draw cluster of leafs at top of bamboo using noise offstep

slash.csproj

@@ -20,6 +20,6 @@
 	</ItemGroup>
 
 	<ItemGroup>
-	  <PackageReference Include="StereoKit" Version="0.3.9" />
+	  <PackageReference Include="StereoKit" Version="0.3.8" />
 	</ItemGroup>
-</Project>
+</Project>

src/Arts.cs

@@ -9,6 +9,7 @@ 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_add = new Material("unlit.hlsl");
     static Material mat_both = new Material("unlit.hlsl");
     static Material mat_backface = new Material("backface.hlsl");
     static Material mat_justcolor = new Material("justcolor.hlsl");
@@ -52,11 +53,15 @@ static class Arts
         }
 
         text_style = TextStyle.FromFont(
-            Font.FromFile("Staatliches.ttf"),
+            Font.FromFile("Assets/Staatliches.ttf"),
             1.0f * U.cm,
             Color.White
         );
 
+        mat_add.Transparency = Transparency.Add;
+        mat_add.DepthTest = DepthTest.LessOrEq;
+        mat_add.DepthWrite = false;
+
         mat_backface.FaceCull = Cull.Front;
         mat_backface.Transparency = Transparency.Add;
         mat_backface.DepthTest = DepthTest.LessOrEq;
@@ -67,6 +72,10 @@ static class Arts
         mat_slash.FaceCull = Cull.None;
     }
 
+    // [!] hacky offset stepper for noise
+    public static int offset = 0;
+    static int offstep() => offset += 100;
+
     public static void Frame()
     {
         // Input.HandVisible(Handed.Max, false);
@@ -75,30 +84,46 @@ static class Arts
         Matrix m4_world = Mono.world_pose.ToMatrix();
         Hierarchy.Push(m4_world);
 
-        // mesh test
-        meshes["_dmg"].Draw(
-            mat_mono,
+        // ground
+        meshes["circle"].Draw(
+            mat_unlit,
             Matrix.TRS(
-                V.XYZ(0, 0, -1),
+                V.XYZ(0, 0, 0),
                 Quat.Identity,
-                0.1f
-            )
+                12.0f
+            ),
+            Color.Hex(0x808080FF).ToLinear()
         );
 
         // bamboo
-        for (int i = -12; i <= 12; i++)
+        offset = 0;
+        int s_len = 24;
+        for (int i = -s_len; i <= s_len; i++)
         {
-            float z_offset = Noise.s_scalar_x(i) * 2.0f;
-            float x_offset = Noise.s_scalar_x(i + 32) * 0.2f;
-            float x_wind = Maths.smooth_stop(Maths.u_scalar(SKMath.Sin((i * 0.16f) - Time.Totalf)));
+            Quat q = Quat.FromAngles(0, i * 3, 0);
+            Vec3 pos = q * V.XYZ(0, 0, -10 + (Maths.smooth_stop(Noise.u_scalar_x(i + s_len * 2)) * 5));
+            // float z_offset = Noise.s_scalar_x(i + 32) * 2.0f;
+            float x_offset = Noise.s_scalar_x(i + s_len * 4) * 0.2f;
+            float x_wind = Maths.smooth_stop(Maths.u_scalar(SKMath.Sin((pos.x * 0.5f) - Time.Totalf)));
             Vec3[] p = new Vec3[] {
-                V.XYZ(i * 0.3f, 0, -10 + z_offset),
-                V.XYZ(i * 0.3f, 1, -10 + z_offset),
+                pos + V.XYZ(0, 0, 0),
+                pos + V.XYZ(0, 1, 0),
 
-                V.XYZ(i * 0.3f, 4, -10 + z_offset),
-                V.XYZ(i * 0.3f + x_offset + x_wind, 5, -10 + z_offset),
+                pos + V.XYZ(0, 4, 0),
+                pos + V.XYZ(x_offset + x_wind, 5, 0),
             };
 
+            if (Noise.u_scalar < 0.1f * Time.Stepf)
+            {
+                VFX.Leaf(p[3]);
+                // static float fall_timer = 0.0f;
+                // fall_timer -= Time.Stepf;
+                // if (fall_timer <= 0.0f)
+                // {
+                //     fall_timer = 1.0f;
+                // }
+            }
+
             // debug bezier points
             // for (int i = 0; i < p.Length; i++)
             // {
@@ -123,7 +148,7 @@ static class Arts
             // );
 
