Method transform

core/src/processing/opengl/PShapeOpenGL.java:1350–1423

(int type, float... args)

  protected void transform(int type, float... args) {
    int dimensions = is3D ? 3 : 2;
    boolean invertible = true;
    checkMatrix(dimensions);
    if (transform == null) {
      if (dimensions == 2) {
        transform = new PMatrix2D();
        transformInv = new PMatrix2D();
      } else {
        transform = new PMatrix3D();
        transformInv = new PMatrix3D();
      }
    } else {
      transform.reset();
      transformInv.reset();
    }

    int ncoords = args.length;
    if (type == ROTATE) {
      ncoords = args.length == 1 ? 2 : 3;
    } else if (type == MATRIX) {
      ncoords = args.length == 6 ? 2 : 3;
    }

    switch (type) {
    case TRANSLATE:
      if (ncoords == 3) {
        transform.translate(args[0], args[1], args[2]);
        PGraphicsOpenGL.invTranslate((PMatrix3D)transformInv, args[0], args[1], args[2]);
      } else {
        transform.translate(args[0], args[1]);
        PGraphicsOpenGL.invTranslate((PMatrix2D)transformInv, args[0], args[1]);
      }
      break;
    case ROTATE:
      if (ncoords == 3) {
        transform.rotate(args[0], args[1], args[2], args[3]);
        PGraphicsOpenGL.invRotate((PMatrix3D)transformInv, args[0], args[1], args[2], args[3]);
      } else {
        transform.rotate(args[0]);
        PGraphicsOpenGL.invRotate((PMatrix2D)transformInv, -args[0]);
      }
      break;
    case SCALE:
      if (ncoords == 3) {
        transform.scale(args[0], args[1], args[2]);
        PGraphicsOpenGL.invScale((PMatrix3D)transformInv, args[0], args[1], args[2]);
      } else {
        transform.scale(args[0], args[1]);
        PGraphicsOpenGL.invScale((PMatrix2D)transformInv, args[0], args[1]);
      }
      break;
    case MATRIX:
      if (ncoords == 3) {
        transform.set(args[ 0], args[ 1], args[ 2], args[ 3],
                      args[ 4], args[ 5], args[ 6], args[ 7],
                      args[ 8], args[ 9], args[10], args[11],
                      args[12], args[13], args[14], args[15]);