| 1 |
yangyong |
1.1 |
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//plane : ax + by + cz + d = 0;
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// compute the plane equation from a set of 3 points.
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// returns false if any of the points are co-incident and do not form a plane.
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// A = point 1
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// B = point 2
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// C = point 3
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// plane = destination for plane equation A,B,C,D
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bool computePlane(const double A[],const double B[],const double C[],double plane[])
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{
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bool ret = false;
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double vx = (B[0] - C[0]);
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double vy = (B[1] - C[1]);
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double vz = (B[2] - C[2]);
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double wx = (A[0] - B[0]);
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double wy = (A[1] - B[1]);
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double wz = (A[2] - B[2]);
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double vw_x = vy * wz - vz * wy;
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double vw_y = vz * wx - vx * wz;
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double vw_z = vx * wy - vy * wx;
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double mag = sqrtf((vw_x * vw_x) + (vw_y * vw_y) + (vw_z * vw_z));
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if ( mag > 0 )
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{
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mag = 1.0/mag; // compute the recipricol distance
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ret = true;
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plane[0] = vw_x * mag;
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plane[1] = vw_y * mag;
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plane[2] = vw_z * mag;
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plane[3] = 0.0 - ((plane[0]*A[0])+(plane[1]*A[1])+(plane[2]*A[2]));
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}
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return ret;
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}
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// inertesect a line semgent with a plane, return false if they don't intersect.
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// otherwise computes and returns the intesection point 'split'
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// p1 = 3d point of the start of the line semgent.
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// p2 = 3d point of the end of the line segment.
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// split = address to store the intersection location x,y,z.
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// plane = the plane equation as four doubles A,B,C,D.
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bool intersectLinePlane(const double p1[],const double p2[],double split[],const double plane[])
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{
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double dp1 = p1[0]*plane[0] + p1[1]*plane[1] + p1[2]*plane[2] + plane[3];
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double dp2 = p2[0]*plane[0] + p2[1]*plane[1] + p2[2]*plane[2] + plane[3];
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if ( dp1 > 0 && dp2 > 0 ) return false;
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if ( dp1 < 0 && dp2 < 0 ) return false;
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double dir[3];
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dir[0] = p2[0] - p1[0];
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dir[1] = p2[1] - p1[1];
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dir[2] = p2[2] - p1[2];
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double dot1 = dir[0]*plane[0] + dir[1]*plane[1] + dir[2]*plane[2];
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double dot2 = dp1 - plane[3];
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double t = -(plane[3] + dot2 ) / dot1;
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split[0] = (dir[0]*t)+p1[0];
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split[1] = (dir[1]*t)+p1[1];
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split[2] = (dir[2]*t)+p1[2];
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return true;
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}
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bool intersectLinePlane_tolerance(const double p1[],const double p2[],double split[],const double plane[], double epsilon = 1E-4)
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{
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double dp1 = p1[0]*plane[0] + p1[1]*plane[1] + p1[2]*plane[2] + plane[3];
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double dp2 = p2[0]*plane[0] + p2[1]*plane[1] + p2[2]*plane[2] + plane[3];
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if( fabs(dp1)> epsilon && fabs(dp2) > epsilon){ //within the tolereance, that means point is on the plane
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if ( dp1 > 0 && dp2 > 0 ) return false;
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if ( dp1 < 0 && dp2 < 0 ) return false;
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}
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double dir[3];
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dir[0] = p2[0] - p1[0];
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dir[1] = p2[1] - p1[1];
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dir[2] = p2[2] - p1[2];
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double dot1 = dir[0]*plane[0] + dir[1]*plane[1] + dir[2]*plane[2];
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double dot2 = dp1 - plane[3];
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double t = -(plane[3] + dot2 ) / dot1;
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split[0] = (dir[0]*t)+p1[0];
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split[1] = (dir[1]*t)+p1[1];
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split[2] = (dir[2]*t)+p1[2];
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| 111 |
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return true;
