makeCircularSector method

dynamic makeCircularSector(
  1. dynamic center,
  2. dynamic p1,
  3. dynamic p2,
  4. dynamic u,
  5. dynamic v,
)

Implementation

makeCircularSector(center, p1, p2, u, v) {
  // param p1, p2: Points in the circle arc.
  // p1 and p2 are in clockwise direction.

  tempV2_1.copy(p1).sub(center).normalize();
  tempV2_2.copy(p2).sub(center).normalize();

  var angle = Math.pi;
  var dot = tempV2_1.dot(tempV2_2);
  if (Math.abs(dot) < 1) angle = Math.abs(Math.acos(dot)).toDouble();

  angle /= arcDivisions;

  tempV2_3.copy(p1);

  for (var i = 0, il = arcDivisions - 1; i < il; i++) {
    tempV2_4.copy(tempV2_3).rotateAround(center, angle);

    addVertex(tempV2_3, u, v);
    addVertex(tempV2_4, u, v);
    addVertex(center, u, 0.5);

    tempV2_3.copy(tempV2_4);
  }

  addVertex(tempV2_4, u, v);
  addVertex(p2, u, v);
  addVertex(center, u, 0.5);
}