summit/frontend/node_modules/three-stdlib/objects/MarchingCubes.js

import { Mesh, BufferGeometry, BufferAttribute, DynamicDrawUsage, Sphere, Vector3, Color } from "three";
class MarchingCubes extends Mesh {
  constructor(resolution, material, enableUvs = false, enableColors = false, maxPolyCount = 1e4) {
    const geometry = new BufferGeometry();
    super(geometry, material);
    this.isMarchingCubes = true;
    const scope = this;
    const vlist = new Float32Array(12 * 3);
    const nlist = new Float32Array(12 * 3);
    const clist = new Float32Array(12 * 3);
    this.enableUvs = enableUvs;
    this.enableColors = enableColors;
    this.init = function(resolution2) {
      this.resolution = resolution2;
      this.isolation = 80;
      this.size = resolution2;
      this.size2 = this.size * this.size;
      this.size3 = this.size2 * this.size;
      this.halfsize = this.size / 2;
      this.delta = 2 / this.size;
      this.yd = this.size;
      this.zd = this.size2;
      this.field = new Float32Array(this.size3);
      this.normal_cache = new Float32Array(this.size3 * 3);
      this.palette = new Float32Array(this.size3 * 3);
      this.count = 0;
      const maxVertexCount = maxPolyCount * 3;
      this.positionArray = new Float32Array(maxVertexCount * 3);
      const positionAttribute = new BufferAttribute(this.positionArray, 3);
      positionAttribute.setUsage(DynamicDrawUsage);
      geometry.setAttribute("position", positionAttribute);
      this.normalArray = new Float32Array(maxVertexCount * 3);
      const normalAttribute = new BufferAttribute(this.normalArray, 3);
      normalAttribute.setUsage(DynamicDrawUsage);
      geometry.setAttribute("normal", normalAttribute);
      if (this.enableUvs) {
        this.uvArray = new Float32Array(maxVertexCount * 2);
        const uvAttribute = new BufferAttribute(this.uvArray, 2);
        uvAttribute.setUsage(DynamicDrawUsage);
        geometry.setAttribute("uv", uvAttribute);
      }
      if (this.enableColors) {
        this.colorArray = new Float32Array(maxVertexCount * 3);
        const colorAttribute = new BufferAttribute(this.colorArray, 3);
        colorAttribute.setUsage(DynamicDrawUsage);
        geometry.setAttribute("color", colorAttribute);
      }
      geometry.boundingSphere = new Sphere(new Vector3(), 1);
    };
    function lerp(a, b, t) {
      return a + (b - a) * t;
    }
    function VIntX(q, offset, isol, x, y, z, valp1, valp2, c_offset1, c_offset2) {
      const mu = (isol - valp1) / (valp2 - valp1), nc = scope.normal_cache;
      vlist[offset + 0] = x + mu * scope.delta;
      vlist[offset + 1] = y;
      vlist[offset + 2] = z;
      nlist[offset + 0] = lerp(nc[q + 0], nc[q + 3], mu);
      nlist[offset + 1] = lerp(nc[q + 1], nc[q + 4], mu);
      nlist[offset + 2] = lerp(nc[q + 2], nc[q + 5], mu);
      clist[offset + 0] = lerp(scope.palette[c_offset1 * 3 + 0], scope.palette[c_offset2 * 3 + 0], mu);
      clist[offset + 1] = lerp(scope.palette[c_offset1 * 3 + 1], scope.palette[c_offset2 * 3 + 1], mu);
      clist[offset + 2] = lerp(scope.palette[c_offset1 * 3 + 2], scope.palette[c_offset2 * 3 + 2], mu);
    }
    function VIntY(q, offset, isol, x, y, z, valp1, valp2, c_offset1, c_offset2) {
