Method rotate

core/src/processing/core/PMatrix2D.java:172–184

(float angle)

  // Implementation roughly based on AffineTransform.
  public void rotate(float angle) {
    float s = sin(angle);
    float c = cos(angle);

    float temp1 = m00;
    float temp2 = m01;
    m00 =  c * temp1 + s * temp2;
    m01 = -s * temp1 + c * temp2;
    temp1 = m10;
    temp2 = m11;
    m10 =  c * temp1 + s * temp2;
    m11 = -s * temp1 + c * temp2;
  }


  /**