pathtracer.cpp 13.4 KB
Newer Older
1
2
#include "pathtracer.h"

3
#include <pugixml/pugixml.hpp>
4
#include <core/rendering/texture_renderer.h>
unknown's avatar
unknown committed
5

6
namespace glare::raytrace
unknown's avatar
unknown committed
7
{
8
9
	Pathtracer::Pathtracer()
		: Pathtracer(RayGeneratorType::eTrace)
unknown's avatar
unknown committed
10
11
	{

12
	}
unknown's avatar
unknown committed
13

14
15
16
	Pathtracer::Pathtracer(std::shared_ptr<core::GraphNode> graph_root)
		: Pathtracer(std::make_shared<SceneCollector>(graph_root))
	{
17

18
	}
19

20
21
22
	Pathtracer::Pathtracer(std::shared_ptr<core::GraphNode> graph_root, RayGeneratorType ray_generator)
		: Pathtracer(std::make_shared<SceneCollector>(graph_root), ray_generator)
	{
23

24
	}
25

26
27
28
29
	Pathtracer::Pathtracer(RayGeneratorType ray_generator)
		: Pathtracer(std::shared_ptr<SceneCollector>(nullptr), ray_generator)
	{
	}
unknown's avatar
unknown committed
30

31
32
33
34
	Pathtracer::Pathtracer(std::shared_ptr<SceneCollector> collector)
		: Pathtracer(collector, RayGeneratorType::eTrace)
	{
	}
unknown's avatar
unknown committed
35

36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
	Pathtracer::Pathtracer(std::shared_ptr<SceneCollector> collector, RayGeneratorType ray_generator)
	{
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eDiffusion)] = 4;
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eReflection)] = 6;
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eTransmission)] = 12;
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eEmission)] = 1;

		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eDiffusion)] = 1;
		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eReflection)] = 3;
		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eTransmission)] = 3;
		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eEmission)] = 6;

		m_linespace_config.distance_threshold = 8.f;
		m_render_config.bounces = 16;
		Log_Hint << "Pathtracing Shader will now be compiled. This might take a couple of seconds.";
		m_render_shader = std::make_unique<core::Program>(files::shader("/pathtracer/pathtracer.comp"));
		m_generator_type = ray_generator;
		m_trace_buffer = std::make_unique<core::Buffer<gl::BufferType::eShaderStorage>>();

		registerForMessage(tags::scene);

		if (collector)
			initialize(collector);
	}
unknown's avatar
unknown committed
60

61
62
63
64
65
	Pathtracer::~Pathtracer()
	{
		if (!core::state::window->isClosing())
			unregisterForMessage(tags::scene);
	}
unknown's avatar
unknown committed
66

67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
	void Pathtracer::loadSettings(const fs::path &xml_file)
	{
		pugi::xml_document preferences_file;
		Log_Info << "Pathtracer settings file load status: " << preferences_file.load_file(xml_file.c_str()).description();

		//Pathtracer
		const auto pt_child = preferences_file.child("pathtracer");

		//bounces
		const auto bounces_child = pt_child.find_child_by_attribute("group", "name", "bounces");
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eDiffusion)] = static_cast<uint8_t>(bounces_child.find_child_by_attribute("item", "name", "diffusion").attribute("value").as_uint(2));
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eReflection)] = static_cast<uint8_t>(bounces_child.find_child_by_attribute("item", "name", "reflection").attribute("value").as_uint(4));
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eTransmission)] = static_cast<uint8_t>(bounces_child.find_child_by_attribute("item", "name", "transmission").attribute("value").as_uint(4));
		m_bounce_count_thresholds[static_cast<unsigned>(EffectType::eEmission)] = static_cast<uint8_t>(bounces_child.find_child_by_attribute("item", "name", "emission").attribute("value").as_uint(8));