      const mu = (isol - valp1) / (valp2 - valp1), nc = scope.normal_cache;
      vlist[offset + 0] = x;
      vlist[offset + 1] = y + mu * scope.delta;
      vlist[offset + 2] = z;
      const q2 = q + scope.yd * 3;
      nlist[offset + 0] = lerp(nc[q + 0], nc[q2 + 0], mu);
      nlist[offset + 1] = lerp(nc[q + 1], nc[q2 + 1], mu);
      nlist[offset + 2] = lerp(nc[q + 2], nc[q2 + 2], mu);
      clist[offset + 0] = lerp(scope.palette[c_offset1 * 3 + 0], scope.palette[c_offset2 * 3 + 0], mu);
      clist[offset + 1] = lerp(scope.palette[c_offset1 * 3 + 1], scope.palette[c_offset2 * 3 + 1], mu);
      clist[offset + 2] = lerp(scope.palette[c_offset1 * 3 + 2], scope.palette[c_offset2 * 3 + 2], mu);
    }
    function VIntZ(q, offset, isol, x, y, z, valp1, valp2, c_offset1, c_offset2) {
      const mu = (isol - valp1) / (valp2 - valp1), nc = scope.normal_cache;
      vlist[offset + 0] = x;
      vlist[offset + 1] = y;
      vlist[offset + 2] = z + mu * scope.delta;
      const q2 = q + scope.zd * 3;
      nlist[offset + 0] = lerp(nc[q + 0], nc[q2 + 0], mu);
      nlist[offset + 1] = lerp(nc[q + 1], nc[q2 + 1], mu);
      nlist[offset + 2] = lerp(nc[q + 2], nc[q2 + 2], mu);
      clist[offset + 0] = lerp(scope.palette[c_offset1 * 3 + 0], scope.palette[c_offset2 * 3 + 0], mu);
      clist[offset + 1] = lerp(scope.palette[c_offset1 * 3 + 1], scope.palette[c_offset2 * 3 + 1], mu);
      clist[offset + 2] = lerp(scope.palette[c_offset1 * 3 + 2], scope.palette[c_offset2 * 3 + 2], mu);
    }
    function compNorm(q) {
      const q3 = q * 3;
      if (scope.normal_cache[q3] === 0) {
        scope.normal_cache[q3 + 0] = scope.field[q - 1] - scope.field[q + 1];
        scope.normal_cache[q3 + 1] = scope.field[q - scope.yd] - scope.field[q + scope.yd];
        scope.normal_cache[q3 + 2] = scope.field[q - scope.zd] - scope.field[q + scope.zd];
      }
    }
    function polygonize(fx, fy, fz, q, isol) {
      const q1 = q + 1, qy = q + scope.yd, qz = q + scope.zd, q1y = q1 + scope.yd, q1z = q1 + scope.zd, qyz = q + scope.yd + scope.zd, q1yz = q1 + scope.yd + scope.zd;
      let cubeindex = 0;
      const field0 = scope.field[q], field1 = scope.field[q1], field2 = scope.field[qy], field3 = scope.field[q1y], field4 = scope.field[qz], field5 = scope.field[q1z], field6 = scope.field[qyz], field7 = scope.field[q1yz];
      if (field0 < isol)
        cubeindex |= 1;
      if (field1 < isol)
        cubeindex |= 2;
      if (field2 < isol)
        cubeindex |= 8;
      if (field3 < isol)
        cubeindex |= 4;
      if (field4 < isol)
        cubeindex |= 16;
      if (field5 < isol)
        cubeindex |= 32;
      if (field6 < isol)
        cubeindex |= 128;
      if (field7 < isol)
        cubeindex |= 64;
      const bits = edgeTable[cubeindex];
      if (bits === 0)
        return 0;
      const d = scope.delta, fx2 = fx + d, fy2 = fy + d, fz2 = fz + d;
      if (bits & 1) {
        compNorm(q);
        compNorm(q1);
        VIntX(q * 3, 0, isol, fx, fy, fz, field0, field1, q, q1);
      }
      if (bits & 2) {
        compNorm(q1);
        compNorm(q1y);
        VIntY(q1 * 3, 3, isol, fx2, fy, fz, field1, field3, q1, q1y);
      }
      if (bits & 4) {
        compNorm(qy);
        compNorm(q1y);
        VIntX(qy * 3, 6, isol, fx, fy2, fz, field2, field3, qy, q1y);
