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-rw-r--r--drivers/SCsub1
-rw-r--r--drivers/coreaudio/SCsub8
-rw-r--r--drivers/coreaudio/audio_driver_coreaudio.cpp315
-rw-r--r--drivers/coreaudio/audio_driver_coreaudio.h89
-rw-r--r--drivers/gles3/rasterizer_scene_gles3.cpp21
-rw-r--r--drivers/gles3/shaders/scene.glsl24
6 files changed, 437 insertions, 21 deletions
diff --git a/drivers/SCsub b/drivers/SCsub
index 195f7ec438..34d6254578 100644
--- a/drivers/SCsub
+++ b/drivers/SCsub
@@ -13,6 +13,7 @@ SConscript('windows/SCsub')
# Sounds drivers
SConscript('alsa/SCsub')
+SConscript('coreaudio/SCsub')
SConscript('pulseaudio/SCsub')
if (env["platform"] == "windows"):
SConscript("rtaudio/SCsub")
diff --git a/drivers/coreaudio/SCsub b/drivers/coreaudio/SCsub
new file mode 100644
index 0000000000..233593b0f9
--- /dev/null
+++ b/drivers/coreaudio/SCsub
@@ -0,0 +1,8 @@
+#!/usr/bin/env python
+
+Import('env')
+
+# Driver source files
+env.add_source_files(env.drivers_sources, "*.cpp")
+
+Export('env')
diff --git a/drivers/coreaudio/audio_driver_coreaudio.cpp b/drivers/coreaudio/audio_driver_coreaudio.cpp
new file mode 100644
index 0000000000..c531d6af9d
--- /dev/null
+++ b/drivers/coreaudio/audio_driver_coreaudio.cpp
@@ -0,0 +1,315 @@
+/*************************************************************************/
+/* audio_driver_coreaudio.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
+/* */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the */
+/* "Software"), to deal in the Software without restriction, including */
+/* without limitation the rights to use, copy, modify, merge, publish, */
+/* distribute, sublicense, and/or sell copies of the Software, and to */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions: */
+/* */
+/* The above copyright notice and this permission notice shall be */
+/* included in all copies or substantial portions of the Software. */
+/* */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+/*************************************************************************/
+#ifdef COREAUDIO_ENABLED
+
+#include "audio_driver_coreaudio.h"
+#include "core/project_settings.h"
+#include "os/os.h"
+
+#define kOutputBus 0
+
+#ifdef OSX_ENABLED
+static OSStatus outputDeviceAddressCB(AudioObjectID inObjectID, UInt32 inNumberAddresses, const AudioObjectPropertyAddress *inAddresses, void *__nullable inClientData) {
+ AudioDriverCoreAudio *driver = (AudioDriverCoreAudio *)inClientData;
+
+ driver->reopen();
+
+ return noErr;
+}
+#endif
+
+Error AudioDriverCoreAudio::initDevice() {
+ AudioComponentDescription desc;
+ zeromem(&desc, sizeof(desc));
+ desc.componentType = kAudioUnitType_Output;
+#ifdef OSX_ENABLED
+ desc.componentSubType = kAudioUnitSubType_HALOutput;
+#else
+ desc.componentSubType = kAudioUnitSubType_RemoteIO;
+#endif
+ desc.componentManufacturer = kAudioUnitManufacturer_Apple;
+
+ AudioComponent comp = AudioComponentFindNext(NULL, &desc);
+ ERR_FAIL_COND_V(comp == NULL, FAILED);
+
+ OSStatus result = AudioComponentInstanceNew(comp, &audio_unit);
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+
+ AudioStreamBasicDescription strdesc;
+
+ zeromem(&strdesc, sizeof(strdesc));
+ UInt32 size = sizeof(strdesc);
+ result = AudioUnitGetProperty(audio_unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, kOutputBus, &strdesc, &size);
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+
+ switch (strdesc.mChannelsPerFrame) {
+ case 2: // Stereo
+ case 4: // Surround 3.1
+ case 6: // Surround 5.1
+ case 8: // Surround 7.1
+ channels = strdesc.mChannelsPerFrame;
+ break;
+
+ default:
+ // Unknown number of channels, default to stereo
+ channels = 2;
+ break;
+ }
+
+ mix_rate = GLOBAL_DEF("audio/mix_rate", DEFAULT_MIX_RATE);
+
+ zeromem(&strdesc, sizeof(strdesc));
+ strdesc.mFormatID = kAudioFormatLinearPCM;
+ strdesc.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
+ strdesc.mChannelsPerFrame = channels;
+ strdesc.mSampleRate = mix_rate;
+ strdesc.mFramesPerPacket = 1;
+ strdesc.mBitsPerChannel = 16;
+ strdesc.mBytesPerFrame = strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
+ strdesc.mBytesPerPacket = strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
+
+ result = AudioUnitSetProperty(audio_unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, kOutputBus, &strdesc, sizeof(strdesc));
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+
+ int latency = GLOBAL_DEF("audio/output_latency", DEFAULT_OUTPUT_LATENCY);
+ // Sample rate is independent of channels (ref: https://stackoverflow.com/questions/11048825/audio-sample-frequency-rely-on-channels)
+ buffer_frames = closest_power_of_2(latency * mix_rate / 1000);
+
+#ifdef OSX_ENABLED
+ result = AudioUnitSetProperty(audio_unit, kAudioDevicePropertyBufferFrameSize, kAudioUnitScope_Global, kOutputBus, &buffer_frames, sizeof(UInt32));
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+#endif
+
+ buffer_size = buffer_frames * channels;
+ samples_in.resize(buffer_size);
+
+ if (OS::get_singleton()->is_stdout_verbose()) {
+ print_line("CoreAudio: detected " + itos(channels) + " channels");
+ print_line("CoreAudio: audio buffer frames: " + itos(buffer_frames) + " calculated latency: " + itos(buffer_frames * 1000 / mix_rate) + "ms");
+ }
+
+ AURenderCallbackStruct callback;
+ zeromem(&callback, sizeof(AURenderCallbackStruct));
+ callback.inputProc = &AudioDriverCoreAudio::output_callback;
+ callback.inputProcRefCon = this;
+ result = AudioUnitSetProperty(audio_unit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, kOutputBus, &callback, sizeof(callback));
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+
+ result = AudioUnitInitialize(audio_unit);
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+
+ return OK;
+}
+
+Error AudioDriverCoreAudio::finishDevice() {
+ OSStatus result;
+
+ if (active) {
+ result = AudioOutputUnitStop(audio_unit);
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+
+ active = false;
+ }
+
+ result = AudioUnitUninitialize(audio_unit);
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+
+ return OK;
+}
+
+Error AudioDriverCoreAudio::init() {
+ OSStatus result;
+
+ mutex = Mutex::create();
+ active = false;
+ channels = 2;
+
+#ifdef OSX_ENABLED
+ outputDeviceAddress.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
+ outputDeviceAddress.mScope = kAudioObjectPropertyScopeGlobal;
+ outputDeviceAddress.mElement = kAudioObjectPropertyElementMaster;
+
+ result = AudioObjectAddPropertyListener(kAudioObjectSystemObject, &outputDeviceAddress, &outputDeviceAddressCB, this);
+ ERR_FAIL_COND_V(result != noErr, FAILED);
+#endif
+
+ return initDevice();
+};
+
+Error AudioDriverCoreAudio::reopen() {
+ bool restart = false;
+
+ lock();
+
+ if (active) {
+ restart = true;
+ }
+
+ Error err = finishDevice();
+ if (err != OK) {
+ ERR_PRINT("finishDevice failed");
+ unlock();
+ return err;
+ }
+
+ err = initDevice();
+ if (err != OK) {
+ ERR_PRINT("initDevice failed");
+ unlock();
+ return err;
+ }
+
+ if (restart) {
+ start();
+ }
+
+ unlock();
+
+ return OK;
+}
+
+OSStatus AudioDriverCoreAudio::output_callback(void *inRefCon,
+ AudioUnitRenderActionFlags *ioActionFlags,
+ const AudioTimeStamp *inTimeStamp,
+ UInt32 inBusNumber, UInt32 inNumberFrames,
