Several fixes

assets/imgui/config.ini

@@ -4,12 +4,12 @@ Size=353,64
 Collapsed=0
 
 [Scene]
-Pos=0,72
+Pos=-2,66
 Size=352,837
 Collapsed=0
 
 [Settings]
-Pos=1128,-2
+Pos=1125,0
 Size=311,899
 Collapsed=0
 

assets/preferences/linespace_default.xml

 <linespace version="1.0">
-		<item name="subdivisions" value="10"/>
-		<item name="grid-subdivisions" value="10"/>
+		<item name="subdivisions" value="20"/>
+		<item name="grid-subdivisions" value="2"/>
 		<item name="radial-subdivision" value="50"/>
 		<item name="generator" value="gpu"/>
 </linespace>

assets/shaders/pathtracer/data/mesh_datastructure.glsl

@@ -73,6 +73,7 @@ Mesh getMesh(const in Scene scene, int index)
 
 bool traverseObjects(const in Scene scene, const in Ray ray, const in bool use_first, const in float max_distance, inout Hit hit, inout float t_min, bool force_bvh = false)
 {
+	hit.invalidate();
 	if(!use_global_bvh)
 	{
 		float current_t = t_min;
@@ -119,7 +120,7 @@ bool traverseObjects(const in Scene scene, const in Ray ray, const in bool use_f
 					
 					for(;;)
 					{
-						int ls_index = index.x + index.y * mesh.grid_linespace.grid_resolution.x + index.z * mesh.grid_linespace.grid_resolution.y * mesh.grid_linespace.grid_resolution.z;
+						int ls_index = index.x + index.y * mesh.grid_linespace.grid_resolution.x + index.z * mesh.grid_linespace.grid_resolution.x * mesh.grid_linespace.grid_resolution.y;
 						
 						int axis = smallestAxis(tnext);
 						

assets/shaders/pathtracer/data/mesh_linespace.glsl

@@ -138,7 +138,7 @@ bool traverseLineSpace(const in Mesh mesh, int index, const in Ray local_ray, co
 	if (mesh.grid_linespace.linespaces[index].line_count == 0) return false;
 
 	Ray loc = local_ray;
-	loc.origin += 0.05f * loc.direction;
+	loc.origin += 1e-4f * loc.direction;
 
 	if(!loc.intersectsBounds(mesh.grid_linespace.linespaces[index].bounds, tmin, tmax, face_tmin, face_tmax) || t_min <= tmin || tmin > max_distance)
 	{

assets/shaders/pathtracer/generators/bvh/bvh_raygenerator.comp

@@ -10,9 +10,10 @@
 
 layout(local_size_variable) in;
 
-layout(rgba32f) uniform image2D u_render_target;
+layout(rgba32f) uniform image2D render_target;
 uniform int random_seed;
 uniform bool use_linespace = false;
+uniform bool random_subpixel = false;
 
 uniform Scene scene;
 layout(std430) buffer trace_buffer
@@ -20,20 +21,15 @@ layout(std430) buffer trace_buffer
   Trace traces_data[];
 };
 
-uniform struct
-{
-	bool u_random_subpixel; //defaults to false.
-} settings;
-
 void main()
 {
-	ivec2 target_size = u_render_target.imageSize();
+	ivec2 target_size = render_target.imageSize();
 	if (!(int(gl_GlobalInvocationID.x) < target_size.x && int(gl_GlobalInvocationID.y) < target_size.y))
 		return;
 
 	int id = target_size.x * int(gl_GlobalInvocationID.y) + int(gl_GlobalInvocationID.x);
 
