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cut.cc
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#include "cut.h"
#include <vector>
#include <cmath>
float planeNormalX = 1;
float planeNormalY = 0;
float planeNormalZ = 0;
float planeConstant = 0;
unsigned int getVertexIndex(int faceIdx, int vert, unsigned int *indices) {
// vert = 0, 1 or 2.
int idx = faceIdx * 3 + vert;
// return indices ? indices[idx] : idx;
return indices[idx];
}
// https://stackoverflow.com/a/4609795/3596736
template <typename T> int sgn(T val) {
return (T(0) < val) - (val < T(0));
}
// vector3
float dot( float ax, float ay, float az, float bx, float by, float bz ) {
return ax * bx + ay * by + az * bz;
}
// vector3
float lengthSq( float x, float y, float z ) {
return x * x + y * y + z * z;
}
// plane
float distanceToPoint( float x, float y, float z ) {
// return this.normal.dot( point ) + this.constant;
return dot( planeNormalX, planeNormalY, planeNormalZ, x, y, z ) + planeConstant;
}
// plane
void intersectLine(
float *targetX, float *targetY, float *targetZ,
float lineStartX, float lineStartY, float lineStartZ,
float lineEndX, float lineEndY, float lineEndZ
) {
float directionX = lineEndX - lineStartX;
float directionY = lineEndY - lineStartY;
float directionZ = lineEndZ - lineStartZ;
float denominator = dot( planeNormalX, planeNormalY, planeNormalZ, directionX, directionY, directionZ );
if ( denominator == 0 ) {
// line is coplanar, return origin
// if ( this.distanceToPoint( line.start ) === 0 ) {
if ( distanceToPoint( lineStartX, lineStartY, lineStartZ ) == 0) {
// return target.copy( line.start );
*targetX = lineStartX;
*targetY = lineStartY;
*targetZ = lineStartZ;
return;
}
}
// const t = - ( line.start.dot( this.normal ) + this.constant ) / denominator;
float t = - ( dot(lineStartX, lineStartY, lineStartZ, planeNormalX, planeNormalY, planeNormalZ) + planeConstant ) / denominator;
if ( t < 0 || t > 1 ) {
return;
}
// return target.copy( direction ).multiplyScalar( t ).add( line.start );
*targetX = directionX * t + lineStartX;
*targetY = directionY * t + lineStartY;
*targetZ = directionZ * t + lineStartZ;
return;
}
void getIntersectNode(
float *vIX, float *vIY, float *vIZ,
float *nIX, float *nIY, float *nIZ,
float *uIX, float *uIY,
float v0X, float v0Y, float v0Z,
float v1X, float v1Y, float v1Z,
float n0X, float n0Y, float n0Z,
float n1X, float n1Y, float n1Z,
float u0X, float u0Y,
float u1X, float u1Y
// v0, v1, n0, n1, u0, u1
) {
// this.tempLine1.start.copy(v0)
// this.tempLine1.end.copy(v1)
// let vI = new THREE.Vector3()
// vI = this.localPlane.intersectLine(this.tempLine1, vI)
intersectLine(
vIX, vIY, vIZ,
v0X, v0Y, v0Z,
v1X, v1Y, v1Z
);
// let total = this.tempVector3.subVectors(v1, v0).lengthSq()
float total = lengthSq( v1X-v0X, v1Y-v0Y, v1Z-v0Z );
// let part = this.tempVector3.subVectors(vI, v0).lengthSq()
float part = lengthSq( *vIX-v0X, *vIY-v0Y, *vIZ-v0Z );
// let ratio = Math.sqrt(part / total)
float ratio = std::sqrt( part / total );
// let normalPart = this.tempVector3.subVectors(n1, n0).multiplyScalar(ratio)
float normalPartX = ( n1X - n0X ) * ratio;
float normalPartY = ( n1Y - n0Y ) * ratio;
float normalPartZ = ( n1Z - n0Z ) * ratio;
// let nI = new THREE.Vector3().copy(n0).add(normalPart)
*nIX = n0X + normalPartX;
*nIY = n0Y + normalPartY;
*nIZ = n0Z + normalPartZ;
