modules/geom/impl/curve/curve-tess.js

@@ -19,8 +19,12 @@ export function curveTessParams(curve, min, max, tessTol, scale) {
   splits.push(max);
 
   function refine(u1, u2, step) {
-    if (step <  u2 - u1) {
-      const mid = u1 + (u2 - u1) * 0.5;
+    const uDist = u2 - u1;
+    if (uDist < 1e-3) {
+      return
+    }
+    if (step <  uDist) {
+      const mid = u1 + uDist * 0.5;
       refine(u1, mid, step);
       out.push(mid);
       refine(mid, u2, curveStep(curve, mid, tessTol, scale));

modules/scene/sceneSetup.ts

@@ -84,7 +84,7 @@ export default class SceneSetUp {
     this.createOrthographicCamera();
     this.createPerspectiveCamera();
 
-    this.camera = this.oCamera;
+    this.camera = this.pCamera;
 
     this.light = new DirectionalLight( 0xffffff );
     this.light.position.set( 10, 10, 10 );

modules/voxels/octree.js

@@ -5,6 +5,7 @@ export class Node {
   constructor() {
     this.nodes = null;
     this.tag = 0;
+    this.normal = null;
   }
 
 
@@ -13,15 +14,81 @@ export class Node {
   }
 
   breakDown() {
+    if (this.nodes) {
+      console.error("attempt of breaking down not a leaf node")
+      this.makeLeaf();
+    }
     this.nodes = [new Node(), new Node(), new Node(), new Node(), new Node(), new Node(), new Node(), new Node()];
+    this.nodes.forEach(n => n.tag = this.tag);
+  }
+
+  makeLeaf() {
+    if (this.nodes) {
+      this.nodes.forEach(n => n.dispose());
+      this.nodes = null;
+    }
   }
+
+  dispose() {}
+
 }
 
-const directors = [
+export const directors = [
   [0,0,0], [1,0,0], [0,1,0], [1,1,0],
   [0,0,1], [1,0,1], [0,1,1], [1,1,1]
 ];
 
+export class NDTree {
+
+  constructor(size) {
+    this.root = new Node();
+    this.size = size;
+    if (this.size % 2 !== 0) {
+      throw 'size of nd tree must be power of two'
+    }
+    this.dimension = 3;
+    this.directors = directors;
+    this.nodesCount = Math.pow(2, this.dimension);
+  }
+
+  traverse(handler) {
+    traverseOctree(this.root, this.size, handler);
+  }
+
+  defragment() {
+
+    function defrg(node, x,y,z, size) {
+
+      if (node.leaf) {
+        return;
+      }
+
+      const subSize = size / 2;
+
+      let allChildrenLeafsSameKind = true;
+
+      for (let i = 0; i < 8; i ++) {
+        const subNode = node.nodes[i];
+        if (subNode) {
+          const [dx, dy, dz] = directors[i];
+          defrg(subNode, x + dx*subSize, y + dy*subSize, z + dz*subSize, subSize)
+          if (!subNode.leaf || subNode.tag !== node.tag) {
+            allChildrenLeafsSameKind = false;
+          }
+        }
+      }
+
+      if (allChildrenLeafsSameKind) {
+        node.makeLeaf();
+      }
+
+    }
+
+    defrg(this.root, 0,0,0, this.size);
+  }
+
+}
+
 export function traverseOctree(root, baseSize, handler) {
 
   const stack = [];
@@ -32,7 +99,7 @@ export function traverseOctree(root, baseSize, handler) {
 
     const [node, [x,y,z], size] = stack.pop();
     if (node.leaf) {
-      handler(x, y, z, size, node.tag);
+      handler(x, y, z, size, node.tag, node);
       continue;
     }
     const subSize = size / 2;
@@ -45,12 +112,40 @@ export function traverseOctree(root, baseSize, handler) {
         stack.push([subNode, subLocation, subSize]);
       }
     }
-
   }
+}
+
+export function generateVoxelShape(root, baseSize, classify) {
+  const stack = [];
+
+  stack.push([root, [0,0,0], baseSize]);
+
+  while (stack.length !== 0) {
+
+    const [node, [x,y,z], size] = stack.pop();
+
+    node.size = size; // todo remove, debug
+    node.xyz = [x,y,z]; // todo remove, debug
 
