pathtracer.cpp 13 KB
Newer Older
1
2
3
4
#include "pathtracer.h"

#include <random>

5
6
#include <core/message_tags.h>
#include <core/time.h>
7
#include <pugixml/pugixml.hpp>
8
#include <util/files.h>
unknown's avatar
unknown committed
9
10
11

namespace glare
{
12
	namespace raytrace
unknown's avatar
unknown committed
13
	{
14
15
		Pathtracer::Pathtracer()
			: Pathtracer(std::make_shared<RayGeneratorDefault>())
unknown's avatar
unknown committed
16
17
18
19
		{

		}

20
21
		Pathtracer::Pathtracer(std::shared_ptr<RayGeneratorBase> ray_generator)
			: Pathtracer(std::shared_ptr<SceneCollector>(nullptr), ray_generator)
unknown's avatar
unknown committed
22
23
24
		{
		}

25
26
		Pathtracer::Pathtracer(std::shared_ptr<SceneCollector> collector)
			: Pathtracer(collector, std::make_shared<RayGeneratorDefault>())
unknown's avatar
unknown committed
27
28
29
		{
		}

30
		Pathtracer::Pathtracer(std::shared_ptr<SceneCollector> collector, std::shared_ptr<RayGeneratorBase> ray_generator)
unknown's avatar
unknown committed
31
		{
32
33
34
35
36
37
38
			m_bounce_count_thresholds[unsigned(EffectType::eDiffuse)] = 4;
			m_bounce_count_thresholds[unsigned(EffectType::eTranslucent)] = 6;
			m_bounce_count_thresholds[unsigned(EffectType::eReflection)] = 6;
			m_bounce_count_thresholds[unsigned(EffectType::eRefraction)] = 12;
			m_bounce_count_thresholds[unsigned(EffectType::eTransparent)] = 12;
			m_bounce_count_thresholds[unsigned(EffectType::eEmissive)] = 0;

39
40
41
42
43
44
45
			m_ls_bounce_count_thresholds[unsigned(EffectType::eDiffuse)] = 1;
			m_ls_bounce_count_thresholds[unsigned(EffectType::eTranslucent)] = 3;
			m_ls_bounce_count_thresholds[unsigned(EffectType::eReflection)] = 3;
			m_ls_bounce_count_thresholds[unsigned(EffectType::eRefraction)] = 6;
			m_ls_bounce_count_thresholds[unsigned(EffectType::eTransparent)] = 8;
			m_ls_bounce_count_thresholds[unsigned(EffectType::eEmissive)] = 0;

46
			m_linespace_config.distance_threshold = 8.f;
47
			m_render_config.bounces = 16;
Johannes Braun's avatar
Johannes Braun committed
48
			m_render_shader = std::make_unique<core::Program>(files::shader("/raytracer/pathtracer.comp"));
unknown's avatar
unknown committed
49
50
			m_ray_generator = ray_generator;
			m_trace_buffer = std::make_unique<core::Buffer<gl::BufferType::eShaderStorage>>();
51
52
53

			registerForMessage(tags::scene);

unknown's avatar
unknown committed
54
55
56
57
			if (collector)
				initialize(collector);
		}

58
		Pathtracer::~Pathtracer()
unknown's avatar
unknown committed
59
		{
60
			unregisterForMessage(tags::scene);
unknown's avatar
unknown committed
61
62
		}

63
		void Pathtracer::loadSettings(const fs::path &xml_file)
64
65
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
96
		{
			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[unsigned(EffectType::eDiffuse)] = bounces_child.find_child_by_attribute("item", "name", "diffuse").attribute("value").as_uint(2);
			m_bounce_count_thresholds[unsigned(EffectType::eTranslucent)] = bounces_child.find_child_by_attribute("item", "name", "translucent").attribute("value").as_uint(4);
			m_bounce_count_thresholds[unsigned(EffectType::eReflection)] = bounces_child.find_child_by_attribute("item", "name", "reflect").attribute("value").as_uint(4);
			m_bounce_count_thresholds[unsigned(EffectType::eRefraction)] = bounces_child.find_child_by_attribute("item", "name", "refract").attribute("value").as_uint(8);
			m_bounce_count_thresholds[unsigned(EffectType::eTransparent)] = bounces_child.find_child_by_attribute("item", "name", "transparent").attribute("value").as_uint(8);
			m_bounce_count_thresholds[unsigned(EffectType::eEmissive)] = bounces_child.find_child_by_attribute("item", "name", "emissive").attribute("value").as_uint(1);