// let uvPart = this.tempVector2.subVectors(u1, u0).multiplyScalar(ratio)
float uvPartX = ( u1X - u0X ) * ratio;
float uvPartY = ( u1Y - u0Y ) * ratio;
// let uI = new THREE.Vector2().copy(u0).add(uvPart)
*uIX = u0X + uvPartX;
*uIY = u0Y + uvPartY;
// return { vI, nI, uI }
}
float *cut(
float *positions,
unsigned int numPositions,
float *normals,
unsigned int numNormals,
float *uvs,
unsigned int numUvs,
unsigned int *faces,
unsigned int numFaces,
float *planeNormal,
float planeDistance
) {
planeNormalX = planeNormal[0];
planeNormalY = planeNormal[1];
planeNormalZ = planeNormal[2];
planeConstant = planeDistance;
unsigned int *indices = faces;
float *coords = positions;
unsigned int pointsCount = numPositions / 3;
unsigned int facesCount;
if (faces != nullptr) {
facesCount = numFaces / 3;
} else {
facesCount = numPositions / 3 / 3;
}
std::vector<float> points1;
std::vector<float> points2;
std::vector<float> normals1;
std::vector<float> normals2;
std::vector<float> uvs1;
std::vector<float> uvs2;
for(int i=0;i<facesCount;i++){
unsigned int va;
unsigned int vb;
unsigned int vc;
if (faces != nullptr) {
va = getVertexIndex(i, 0, indices);
vb = getVertexIndex(i, 1, indices);
vc = getVertexIndex(i, 2, indices);
} else {
va = 3 * i + 0;
vb = 3 * i + 1;
vc = 3 * i + 2;
}
float v0X = coords[3 * va];
float v1X = coords[3 * vb];
float v2X = coords[3 * vc];
float v0Y = coords[3 * va + 1];
float v1Y = coords[3 * vb + 1];
float v2Y = coords[3 * vc + 1];
float v0Z = coords[3 * va + 2];
float v1Z = coords[3 * vb + 2];
float v2Z = coords[3 * vc + 2];
float n0X = normals[3 * va];
float n1X = normals[3 * vb];
float n2X = normals[3 * vc];
float n0Y = normals[3 * va + 1];
float n1Y = normals[3 * vb + 1];
float n2Y = normals[3 * vc + 1];
float n0Z = normals[3 * va + 2];
float n1Z = normals[3 * vb + 2];
float n2Z = normals[3 * vc + 2];
float u0X = uvs[2 * va];
float u1X = uvs[2 * vb];
float u2X = uvs[2 * vc];
float u0Y = uvs[2 * va + 1];
float u1Y = uvs[2 * vb + 1];
float u2Y = uvs[2 * vc + 1];
float d0 = distanceToPoint(v0X, v0Y, v0Z);
float d1 = distanceToPoint(v1X, v1Y, v1Z);
float d2 = distanceToPoint(v2X, v2Y, v2Z);
int sign0 = sgn(d0);
int sign1 = sgn(d1);
int sign2 = sgn(d2);
if (sign0 == sign1 && sign1 == sign2 && sign2 == sign0) {
if (sign0 == -1) {
// points1.push(v0, v1, v2)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
// normals1.push_back(n0, n1, n2)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
// uvs1.push_back(u0, u1, u2)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
} else if (sign0 == 1) {
// points2.push(v0, v1, v2)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(v2X);
points2.push_back(v2Y);
points2.push_back(v2Z);
// normals2.push_back(n0, n1, n2)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(n2X);
normals2.push_back(n2Y);
normals2.push_back(n2Z);
// uvs2.push_back(u0, u1, u2)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(u2X);
uvs2.push_back(u2Y);
}
} else if (sign0 == sign1) {
if (sign0 == -1) {
if (sign2 == 1) {
// let { vI: vI0, nI: nI0, uI: uI0 } = getIntersectNode(v0, v2, n0, n1, u0, u2)
float vI0X, vI0Y, vI0Z, nI0X, nI0Y, nI0Z, uI0X, uI0Y;
getIntersectNode(
&vI0X, &vI0Y, &vI0Z, &nI0X, &nI0Y, &nI0Z, &uI0X, &uI0Y,
v0X, v0Y, v0Z,
v2X, v2Y, v2Z,
n0X, n0Y, n0Z,
n1X, n1Y, n1Z,
u0X, u0Y,
u2X, u2Y
);
// let { vI: vI1, nI: nI1, uI: uI1 } = getIntersectNode(v1, v2, n1, n2, u1, u2)