+    node.tag = classify(x, y, z, size);
+
+    if (size === 1 || node.tag !== 'edge') {
+      continue;
+    }
+    node.breakDown();
+
+    const subSize = size / 2;
+
+    for (let i = 0; i < 8; i ++) {
+      const [dx, dy, dz] = directors[i];
+      const subLocation = [x + dx*subSize, y + dy*subSize, z + dz*subSize];
+      const subNode = node.nodes[i];
+      stack.push([subNode, subLocation, subSize]);
+    }
+  }
 }
 
-export function pushVoxel(root, baseSize, [vx, vy, vz], tag) {
+export function pushVoxel(root, baseSize, [vx, vy, vz], tag, normal, semantic) {
   const stack = [];
 
   stack.push([root, [0,0,0], baseSize]);
@@ -61,6 +156,7 @@ export function pushVoxel(root, baseSize, [vx, vy, vz], tag) {
 
     if (size === 1 && x === vx && y === vy && z === vz) {
       node.tag = tag;
+      node.normal = normal;
       return;
     }
     if (size === 1) {
@@ -110,8 +206,8 @@ export function createOctreeFromSurface(origin, sceneSize, treeSize, surface, ta
       const voxel = vec.sub(pMin, origin);
       vec._div(voxel, resolution);
       vec.scalarOperand(voxel, voxel, v => Math.floor(v));
-
-      pushVoxel(root, treeSize, voxel, tag);
+      const normal = surface.normal(uMin, vMin);
+      pushVoxel(root, treeSize, voxel, tag, normal);
     } else {
       const uMid = uMin + (uMax - uMin) / 2;
       const vMid = vMin + (vMax - vMin) / 2;

modules/voxels/vixelViz.ts

@@ -0,0 +1,54 @@
+import {BoxGeometry, Color, Group, Mesh, MeshPhongMaterial} from "three";
+
+const geometry = new BoxGeometry( 1, 1, 1 );
+
+export class Cube extends Group {
+
+  material: MeshPhongMaterial;
+
+  constructor(size=1, colorTag) {
+
+    super();
+
+    let material;
+    if (colorTag) {
+      material = MaterialTable[colorTag];
+    } else {
+      material = MaterialRandomTable[Math.round(Math.random() * 100000) % MaterialRandomTable.length]
+    }
+
+    const mesh = new Mesh(geometry, material);
+    mesh.position.x = 0.5*size;
+    mesh.position.y = 0.5*size;
+    mesh.position.z = 0.5*size;
+    mesh.scale.x = size
+    mesh.scale.y = size
+    mesh.scale.z = size
+
+    this.add(mesh)
+
+  }
+}
+
+const randomInt = (min, max) => {
+  return Math.floor(Math.random() * (max - min + 1)) + min;
+};
+
+const niceColor = () => {
+  const h = randomInt(0, 360);
+  const s = randomInt(42, 98);
+  const l = randomInt(40, 90);
+  return `hsl(${h},${s}%,${l}%)`;
+};
+
+const MaterialRandomTable = [];
+
+for (let i = 0; i < 1000; i ++) {
+  MaterialRandomTable.push(new MeshPhongMaterial( { color: new Color(niceColor())} ));
+}
+
+const MaterialTable = {
+  'inside': new MeshPhongMaterial( { color: 'white'} ),
+  'edge': new MeshPhongMaterial( { color: 0x999999} )
+};
+