		//ls thresholds
		const auto ls_thresholds_child = pt_child.find_child_by_attribute("group", "name", "ls-thresholds");
		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eDiffusion)] = static_cast<uint8_t>(ls_thresholds_child.find_child_by_attribute("item", "name", "diffusion").attribute("value").as_uint(2));
		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eReflection)] = static_cast<uint8_t>(ls_thresholds_child.find_child_by_attribute("item", "name", "reflection").attribute("value").as_uint(4));
		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eTransmission)] = static_cast<uint8_t>(ls_thresholds_child.find_child_by_attribute("item", "name", "transmission").attribute("value").as_uint(4));
		m_ls_bounce_count_thresholds[static_cast<unsigned>(EffectType::eEmission)] = static_cast<uint8_t>(ls_thresholds_child.find_child_by_attribute("item", "name", "emission").attribute("value").as_uint(8));

		m_linespace_config.accuracy_threshold = ls_thresholds_child.find_child_by_attribute("item", "name", "accuracy").attribute("value").as_float(0.5f);
		m_linespace_config.shadow_threshold = ls_thresholds_child.find_child_by_attribute("item", "name", "shadow").attribute("value").as_float(0.5f);
		m_linespace_config.distance_threshold = ls_thresholds_child.find_child_by_attribute("item", "name", "distance").attribute("value").as_float(10.f);

		m_render_config.clamp_direct = pt_child.find_child_by_attribute("item", "name", "clamp-direct").attribute("value").as_float(8);
		m_render_config.clamp_indirect = pt_child.find_child_by_attribute("item", "name", "clamp-indirect").attribute("value").as_float(8);
	}
96

97
98
99
100
101
	void Pathtracer::reset()
	{
		m_render_config.current_sample = 0;
		if (m_color_store)
			gl::clearTextureImage(m_color_store->id(), 0, gl::TextureFormat::eRGBA, gl::Type::eFloat, glm::value_ptr(glm::vec4(0)));
unknown's avatar
unknown committed
102

103
		m_collector->apply(*m_render_shader);
unknown's avatar
unknown committed
104

105
106
107
		m_render_shader->uniform("u_render_config.num_bounces", m_render_config.bounces);
		m_render_shader->uniform("u_render_config.clamp_direct", m_render_config.clamp_direct);
		m_render_shader->uniform("u_render_config.clamp_indirect", m_render_config.clamp_indirect);
108

109
110
111
		m_render_shader->uniform("u_linespace_properties.accuracy_quality", m_linespace_config.accuracy_threshold);
		m_render_shader->uniform("u_linespace_properties.shadow_quality", m_linespace_config.shadow_threshold);
		m_render_shader->uniform("u_linespace_properties.distance_threshold", m_linespace_config.distance_threshold);
112

113
114
		unsigned bounce_thresholds = 0;
		for (int i = 0; i < 4; ++i)
unknown's avatar
unknown committed
115
		{
116
			bounce_thresholds |= (m_bounce_count_thresholds[i] & 0xff) << (8 * i);
unknown's avatar
unknown committed
117
		}
118
		m_render_shader->uniform("u_render_config.bounce_thresholds", bounce_thresholds);
unknown's avatar
unknown committed
119

120
121
		m_linespace_config.bounce_thresholds = 0;
		for (int i = 0; i < 4; ++i)
unknown's avatar
unknown committed
122
		{
123
			m_linespace_config.bounce_thresholds |= (m_ls_bounce_count_thresholds[i] & 0xff) << (8 * i);
unknown's avatar
unknown committed
124
		}
125
		m_render_shader->uniform("u_linespace_properties.bounce_thresholds", m_linespace_config.bounce_thresholds);
unknown's avatar
unknown committed
126

127
128
129
130
131
		m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_light_sample[0]", "samplePoint");
		m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_light_sample[1]", "sampleSpot");
		m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_light_sample[2]", "sampleDirectional");
		m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_light_sample[3]", "sampleAmbient");
	}
132

133
134
135
136
137
	const core::TextureRGBA_32F &Pathtracer::render(uint32_t width, uint32_t height)
	{
		if (width != m_last_width || height != m_last_height) {
			m_last_width = width;
			m_last_height = height;
138

139
140
141
			m_trace_buffer->reserve<Trace>(width * height, gl::BufferUsage::eDynamicCopy);
			m_render_target = std::make_unique<core::TextureRGBA_32F>(width, height);
			m_color_store = std::make_unique<core::TextureRGBA_32F>(width, height);
142

143
144
145
146
			m_render_shader->uniform("u_render_target", m_render_target->makeImageResident(gl::Access::eReadWrite));
			m_render_shader->uniform("u_color_store", m_color_store->makeImageResident(gl::Access::eReadWrite));
			m_render_shader->storageBuffer("trace_buffer", *m_trace_buffer);
			m_render_config.current_sample = 0;
unknown's avatar
unknown committed
147
148
		}