float vI1X, vI1Y, vI1Z, nI1X, nI1Y, nI1Z, uI1X, uI1Y;
getIntersectNode(
&vI1X, &vI1Y, &vI1Z, &nI1X, &nI1Y, &nI1Z, &uI1X, &uI1Y,
v1X, v1Y, v1Z,
v2X, v2Y, v2Z,
n1X, n1Y, n1Z,
n2X, n2Y, n2Z,
u1X, u1Y,
u2X, u2Y
);
// points1.push(v0, vI1, vI0)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);
points1.push_back(vI1Z);
points1.push_back(vI0X);
points1.push_back(vI0Y);
points1.push_back(vI0Z);
// normals1.push(n0, nI1, nI0)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(nI1X);
normals1.push_back(nI1Y);
normals1.push_back(nI1Z);
normals1.push_back(nI0X);
normals1.push_back(nI0Y);
normals1.push_back(nI0Z);
// uvs1.push(u0, uI1, uI0)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(uI1X);
uvs1.push_back(uI1Y);
uvs1.push_back(uI0X);
uvs1.push_back(uI0Y);
// points1.push(v0, v1, vI1)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);
points1.push_back(vI1Z);
// normals1.push(n0, n1, nI1)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(nI1X);
normals1.push_back(nI1Y);
normals1.push_back(nI1Z);
// uvs1.push(u0, u1, uI1)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(uI1X);
uvs1.push_back(uI1Y);
// points2.push(v2, vI0, vI1)
points2.push_back(v2X);
points2.push_back(v2Y);
points2.push_back(v2Z);
points2.push_back(vI0X);
points2.push_back(vI0Y);
points2.push_back(vI0Z);
points2.push_back(vI1X);
points2.push_back(vI1Y);
points2.push_back(vI1Z);
// normals2.push(n2, nI0, nI1)
normals2.push_back(n2X);
normals2.push_back(n2Y);
normals2.push_back(n2Z);
normals2.push_back(nI0X);
normals2.push_back(nI0Y);
normals2.push_back(nI0Z);
normals2.push_back(nI1X);
normals2.push_back(nI1Y);
normals2.push_back(nI1Z);
// uvs2.push(u2, uI0, uI1)
uvs2.push_back(u2X);
uvs2.push_back(u2Y);
uvs2.push_back(uI0X);
uvs2.push_back(uI0Y);
uvs2.push_back(uI1X);
uvs2.push_back(uI1Y);
} else if (sign2 == 0) {
// points1.push(v0, v1, v2)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
// normals1.push(n0, n1, n2)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
// uvs1.push(u0, u1, u2)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
}
} else if (sign0 == 1) {
if (sign2 == -1) {
// let { vI: vI0, nI: nI0, uI: uI0 } = getIntersectNode(v0, v2, n0, n2, u0, u2)
float vI0X, vI0Y, vI0Z, nI0X, nI0Y, nI0Z, uI0X, uI0Y;
getIntersectNode(
&vI0X, &vI0Y, &vI0Z, &nI0X, &nI0Y, &nI0Z, &uI0X, &uI0Y,
v0X, v0Y, v0Z,
v2X, v2Y, v2Z,
n0X, n0Y, n0Z,
n2X, n2Y, n2Z,
u0X, u0Y,
u2X, u2Y
);
// let { vI: vI1, nI: nI1, uI: uI1 } = getIntersectNode(v1, v2, n1, n2, u1, u2)
float vI1X, vI1Y, vI1Z, nI1X, nI1Y, nI1Z, uI1X, uI1Y;
getIntersectNode(
&vI1X, &vI1Y, &vI1Z, &nI1X, &nI1Y, &nI1Z, &uI1X, &uI1Y,
v1X, v1Y, v1Z,
v2X, v2Y, v2Z,
n1X, n1Y, n1Z,
n2X, n2Y, n2Z,
u1X, u1Y,
u2X, u2Y
);
// points2.push(v0, vI1, vI0)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(vI1X);
points2.push_back(vI1Y);
points2.push_back(vI1Z);
points2.push_back(vI0X);
points2.push_back(vI0Y);
points2.push_back(vI0Z);
// normals2.push(n0, nI1, nI0)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(nI1X);
normals2.push_back(nI1Y);
normals2.push_back(nI1Z);
normals2.push_back(nI0X);
normals2.push_back(nI0Y);
normals2.push_back(nI0Z);
// uvs2.push(u0, uI1, uI0)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(uI1X);
uvs2.push_back(uI1Y);
uvs2.push_back(uI0X);
uvs2.push_back(uI0Y);
// points2.push(v0, v1, vI1)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(vI1X);
points2.push_back(vI1Y);
