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## geomerative
Class RPoint

    java.lang.Object
      geomerative.RPoint

    public class RPoint

extends java.lang.Object

RPoint is a very simple interface for creating, holding and drawing 2D points.

Field Summary
`float` | `x` The x coordinate of the point.
`float` | `y` The y coordinate of the point.

Constructor Summary
`RPoint()` Create a new point at (0, 0).
`RPoint(double x, double y)`
`RPoint(float x, float y)` Create a new point, given the coordinates.
`RPoint(RPoint p)` Copy a point.

Method Summary
`void` | `add(RPoint p)` Use this to add a vector to this point.
`float` | `angle(RPoint p)` Use this to obtain the angle between the vector and another vector
`RPoint` | `cross(RPoint p)` Use this to perform a cross product of the point with another point.
`float` | `mult(RPoint p)` Use this to multiply a vector to this point.
`float` | `norm()` Use this to obtain the norm of the point.
`void` | `normalize()` Use this to normalize the point.
`void` | `print()`
`void` | `rotate(float angle)`
`void` | `rotate(float angle, float vx, float vy)` Apply a rotation to the point, given the angle and optionally the coordinates of the center of rotation.
`void` | `rotate(float angle, RPoint v)` Apply a rotation to the point, given the angle and optionally the point of the center of rotation.
`void` | `scale(float s)` Apply a scaling to the point, given a scaling factor.
`void` | `scale(float sx, float sy)` Apply a scaling to the point, given the scaling factors.
`void` | `scale(RPoint s)` Apply a scaling to the point, given a scaling vector.
`void` | `sub(RPoint p)` Use this to substract a vector to this point.
`void` | `transform(RMatrix m)` Use this to apply a transformation to the point.
`void` | `translate(float tx, float ty)` Apply a translation to the point.
`void` | `translate(RPoint t)` Apply a translation to the point.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### x

    public float x

  The x coordinate of the point.

### y

    public float y

  The y coordinate of the point.

Constructor Detail

### RPoint

    public RPoint(float x,
                  float y)

  Create a new point, given the coordinates.

  Parameters:
    `x` - the x coordinate of the new point
    `y` - the y coordinate of the new point

### RPoint

    public RPoint(double x,
                  double y)

### RPoint

    public RPoint()

  Create a new point at (0, 0).

### RPoint

    public RPoint(RPoint p)

  Copy a point.

  Parameters:
    `p` - the point we wish to make a copy of

Method Detail

### transform

    public void transform(RMatrix m)

  Use this to apply a transformation to the point.

  Parameters:
    `m` - the transformation matrix to be applied

### translate

    public void translate(float tx,
                          float ty)

  Apply a translation to the point.

  Parameters:
    `tx` - the coefficient of x translation
    `ty` - the coefficient of y translation

### translate

    public void translate(RPoint t)

  Apply a translation to the point.

  Parameters:
    `t` - the translation vector to be applied

### rotate

    public void rotate(float angle,
                       float vx,
                       float vy)

  Apply a rotation to the point, given the angle and optionally the coordinates of the center of rotation.

  Parameters:
    `angle` - the angle of rotation to be applied
    `vx` - the x coordinate of the center of rotation
    `vy` - the y coordinate of the center of rotation

### rotate

    public void rotate(float angle)

### rotate

    public void rotate(float angle,
                       RPoint v)

  Apply a rotation to the point, given the angle and optionally the point of the center of rotation.

  Parameters:
    `angle` - the angle of rotation to be applied
    `v` - the position vector of the center of rotation

### scale

    public void scale(float sx,
                      float sy)

  Apply a scaling to the point, given the scaling factors.

  Parameters:
    `sx` - the scaling coefficient over the x axis
    `sy` - the scaling coefficient over the y axis

### scale

    public void scale(float s)

  Apply a scaling to the point, given a scaling factor.

  Parameters:
    `s` - the scaling coefficient for a uniform scaling

### scale

    public void scale(RPoint s)

  Apply a scaling to the point, given a scaling vector.

  Parameters:
    `s` - the scaling vector

### normalize

    public void normalize()

  Use this to normalize the point. This means that after applying, it's norm will be equal to 1.

### sub

    public void sub(RPoint p)

  Use this to substract a vector to this point.

  Parameters:
    `p` - the vector to substract

### add

    public void add(RPoint p)

  Use this to add a vector to this point.

  Parameters:
    `p` - the vector to add

### mult

    public float mult(RPoint p)

  Use this to multiply a vector to this point. This returns a float corresponding to the scalar product of both vectors.

  Parameters:
    `p` - the vector to multiply
  Returns:
    float, the result of the scalar product

### cross

    public RPoint cross(RPoint p)

  Use this to perform a cross product of the point with another point. This returns a RPoint corresponding to the cross product of both vectors.

  Parameters:
    `p` - the vector to perform the cross product with
  Returns:
    RPoint, the resulting vector of the cross product

### norm

    public float norm()

  Use this to obtain the norm of the point.

  Returns:
    float, the norm of the point

### angle

    public float angle(RPoint p)

  Use this to obtain the angle between the vector and another vector

  Parameters:
    `p` - the vector relative to which we want to evaluate the angle
  Returns:
    float, the angle between the two vectors

### print

    public void print()

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Geomerative by Ricard Marxer, http://www.ricardmarxer.com/geomerative/