			//ls thresholds
			const auto ls_thresholds_child = pt_child.find_child_by_attribute("group", "name", "ls-thresholds");
			m_ls_bounce_count_thresholds[unsigned(EffectType::eDiffuse)] = ls_thresholds_child.find_child_by_attribute("item", "name", "diffuse").attribute("value").as_uint(2);
			m_ls_bounce_count_thresholds[unsigned(EffectType::eTranslucent)] = ls_thresholds_child.find_child_by_attribute("item", "name", "translucent").attribute("value").as_uint(4);
			m_ls_bounce_count_thresholds[unsigned(EffectType::eReflection)] = ls_thresholds_child.find_child_by_attribute("item", "name", "reflect").attribute("value").as_uint(4);
			m_ls_bounce_count_thresholds[unsigned(EffectType::eRefraction)] = ls_thresholds_child.find_child_by_attribute("item", "name", "refract").attribute("value").as_uint(8);
			m_ls_bounce_count_thresholds[unsigned(EffectType::eTransparent)] = ls_thresholds_child.find_child_by_attribute("item", "name", "transparent").attribute("value").as_uint(8);
			m_ls_bounce_count_thresholds[unsigned(EffectType::eEmissive)] = ls_thresholds_child.find_child_by_attribute("item", "name", "emissive").attribute("value").as_uint(1);

			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);
		}

97
		void Pathtracer::reset()
unknown's avatar
unknown committed
98
		{
99
			m_render_config.current_sample = 0;
unknown's avatar
unknown committed
100
			if (m_color_store)
unknown's avatar
unknown committed
101
				gl::clearTextureImage(m_color_store->id(), 0, gl::TextureFormat::eRGBA, gl::Type::eFloat, glm::value_ptr(glm::vec4(0)));
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136

			m_collector->apply(*m_render_shader);

			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);

			if (m_skybox)
			{
				m_render_shader->uniform("u_environment.cubemap", m_skybox->makeResident());
				m_render_shader->uniform("u_environment.has", 1);
			}
			else
			{
				m_render_shader->uniform("u_environment.color", glm::vec4(0.7f, 0.9f, 0.97f, 1));
				m_render_shader->uniform("u_environment.has", 0);
			}

			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);

			unsigned bounce_thresholds = 0;
			for (int i = 0; i < 8; ++i)
			{
				bounce_thresholds |= (m_bounce_count_thresholds[i] & 0xf) << (4 * i);
			}
			m_render_shader->uniform("u_render_config.bounce_thresholds", bounce_thresholds);

			m_linespace_config.bounce_thresholds = 0;
			for (int i = 0; i < 8; ++i)
			{
				m_linespace_config.bounce_thresholds |= (m_ls_bounce_count_thresholds[i] & 0xf) << (4 * i);
			}
			m_render_shader->uniform("u_linespace_properties.bounce_thresholds", m_linespace_config.bounce_thresholds);
137
138
139
140
141
142
143
144
145
146

			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[0]", "sampleGlossy");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[1]", "sampleMirror");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[2]", "sampleDiffuse");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[3]", "sampleRoughGlass");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[4]", "sampleGlass");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[5]", "sampleTranslucent");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[6]", "sampleTransparent");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_bsdf_sample[7]", "sampleEmissive");
			m_render_shader->bindSubroutine(gl::ShaderType::eCompute, "u_light_sample[0]", "samplePoint");
unknown's avatar
unknown committed
147
148
		}

149
		const core::TextureRGBA_32F &Pathtracer::render(uint32_t width, uint32_t height)
unknown's avatar
unknown committed
150
151
152
153
		{
			if (width != m_last_width || height != m_last_height) {
				m_last_width = width;
				m_last_height = height;
154
155
156

				Log_Info << "RESIZED: " << width << ", " << height;