points2.push_back(vI1Z);
// normals2.push(n0, n1, nI1)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(nI1X);
normals2.push_back(nI1Y);
normals2.push_back(nI1Z);
// uvs2.push(u0, u1, uI1)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(uI1X);
uvs2.push_back(uI1Y);
// points1.push(v2, vI0, vI1)
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
points1.push_back(vI0X);
points1.push_back(vI0Y);
points1.push_back(vI0Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);
points1.push_back(vI1Z);
// normals1.push(n2, nI0, nI1)
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
normals1.push_back(nI0X);
normals1.push_back(nI0Y);
normals1.push_back(nI0Z);
normals1.push_back(nI1X);
normals1.push_back(nI1Y);
normals1.push_back(nI1Z);
// uvs1.push(u2, uI0, uI1)
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
uvs1.push_back(uI0X);
uvs1.push_back(uI0Y);
uvs1.push_back(uI1X);
uvs1.push_back(uI1Y);
} else if (sign2 == 0) {
// points2.push(v0, v1, v2)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(v2X);
points2.push_back(v2Y);
points2.push_back(v2Z);
// normals2.push(n0, n1, n2)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(n2X);
normals2.push_back(n2Y);
normals2.push_back(n2Z);
// uvs2.push(u0, u1, u2)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(u2X);
uvs2.push_back(u2Y);
}
} else if (sign0 == 0) {
if (sign2 == -1) {
// points1.push(v0, v1, v2)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
// normals1.push(n0, n1, n2)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
// uvs1.push(u0, u1, u2)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
} else if (sign2 == 1) {
// points2.push(v0, v1, v2)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(v2X);
points2.push_back(v2Y);
points2.push_back(v2Z);
// normals2.push(n0, n1, n2)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(n2X);
normals2.push_back(n2Y);
normals2.push_back(n2Z);
// uvs2.push(u0, u1, u2)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(u2X);
uvs2.push_back(u2Y);
}
}
} else if (sign1 == sign2) {
if (sign1 == -1) {
if (sign0 == 1) {
// let { vI: vI0, nI: nI0, uI: uI0 } = this.getIntersectNode(v1, v0, n1, n0, u1, u0)
float vI0X, vI0Y, vI0Z, nI0X, nI0Y, nI0Z, uI0X, uI0Y;
getIntersectNode(
&vI0X, &vI0Y, &vI0Z, &nI0X, &nI0Y, &nI0Z, &uI0X, &uI0Y,
v1X, v1Y, v1Z,
v0X, v0Y, v0Z,
n1X, n1Y, n1Z,
n0X, n0Y, n0Z,
u1X, u1Y,
u0X, u0Y
);
// let { vI: vI1, nI: nI1, uI: uI1 } = this.getIntersectNode(v2, v0, n2, n0, u2, u0)
float vI1X, vI1Y, vI1Z, nI1X, nI1Y, nI1Z, uI1X, uI1Y;
getIntersectNode(
&vI1X, &vI1Y, &vI1Z, &nI1X, &nI1Y, &nI1Z, &uI1X, &uI1Y,
v2X, v2Y, v2Z,
v0X, v0Y, v0Z,
n2X, n2Y, n2Z,
n0X, n0Y, n0Z,
u2X, u2Y,
u0X, u0Y
);
// points1.push(v1, vI1, vI0)
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);
points1.push_back(vI1Z);
points1.push_back(vI0X);
points1.push_back(vI0Y);
points1.push_back(vI0Z);
// normals1.push(n1, nI1, nI0)
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(nI1X);
normals1.push_back(nI1Y);
normals1.push_back(nI1Z);
normals1.push_back(nI0X);
normals1.push_back(nI0Y);
normals1.push_back(nI0Z);
// uvs1.push(u1, uI1, uI0)
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(uI1X);
uvs1.push_back(uI1Y);
uvs1.push_back(uI0X);
uvs1.push_back(uI0Y);
// points1.push(v1, v2, vI1)
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);
points1.push_back(vI1Z);