-	vec2 random = settings.u_random_subpixel ? vec2(0, 0) : rand2D(random_seed + id, target_size.x*target_size.y);
+	vec2 random = random_subpixel ? rand2D(random_seed + id, target_size.x*target_size.y) : vec2(0, 0);
 	traces_data[id].ray = scene.camera.getRayFromPixel(vec2(gl_GlobalInvocationID.xy), random, vec2(target_size));
 	traces_data[id].hit.invalidate();
 	scene.nearestIntersection(traces_data[id].ray, traces_data[id].hit, !use_linespace);

assets/shaders/pathtracer/generators/gbuffer/depthtest.comp

@@ -6,7 +6,7 @@
 #include <util/tracing/scene.glsl>
 #include <util/math/random.glsl>
 
-layout(rgba32f) uniform image2DMS u_gbuffer_texture_01;
+layout(rgba32f) uniform image2D u_gbuffer_texture_01;
 layout(rgba32f) uniform image2D u_render_target;
 uniform int random_seed;
 uniform int samples;
@@ -28,7 +28,7 @@ void main()
 		ivec2 target_size = u_render_target.imageSize();
 		vec2 random = rand2D(random_seed + int(id), target_size.x * target_size.y);
 		vec2 pixel = vec2(id%target_size.x, id/target_size.x) + random;
-		vec4 texel_01 = u_gbuffer_texture_01.imageLoad(ivec2(pixel), int(random.x * samples));
+		vec4 texel_01 = u_gbuffer_texture_01.imageLoad(ivec2(pixel));
 
 		traces_data[id].ray = scene.camera.getRayFromPixel(pixel, random, vec2(target_size));
 		traces_data[id].hit.invalidate();

assets/shaders/pathtracer/generators/gbuffer/gbuffer.geom

@@ -7,9 +7,9 @@ layout(triangle_strip, max_vertices = 3) out;
 
 #include <util/scene/mesh.glsl>
 #include <util/math/geometry.glsl>
+#include <util/tracing/scene.glsl>
 
-#include <pathtracer/buffers.glsl>
-
+Scene scene;
 uniform mat4 u_mvp;
 
 uniform uint u_mesh_id;
@@ -21,7 +21,7 @@ void main()
 {
 	triangle_id = int(gl_in[0].gl_Position.x);
 
-	Mesh mesh = meshes_data[u_mesh_id];
+	Mesh mesh = scene.meshes[u_mesh_id];
 
 	Triangle current = mesh.triangles[triangle_id];
 

assets/shaders/pathtracer/pathtracer.comp

@@ -36,7 +36,6 @@ uniform int sampels_max = 80000;
 uniform int samples_per_frame = 1;
 
 layout(rgba32f) uniform image2D render_target;
-
 layout(std430) buffer trace_buffer
 {
   Trace traces_data[];
@@ -76,20 +75,6 @@ struct Bounce
 ////
 //////////////////////////////////////////////////////////////////////////
 
-int iArray(const in int array[num_effects], int index)
-{
-	for(int i=0; i<num_effects; ++i)
-		if(i==index)
-			return array[i];
-}
-
-int iArrayComp(const in int array1[num_effects], const in int array2[num_effects], int index)
-{
-	for(int i=0; i<num_effects; ++i)
-		if(i==index)
-			return array1[i] < array2[i] ? 1 : (array1[i] > array2[i] ? -1 : 0);
-}
-
 subroutine uniform lightSample sampleLightRoutines[4];
 LightData sampleLight(const in Light light, const in Vertex vertex, const in vec2 random_sample)
 {
@@ -108,6 +93,13 @@ LightData sampleLight(const in Light light, const in Vertex vertex, const in vec
 	return result;
 }
 
+int iArrayComp(const in int array1[num_effects], const in int array2[num_effects], int index)
+{
+	for(int i=0; i<num_effects; ++i)
+		if(i==index)
+			return array1[i] < array2[i] ? 1 : (array1[i] > array2[i] ? -1 : 0);
+}
+
 bool shouldUseBvh(const in Bounce bounce)
 {
 	return (bounce.pdf_accumulation > (1-linespace_accuracy))
@@ -153,8 +145,6 @@ bool shade(inout Bounce bounce)
 
 	BSDFResult bsdf_result = material.computeBSDF(random_sample, vertex, bounce.ray);
 