             int steps = 92;
-            Vec3 pastPos = p[0];
+            Vec3 pastPoint = p[0];
             float pastThc = 0.0f;
             for (int j = 0; j < steps; j++)
             {
@@ -131,17 +156,39 @@ static class Arts
                 Vec3 a = Vec3.Lerp(p[0], p[1], t);
                 Vec3 b = Vec3.Lerp(p[1], p[2], t);
                 Vec3 c = Vec3.Lerp(p[2], p[3], t);
-                Vec3 pos = Vec3.Lerp(Vec3.Lerp(a, b, t), Vec3.Lerp(b, c, t), t);
+                Vec3 point = Vec3.Lerp(Vec3.Lerp(a, b, t), Vec3.Lerp(b, c, t), t);
                 float thc = (1.0f + Maths.precision((1.0f - t), Maths.lerp(0.1f, 0.2f, Noise.u_scalar_x(i))) * 2.0f) * U.cm * 6.0f;
                 Lines.Add(
-                    pastPos,
-                    pos,
+                    pastPoint,
+                    point,
                     thc != pastThc ? Color.Hex(0x959493FF).ToLinear() : Color.Hex(0xB9E7AFFF).ToLinear(),
                     thc
                 );
-                pastPos = pos;
+                pastPoint = point;
                 pastThc = thc;
             }
+
+            // leaves
+            for (int j = 0; j < 10; j++)
+            {
+                meshes["leaf"].Draw(
+                    mat_unlit,
+                    Matrix.TRS(
+                        p[3] + Quat.LookAt(p[3], p[2], Vec3.Right) * V.XYZ(
+                            Noise.s_scalar_x(j + offstep()),
+                            Noise.s_scalar_x(j + offstep()),
+                            Noise.s_scalar_x(j + offstep()) * 3
+                        ) * 0.2f,
+                        (
+                            Quat.FromAngles(Noise.s_scalar_x(j + offstep()) * 180f, 0, 0) *
+                            Quat.FromAngles(0, Noise.s_scalar_x(j + offstep()) * 180f, 0) *
+                            Quat.FromAngles(0, 0, Noise.s_scalar_x(j + offstep()) * 180f)
+                        ),
+                        0.1f
+                    ),
+                    Color.Hex(0xBAE8B0FF).ToLinear()
+                );
+            }
         }
 
         // unit cube
@@ -234,10 +281,8 @@ static class Arts
                     ),
                     Color.White
                 );
-                if (Rig.btn_select.state)
-                {
-                    VFX.Play(min_hit_pos);
-                }
+                VFX.Play(min_hit_pos);
+                
             }
         }
 
@@ -298,10 +343,9 @@ static class Arts
         }
 
         // particles
-        Particle[] particles = VFX.particles;
-        for (int i = 0; i < particles.Length; i++)
+        for (int i = 0; i < VFX.ps.count; i++)
         {
-            Particle particle = particles[i];
+            Particle particle = VFX.ps.particles[i];
             Mesh.Sphere.Draw(
                 mat_unlit,
                 Matrix.TRS(
@@ -312,6 +356,35 @@ static class Arts
                 Color.Hex(0xC75A09FF).ToLinear()
             );
         }
+        for (int i = 0; i < VFX.leafs.count; i++)
+        {
+            Particle particle = VFX.leafs.particles[i];
+            meshes["leaf"].Draw(
+                mat_unlit,
+                Matrix.TRS(
+                    particle.pos,
+                    particle.ori,
+                    particle.scl
+                ),
+                Color.Hex(0xBAE8B0FF).ToLinear()
+            );
+        }
+        for (int i = 0; i < VFX.ripples.count; i++)
+        {
+            Particle particle = VFX.ripples.particles[i];
+            if (particle.state.state)
+            {
+                meshes["ripple"].Draw(
+                    mat_add,
+                    Matrix.TRS(
+                        particle.pos,
+                        particle.ori,
+                        particle.scl
+                    ),
+                    particle.col.ToLinear()
+                );
+            }
+        }
 
         Hierarchy.Pop();
 

src/Mono.cs

@@ -28,7 +28,7 @@ static class Mono
     public static void Init()
     {
         game_time = 0.0;
-        world_pose = new(0, -1, -2);
+        world_pose = new(0, 0, 0);
         menu = new(false);
         menu_pose = new(0, 0, 0);
         menu_scale = 1 * U.cm;
@@ -60,8 +60,10 @@ static class Mono
         }
 
         // flatscreen dev controls
-        if (Device.Name == "Simulator")
+        if (Device.DisplayType == DisplayType.Flatscreen)// Device.Name == "Simulator")
         {
+            world_pose = new(0, -1, -2);
+
             if (Input.Key(Key.MouseCenter).IsActive())
             {
                 float sx = Input.Mouse.posChange.x;

src/Program.cs

@@ -22,7 +22,8 @@ class Program
             disableFlatscreenMRSim = true,
             renderScaling = 2,
             renderMultisample = 0,
-            // mode = AppMode.Simulator,
+
+            // displayPreference = DisplayMode.Flatscreen
         };
 
         if (!SK.Initialize(settings))

src/Rig.cs

@@ -27,7 +27,7 @@ static class Rig
         head = Input.Head;
 
