SPoint.cpp

 
/*
 * Copyright 2008 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include <souistd.h>
#include "matrix/SPoint.h"
 
SNSBEGIN
 
float SPoint::Length(float dx, float dy)
{
    float mag2 = dx * dx + dy * dy;
    if (SFloatIsFinite(mag2))
    {
        return sk_float_sqrt(mag2);
    }
    else
    {
        double xx = dx;
        double yy = dy;
        return (float)sqrt(xx * xx + yy * yy);
    }
}
 
void SPoint::iset(int32_t x, int32_t y)
{
    fX = SkIntToScalar(x);
    fY = SkIntToScalar(y);
}
 
void SPoint::iset(const POINT &p)
{
    fX = SkIntToScalar(p.x);
    fY = SkIntToScalar(p.y);
}
 
POINT SPoint::toPoint() const
{
    POINT pt = { SFloatRoundToInt(fX), SFloatRoundToInt(fY) };
    return pt;
}
 
float SPoint::dot(const SPoint &vec) const
{
    return DotProduct(*this, vec);
}
 
float SPoint::DotProduct(const SPoint &a, const SPoint &b)
{
    return a.fX * b.fX + a.fY * b.fY;
}
 
SNSEND