// normals1.push(n1, n2, nI1)
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
normals1.push_back(nI1X);
normals1.push_back(nI1Y);
normals1.push_back(nI1Z);
// uvs1.push(u1, u2, uI1)
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
uvs1.push_back(uI1X);
uvs1.push_back(uI1Y);
// points2.push(v0, vI0, vI1)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(vI0X);
points2.push_back(vI0Y);
points2.push_back(vI0Z);
points2.push_back(vI1X);
points2.push_back(vI1Y);
points2.push_back(vI1Z);
// normals2.push(n0, nI0, nI1)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(nI0X);
normals2.push_back(nI0Y);
normals2.push_back(nI0Z);
normals2.push_back(nI1X);
normals2.push_back(nI1Y);
normals2.push_back(nI1Z);
// uvs2.push(u0, uI0, uI1)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(uI0X);
uvs2.push_back(uI0Y);
uvs2.push_back(uI1X);
uvs2.push_back(uI1Y);
} else if (sign0 == 0) {
// points1.push(v0, v1, v2)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
// normals1.push(n0, n1, n2)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
// uvs1.push(u0, u1, u2)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
}
} else if (sign1 == 1) {
if (sign0 == -1) {
// let { vI: vI0, nI: nI0, uI: uI0 } = this.getIntersectNode(v1, v0, n1, n0, u1, u0)
float vI0X, vI0Y, vI0Z, nI0X, nI0Y, nI0Z, uI0X, uI0Y;
getIntersectNode(
&vI0X, &vI0Y, &vI0Z, &nI0X, &nI0Y, &nI0Z, &uI0X, &uI0Y,
v1X, v1Y, v1Z,
v0X, v0Y, v0Z,
n1X, n1Y, n1Z,
n0X, n0Y, n0Z,
u1X, u1Y,
u0X, u0Y
);
// let { vI: vI1, nI: nI1, uI: uI1 } = this.getIntersectNode(v2, v0, n2, n0, u2, u0)
float vI1X, vI1Y, vI1Z, nI1X, nI1Y, nI1Z, uI1X, uI1Y;
getIntersectNode(
&vI1X, &vI1Y, &vI1Z, &nI1X, &nI1Y, &nI1Z, &uI1X, &uI1Y,
v2X, v2Y, v2Z,
v0X, v0Y, v0Z,
n2X, n2Y, n2Z,
n0X, n0Y, n0Z,
u2X, u2Y,
u0X, u0Y
);
// points2.push(v1, vI1, vI0)
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(vI1X);
points2.push_back(vI1Y);
points2.push_back(vI1Z);
points2.push_back(vI0X);
points2.push_back(vI0Y);
points2.push_back(vI0Z);
// normals2.push(n1, nI1, nI0)
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(nI1X);
normals2.push_back(nI1Y);
normals2.push_back(nI1Z);
normals2.push_back(nI0X);
normals2.push_back(nI0Y);
normals2.push_back(nI0Z);
// uvs2.push(u1, uI1, uI0)
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(uI1X);
uvs2.push_back(uI1Y);
uvs2.push_back(uI0X);
uvs2.push_back(uI0Y);
// points2.push(v1, v2, vI1)
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(v2X);
points2.push_back(v2Y);
points2.push_back(v2Z);
points2.push_back(vI1X);
points2.push_back(vI1Y);
points2.push_back(vI1Z);
// normals2.push(n1, n2, nI1)
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(n2X);
normals2.push_back(n2Y);
normals2.push_back(n2Z);
normals2.push_back(nI1X);
normals2.push_back(nI1Y);
normals2.push_back(nI1Z);
// uvs2.push(u1, u2, uI1)
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(u2X);
uvs2.push_back(u2Y);
uvs2.push_back(uI1X);
uvs2.push_back(uI1Y);
// points1.push(v0, vI0, vI1)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(vI0X);
points1.push_back(vI0Y);
points1.push_back(vI0Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);
points1.push_back(vI1Z);
// normals1.push(n0, nI0, nI1)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(nI0X);
normals1.push_back(nI0Y);
normals1.push_back(nI0Z);
normals1.push_back(nI1X);
normals1.push_back(nI1Y);
