+
+void setPitchYawRollRad(core::matrix4 &m, const v3f &rot);
+
+inline void setPitchYawRoll(core::matrix4 &m, const v3f &rot)
+{
+ setPitchYawRollRad(m, rot * core::DEGTORAD64);
+}
+
+v3f getPitchYawRollRad(const core::matrix4 &m);
+
+inline v3f getPitchYawRoll(const core::matrix4 &m)
+{
+ return getPitchYawRollRad(m) * core::RADTODEG64;
+}
+
+// Muliply the RGB value of a color linearly, and clamp to black/white
+inline irr::video::SColor multiplyColorValue(const irr::video::SColor &color, float mod)
+{
+ return irr::video::SColor(color.getAlpha(),
+ core::clamp<u32>(color.getRed() * mod, 0, 255),
+ core::clamp<u32>(color.getGreen() * mod, 0, 255),
+ core::clamp<u32>(color.getBlue() * mod, 0, 255));
+}
+
+template <typename T> inline T numericAbsolute(T v) { return v < 0 ? T(-v) : v; }
+template <typename T> inline T numericSign(T v) { return T(v < 0 ? -1 : (v == 0 ? 0 : 1)); }
+
+inline v3f vecAbsolute(v3f v)
+{
+ return v3f(
+ numericAbsolute(v.X),
+ numericAbsolute(v.Y),
+ numericAbsolute(v.Z)
+ );
+}
+
+inline v3f vecSign(v3f v)
+{
+ return v3f(
+ numericSign(v.X),
+ numericSign(v.Y),
+ numericSign(v.Z)
+ );
+}