+ AudioBufferList *ioData) {
+
+ AudioDriverCoreAudio *ad = (AudioDriverCoreAudio *)inRefCon;
+
+ if (!ad->active || !ad->try_lock()) {
+ for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
+ AudioBuffer *abuf = &ioData->mBuffers[i];
+ zeromem(abuf->mData, abuf->mDataByteSize);
+ };
+ return 0;
+ };
+
+ for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
+
+ AudioBuffer *abuf = &ioData->mBuffers[i];
+ int frames_left = inNumberFrames;
+ int16_t *out = (int16_t *)abuf->mData;
+
+ while (frames_left) {
+
+ int frames = MIN(frames_left, ad->buffer_frames);
+ ad->audio_server_process(frames, ad->samples_in.ptr());
+
+ for (int j = 0; j < frames * ad->channels; j++) {
+
+ out[j] = ad->samples_in[j] >> 16;
+ }
+
+ frames_left -= frames;
+ out += frames * ad->channels;
+ };
+ };
+
+ ad->unlock();
+
+ return 0;
+};
+
+void AudioDriverCoreAudio::start() {
+ if (!active) {
+ OSStatus result = AudioOutputUnitStart(audio_unit);
+ if (result != noErr) {
+ ERR_PRINT("AudioOutputUnitStart failed");
+ } else {
+ active = true;
+ }
+ }
+};
+
+int AudioDriverCoreAudio::get_mix_rate() const {
+ return mix_rate;
+};
+
+AudioDriver::SpeakerMode AudioDriverCoreAudio::get_speaker_mode() const {
+ return get_speaker_mode_by_total_channels(channels);
+};
+
+void AudioDriverCoreAudio::lock() {
+ if (mutex)
+ mutex->lock();
+};
+
+void AudioDriverCoreAudio::unlock() {
+ if (mutex)
+ mutex->unlock();
+};
+
+bool AudioDriverCoreAudio::try_lock() {
+ if (mutex)
+ return mutex->try_lock() == OK;
+ return true;
+}
+
+void AudioDriverCoreAudio::finish() {
+ OSStatus result;
+
+ finishDevice();
+
+#ifdef OSX_ENABLED
+ result = AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &outputDeviceAddress, &outputDeviceAddressCB, this);
+ if (result != noErr) {
+ ERR_PRINT("AudioObjectRemovePropertyListener failed");
+ }
+#endif
+
+ AURenderCallbackStruct callback;
+ zeromem(&callback, sizeof(AURenderCallbackStruct));
+ result = AudioUnitSetProperty(audio_unit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, kOutputBus, &callback, sizeof(callback));
+ if (result != noErr) {
+ ERR_PRINT("AudioUnitSetProperty failed");
+ }
+
+ if (mutex) {
+ memdelete(mutex);
+ mutex = NULL;
+ }
+};
+
+AudioDriverCoreAudio::AudioDriverCoreAudio() {
+ active = false;
+ mutex = NULL;
+
+ mix_rate = 0;
+ channels = 2;
+
+ buffer_size = 0;
+ buffer_frames = 0;
+
+ samples_in.clear();
+};
+
+AudioDriverCoreAudio::~AudioDriverCoreAudio(){};
+
+#endif
diff --git a/drivers/coreaudio/audio_driver_coreaudio.h b/drivers/coreaudio/audio_driver_coreaudio.h
new file mode 100644
index 0000000000..33b3ba93ec
--- /dev/null
+++ b/drivers/coreaudio/audio_driver_coreaudio.h
@@ -0,0 +1,89 @@
+/*************************************************************************/
+/* audio_driver_coreaudio.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
+/* */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the */
+/* "Software"), to deal in the Software without restriction, including */
+/* without limitation the rights to use, copy, modify, merge, publish, */
+/* distribute, sublicense, and/or sell copies of the Software, and to */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions: */
+/* */
+/* The above copyright notice and this permission notice shall be */
+/* included in all copies or substantial portions of the Software. */
+/* */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+/*************************************************************************/
+#ifdef COREAUDIO_ENABLED
+
+#ifndef AUDIO_DRIVER_COREAUDIO_H
+#define AUDIO_DRIVER_COREAUDIO_H
+
+#include "servers/audio_server.h"
