feat(nodes): add rotation to instance node

app/src/lib/result-viewer/Viewer.svelte

@@ -4,7 +4,7 @@
   import { decodeFloat, splitNestedArray } from '@nodarium/utils';
   import type { PerformanceStore } from '@nodarium/utils';
   import { Canvas } from '@threlte/core';
-  import { Vector3 } from 'three';
+  import { DoubleSide, Vector3 } from 'three';
   import { type Group, MeshMatcapMaterial, TextureLoader } from 'three';
   import { createGeometryPool, createInstancedGeometryPool } from './geometryPool';
   import Scene from './Scene.svelte';
@@ -14,7 +14,8 @@
   matcap.colorSpace = 'srgb';
   const material = new MeshMatcapMaterial({
     color: 0xffffff,
-    matcap
+    matcap,
+    side: DoubleSide
   });
 
   let sceneComponent = $state<ReturnType<typeof Scene>>();

app/src/lib/runtime/runtime-executor.ts

@@ -28,7 +28,7 @@ function getValue(input: NodeInput, value?: unknown) {
   }
 
   if (Array.isArray(value)) {
-    if (input.type === 'vec3') {
+    if (input.type === 'vec3' || input.type === 'shape') {
       return [
         0,
         value.length + 1,

nodes/max/plantarium/instance/src/input.json

@@ -28,6 +28,13 @@
       "value": 1,
       "hidden": true
     },
+    "rotation": {
+      "type": "float",
+      "min": 0,
+      "max": 1,
+      "value": 0.5,
+      "hidden": true
+    },
     "depth": {
       "type": "integer",
       "min": 1,

nodes/max/plantarium/instance/src/lib.rs

@@ -1,12 +1,9 @@
 use glam::{Mat4, Quat, Vec3};
-use nodarium_macros::nodarium_execute;
-use nodarium_macros::nodarium_definition_file;
+use nodarium_macros::{nodarium_execute, nodarium_definition_file};
 use nodarium_utils::{
     concat_args, evaluate_float, evaluate_int,
-    geometry::{
-        create_instance_data, wrap_geometry_data, wrap_instance_data, wrap_path,
-    },
-    log, split_args,
+    geometry::{create_instance_data, wrap_geometry_data, wrap_instance_data, wrap_path},
+    split_args,
 };
 
 nodarium_definition_file!("src/input.json");
@@ -15,13 +12,13 @@ nodarium_definition_file!("src/input.json");
 pub fn execute(input: &[i32]) -> Vec<i32> {
     let args = split_args(input);
     let mut inputs = split_args(args[0]);
-    log!("WASM(instance): inputs: {:?}", inputs);
 
     let mut geo_data = args[1].to_vec();
     let geo = wrap_geometry_data(&mut geo_data);
 
     let mut transforms: Vec<Mat4> = Vec::new();
 
+    // Find max depth
     let mut max_depth = 0;
     for path_data in inputs.iter() {
         if path_data[2] != 0 {
@@ -30,7 +27,8 @@ pub fn execute(input: &[i32]) -> Vec<i32> {
         max_depth = max_depth.max(path_data[3]);
     }
 
-    let depth = evaluate_int(args[5]);
+    let rotation = evaluate_float(args[5]);
+    let depth = evaluate_int(args[6]);
 
     for path_data in inputs.iter() {
         if path_data[3] < (max_depth - depth + 1) {
@@ -38,24 +36,34 @@ pub fn execute(input: &[i32]) -> Vec<i32> {
         }
 
         let amount = evaluate_int(args[2]);
-
         let lowest_instance = evaluate_float(args[3]);
         let highest_instance = evaluate_float(args[4]);
 
         let path = wrap_path(path_data);
 
         for i in 0..amount {
-            let alpha =
-                lowest_instance + (i as f32 / amount as f32) * (highest_instance - lowest_instance);
+            let alpha = lowest_instance
+                + (i as f32 / (amount - 1) as f32) * (highest_instance - lowest_instance);
 
             let point = path.get_point_at(alpha);
-            let direction = path.get_direction_at(alpha);
+            let tangent = path.get_direction_at(alpha);
+            let size = point[3] + 0.01;
+
+            let axis_rotation = Quat::from_axis_angle(
+                Vec3::from_slice(&tangent).normalize(),
+                i as f32 * rotation,
+            );
+
+            let path_rotation = Quat::from_rotation_arc(Vec3::Y, Vec3::from_slice(&tangent).normalize());
+
+            let rotation = path_rotation * axis_rotation;
 