157
				m_trace_buffer->reserve<Trace>(width * height, gl::BufferUsage::eDynamicCopy);
unknown's avatar
unknown committed
158
159
				m_render_target = std::make_unique<core::TextureRGBA_32F>(width, height);
				m_color_store = std::make_unique<core::TextureRGBA_32F>(width, height);
unknown's avatar
unknown committed
160
				
161
162
163
				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);
164
				m_render_config.current_sample = 0;
unknown's avatar
unknown committed
165
			}
166

167
			for (unsigned sample = 0; sample < m_render_config.samples_per_frame; sample++) {
unknown's avatar
unknown committed
168

169
				if (m_render_config.current_sample >= m_render_config.max_samples)
unknown's avatar
unknown committed
170
171
172
					return *m_render_target;

				m_ray_generator->generate(*this);
unknown's avatar
unknown committed
173
				//return *m_render_target;
unknown's avatar
unknown committed
174
				
unknown's avatar
unknown committed
175
				m_render_shader->use();
176
				m_render_shader->uniform("u_render_config.current_sample", m_render_config.current_sample);
Johannes Braun's avatar
Johannes Braun committed
177
				m_render_shader->dispatch2d(width, 4, height, 4);
unknown's avatar
unknown committed
178

179
				++m_render_config.current_sample;
unknown's avatar
unknown committed
180
181
182
183
184
			}

			return *m_render_target;
		}

185
		void Pathtracer::saveRender(fs::path target) const
unknown's avatar
unknown committed
186
		{
unknown's avatar
unknown committed
187
			core::textures::saveTexture(target, *m_render_target);
unknown's avatar
unknown committed
188
189
		}

190
		void Pathtracer::setGenerator(std::shared_ptr<RayGeneratorBase> generator)
unknown's avatar
unknown committed
191
192
193
194
195
		{
			m_ray_generator = generator;
			reset();
		}

196
		void Pathtracer::initialize(std::shared_ptr<SceneCollector> collector)
unknown's avatar
unknown committed
197
198
199
200
201
		{
			m_collector = collector;
			reset();
		}

202
		void Pathtracer::handle(messaging::message_t& message)
unknown's avatar
unknown committed
203
204
205
		{
			switch (message.name)
			{
206
			case tags::scene:
unknown's avatar
unknown committed
207
208
209
210
211
212
				reset();
				break;

			}
		}

Johannes Braun's avatar
Johannes Braun committed
213
		const core::Program& Pathtracer::shader() const
unknown's avatar
unknown committed
214
215
216
217
		{
			return *m_render_shader;
		}

218
		uint32_t Pathtracer::width() const
unknown's avatar
unknown committed
219
220
221
222
		{
			return m_last_width;
		}

223
		uint32_t Pathtracer::height() const
unknown's avatar
unknown committed
224
225
226
227
		{
			return m_last_height;
		}

228
		core::Buffer<gl::BufferType::eShaderStorage>& Pathtracer::traceBuffer() const
unknown's avatar
unknown committed
229
230
231
232
		{
			return *m_trace_buffer;
		}

233
		const core::TextureRGBA_32F& Pathtracer::renderTarget() const
unknown's avatar
unknown committed
234
235
236
237
		{
			return *m_render_target;
		}

238
		std::shared_ptr<SceneCollector> Pathtracer::collector() const
unknown's avatar
unknown committed
239
240
241
		{
			return m_collector;
		}
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
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

		unsigned Pathtracer::currentSample() const
		{
			return m_render_config.current_sample;
		}

		void Pathtracer::setEffectBounces(EffectType type, uint8_t bounces)
		{
			uint8_t clamped = bounces & 0xf;

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

			m_bounce_count_thresholds[unsigned(type)] = clamped;
			reset();
		}

		uint8_t Pathtracer::getEffectBounces(EffectType type)
		{
			return m_bounce_count_thresholds[unsigned(type)];
		}

		void Pathtracer::setLinespaceBounceThresholds(EffectType type, uint8_t bounces)
		{
			uint8_t clamped = bounces & 0xf;

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

			m_ls_bounce_count_thresholds[unsigned(type)] = clamped;
			reset();
		}

		uint8_t Pathtracer::getLinespaceBounceThreshold(EffectType type)
		{
			return m_ls_bounce_count_thresholds[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
375
376
	}
}