Golang C.ALfloat函数代码示例

func LoadMemoryWaveform(waveshape al.ALenum, frequency float32, phase float32, duration float32) (
	format al.ALenum, size int32, freq float32, data unsafe.Pointer) {
	data = C.alutLoadMemoryWaveform(
		C.ALenum(waveshape), C.ALfloat(frequency), C.ALfloat(phase), C.ALfloat(duration),
		(*C.ALenum)(&format),
		(*C.ALsizei)(&size),
		(*C.ALfloat)(&frequency),
	)
	return
}

func CreateBufferWavefrom(
	waveshape al.ALenum,
	frequency float32,
	phase float32,
	duration float32,
) al.Buffer {
	return al.Buffer(C.alutCreateBufferWaveform(
		C.ALenum(waveshape),
		C.ALfloat(frequency),
		C.ALfloat(phase),
		C.ALfloat(duration),
	))
}

// Play will play the sound at a given position, the falloff distance in which the sound's volume is cut in half,
// and the volume ( 1.0 is normal volume, 0 is silence )
// It will return the PlayInstance that can be used to stop the source while playing
// Remember that in order for the 3D audio to work properly that the audio needs to be all in one channel, not stereo!
func (s *Sound) Play3D(x, y, z, falloff, volume float32) (request PlayInstance) {
	source, err := requestSource()
	if err != nil {
		return request
	}
	C.alSourcef(source.id, C.AL_GAIN, C.ALfloat(volume))
	C.alSourcei(source.id, C.AL_SOURCE_RELATIVE, C.AL_FALSE)
	C.alSourcef(source.id, C.AL_REFERENCE_DISTANCE, C.ALfloat(falloff))
	C.alSource3f(source.id, C.AL_POSITION, C.ALfloat(x), C.ALfloat(y), C.ALfloat(z))
	C.alSourcei(source.id, C.AL_BUFFER, C.ALint(s.buffer))

	source.setToPlay()
	request.id = source.requestId
	request.src = source
	return request
}

// Play will play the sound. Volume ( 1.0 is normal volume, 0 is silence )
// Returns the PlayInstance that can be used to stop the source while playing
func (s *Sound) Play(volume float32) (request PlayInstance) {
	source, err := requestSource()
	if err != nil {
		return request
	}
	C.alSourcef(source.id, C.AL_GAIN, C.ALfloat(volume))
	C.alSourcei(source.id, C.AL_SOURCE_RELATIVE, C.AL_TRUE)
	C.alSource3f(source.id, C.AL_POSITION, 0, 0, 0)
	C.alSourcei(source.id, C.AL_BUFFER, C.ALint(s.buffer))

	source.setToPlay()
	request.id = source.requestId
	request.src = source
	return request
}

// Renamed, was Buffer3f.
func (self Buffer) set3f(param int32, value1, value2, value3 float32) {
	C.alBuffer3f(C.ALuint(self), C.ALenum(param), C.ALfloat(value1), C.ALfloat(value2), C.ALfloat(value3))
}

// Renamed, was Bufferf.
func (self Buffer) setf(param int32, value float32) {
	C.alBufferf(C.ALuint(self), C.ALenum(param), C.ALfloat(value))
}

func (source Source) Source3f(
	param ALenum, value1, value2, value3 float32) {
	C.alSource3f(
		C.ALuint(source), C.ALenum(param),
		C.ALfloat(value1), C.ALfloat(value2), C.ALfloat(value3))
}

func Listener3f(param ALenum, value1, value2, value3 float32) {
	C.alListener3f(C.ALenum(param), C.ALfloat(value1), C.ALfloat(value2), C.ALfloat(value3))
}

// Renamed, was Listener3f.
func (self Listener) Set3f(param int32, value1, value2, value3 float32) {
	C.alListener3f(C.ALenum(param), C.ALfloat(value1), C.ALfloat(value2), C.ALfloat(value3))
}

func SpeedOfSound(value float32) {
	C.alSpeedOfSound(C.ALfloat(value))
}

/*
 * Global Parameters
 */
func DopplerFactor(value float32) {
	C.alDopplerFactor(C.ALfloat(value))
}

func alSpeedOfSound(v float32) {
	C.alSpeedOfSound(C.ALfloat(v))
}

func alDopplerVelocity(v float32) {
	C.alDopplerVelocity(C.ALfloat(v))
}

func alDopplerFactor(v float32) {
	C.alDopplerFactor(C.ALfloat(v))
}

func alListenerf(k int, v float32) {
	C.alListenerf(C.ALenum(k), C.ALfloat(v))
}