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}
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| 115 |
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// compute the distance between a 3d point and a plane
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double distToPlaneOLD(const double p[],const double plane[])
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{
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return p[0]*plane[0] + p[1]*plane[1] + p[2]*plane[2] + plane[3];
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}
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| 123 |
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| 124 |
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// compute the distance between a 3d point and a plane
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double distToPlane(const double p[],const double plane[])
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{
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double dist = p[0]*plane[0] + p[1]*plane[1] + p[2]*plane[2] + plane[3];
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return dist / sqrt( plane[0] * plane[0] + plane[1] * plane[1] + plane[2] * plane[2]);
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}
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double distTwoPoints(const double p1[],const double p2[]){
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return sqrt( pow(p1[0]-p2[0],2) + pow(p1[1]-p2[1],2) + pow(p1[2]-p2[2],2) );
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}
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| 138 |
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| 139 |
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double check4PointsInAplane(double p1[],double p2[],double p3[],double p4[]){
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double p[4];
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computePlane(p1,p2,p3,p);
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double y = p[0] * p4[0] + p[1] * p4[1] + p[2]*p4[2] + p[3];
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return y;
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}
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int pnpoly(int nvert, double vertx[], double verty[], double testx, double testy){
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int i, j, c = 0;
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for (i = 0, j = nvert-1; i < nvert; j = i++) {
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if ( ((verty[i]>testy) != (verty[j]>testy)) &&
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(testx < (vertx[j]-vertx[i]) * (testy-verty[i]) / (verty[j]-verty[i]) + vertx[i]) )
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c = !c;
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}
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return c;
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}
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// area2D_Polygon(): compute the area of a 2D polygon
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// Input: int n = the number of vertices in the polygon
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// Point* V = an array of n+2 vertices with V[n]=V[0]
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// Return: the (float) area of the polygon
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double area2D_Polygon( int n, double X[],double Y[]){
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double area = 0;
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int i, j, k; // indices
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if (n < 3) return 0; // a degenerate polygon
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for (i=1, j=2, k=0; i<n; i++, j++, k++) {
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//double tmp = j<n? Y[j]: Y[0];
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area += X[i] * (Y[j] - Y[k]);
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}
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area += X[0] * (Y[1] - Y[n-1]); // wrap-around term
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return area / 2.0;
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}
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double AreaofPolygon(int nvert,double X[], double Y[]){
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double area=0. ;
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int i, j=nvert-1 ;
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for (i=0; i<nvert; i++) {
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area+=(X[j]+X[i])*(Y[j]-Y[i]);
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j=i;
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}
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return area*.5;
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}
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void distPreStepPointAllSides(double pos[],double pre[],int ieta, int iphi, float res[], int iz= 0, int inEB=1){
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if( inEB && !( ieta>=0 && ieta<=169 && iphi>=0 && iphi<=369)){
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cout<<"input ieta/iphi "<< ieta<<" "<<iphi<<endl;
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exit(1);
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}
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double p[4];
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double ct[3];
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if(inEB==1){
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ct[0] = xctEBAll[ieta][iphi];
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ct[1] = yctEBAll[ieta][iphi];
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ct[2] = zctEBAll[ieta][iphi];
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}else{
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ct[0] = xctEEAll[iz][ieta][iphi];
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ct[1] = yctEEAll[iz][ieta][iphi];
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ct[2] = zctEEAll[iz][ieta][iphi];
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if(iz!=1 && iz!=0){
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cout<<"wrong iz "<< iz <<endl;
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exit(1);
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}
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}
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double split[3];
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bool intersets[6];
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int inpolygon[6];