      }
      if (bits & 8) {
        compNorm(q);
        compNorm(qy);
        VIntY(q * 3, 9, isol, fx, fy, fz, field0, field2, q, qy);
      }
      if (bits & 16) {
        compNorm(qz);
        compNorm(q1z);
        VIntX(qz * 3, 12, isol, fx, fy, fz2, field4, field5, qz, q1z);
      }
      if (bits & 32) {
        compNorm(q1z);
        compNorm(q1yz);
        VIntY(q1z * 3, 15, isol, fx2, fy, fz2, field5, field7, q1z, q1yz);
      }
      if (bits & 64) {
        compNorm(qyz);
        compNorm(q1yz);
        VIntX(qyz * 3, 18, isol, fx, fy2, fz2, field6, field7, qyz, q1yz);
      }
      if (bits & 128) {
        compNorm(qz);
        compNorm(qyz);
        VIntY(qz * 3, 21, isol, fx, fy, fz2, field4, field6, qz, qyz);
      }
      if (bits & 256) {
        compNorm(q);
        compNorm(qz);
        VIntZ(q * 3, 24, isol, fx, fy, fz, field0, field4, q, qz);
      }
      if (bits & 512) {
        compNorm(q1);
        compNorm(q1z);
        VIntZ(q1 * 3, 27, isol, fx2, fy, fz, field1, field5, q1, q1z);
      }
      if (bits & 1024) {
        compNorm(q1y);
        compNorm(q1yz);
        VIntZ(q1y * 3, 30, isol, fx2, fy2, fz, field3, field7, q1y, q1yz);
      }
      if (bits & 2048) {
        compNorm(qy);
        compNorm(qyz);
        VIntZ(qy * 3, 33, isol, fx, fy2, fz, field2, field6, qy, qyz);
      }
      cubeindex <<= 4;
      let o1, o2, o3, numtris = 0, i = 0;
      while (triTable[cubeindex + i] != -1) {
        o1 = cubeindex + i;
        o2 = o1 + 1;
        o3 = o1 + 2;
        posnormtriv(vlist, nlist, clist, 3 * triTable[o1], 3 * triTable[o2], 3 * triTable[o3]);
        i += 3;
        numtris++;
      }
      return numtris;
    }
    function posnormtriv(pos, norm, colors, o1, o2, o3) {
      const c = scope.count * 3;
      scope.positionArray[c + 0] = pos[o1];
      scope.positionArray[c + 1] = pos[o1 + 1];
      scope.positionArray[c + 2] = pos[o1 + 2];
      scope.positionArray[c + 3] = pos[o2];
      scope.positionArray[c + 4] = pos[o2 + 1];
      scope.positionArray[c + 5] = pos[o2 + 2];
      scope.positionArray[c + 6] = pos[o3];
      scope.positionArray[c + 7] = pos[o3 + 1];
      scope.positionArray[c + 8] = pos[o3 + 2];
      if (scope.material.flatShading === true) {
        const nx = (norm[o1 + 0] + norm[o2 + 0] + norm[o3 + 0]) / 3;
        const ny = (norm[o1 + 1] + norm[o2 + 1] + norm[o3 + 1]) / 3;
        const nz = (norm[o1 + 2] + norm[o2 + 2] + norm[o3 + 2]) / 3;
        scope.normalArray[c + 0] = nx;
        scope.normalArray[c + 1] = ny;
        scope.normalArray[c + 2] = nz;
        scope.normalArray[c + 3] = nx;
        scope.normalArray[c + 4] = ny;
        scope.normalArray[c + 5] = nz;
        scope.normalArray[c + 6] = nx;
        scope.normalArray[c + 7] = ny;
        scope.normalArray[c + 8] = nz;
      } else {
        scope.normalArray[c + 0] = norm[o1 + 0];
        scope.normalArray[c + 1] = norm[o1 + 1];
        scope.normalArray[c + 2] = norm[o1 + 2];
        scope.normalArray[c + 3] = norm[o2 + 0];
        scope.normalArray[c + 4] = norm[o2 + 1];
        scope.normalArray[c + 5] = norm[o2 + 2];
        scope.normalArray[c + 6] = norm[o3 + 0];
        scope.normalArray[c + 7] = norm[o3 + 1];