149
		if (m_skybox && m_skybox->isInitialized())
unknown's avatar
unknown committed
150
		{
151
152
			m_render_shader->uniform("u_environment.cubemap", m_skybox->makeResident());
			m_render_shader->uniform("u_environment.has_cubemap", 1);
unknown's avatar
unknown committed
153
		}
154
		else
unknown's avatar
unknown committed
155
		{
156
157
			m_render_shader->uniform("u_environment.color", glm::vec4(0.7f, 0.9f, 0.97f, 1));
			m_render_shader->uniform("u_environment.has_cubemap", 0);
unknown's avatar
unknown committed
158
159
		}

160
		for (unsigned sample = 0; sample < m_render_config.samples_per_frame; sample++) {
unknown's avatar
unknown committed
161

162
163
			if (m_render_config.current_sample >= m_render_config.max_samples)
				return *m_render_target;
unknown's avatar
unknown committed
164

165
166
167
168
			if (debug.print_render_times) core::ClockGL::instance().start();
			const static std::unique_ptr<RayGenerator> ray_generator = std::make_unique<RayGenerator>();
			ray_generator->generate(*this);
			if (debug.print_render_times) Log_Hint << "RENDER TIME [Generate Primary Rays]: " << core::ClockGL::instance().end() << " ns";
unknown's avatar
unknown committed
169

170
171
172
173
174
			if (debug.print_render_times) core::ClockGL::instance().start();
			m_render_shader->use();
			m_render_shader->uniform("u_render_config.current_sample", m_render_config.current_sample);
			m_render_shader->dispatch2d(width, 16, height, 16);
			if (debug.print_render_times) Log_Hint << "RENDER TIME [Trace and Bounce]: " << core::ClockGL::instance().end() << " ns";
unknown's avatar
unknown committed
175

176
			++m_render_config.current_sample;
unknown's avatar
unknown committed
177
		}
178

179
180
		return *m_render_target;
	}
181

182
183
184
185
186
	void Pathtracer::draw(std::shared_ptr<core::GraphNode> node)
	{
		// If it's not manually initialized via the GUI button, initialize the Pathtracer here.
		if (!m_collector)
			reload(node);
187

188
189
190
		static const std::shared_ptr<core::TextureRenderer> texture_renderer = core::DefaultTextureRenderers::makeSimpleRenderer();
		texture_renderer->draw(render(core::state::window->getWidth(), core::state::window->getHeight()));
	}
191

192
193
194
195
	void Pathtracer::saveRender(fs::path target) const
	{
		core::textures::saveTexture(target, *m_render_target);
	}
196

197
198
199
200
201
	void Pathtracer::setGenerator(RayGeneratorType generator)
	{
		m_generator_type = generator;
		reset();
	}
202

203
204
205
206
	RayGeneratorType Pathtracer::getGenerator() const
	{
		return m_generator_type;
	}
207

208
209
210
211
	void Pathtracer::initialize(std::shared_ptr<SceneCollector> collector)
	{
		m_collector = collector;
		m_collector->collect();
212

213
214
215
		m_skybox = core::state::skybox;
		reset();
	}
216

217
218
219
	void Pathtracer::reload(std::shared_ptr<core::GraphNode> graph_root)
	{
		if (!m_collector)
220
		{
221
			m_collector = std::make_shared<SceneCollector>(graph_root);
222
		}
223
		else
224
		{
225
226
			m_collector->setDirty(DirtyFlags::eAll);
			m_collector->collect(graph_root);
227
228
		}

229
230
231
		m_skybox = core::state::skybox;
		reset();
	}
232

233
234
235
	void Pathtracer::handle(messaging::message_t& message)
	{
		switch (message.name)
236
		{
237
		case tags::scene:
238
			reset();
239
240
			break;
		default: break;
241
		}
242
	}
243

244
245
246
247
	const core::Program& Pathtracer::shader() const
	{
		return *m_render_shader;
	}
248

249
250
251
252
	uint32_t Pathtracer::width() const
	{
		return m_last_width;
	}
253

254
255
256
257
	uint32_t Pathtracer::height() const
	{
		return m_last_height;
	}
258

