| //======================================================================== |
| // |
| // SplashMath.h |
| // |
| //======================================================================== |
| |
| #ifndef SPLASHMATH_H |
| #define SPLASHMATH_H |
| |
| #if USE_FIXEDPOINT |
| #include "goo/FixedPoint.h" |
| #else |
| #include <math.h> |
| #endif |
| #include "SplashTypes.h" |
| |
| static inline SplashCoord splashAbs(SplashCoord x) { |
| #if USE_FIXEDPOINT |
| return FixedPoint::abs(x); |
| #else |
| return fabs(x); |
| #endif |
| } |
| |
| static inline int splashFloor(SplashCoord x) { |
| #if USE_FIXEDPOINT |
| return FixedPoint::floor(x); |
| #else |
| return (int)floor(x); |
| #endif |
| } |
| |
| static inline int splashCeil(SplashCoord x) { |
| #if USE_FIXEDPOINT |
| return FixedPoint::ceil(x); |
| #else |
| return (int)ceil(x); |
| #endif |
| } |
| |
| static inline int splashRound(SplashCoord x) { |
| #if USE_FIXEDPOINT |
| return FixedPoint::round(x); |
| #else |
| return (int)floor(x + 0.5); |
| #endif |
| } |
| |
| static inline SplashCoord splashSqrt(SplashCoord x) { |
| #if USE_FIXEDPOINT |
| return FixedPoint::sqrt(x); |
| #else |
| return sqrt(x); |
| #endif |
| } |
| |
| static inline SplashCoord splashPow(SplashCoord x, SplashCoord y) { |
| #if USE_FIXEDPOINT |
| return FixedPoint::pow(x, y); |
| #else |
| return pow(x, y); |
| #endif |
| } |
| |
| static inline SplashCoord splashDist(SplashCoord x0, SplashCoord y0, |
| SplashCoord x1, SplashCoord y1) { |
| SplashCoord dx, dy; |
| dx = x1 - x0; |
| dy = y1 - y0; |
| #if USE_FIXEDPOINT |
| // this handles the situation where dx*dx or dy*dy is too large to |
| // fit in the 16.16 fixed point format |
| SplashCoord dxa, dya; |
| dxa = splashAbs(dx); |
| dya = splashAbs(dy); |
| if (dxa == 0 && dya == 0) { |
| return 0; |
| } else if (dxa > dya) { |
| return dxa * FixedPoint::sqrt(dya / dxa + 1); |
| } else { |
| return dya * FixedPoint::sqrt(dxa / dya + 1); |
| } |
| #else |
| return sqrt(dx * dx + dy * dy); |
| #endif |
| } |
| |
| #endif |