        scope.normalArray[c + 8] = norm[o3 + 2];
      }
      if (scope.enableUvs) {
        const d = scope.count * 2;
        scope.uvArray[d + 0] = pos[o1 + 0];
        scope.uvArray[d + 1] = pos[o1 + 2];
        scope.uvArray[d + 2] = pos[o2 + 0];
        scope.uvArray[d + 3] = pos[o2 + 2];
        scope.uvArray[d + 4] = pos[o3 + 0];
        scope.uvArray[d + 5] = pos[o3 + 2];
      }
      if (scope.enableColors) {
        scope.colorArray[c + 0] = colors[o1 + 0];
        scope.colorArray[c + 1] = colors[o1 + 1];
        scope.colorArray[c + 2] = colors[o1 + 2];
        scope.colorArray[c + 3] = colors[o2 + 0];
        scope.colorArray[c + 4] = colors[o2 + 1];
        scope.colorArray[c + 5] = colors[o2 + 2];
        scope.colorArray[c + 6] = colors[o3 + 0];
        scope.colorArray[c + 7] = colors[o3 + 1];
        scope.colorArray[c + 8] = colors[o3 + 2];
      }
      scope.count += 3;
    }
    this.addBall = function(ballx, bally, ballz, strength, subtract, colors) {
      const sign = Math.sign(strength);
      strength = Math.abs(strength);
      const userDefineColor = !(colors === void 0 || colors === null);
      let ballColor = new Color(ballx, bally, ballz);
      if (userDefineColor) {
        try {
          ballColor = colors instanceof Color ? colors : Array.isArray(colors) ? new Color(
            Math.min(Math.abs(colors[0]), 1),
            Math.min(Math.abs(colors[1]), 1),
            Math.min(Math.abs(colors[2]), 1)
          ) : new Color(colors);
        } catch (err) {
          ballColor = new Color(ballx, bally, ballz);
        }
      }
      const radius = this.size * Math.sqrt(strength / subtract), zs = ballz * this.size, ys = bally * this.size, xs = ballx * this.size;
      let min_z = Math.floor(zs - radius);
      if (min_z < 1)
        min_z = 1;
      let max_z = Math.floor(zs + radius);
      if (max_z > this.size - 1)
        max_z = this.size - 1;
      let min_y = Math.floor(ys - radius);
      if (min_y < 1)
        min_y = 1;
      let max_y = Math.floor(ys + radius);
      if (max_y > this.size - 1)
        max_y = this.size - 1;
      let min_x = Math.floor(xs - radius);
      if (min_x < 1)
        min_x = 1;
      let max_x = Math.floor(xs + radius);
      if (max_x > this.size - 1)
        max_x = this.size - 1;
      let x, y, z, y_offset, z_offset, fx, fy, fz, fz2, fy2, val;
      for (z = min_z; z < max_z; z++) {
        z_offset = this.size2 * z;
        fz = z / this.size - ballz;
        fz2 = fz * fz;
        for (y = min_y; y < max_y; y++) {
          y_offset = z_offset + this.size * y;
          fy = y / this.size - bally;
          fy2 = fy * fy;
          for (x = min_x; x < max_x; x++) {
            fx = x / this.size - ballx;
            val = strength / (1e-6 + fx * fx + fy2 + fz2) - subtract;
            if (val > 0) {
              this.field[y_offset + x] += val * sign;
              const ratio = Math.sqrt((x - xs) * (x - xs) + (y - ys) * (y - ys) + (z - zs) * (z - zs)) / radius;
              const contrib = 1 - ratio * ratio * ratio * (ratio * (ratio * 6 - 15) + 10);
              this.palette[(y_offset + x) * 3 + 0] += ballColor.r * contrib;
              this.palette[(y_offset + x) * 3 + 1] += ballColor.g * contrib;