259
260
261
262
	core::Buffer<gl::BufferType::eShaderStorage>& Pathtracer::traceBuffer() const
	{
		return *m_trace_buffer;
	}
263

264
265
266
267
	const core::TextureRGBA_32F& Pathtracer::renderTarget() const
	{
		return *m_render_target;
	}
268

269
270
271
272
	std::shared_ptr<SceneCollector> Pathtracer::collector() const
	{
		return m_collector;
	}
273

274
275
276
277
	unsigned Pathtracer::currentSample() const
	{
		return m_render_config.current_sample;
	}
278

279
280
281
	void Pathtracer::setEffectBounces(EffectType type, uint8_t bounces)
	{
		uint8_t clamped = bounces & 0xff;
282

283
		if (clamped != bounces)
284
		{
285
			Log_Warn << bounces << " - value larger than 15 (0xf). Result of " << clamped << " may be unintended.";
286
287
		}

288
289
290
		m_bounce_count_thresholds[static_cast<unsigned>(type)] = clamped;
		reset();
	}
291

292
293
294
295
	uint8_t Pathtracer::getEffectBounces(EffectType type)
	{
		return m_bounce_count_thresholds[static_cast<unsigned>(type)];
	}
296

297
298
299
	void Pathtracer::setLinespaceBounceThresholds(EffectType type, uint8_t bounces)
	{
		uint8_t clamped = bounces & 0xff;
300

301
		if (clamped != bounces)
302
		{
303
			Log_Warn << bounces << " - value larger than 15 (0xf). Result of " << clamped << " may be unintended.";
304
305
		}

306
307
308
		m_ls_bounce_count_thresholds[unsigned(type)] = clamped;
		reset();
	}
309

310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
	uint8_t Pathtracer::getLinespaceBounceThreshold(EffectType type)
	{
		return m_ls_bounce_count_thresholds[static_cast<unsigned>(type)];
	}

	void Pathtracer::setSkybox(std::shared_ptr<core::Skybox> skybox)
	{
		m_skybox = skybox;
		reset();
	}

	std::shared_ptr<core::Skybox> Pathtracer::getSkybox() const
	{
		return m_skybox;
	}

	void Pathtracer::setBounces(unsigned count)
	{
		reset();
		m_render_config.bounces = count;
	}

	unsigned Pathtracer::getBounces() const
	{
		return m_render_config.bounces;
	}

	void Pathtracer::setMaxSamples(unsigned count)
	{
		m_render_config.max_samples = count;
	}

	unsigned Pathtracer::getMaxSamples() const
	{
		return m_render_config.max_samples;
	}

	void Pathtracer::setSamplesPerFrame(unsigned count)
	{
		m_render_config.samples_per_frame = count;
	}

	unsigned Pathtracer::getSamplesPerFrame() const
	{
		return m_render_config.samples_per_frame;
	}

	void Pathtracer::setClampDirect(float clamp_direct)
	{
		m_render_config.clamp_direct = clamp_direct; reset();
	}

	float Pathtracer::getClampDirect() const
	{
		return m_render_config.clamp_direct;
	}

	void Pathtracer::setClampIndirect(float clamp_indirect)
	{
		m_render_config.clamp_indirect = clamp_indirect; reset();
	}

	float Pathtracer::getClampIndirect() const
	{
		return m_render_config.clamp_indirect;
	}

	void Pathtracer::setAccuracyThreshold(float accuracy_threshold)
	{
		m_linespace_config.accuracy_threshold = accuracy_threshold; reset();
	}

	float Pathtracer::getAccuracyThreshold() const
	{
		return m_linespace_config.accuracy_threshold;
	}

	void Pathtracer::setShadowThreshold(float shadow_threshold)
	{
		m_linespace_config.shadow_threshold = shadow_threshold; reset();
	}

	float Pathtracer::getShadowThreshold() const
	{
		return m_linespace_config.shadow_threshold;
	}

	void Pathtracer::setDistanceThreshold(float distance_threshold)
	{
		m_linespace_config.distance_threshold = distance_threshold; reset();
	}

	float Pathtracer::getDistanceThreshold() const
	{
		return m_linespace_config.distance_threshold;
unknown's avatar
unknown committed
405
406
	}
}