(
-                mat_unlit,
+        //         mat_unlit,
-                Matrix.TRS(
+        //         Matrix.TRS(
-                    particle.pos,
+        //             particle.pos,
-                    particle.ori,
+        //             particle.ori,
-                    particle.scl
+        //             particle.scl
-                ),
+        //         ),
-                Color.Hex(0xC75A09FF).ToLinear()
+        //         Color.Hex(0xC75A09FF).ToLinear()
-            );
+        //     );
-        }
+        // }
 
         // menu
         Matrix m4_menu = Mono.menu_pose.ToMatrix(Mono.menu_scale);

src/Dofs.cs

@@ -30,3 +30,49 @@ static class Stretch
     static float deadzone = 0.1f;
     static float strength = 3;
 }
+
+static class ColorCube
+{
+    public static float scl = 6 * U.cm;
+    public static Grab grab;
+    static Vec3 last_position;
+
+    public static Vec3 cursor;
+    public static Color color;
+
+    public static void Init()
+    {
+        grab = new();
+    }
+
+    public static void Frame()
+    {
+        Vec3 delta = grab.pose.position - last_position;
+        // move cube around picker which is constrained by cube limits
+        cursor -= delta / scl;
+
+        cursor = V.XYZ(
+            Maths.s_clamp(cursor.x, 0.5f),
+            Maths.s_clamp(cursor.y, 0.5f),
+            Maths.s_clamp(cursor.z, 0.5f)
+        );
+
+        color = new Color(
+            f_inv(cursor.x + 0.5f),
+            f_inv(cursor.y + 0.5f),
+            f_inv(cursor.z + 0.5f),
+            1
+        );
+
+        last_position = grab.pose.position;
+    }
+
+    static float f_inv(float x) {
+        if (x >= 0.04045f) {
+            return MathF.Pow((x + 0.055f) / (1 + 0.055f), 2.4f);
+        }
+
+        return x / 12.92f;
+    }
+}
+

src/Mono.cs

@@ -36,6 +36,7 @@ static class Mono
         // dof_pose = new(0, 0, 0); // new(0, -1, -2);
         // dof_scl = 1.0f; // 0.1f;
         Stretch.Init();
+        ColorCube.Init();
     }
 
     public static void Frame()
@@ -99,7 +100,8 @@ static class Mono
         Grab[] grabs = new Grab[]
         {
             Stretch.to_grab,
-            Stretch.from_grab
+            Stretch.from_grab,
+            ColorCube.grab,
         };
         foreach (var grab in grabs)
         {
@@ -150,5 +152,6 @@ static class Mono
         }
 
         Stretch.Frame();
+        ColorCube.Frame();
     }
 }