              this.palette[(y_offset + x) * 3 + 2] += ballColor.b * contrib;
            }
          }
        }
      }
    };
    this.addPlaneX = function(strength, subtract) {
      const size = this.size, yd = this.yd, zd = this.zd, field = this.field;
      let x, y, z, xx, val, xdiv, cxy, dist = size * Math.sqrt(strength / subtract);
      if (dist > size)
        dist = size;
      for (x = 0; x < dist; x++) {
        xdiv = x / size;
        xx = xdiv * xdiv;
        val = strength / (1e-4 + xx) - subtract;
        if (val > 0) {
          for (y = 0; y < size; y++) {
            cxy = x + y * yd;
            for (z = 0; z < size; z++) {
              field[zd * z + cxy] += val;
            }
          }
        }
      }
    };
    this.addPlaneY = function(strength, subtract) {
      const size = this.size, yd = this.yd, zd = this.zd, field = this.field;
      let x, y, z, yy, val, ydiv, cy, cxy, dist = size * Math.sqrt(strength / subtract);
      if (dist > size)
        dist = size;
      for (y = 0; y < dist; y++) {
        ydiv = y / size;
        yy = ydiv * ydiv;
        val = strength / (1e-4 + yy) - subtract;
        if (val > 0) {
          cy = y * yd;
          for (x = 0; x < size; x++) {
            cxy = cy + x;
            for (z = 0; z < size; z++)
              field[zd * z + cxy] += val;
          }
        }
      }
    };
    this.addPlaneZ = function(strength, subtract) {
      const size = this.size, yd = this.yd, zd = this.zd, field = this.field;
      let x, y, z, zz, val, zdiv, cz, cyz, dist = size * Math.sqrt(strength / subtract);
      if (dist > size)
        dist = size;
      for (z = 0; z < dist; z++) {
        zdiv = z / size;
        zz = zdiv * zdiv;
        val = strength / (1e-4 + zz) - subtract;
        if (val > 0) {
          cz = zd * z;
          for (y = 0; y < size; y++) {
            cyz = cz + y * yd;
            for (x = 0; x < size; x++)
              field[cyz + x] += val;
          }
        }
      }
    };
    this.setCell = function(x, y, z, value) {
      const index = this.size2 * z + this.size * y + x;
      this.field[index] = value;
    };
    this.getCell = function(x, y, z) {
      const index = this.size2 * z + this.size * y + x;
      return this.field[index];
    };
    this.blur = function(intensity = 1) {
      const field = this.field;
      const fieldCopy = field.slice();
      const size = this.size;
      const size2 = this.size2;
      for (let x = 0; x < size; x++) {
        for (let y = 0; y < size; y++) {
          for (let z = 0; z < size; z++) {
            const index = size2 * z + size * y + x;
            let val = fieldCopy[index];
            let count = 1;
            for (let x2 = -1; x2 <= 1; x2 += 2) {
              const x3 = x2 + x;
              if (x3 < 0 || x3 >= size)
                continue;
              for (let y2 = -1; y2 <= 1; y2 += 2) {
                const y3 = y2 + y;
                if (y3 < 0 || y3 >= size)
                  continue;
                for (let z2 = -1; z2 <= 1; z2 += 2) {
                  const z3 = z2 + z;
                  if (z3 < 0 || z3 >= size)
                    continue;
                  const index2 = size2 * z3 + size * y3 + x3;
                  const val2 = fieldCopy[index2];