modules/voxels/voxelBool.ts

@@ -0,0 +1,139 @@
+import {directors, NDTree} from "voxels/octree";
+
+export function ndTreeSubtract(a: NDTree, b: NDTree) {
+  mergeNDTrees(a, b, 'subtract')
+}
+
+
+function mergeNDTrees(aTree: NDTree, bTree: NDTree, boolSemantic) {
+
+  const stack = [];
+
+  if (aTree.size !== bTree.size) {
+    throw 'unsupported';
+  }
+
+  stack.push([
+    aTree.root,
+    bTree.root,
+    [0,0,0],
+    aTree.size
+  ]);
+
+  let counter = 0;
+  while (stack.length !== 0) {
+    counter ++;
+    const [a, b, [x, y, z], size] = stack.pop();
+
+    if (a.leaf && b.leaf) {
+      if (boolSemantic === 'subtract') {
+        if (b.tag === 'inside' || b.tag === 'edge') {
+          a.tag = 'outside';
+        }
+        //TBD...
+      }
+      continue;
+    }
+
+    if (a.leaf) {
+      a.breakDown();
+    }
+
+    const subSize = size / 2;
+
+    for (let i = 0; i < aTree.nodesCount; i ++) {
+      const [dx, dy, dz] = aTree.directors[i];
+      const subLocation = [x + dx*subSize, y + dy*subSize, z + dz*subSize];
+      const subNode1 = a.nodes[i];
+      const subNode2 = b.leaf ? b : b.nodes[i];
+      stack.push([subNode1, subNode2, subLocation, subSize]);
+    }
+  }
+  console.log("!!!! =",counter)
+
+}
+
+export function ndTreeTransformAndSubtract(a: NDTree, b: NDTree, transformer) {
+  b.traverse((xo, yo, zo, size, tag, node) => {
+
+    const coord = transformer([xo, yo, zo]);
+
+    if (tag !== 'outside') {
+
+      insertNode(a.root, a.size, coord, size, tag, 'subtract');
+
+    }
+
+  });
+
+
+}
+
+function insertNode(targetNode, targetSize, [vx, vy, vz], insertSize, tag, boolSemantic) {
+  if (vx > targetSize || vy > targetSize || vz > targetSize) {
+    return;
+  }
+
+  const stack = [];
+
+  stack.push([targetNode, [0,0,0], targetSize]);
+
+  while (stack.length !== 0) {
+
+    const [node, [x,y,z], size] = stack.pop();
+
+
+    const nodeInside = isInside(x, y, z, size, vx, vy, vz, insertSize);
+    if (nodeInside) {
+      if (boolSemantic === 'subtract') {
+        if (node.tag === 'inside' || node.tag === 'edge') {
+          node.tag = 'outside';
+          node.makeLeaf();
+        }
+        //TBD...
+      }
+      continue;
+    }
+
+    if (size === 1) {
+      continue;
+    }
+
+    if (node.leaf) {
+      node.breakDown();
+    }
+
+    const subSize = size / 2;
+
+    for (let i = 0; i < 8; i ++) {
+      const [dx, dy, dz] = directors[i];
+      const subLocation = [x + dx*subSize, y + dy*subSize, z + dz*subSize];
+      const [sx1, sy1, sz1]  = subLocation;
+      if (nodeInside || overlaps(vx, vy, vz, insertSize, sx1, sy1, sz1, subSize)) {
+        const subNode = node.nodes[i];
+        stack.push([subNode, subLocation, subSize]);
+      }
+    }
+  }
+}
+
+function isInside(tx, ty, tz, tsize,  rx, ry, rz, rsize) {
+
+  return isPtInside(tx, ty, tz, rx, ry, rz, rsize) && isPtInside(tx+tsize, ty+tsize,tz+tsize, rx, ry, rz, rsize)
+
+}
+function overlaps(tx, ty, tz, tsize,  rx, ry, rz, rsize) {
+  return overlap1d(tx, tx + tsize, rx, rx + rsize)
+  * overlap1d(ty, ty + tsize, ry, ry + rsize)
+  * overlap1d(tz, tz + tsize, rz, rz + rsize) > 0;
+}
+
+function isPtInside(x, y, z, rx, ry, rz, size) {
+
+  return (x >= rx) && (y >= ry) && (z >= rz) && (x <= rx + size) && (y <= ry+size) && (z <= rz+size);
+
+}
+
+function overlap1d(min1, max1, min2, max2) {
+  return Math.max(0, Math.min(max1, max2) - Math.max(min1, min2))
+}