normals1.push_back(nI1Z);
// uvs1.push(u0, uI0, uI1)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(uI0X);
uvs1.push_back(uI0Y);
uvs1.push_back(uI1X);
uvs1.push_back(uI1Y);
} else if (sign0 == 0) {
// points2.push(v0, v1, v2)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(v2X);
points2.push_back(v2Y);
points2.push_back(v2Z);
// normals2.push(n0, n1, n2)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(n2X);
normals2.push_back(n2Y);
normals2.push_back(n2Z);
// uvs2.push(u0, u1, u2)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(u2X);
uvs2.push_back(u2Y);
}
} else if (sign1 == 0) {
if (sign0 == -1) {
// points1.push(v0, v1, v2)
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(v1X);
points1.push_back(v1Y);
points1.push_back(v1Z);
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
// normals1.push(n0, n1, n2)
normals1.push_back(n0X);
normals1.push_back(n0Y);
normals1.push_back(n0Z);
normals1.push_back(n1X);
normals1.push_back(n1Y);
normals1.push_back(n1Z);
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
// uvs1.push(u0, u1, u2)
uvs1.push_back(u0X);
uvs1.push_back(u0Y);
uvs1.push_back(u1X);
uvs1.push_back(u1Y);
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
} else if (sign0 == 1) {
// points2.push(v0, v1, v2)
points2.push_back(v0X);
points2.push_back(v0Y);
points2.push_back(v0Z);
points2.push_back(v1X);
points2.push_back(v1Y);
points2.push_back(v1Z);
points2.push_back(v2X);
points2.push_back(v2Y);
points2.push_back(v2Z);
// normals2.push(n0, n1, n2)
normals2.push_back(n0X);
normals2.push_back(n0Y);
normals2.push_back(n0Z);
normals2.push_back(n1X);
normals2.push_back(n1Y);
normals2.push_back(n1Z);
normals2.push_back(n2X);
normals2.push_back(n2Y);
normals2.push_back(n2Z);
// uvs2.push(u0, u1, u2)
uvs2.push_back(u0X);
uvs2.push_back(u0Y);
uvs2.push_back(u1X);
uvs2.push_back(u1Y);
uvs2.push_back(u2X);
uvs2.push_back(u2Y);
}
}
} else if (sign2 == sign0) {
if (sign2 == -1) {
if (sign1 == 1) {
// let { vI: vI0, nI: nI0, uI: uI0 } = this.getIntersectNode(v2, v1, n2, n1, u2, u1)
float vI0X, vI0Y, vI0Z, nI0X, nI0Y, nI0Z, uI0X, uI0Y;
getIntersectNode(
&vI0X, &vI0Y, &vI0Z, &nI0X, &nI0Y, &nI0Z, &uI0X, &uI0Y,
v2X, v2Y, v2Z,
v1X, v1Y, v1Z,
n2X, n2Y, n2Z,
n1X, n1Y, n1Z,
u2X, u2Y,
u1X, u1Y
);
// let { vI: vI1, nI: nI1, uI: uI1 } = this.getIntersectNode(v0, v1, n0, n1, u0, u1)
float vI1X, vI1Y, vI1Z, nI1X, nI1Y, nI1Z, uI1X, uI1Y;
getIntersectNode(
&vI1X, &vI1Y, &vI1Z, &nI1X, &nI1Y, &nI1Z, &uI1X, &uI1Y,
v0X, v0Y, v0Z,
v1X, v1Y, v1Z,
n1X, n1Y, n1Z,
n0X, n0Y, n0Z,
u0X, u0Y,
u1X, u1Y
);
// points1.push(v2, vI1, vI0)
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);
points1.push_back(vI1Z);
points1.push_back(vI0X);
points1.push_back(vI0Y);
points1.push_back(vI0Z);
// normals1.push(n2, nI1, nI0)
normals1.push_back(n2X);
normals1.push_back(n2Y);
normals1.push_back(n2Z);
normals1.push_back(nI1X);
normals1.push_back(nI1Y);
normals1.push_back(nI1Z);
normals1.push_back(nI0X);
normals1.push_back(nI0Y);
normals1.push_back(nI0Z);
// uvs1.push(u2, uI1, uI0)
uvs1.push_back(u2X);
uvs1.push_back(u2Y);
uvs1.push_back(uI1X);
uvs1.push_back(uI1Y);
uvs1.push_back(uI0X);
uvs1.push_back(uI0Y);
// points1.push(v2, v0, vI1)
points1.push_back(v2X);
points1.push_back(v2Y);
points1.push_back(v2Z);
points1.push_back(v0X);
points1.push_back(v0Y);
points1.push_back(v0Z);
points1.push_back(vI1X);
points1.push_back(vI1Y);