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| 221 |
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double dist_ct[6];
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double dist_pre[6];
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double distpremin = 1E9;
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int ind_distpremin = -1;
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double split_new_all[6][2];
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for(int j=0; j<6;j++){
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for(int k=0; k<2; k++){
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split_new_all[j][k] = -9;
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}
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}
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for(int pl = 0; pl<=5; pl++){
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for(int j1=0; j1<4; j1++){
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| 236 |
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if(inEB==1){
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p[j1] = map_planes_eb[ieta][iphi][4*pl+j1];
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| 238 |
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}else{
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| 239 |
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p[j1] = map_planes_ee[iz][ieta][iphi][4*pl+j1];
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| 240 |
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}
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| 241 |
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}
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| 242 |
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| 243 |
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double dd1 = distToPlane(pre,p);
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double dd0 = distToPlane(ct,p);
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| 246 |
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if(distpremin>fabs(dd1)){
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distpremin = fabs(dd1);
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| 248 |
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ind_distpremin = pl;
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| 249 |
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}
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| 250 |
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| 251 |
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dist_ct[pl] = dd0;
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| 252 |
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dist_pre[pl] = dd1;
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| 253 |
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| 254 |
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//bool interset_strict = intersectLinePlane(pos,pre,split,p);
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bool interset = intersectLinePlane_tolerance(pos,pre,split,p);
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| 256 |
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| 257 |
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intersets[pl] = interset;
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| 258 |
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inpolygon[pl] = 0;
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| 259 |
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| 260 |
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if(interset){//check the split if inside the area
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| 261 |
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double points[4][3];
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| 263 |
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double points_new[4][2];
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points_new[0][0] =0;
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| 265 |
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points_new[0][1] =0;
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| 266 |
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| 267 |
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for(int l=0; l<4; l++){ // 4 lines
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| 268 |
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int ind1 = coindall[pl][l];
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| 269 |
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| 270 |
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if(inEB==1){
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| 271 |
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points[l][0] = coxEBAll[ieta][iphi][ind1];
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| 272 |
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points[l][1] = coyEBAll[ieta][iphi][ind1];
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| 273 |
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points[l][2] = cozEBAll[ieta][iphi][ind1];
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| 274 |
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}else{
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| 275 |
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points[l][0] = coxEEAll[iz][ieta][iphi][ind1];
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| 276 |
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points[l][1] = coyEEAll[iz][ieta][iphi][ind1];
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| 277 |
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points[l][2] = cozEEAll[iz][ieta][iphi][ind1];
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| 278 |
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}
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| 279 |
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| 280 |
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}
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| 281 |
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points_new[1][0] = distTwoPoints(points[1],points[0]);
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| 282 |
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points_new[1][1] = 0;
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| 283 |
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TVector3 v12(points[1][0]-points[0][0],points[1][1]-points[0][1],points[1][2]-points[0][2] );
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| 284 |
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TVector3 v13(points[2][0]-points[0][0],points[2][1]-points[0][1],points[2][2]-points[0][2] );