             let transform = Mat4::from_scale_rotation_translation(
-                Vec3::new(point[3], point[3], point[3]),
-                Quat::from_xyzw(direction[0], direction[1], direction[2], 1.0).normalize(),
+                Vec3::new(size, size, size),
+                rotation,
                 Vec3::from_slice(&point),
             );
+
             transforms.push(transform);
         }
     }
@@ -67,11 +75,11 @@ pub fn execute(input: &[i32]) -> Vec<i32> {
     );
     let mut instances = wrap_instance_data(&mut instance_data);
     instances.set_geometry(geo);
-    (0..transforms.len()).for_each(|i| {
-        instances.set_transformation_matrix(i, &transforms[i].to_cols_array());
-    });
 
-    log!("WASM(instance): geo: {:?}", instance_data);
+    for (i, transform) in transforms.iter().enumerate() {
+        instances.set_transformation_matrix(i, &transform.to_cols_array());
+    }
+
     inputs.push(&instance_data);
 
     concat_args(inputs)

nodes/max/plantarium/leaf/src/input.json

@@ -11,6 +11,14 @@
     "size": {
       "type": "float",
       "value": 1
+    },
+    "xResolution": {
+      "type": "integer",
+      "description": "The amount of stems to produce",
+      "min": 1,
+      "max": 64,
+      "value": 1,
+      "hidden": true
     }
   }
 }

nodes/max/plantarium/leaf/src/lib.rs

@@ -1,13 +1,166 @@
+use std::convert::TryInto;
+use std::f32::consts::PI;
+
 use nodarium_macros::nodarium_definition_file;
 use nodarium_macros::nodarium_execute;
-use nodarium_utils::{concat_args, log, split_args};
+use nodarium_utils::encode_float;
+use nodarium_utils::evaluate_float;
+use nodarium_utils::evaluate_int;
+use nodarium_utils::log;
+use nodarium_utils::wrap_arg;
+use nodarium_utils::{split_args, decode_float};
 
 nodarium_definition_file!("src/input.json");
 
