Function MoveVert

editor/HRoom.cpp:3059–3083

Moves a vertex along its two adjacent edges Only moves if the two adjacent edges are colinear

// Moves a vertex along its two adjacent edges
// Only moves if the two adjacent edges are colinear
void MoveVert(room *rp, int facenum, int vertnum, float new_position) {
  face *fp = &rp->faces[facenum];
  vector normal;
  float mag;
  int prev_vertnum = (vertnum + fp->num_verts - 1) % fp->num_verts;
  int next_vertnum = (vertnum + 1) % fp->num_verts;
  vector *v0, *v1, newv;

  mag = vm_GetNormal(&normal, &rp->verts[fp->face_verts[prev_vertnum]], &rp->verts[fp->face_verts[vertnum]],
                     &rp->verts[fp->face_verts[next_vertnum]]);

  if (mag >= MIN_NORMAL_MAG) {
    OutrageMessageBox("Can't move point: edges aren't colinear.");
    return;
  }

  v0 = &rp->verts[fp->face_verts[prev_vertnum]];
  v1 = &rp->verts[fp->face_verts[next_vertnum]];

  newv = *v0 + (*v1 - *v0) * new_position;

  rp->verts[fp->face_verts[vertnum]] = newv;

  World_changed = 1;
}

#include "polymodel.h"