                  count++;
                  val += intensity * (val2 - val) / count;
                }
              }
            }
            field[index] = val;
          }
        }
      }
    };
    this.reset = function() {
      for (let i = 0; i < this.size3; i++) {
        this.normal_cache[i * 3] = 0;
        this.field[i] = 0;
        this.palette[i * 3] = this.palette[i * 3 + 1] = this.palette[i * 3 + 2] = 0;
      }
    };
    this.update = function() {
      this.count = 0;
      const smin2 = this.size - 2;
      for (let z = 1; z < smin2; z++) {
        const z_offset = this.size2 * z;
        const fz = (z - this.halfsize) / this.halfsize;
        for (let y = 1; y < smin2; y++) {
          const y_offset = z_offset + this.size * y;
          const fy = (y - this.halfsize) / this.halfsize;
          for (let x = 1; x < smin2; x++) {
            const fx = (x - this.halfsize) / this.halfsize;
            const q = y_offset + x;
            polygonize(fx, fy, fz, q, this.isolation);
          }
        }
      }
      this.geometry.setDrawRange(0, this.count);
      geometry.getAttribute("position").needsUpdate = true;
      geometry.getAttribute("normal").needsUpdate = true;
      if (this.enableUvs)
        geometry.getAttribute("uv").needsUpdate = true;
      if (this.enableColors)
        geometry.getAttribute("color").needsUpdate = true;
      if (this.count / 3 > maxPolyCount)
        console.warn(
          "THREE.MarchingCubes: Geometry buffers too small for rendering. Please create an instance with a higher poly count."
        );
    };
    this.init(resolution);
  }
}
const edgeTable = new Int32Array([
  0,
  265,
  515,
  778,
  1030,
  1295,
  1541,
  1804,
  2060,
  2309,
  2575,
  2822,
  3082,
  3331,
  3593,
  3840,
  400,
  153,
  915,
  666,
  1430,
  1183,
  1941,
  1692,
  2460,
  2197,
  2975,
  2710,
  3482,
  3219,
  3993,
  3728,
  560,
  825,
  51,
  314,
  1590,
  1855,
  1077,
  1340,
  2620,
  2869,
  2111,
  2358,
  3642,
  3891,
  3129,
  3376,
  928,
  681,
  419,
  170,
  1958,
  1711,
  1445,
  1196,
  2988,
  2725,
  2479,
  2214,
  4010,
  3747,
  3497,
  3232,
  1120,
  1385,
  1635,
  1898,
  102,
  367,
  613,
  876,
  3180,
  3429,
  3695,
  3942,
  2154,
  2403,
  2665,
  2912,
  1520,
  1273,
  2035,
  1786,
  502,
  255,
  1013,
  764,
  3580,
  3317,
  4095,
  3830,
  2554,
  2291,
  3065,
  2800,
  1616,
  1881,
  1107,
  1370,
  598,
  863,
  85,
  348,
  3676,
  3925,
  3167,
  3414,
  2650,
  2899,
  2137,
  2384,
  1984,
  1737,
  1475,
  1226,
  966,
  719,
  453,
  204,
  4044,
  3781,
  3535,
  3270,
  3018,
  2755,
  2505,
  2240,
  2240,
  2505,
  2755,
  3018,
  3270,
  3535,
  3781,
  4044,
  204,
  453,
  719,
  966,
  1226,
  1475,
  1737,
  1984,
  2384,
  2137,
  2899,
  2650,
  3414,
  3167,
  3925,
  3676,
  348,
  85,
  863,
  598,
  1370,
  1107,
  1881,
  1616,
  2800,
  3065,
  2291,
  2554,
  3830,
  4095,
  3317,
  3580,
  764,
  1013,
  255,
  502,
  1786,
  2035,
  1273,
  1520,
  2912,
  2665,
  2403,
  2154,
  3942,
  3695,
  3429,
  3180,
  876,
  613,
  367,
  102,
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export {
  MarchingCubes,
  edgeTable,
  triTable
};
//# sourceMappingURL=MarchingCubes.js.map