From 515e802ae20c045e5c47b400ee6ef6e92349c978 Mon Sep 17 00:00:00 2001 From: Allan Sandfeld Jensen Date: Wed, 14 Jan 2015 11:17:47 +0100 Subject: Use C++ instead of Including math.h can pollute the default namespace, and break some compilers if cmath versions of the method are declared as using. Switching to C++ math functions also greatly simplifies handling of float qreal as C++ automatically chooses the right method. [ChangeLog][QtCore][QtMath] qmath.h no longer includes math.h, so any sources depending on that indirect inclusion may fail to build. Change-Id: I4d0e331dafba354ec05dc5052e61ef4ff8d387fe Reviewed-by: Rafael Roquetto --- examples/widgets/effects/lighting/lighting.cpp | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'examples/widgets/effects/lighting/lighting.cpp') diff --git a/examples/widgets/effects/lighting/lighting.cpp b/examples/widgets/effects/lighting/lighting.cpp index 1bf18160b4..67bcb8147b 100644 --- a/examples/widgets/effects/lighting/lighting.cpp +++ b/examples/widgets/effects/lighting/lighting.cpp @@ -41,6 +41,7 @@ #include "lighting.h" #include +#include #ifndef M_PI #define M_PI 3.14159265358979323846 @@ -110,8 +111,8 @@ void Lighting::setupScene() void Lighting::animate() { angle += (M_PI / 30); - qreal xs = 200 * sin(angle) - 40 + 25; - qreal ys = 200 * cos(angle) - 40 + 25; + qreal xs = 200 * qSin(angle) - 40 + 25; + qreal ys = 200 * qCos(angle) - 40 + 25; m_lightSource->setPos(xs, ys); for (int i = 0; i < m_items.size(); ++i) { @@ -125,7 +126,7 @@ void Lighting::animate() qreal dx = delta.x(); qreal dy = delta.y(); - qreal dd = sqrt(dx * dx + dy * dy); + qreal dd = qSqrt(dx * dx + dy * dy); QColor color = effect->color(); color.setAlphaF(qBound(0.4, 1 - dd / 200.0, 0.7)); effect->setColor(color); -- cgit v1.2.3