-	bounce.path_distance += distance(bounce.ray.origin, vertex.position.xyz);
-
 	bool exceeds_bounces = false;
 	for(int i=0; i<num_effects; ++i)
 	{
@@ -166,6 +156,7 @@ bool shade(inout Bounce bounce)
 		}
 	}
 
+	bounce.path_distance += distance(bounce.ray.origin, vertex.position.xyz);
 	bounce.bsdf_id = int(bsdf_result.bsdf_id);
 	bounce.pdf_accumulation *= bsdf_result.probability_density;
 	bounce.ray = bsdf_result.generated_ray;
@@ -199,13 +190,6 @@ bool shade(inout Bounce bounce)
 	return true;
 }
 
-void trace(inout Bounce bounce)
-{
-	//Invalidate before intersection test so that we don't have to conditionally invalidate afterwards
-	bounce.hit.invalidate();
-	scene.nearestIntersection(bounce.ray, bounce.hit, shouldUseBvh(bounce));
-}
-
 void main()
 {
 	ivec2 target_size = render_target.imageSize();
@@ -215,12 +199,9 @@ void main()
 	if (!(int(gl_GlobalInvocationID.x) < target_size.x && int(gl_GlobalInvocationID.y) < target_size.y))
 		return;
 
-	// Get the trace generated by the external primary-ray-generator and initialize the Bounce struct.
-	Trace current = traces_data[id];
-
 	Bounce bounce;
-	bounce.hit = current.hit;
-	bounce.ray = current.ray;
+	bounce.hit = traces_data[id].hit;
+	bounce.ray = traces_data[id].ray;
 	bounce.path_distance = 0;
 	bounce.pdf_accumulation = 1.f;
 	bounce.bounce_amount = int[num_effects](0,0,0,0);
@@ -232,7 +213,7 @@ void main()
 	// continue with first-trace-then-shade until either shade returns false (not hitting something or constribution too low)
 	// or we exceed the global bounce limit.
 	for (bounce.count = 1; bounce.shade() && bounce.count <= bounce_count; ++bounce.count) {
-		bounce.trace();
+		scene.nearestIntersection(bounce.ray, bounce.hit, shouldUseBvh(bounce));
 	}
 
 	ivec2 pixel = ivec2(bounce.ray.px, bounce.ray.py);

src/executables/pathtracing/main.cpp

@@ -529,7 +529,7 @@ void drawSettingsWindow()
 						static auto effectBounces = [](const std::string &label, raytrace::Effect effect)
 						{
 							if (int val = pathtracer->getBounceThreshold(effect); ImGui::DragInt(label.c_str(), &val, 0.1f, 0, 255))
-								pathtracer->setBounceThreshold(effect, static_cast<uint8_t>(val));
+								pathtracer->setBounceThreshold(effect, val);
 						};
 
 						effectBounces("Diffusion", raytrace::Effect::eDiffusion);
@@ -577,7 +577,7 @@ void drawSettingsWindow()
 					static auto bounceControl = [](const std::string &label, raytrace::Effect effect)
 					{
 						if (int val = pathtracer->getLinespaceBounces(effect); ImGui::DragInt(label.c_str(), &val, 0.1f, 0, pathtracer->getLinespaceBounces(effect)))
-							pathtracer->setLinespaceBounces(effect, static_cast<uint8_t>(val));
+							pathtracer->setLinespaceBounces(effect, val);
 					};
 
 					bounceControl("Diffusion", raytrace::Effect::eDiffusion);

src/libraries/raytrace/data/collector_units/camera.cpp

@@ -12,15 +12,6 @@
 
 namespace glare::raytrace
 {
-	CameraCollector::CameraCollector()
-	{
-
-	}
-
-	CameraCollector::~CameraCollector()
-	{
-
-	}
 
 	void CameraCollector::clear(const math::Flags &flags)
 	{
@@ -50,9 +41,9 @@ namespace glare::raytrace
 