+fn calculate_y(x: f32) -> f32 {
+    let term1 = (x * PI * 2.0).sin().abs();
+    let term2 = (x * 2.0 * PI + (PI / 2.0)).sin() / 2.0;
+    term1 + term2
+}
+
+// Helper vector math functions
+fn vec_sub(a: &[f32; 3], b: &[f32; 3]) -> [f32; 3] {
+    [a[0] - b[0], a[1] - b[1], a[2] - b[2]]
+}
+
+fn vec_cross(a: &[f32; 3], b: &[f32; 3]) -> [f32; 3] {
+    [
+        a[1] * b[2] - a[2] * b[1],
+        a[2] * b[0] - a[0] * b[2],
+        a[0] * b[1] - a[1] * b[0],
+    ]
+}
+
+fn vec_normalize(v: &[f32; 3]) -> [f32; 3] {
+    let len = (v[0] * v[0] + v[1] * v[1] + v[2] * v[2]).sqrt();
+    if len == 0.0 { [0.0, 0.0, 0.0] } else { [v[0]/len, v[1]/len, v[2]/len] }
+}
+
 #[nodarium_execute]
 pub fn execute(input: &[i32]) -> Vec<i32> {
     let args = split_args(input);
-    log!("leaf input: {:?}", input);
-    log!("leaf args: {:?}", args);
-    concat_args(args)
+    let input_path = split_args(args[0])[0];
+    let size = evaluate_float(args[1]);
+    let width_resolution = evaluate_int(args[2]).max(3) as usize;
+    let path_length = (input_path.len() - 4) / 2;
+
+    let slice_count = path_length;
+    let face_amount = (slice_count - 1) * (width_resolution - 1) * 2;
+    let position_amount = slice_count * width_resolution;
+
+    let out_length = 
+        3  // metadata
+        + face_amount * 3 // indices
+        + position_amount * 3  // positions
+        + position_amount * 3; // normals
+
+    let mut out = vec![0 as i32; out_length];
+
+    log!("face_amount={:?} position_amount={:?}", face_amount, position_amount);
+
+    out[0] = 1;
+    out[1] = position_amount.try_into().unwrap();
+    out[2] = face_amount.try_into().unwrap();
+    let mut offset = 3;
+
+    // Writing Indices
+    let mut idx = 0;
+    for i in 0..(slice_count - 1) {
+        let base0 = (i * width_resolution) as i32;
+        let base1 = ((i + 1) * width_resolution) as i32;
+
+        for j in 0..(width_resolution - 1) {
+            let a = base0 + j as i32;
+            let b = base0 + j as i32 + 1;
+            let c = base1 + j as i32;
+            let d = base1 + j as i32 + 1;
+
+            // triangle 1
+            out[offset + idx + 0] = a;
+            out[offset + idx + 1] = b;
+            out[offset + idx + 2] = c;
+
+            // triangle 2
+            out[offset + idx + 3] = b;
+            out[offset + idx + 4] = d;
+            out[offset + idx + 5] = c;
+
+            idx += 6;
         }
+    }
+
+    offset += face_amount * 3;
+
+    // Writing Positions
+    let width = 50.0;
+    let mut positions = vec![[0.0f32; 3]; position_amount];
+    for i in 0..slice_count {
+        let ax = i as f32 / (slice_count -1) as f32;
+
+        let px = decode_float(input_path[2 + i * 2 + 0]);
+        let pz = decode_float(input_path[2 + i * 2 + 1]);
+
+
+        for j in 0..width_resolution {
+            let alpha = j as f32 / (width_resolution - 1) as f32;
+            let x = 2.0 * (-px * (alpha - 0.5) + alpha * width);
+            let py = calculate_y(alpha-0.5)*5.0*(ax*PI).sin();
+            let pz_val = pz - 100.0;
+
+            let pos_idx = i * width_resolution + j;
+            positions[pos_idx] = [x - width, py, pz_val];
+
+            let flat_idx = offset + pos_idx * 3;
+            out[flat_idx + 0] = encode_float((x - width) * size);
+            out[flat_idx + 1] = encode_float(py * size);
+            out[flat_idx + 2] = encode_float(pz_val * size);
+        }
+    }
+
+    // Writing Normals
+    offset += position_amount * 3;
+    let mut normals = vec![[0.0f32; 3]; position_amount];
+
+    for i in 0..(slice_count - 1) {
+        for j in 0..(width_resolution - 1) {
+            let a = i * width_resolution + j;
+            let b = i * width_resolution + j + 1;
+            let c = (i + 1) * width_resolution + j;
+            let d = (i + 1) * width_resolution + j + 1;
+
+            // triangle 1: a,b,c
+            let u = vec_sub(&positions[b], &positions[a]);
+            let v = vec_sub(&positions[c], &positions[a]);
+            let n1 = vec_cross(&u, &v);
+
+            // triangle 2: b,d,c
+            let u2 = vec_sub(&positions[d], &positions[b]);
+            let v2 = vec_sub(&positions[c], &positions[b]);
+            let n2 = vec_cross(&u2, &v2);
+
+            for &idx in &[a, b, c] {
+                normals[idx][0] += n1[0];
+                normals[idx][1] += n1[1];
+                normals[idx][2] += n1[2];
+            }
+
+            for &idx in &[b, d, c] {
+                normals[idx][0] += n2[0];
+                normals[idx][1] += n2[1];
+                normals[idx][2] += n2[2];
+            }
+        }
+    }
+
+    // normalize and write to output
+    for i in 0..position_amount {
+        let n = vec_normalize(&normals[i]);
+        let flat_idx = offset + i * 3;
+        out[flat_idx + 0] = encode_float(n[0]);
+        out[flat_idx + 1] = encode_float(n[1]);
+        out[flat_idx + 2] = encode_float(n[2]);
+    }
+
+    wrap_arg(&out)
+}
+

packages/ui/src/lib/inputs/InputShape.svelte

@@ -274,6 +274,11 @@
     stroke-width: 1px;
     stroke: var(--color-layer-3);
     fill: var(--color-layer-2);
+    opacity: 0;
+    transition: opacity 0.2s ease;
+  }
+  svg:hover circle {
+    opacity: 1;
   }
   circle.active,
   circle:hover {