+
+#include <AudioUnit/AudioUnit.h>
+#ifdef OSX_ENABLED
+#include <CoreAudio/AudioHardware.h>
+#endif
+
+class AudioDriverCoreAudio : public AudioDriver {
+
+ AudioComponentInstance audio_unit;
+#ifdef OSX_ENABLED
+ AudioObjectPropertyAddress outputDeviceAddress;
+#endif
+ bool active;
+ Mutex *mutex;
+
+ int mix_rate;
+ unsigned int channels;
+ unsigned int buffer_frames;
+ unsigned int buffer_size;
+
+ Vector<int32_t> samples_in;
+
+ static OSStatus output_callback(void *inRefCon,
+ AudioUnitRenderActionFlags *ioActionFlags,
+ const AudioTimeStamp *inTimeStamp,
+ UInt32 inBusNumber, UInt32 inNumberFrames,
+ AudioBufferList *ioData);
+
+ Error initDevice();
+ Error finishDevice();
+
+public:
+ const char *get_name() const {
+ return "CoreAudio";
+ };
+
+ virtual Error init();
+ virtual void start();
+ virtual int get_mix_rate() const;
+ virtual SpeakerMode get_speaker_mode() const;
+ virtual void lock();
+ virtual void unlock();
+ virtual void finish();
+
+ bool try_lock();
+ Error reopen();
+
+ AudioDriverCoreAudio();
+ ~AudioDriverCoreAudio();
+};
+
+#endif
+
+#endif
diff --git a/drivers/gles3/rasterizer_scene_gles3.cpp b/drivers/gles3/rasterizer_scene_gles3.cpp
index 0ce6c73f92..eaf0b06664 100644
--- a/drivers/gles3/rasterizer_scene_gles3.cpp
+++ b/drivers/gles3/rasterizer_scene_gles3.cpp
@@ -28,7 +28,7 @@
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "rasterizer_scene_gles3.h"
-
+#include "math_funcs.h"
#include "os/os.h"
#include "project_settings.h"
#include "rasterizer_canvas_gles3.h"
@@ -2534,9 +2534,10 @@ void RasterizerSceneGLES3::_setup_directional_light(int p_index, const Transform
float sign = li->light_ptr->negative ? -1 : 1;
Color linear_col = li->light_ptr->color.to_linear();
- ubo_data.light_color_energy[0] = linear_col.r * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
- ubo_data.light_color_energy[1] = linear_col.g * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
- ubo_data.light_color_energy[2] = linear_col.b * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
+ //compensate normalized diffuse range by multiplying by PI
+ ubo_data.light_color_energy[0] = linear_col.r * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
+ ubo_data.light_color_energy[1] = linear_col.g * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
+ ubo_data.light_color_energy[2] = linear_col.b * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
ubo_data.light_color_energy[3] = 0;
//omni, keep at 0
@@ -2674,9 +2675,9 @@ void RasterizerSceneGLES3::_setup_lights(RID *p_light_cull_result, int p_light_c
float sign = li->light_ptr->negative ? -1 : 1;
Color linear_col = li->light_ptr->color.to_linear();
- ubo_data.light_color_energy[0] = linear_col.r * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
- ubo_data.light_color_energy[1] = linear_col.g * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
- ubo_data.light_color_energy[2] = linear_col.b * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
+ ubo_data.light_color_energy[0] = linear_col.r * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
+ ubo_data.light_color_energy[1] = linear_col.g * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
+ ubo_data.light_color_energy[2] = linear_col.b * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
ubo_data.light_color_energy[3] = 0;
Vector3 pos = p_camera_inverse_transform.xform(li->transform.origin);
@@ -2760,9 +2761,9 @@ void RasterizerSceneGLES3::_setup_lights(RID *p_light_cull_result, int p_light_c
float sign = li->light_ptr->negative ? -1 : 1;
Color linear_col = li->light_ptr->color.to_linear();