         // flatscreen dev controls
-        if (Device.Name == "Simulator")
+        if (Device.DisplayType == DisplayType.Flatscreen)// Device.Name == "Simulator")
         {
             btn_select.Step(Input.Key(Key.MouseLeft).IsActive());
             btn_back.Step(Input.Key(Key.MouseRight).IsActive());

src/VFX.cs

@@ -5,23 +5,23 @@ namespace slash;
 
 static class VFX
 {
-    public static Particle[] particles = new Particle[64];
-    static int index = 0;
+    public static ParticleSystem ps = new(64);
+    public static ParticleSystem leafs = new(64);
+    public static ParticleSystem ripples = new(64);
 
     public static void Init()
     {
-        for (int i = 0; i < particles.Length; i++)
-        {
-            particles[i] = new();
-        }
+        ps.Init();
+        leafs.Init();
+        ripples.Init();
     }
 
     public static void Play(Vec3 pos)
     {
         for (int i = 0; i < 8; i++)
         {
-            index = (index + 1) % particles.Length;
-            Particle particle = particles[index];
+            ps.index = (ps.index + 1) % ps.count;
+            Particle particle = ps.particles[ps.index];
             particle.pos = pos;
             particle.vel = Quat.FromAngles(Noise.u_scalar * 360, 0, 0) * Quat.FromAngles(0, Noise.u_scalar * 360, 0) * Vec3.Forward * 3.0f;
             particle.ori = Quat.Identity;
@@ -29,11 +29,33 @@ static class VFX
         }
     }
 
+    public static void Leaf(Vec3 pos)
+    {
+        leafs.index = (leafs.index + 1) % leafs.count;
+        Particle particle = leafs.particles[leafs.index];
+        particle.state.Step(true);
+        particle.pos = pos;
+        particle.vel = V.XYZ(0, 0, 0); // Quat.FromAngles(Noise.u_scalar * 360, 0, 0) * Quat.FromAngles(0, Noise.u_scalar * 360, 0) * Vec3.Forward * 3.0f;
+        particle.ori = Quat.FromAngles(Noise.s_scalar * 180, 0, 0) * Quat.FromAngles(0, Noise.s_scalar * 180, 0);
+        particle.scl = 0.1f; // (1.0f / 3) * Maths.smooth_start(Noise.u_scalar);
+    }
+
+    static void Ripple(Vec3 pos)
+    {
+        ripples.index = (ripples.index + 1) % ripples.count;
+        Particle particle = ripples.particles[ripples.index];
+        particle.state.Step(true);
+        particle.pos = pos;
+        particle.vel = V.XYZ(0, 0, 0); // Quat.FromAngles(Noise.u_scalar * 360, 0, 0) * Quat.FromAngles(0, Noise.u_scalar * 360, 0) * Vec3.Forward * 3.0f;
+        particle.ori = Quat.Identity;
+        particle.scl = 0.1f; // (1.0f / 3) * Maths.smooth_start(Noise.u_scalar);
+    }
+
     public static void Frame()
     {
-        for (int i = 0; i < particles.Length; i++)
+        for (int i = 0; i < ps.count; i++)
         {
-            Particle particle = particles[i];
+            Particle particle = ps.particles[i];
             if (particle.vel.MagnitudeSq > float.Epsilon)
             {
                 particle.pos += particle.vel * Time.Stepf;
@@ -52,20 +74,82 @@ static class VFX
                 // }
             }
         }
+
+        for (int i = 0; i < leafs.count; i++)
+        {
+            Particle particle = leafs.particles[i];
+            particle.state.Step(particle.pos.y > 0);
+            if (particle.state.state)
+            {
+                particle.pos += particle.vel * Time.Stepf;
+                float x_wind = Maths.smooth_stop(Maths.u_scalar(SKMath.Sin((particle.pos.x * 0.5f) - Time.Totalf)));
+                particle.vel.x += x_wind * Time.Stepf;
+                particle.vel += Vec3.Up * -9.81f * 0.1f * Time.Stepf;
+                particle.ori = Quat.LookDir(particle.vel) * Quat.FromAngles(0, 0, 90);
+            }
+            else
+            {
+                particle.pos.y = 0;
+                particle.vel = Vec3.Zero;
+
+                if (particle.state.delta == -1)
+                {
+                    Ripple(particle.pos);
+                }
+            }
+        }
+
+        for (int i = 0; i < ripples.count; i++)
+        {
+            Particle particle = ripples.particles[i];
+            particle.state.Step(particle.scl < 1.0);
+            if (particle.state.state)
+            {
+                particle.scl += Time.Stepf;
+                float val = 1.0f - particle.scl;
+                particle.col = new Color(val, val, val);
+            }
+        }
     }
 }
 
 public class Particle
 {
+    public DeltaBool state;
     public Vec3 pos, vel;
     public Quat ori;
     public float scl;
+    public Color col;
 
     public Particle()
     {
+        this.state = new(false);
         this.pos = Vec3.Zero;
         this.vel = Vec3.Zero;
         this.ori = Quat.Identity;
         this.scl = 0.0f;
+        this.col = Color.White;
+    }
+}
+
+public class ParticleSystem
+{
+    public Particle[] particles;
+    public int count;
+    public int index;
+
+    public ParticleSystem(int count)
+    {
+        this.particles = new Particle[count];
+        this.count = count;
+        this.index = 0;
+    }
+
+    public void Init()
+    {
+        for (int i = 0; i < particles.Length; i++)
+        {
+            particles[i] = new();
+        }
     }
 }