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| 285 |
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TVector3 v14(points[3][0]-points[0][0],points[3][1]-points[0][1],points[3][2]-points[0][2] );
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| 286 |
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double theta = v12.Angle(v13);
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| 287 |
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double d13 = distTwoPoints(points[0],points[2]);
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| 288 |
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| 289 |
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if( fabs(d13*cos(theta)-v12.Dot(v13)/v12.Mag() ) > 1E-10 ){
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| 290 |
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cout<<"check1 "<< d13*cos(theta) <<" "<< v12.Dot(v13)/v12.Mag() <<" "<< d13*cos(theta) - v12.Dot(v13)/v12.Mag() <<endl;
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| 291 |
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exit(1);
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| 292 |
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}
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| 293 |
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TVector3 v = v12.Cross(v13);
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| 294 |
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if( v.z() ==0){
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| 295 |
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cout<<"wrong v12Xv13 ?? "<< v.z()<<endl;
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| 296 |
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exit(1);
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| 297 |
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}
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| 298 |
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| 299 |
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if( fabs( v.Mag()/v12.Mag() - d13 * sin(theta)) > 1E-10 ){
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| 300 |
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cout<<"check2 "<< v.Mag()/v12.Mag() <<" "<< d13 * sin(theta) <<" "<< v.Mag()/v12.Mag() - d13 * sin(theta) <<endl;
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| 301 |
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exit(1);
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| 302 |
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}
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| 303 |
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| 304 |
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points_new[2][0] = v12.Dot(v13)/v12.Mag();
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| 305 |
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points_new[2][1] = v.z()/fabs(v.z()) * v.Mag()/v12.Mag();
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| 306 |
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theta = v12.Angle(v14);
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| 307 |
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v = v12.Cross(v14);
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| 308 |
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if( v.z() ==0){
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| 309 |
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cout<<"wrong v12Xv14 ?? "<< v.z()<<endl;
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| 310 |
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exit(1);
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| 311 |
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}
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| 312 |
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| 313 |
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points_new[3][0] = v12.Dot(v14)/v12.Mag();
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| 314 |
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points_new[3][1] = v.z()/fabs(v.z()) * v.Mag()/v12.Mag();
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| 315 |
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| 316 |
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//now check if the split
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| 317 |
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double split_new[2];
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| 318 |
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| 319 |
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TVector3 v1s(split[0]-points[0][0],split[1]-points[0][1],split[2]-points[0][2]);
|
| 320 |
|
|
v = v12.Cross(v1s);
|
| 321 |
|
|
split_new[0] = v12.Dot(v1s)/v12.Mag();
|
| 322 |
|
|
if(v.z()==0){
|
| 323 |
|
|
split_new[1] = 0 ;
|
| 324 |
|
|
} else{
|
| 325 |
|
|
split_new[1] = v.z()/fabs(v.z()) * v.Mag()/v12.Mag();
|
| 326 |
|
|
}
|
| 327 |
|
|
|
| 328 |
|
|
//now check split_new inside
|
| 329 |
|
|
double vx[4];
|
| 330 |
|
|
double vy[4];
|
| 331 |
|
|
|
| 332 |
|
|
for(int n=0; n<4; n++){
|
| 333 |
|
|
vx[n] = points_new[n][0];
|
| 334 |
|
|
vy[n] = points_new[n][1];
|
| 335 |
|
|
}
|
| 336 |
|
|
int c = pnpoly(4,vx,vy,split_new[0],split_new[1]);
|
| 337 |
|
|
inpolygon[pl] = c;
|
| 338 |
|
|
|
| 339 |
|
|
|
| 340 |
|
|
split_new_all[pl][0] = split_new[0];
|
| 341 |
|
|
split_new_all[pl][1] = split_new[1];
|
| 342 |
|
|
|
| 343 |
|
|
|
| 344 |
|
|
}///if interset
|
| 345 |
|
|
|
| 346 |
|
|
|
| 347 |
|
|
}//all 6 planes
|
| 348 |
|
|
|
| 349 |
|
|
//first find intersets and inside area
|
| 350 |
|
|
vector<int> pl;
|
| 351 |
|
|
for(int j=0; j<6; j++){
|
| 352 |
|
|
if( intersets[j] && inpolygon[j] ){
|
| 353 |
|
|
pl.push_back(j);
|
| 354 |
|
|
}
|
| 355 |
|
|
}
|
| 356 |
|
|
|
| 357 |
|
|
int ind;
|
| 358 |
|
|
if(pl.size()>1){
|
| 359 |
|
|
|
| 360 |
|
|
double premin = 1E9;
|
| 361 |
|
|
ind = pl[0];
|
| 362 |
|
|
for(int j=0;j<int(pl.size());j++){
|
| 363 |
|
|
if(premin> fabs(dist_pre[pl[j]])){
|
| 364 |
|
|
premin = fabs(dist_pre[pl[j]]);
|
| 365 |
|
|
ind = pl[j];
|
| 366 |
|
|
}
|
| 367 |
|
|
}
|
| 368 |
|
|
|
| 369 |
|
|
}else if(pl.size()==1){
|
| 370 |
|
|
ind = pl[0];
|
| 371 |
|
|
|
| 372 |
|
|
|
| 373 |
|
|
}else{
|
| 374 |
|
|
ind = ind_distpremin;
|
| 375 |
|
|
}
|
| 376 |
|
|
res[0] = dist_pre[ind] * dist_ct[ind]>0 ? fabs(dist_pre[ind]) : -fabs(dist_pre[ind]); //postive means inside
|
| 377 |
|
|
|
| 378 |
|
|
res[1] = ind;
|
| 379 |
|
|
res[2] = split_new_all[ind][0];
|
| 380 |
|
|
res[3] = split_new_all[ind][1];
|
| 381 |
|
|
|
| 382 |
|
|
|
| 383 |
|
|
}
|
| 384 |
|
|
|