- ubo_data.light_color_energy[0] = linear_col.r * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
- ubo_data.light_color_energy[1] = linear_col.g * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
- ubo_data.light_color_energy[2] = linear_col.b * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY];
+ ubo_data.light_color_energy[0] = linear_col.r * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
+ ubo_data.light_color_energy[1] = linear_col.g * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
+ ubo_data.light_color_energy[2] = linear_col.b * sign * li->light_ptr->param[VS::LIGHT_PARAM_ENERGY] * Math_PI;
ubo_data.light_color_energy[3] = 0;
Vector3 pos = p_camera_inverse_transform.xform(li->transform.origin);
diff --git a/drivers/gles3/shaders/scene.glsl b/drivers/gles3/shaders/scene.glsl
index 5c7cfecf3e..41d5ef5bc9 100644
--- a/drivers/gles3/shaders/scene.glsl
+++ b/drivers/gles3/shaders/scene.glsl
@@ -1,5 +1,6 @@
[vertex]
+#define M_PI 3.14159265359
/*
from VisualServer:
@@ -166,7 +167,7 @@ out vec4 specular_light_interp;
void light_compute(vec3 N, vec3 L,vec3 V, vec3 light_color,float roughness,inout vec3 diffuse, inout vec3 specular) {
float dotNL = max(dot(N,L), 0.0 );
- diffuse += dotNL * light_color;
+ diffuse += dotNL * light_color / M_PI;
if (roughness > 0.0) {
@@ -932,7 +933,7 @@ LIGHT_SHADER_CODE
vec3 A = 1.0 + sigma2 * (- 0.5 / (sigma2 + 0.33) + 0.17*diffuse_color / (sigma2 + 0.13) );
float B = 0.45 * sigma2 / (sigma2 + 0.09);
- light_amount = diffuse_color * dotNL * (A + vec3(B) * s / t) / M_PI;
+ light_amount = dotNL * (A + vec3(B) * s / t) / M_PI;
}
#elif defined(DIFFUSE_TOON)
@@ -952,7 +953,7 @@ LIGHT_SHADER_CODE
float FD90 = 0.5 + 2.0 * LoH * LoH * roughness;
float FdV = 1.0 + (FD90 - 1.0) * SchlickFresnel(NoV);
float FdL = 1.0 + (FD90 - 1.0) * SchlickFresnel(NoL);
- light_amount = ( (1.0 / M_PI) * FdV * FdL );
+ light_amount = ( (1.0 / M_PI) * FdV * FdL ) * NoL;
/*
float energyBias = mix(roughness, 0.0, 0.5);
float energyFactor = mix(roughness, 1.0, 1.0 / 1.51);
@@ -965,11 +966,11 @@ LIGHT_SHADER_CODE
}
#else
//lambert
- light_amount = dotNL;
+ light_amount = dotNL / M_PI;
#endif
#if defined(TRANSMISSION_USED)
- diffuse += light_color * diffuse_color * mix(vec3(light_amount),vec3(1.0),transmission) * attenuation;
+ diffuse += light_color * diffuse_color * mix(vec3(light_amount),vec3(M_PI),transmission) * attenuation;
#else
diffuse += light_color * diffuse_color * light_amount * attenuation;
#endif
@@ -1944,18 +1945,19 @@ FRAGMENT_SHADER_CODE
//simplify for toon, as
specular_light *= specular * metallic * albedo * 2.0;
#else
- //brdf approximation (Lazarov 2013)
- float ndotv = clamp(dot(normal,eye_vec),0.0,1.0);
- vec3 dielectric = vec3(0.034) * specular * 2.0;
//energy conservation
- vec3 f0 = mix(dielectric, albedo, metallic);
+ vec3 dielectric = vec3(0.034) * specular * 2.0;
+ vec3 specular_color = mix(dielectric, albedo, metallic);
+ // Environment brdf approximation (Lazarov 2013)
+ // see https://www.unrealengine.com/en-US/blog/physically-based-shading-on-mobile
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
const vec4 c1 = vec4( 1.0, 0.0425, 1.04, -0.04);
vec4 r = roughness * c0 + c1;
+ float ndotv = clamp(dot(normal,eye_vec),0.0,1.0);
float a004 = min( r.x * r.x, exp2( -9.28 * ndotv ) ) * r.x + r.y;
- vec2 brdf = vec2( -1.04, 1.04 ) * a004 + r.zw;
+ vec2 AB = vec2( -1.04, 1.04 ) * a004 + r.zw;
- specular_light *= min(1.0,50.0 * f0.g) * brdf.y + brdf.x * f0;
+ specular_light *= AB.x * specular_color + AB.y;
#endif
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-17 23:23:47 +0000