Function transformPlane

packages/engine/Source/Scene/VoxelBoundsCollection.js:315–347

(plane, transform, result)

const scratchTransformedNormal = new Cartesian3();

function transformPlane(plane, transform, result) {
  //>>includeStart('debug', pragmas.debug);
  Check.typeOf.object("plane", plane);
  Check.typeOf.object("transform", transform);
  //>>includeEnd('debug');

  const { normal, distance } = plane;
  const planeAsCartesian4 = Cartesian4.fromElements(
    normal.x,
    normal.y,
    normal.z,
    distance,
    scratchPlaneCartesian4,
  );
  let transformedPlane = Matrix4.multiplyByVector(
    transform,
    planeAsCartesian4,
    scratchPlaneCartesian4,
  );

  // Convert the transformed plane to Hessian Normal Form
  const transformedNormal = Cartesian3.fromCartesian4(
    transformedPlane,
    scratchTransformedNormal,
  );
  transformedPlane = Cartesian4.divideByScalar(
    transformedPlane,
    Cartesian3.magnitude(transformedNormal),
    scratchPlaneCartesian4,
  );

  return Plane.fromCartesian4(transformedPlane, result);
}

function computeTextureResolution(pixelsNeeded, result) {
  result.x = Math.min(pixelsNeeded, ContextLimits.maximumTextureSize);