juce_Point.h

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 /*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
template <typename ValueType>
class Point
{
public:
    constexpr Point() = default;
 
    constexpr Point (const Point&) = default;
 
    constexpr Point (ValueType initialX, ValueType initialY) noexcept : x (initialX), y (initialY) {}
 
    //==============================================================================
    Point& operator= (const Point&) = default;
 
    constexpr inline bool operator== (Point other) const noexcept
    {
        const auto tie = [] (const Point& p) { return std::tie (p.x, p.y); };
        return tie (*this) == tie (other);
    }
 
    constexpr inline bool operator!= (Point other) const noexcept      { return ! operator== (other); }
 
    constexpr bool isOrigin() const noexcept                           { return operator== (Point()); }
 
    constexpr inline bool isFinite() const noexcept                    { return juce_isfinite (x) && juce_isfinite (y); }
 
    constexpr inline ValueType getX() const noexcept                   { return x; }
 
    constexpr inline ValueType getY() const noexcept                   { return y; }
 
    inline void setX (ValueType newX) noexcept                         { x = newX; }
 
    inline void setY (ValueType newY) noexcept                         { y = newY; }
 
    constexpr Point withX (ValueType newX) const noexcept              { return Point (newX, y); }
 
    constexpr Point withY (ValueType newY) const noexcept              { return Point (x, newY); }
 
    void setXY (ValueType newX, ValueType newY) noexcept               { x = newX; y = newY; }
 
    void addXY (ValueType xToAdd, ValueType yToAdd) noexcept           { x += xToAdd; y += yToAdd; }
 
    //==============================================================================
    constexpr Point translated (ValueType deltaX, ValueType deltaY) const noexcept    { return Point (x + deltaX, y + deltaY); }
 
    constexpr Point operator+ (Point other) const noexcept             { return Point (x + other.x, y + other.y); }
 
    Point& operator+= (Point other) noexcept                           { x += other.x; y += other.y; return *this; }
 
    constexpr Point operator- (Point other) const noexcept             { return Point (x - other.x, y - other.y); }
 
    Point& operator-= (Point other) noexcept                           { x -= other.x; y -= other.y; return *this; }
 
    template <typename OtherType>
    constexpr Point operator* (Point<OtherType> other) const noexcept  { return Point ((ValueType) (x * other.x), (ValueType) (y * other.y)); }
 
    template <typename OtherType>
    Point& operator*= (Point<OtherType> other) noexcept                { *this = *this * other; return *this; }
 
    template <typename OtherType>
    constexpr Point operator/ (Point<OtherType> other) const noexcept  { return Point ((ValueType) (x / other.x), (ValueType) (y / other.y)); }
 
    template <typename OtherType>
    Point& operator/= (Point<OtherType> other) noexcept                { *this = *this / other; return *this; }
 
    template <typename OtherType>
    constexpr Point operator* (OtherType multiplier) const noexcept
    {
        using CommonType = std::common_type_t<ValueType, OtherType>;
        return Point ((ValueType) ((CommonType) x * (CommonType) multiplier),
                      (ValueType) ((CommonType) y * (CommonType) multiplier));
    }
 
    template <typename OtherType>
    constexpr Point operator/ (OtherType divisor) const noexcept
    {
        using CommonType = std::common_type_t<ValueType, OtherType>;
        return Point ((ValueType) ((CommonType) x / (CommonType) divisor),
                      (ValueType) ((CommonType) y / (CommonType) divisor));
    }
 
    template <typename FloatType>
    Point& operator*= (FloatType multiplier) noexcept                  { x = (ValueType) (x * multiplier); y = (ValueType) (y * multiplier); return *this; }
 
    template <typename FloatType>
    Point& operator/= (FloatType divisor) noexcept                     { x = (ValueType) (x / divisor); y = (ValueType) (y / divisor); return *this; }
 
    constexpr Point operator-() const noexcept                         { return Point (-x, -y); }
 
    //==============================================================================
    using FloatType = TypeHelpers::SmallestFloatType<ValueType>;
 
    //==============================================================================
    ValueType getDistanceFromOrigin() const noexcept                          { return juce_hypot (x, y); }
 
    ValueType getDistanceFrom (Point other) const noexcept                    { return juce_hypot (x - other.x, y - other.y); }
 
    constexpr ValueType getDistanceSquaredFromOrigin() const noexcept         { return x * x + y * y; }
 
    constexpr ValueType getDistanceSquaredFrom (Point other) const noexcept   { return (*this - other).getDistanceSquaredFromOrigin(); }
 
    FloatType getAngleToPoint (Point other) const noexcept
    {
        return static_cast<FloatType> (std::atan2 (static_cast<FloatType> (other.x - x),
                                                   static_cast<FloatType> (y - other.y)));
    }
 
    Point rotatedAboutOrigin (ValueType angleRadians) const noexcept
    {
        return Point (x * std::cos (angleRadians) - y * std::sin (angleRadians),
                      x * std::sin (angleRadians) + y * std::cos (angleRadians));
    }
 
    Point<FloatType> getPointOnCircumference (float radius, float angle) const noexcept
    {
        return Point<FloatType> (static_cast<FloatType> (x + radius * std::sin (angle)),
                                 static_cast<FloatType> (y - radius * std::cos (angle)));
    }
 
    Point<FloatType> getPointOnCircumference (float radiusX, float radiusY, float angle) const noexcept
    {
        return Point<FloatType> (static_cast<FloatType> (x + radiusX * std::sin (angle)),
                                 static_cast<FloatType> (y - radiusY * std::cos (angle)));
    }
 
    constexpr FloatType getDotProduct (Point other) const noexcept     { return x * other.x + y * other.y; }
 
    //==============================================================================
    void applyTransform (const AffineTransform& transform) noexcept     { transform.transformPoint (x, y); }
 
    Point transformedBy (const AffineTransform& transform) const noexcept
    {
        return Point (static_cast<ValueType> (transform.mat00 * (float) x + transform.mat01 * (float) y + transform.mat02),
                      static_cast<ValueType> (transform.mat10 * (float) x + transform.mat11 * (float) y + transform.mat12));
    }
 
    //==============================================================================
    constexpr Point<int> toInt() const noexcept              { return Point<int> (static_cast<int> (x), static_cast<int> (y)); }
 
    constexpr Point<float> toFloat() const noexcept          { return Point<float> (static_cast<float> (x), static_cast<float> (y)); }
 
    constexpr Point<double> toDouble() const noexcept        { return Point<double> (static_cast<double> (x), static_cast<double> (y)); }
 
    constexpr Point<int> roundToInt() const noexcept         { return Point<int> (juce::roundToInt (x), juce::roundToInt (y)); }
 
    String toString() const                                       { return String (x) + ", " + String (y); }
 
    //==============================================================================
    ValueType x{}; 
    ValueType y{}; 
};
 
template <typename ValueType>
Point<ValueType> operator* (ValueType value, Point<ValueType> p) noexcept       { return p * value; }
 
} // namespace juce