 	}
 
-	void CameraCollector::apply(core::Program &program)
+	void CameraCollector::apply(core::Program &program, const std::string& uniform_name)
 	{
 		if(!m_cameras.empty())
-			program.uniformStruct("scene.camera", m_cameras[m_active_camera]);
+			program.uniformStruct(uniform_name + ".camera", m_cameras[m_active_camera]);
 	}
 }

src/libraries/raytrace/data/collector_units/camera.h

@@ -16,19 +16,17 @@ namespace glare::raytrace
 	class CameraCollector : public CollectorUnit
 	{
 	public:
-		CameraCollector();
+		CameraCollector() = default;
 		CameraCollector(CameraCollector& other) = default;
 		CameraCollector(CameraCollector&& other) = default;
 		CameraCollector& operator=(CameraCollector& other) = default;
 		CameraCollector& operator=(CameraCollector&& other) = default;
 
-		~CameraCollector() override;
-
 		void clear(const math::Flags &flags) override;
 		void collect(const math::Flags &flags, const core::SceneNode &node) override;
 		void build(const math::Flags &flags) override;
 
-		void apply(core::Program &program) override;
+		void apply(core::Program &program, const std::string& uniform_name) override;
 
 	private:
 		unsigned m_active_camera = 0;

src/libraries/raytrace/data/collector_units/light.cpp

@@ -11,9 +11,6 @@
 
 namespace glare::raytrace
 {
-	LightCollector::LightCollector() {}
-	LightCollector::~LightCollector() {}
-
 	void LightCollector::clear(const math::Flags &flags)
 	{
 		if (flags & DirtyFlags::eLight)
@@ -39,9 +36,9 @@ namespace glare::raytrace
 		}
 	}
 
-	void LightCollector::apply(core::Program &program)
+	void LightCollector::apply(core::Program &program, const std::string& uniform_name)
 	{
-		program.uniform("scene.lights", m_lights.empty() ? 0 : m_light_buffer.makeResident(gl::Access::eReadOnly));
-		program.uniform("scene.num_lights", static_cast<int>(m_lights.size()));
+		program.uniform(uniform_name + ".lights", m_lights.empty() ? 0 : m_light_buffer.makeResident(gl::Access::eReadOnly));
+		program.uniform(uniform_name + ".num_lights", static_cast<int>(m_lights.size()));
 	}
 }
\ No newline at end of file

src/libraries/raytrace/data/collector_units/light.h

@@ -17,19 +17,17 @@ namespace glare::raytrace
 	class LightCollector : public CollectorUnit
 	{
 	public:
-		LightCollector();
+		LightCollector() = default;
 		LightCollector(LightCollector& other) = default;
 		LightCollector(LightCollector&& other) = default;
 		LightCollector& operator=(LightCollector& other) = default;
 		LightCollector& operator=(LightCollector&& other) = default;
-
-		~LightCollector() override;
-
+		
 		void clear(const math::Flags &flags) override;
 		void collect(const math::Flags &flags, const core::SceneNode &node) override;
 		void build(const math::Flags &flags) override;
 
-		void apply(core::Program &program) override;
+		void apply(core::Program &program, const std::string& uniform_name) override;
 
 	private:
 		core::Buffer m_light_buffer;

src/libraries/raytrace/data/collector_units/mesh.cpp

@@ -79,12 +79,12 @@ namespace glare::raytrace
 		return m_use_bvh;
 	}
 
-	void MeshCollector::apply(core::Program &program)
+	void MeshCollector::apply(core::Program &program, const std::string& uniform_name)
 	{
-		program.uniform("scene.meshes", m_meshes.empty() ? 0 : m_mesh_buffer.makeResident(gl::Access::eReadOnly));
-		program.uniform("scene.bvh_nodes", m_global_bvh.nodes().empty() ? 0 : m_global_bvh.buffer().makeResident(gl::Access::eReadOnly));
-		program.uniform("scene.num_meshes", static_cast<int>(m_meshes.size()));
-		program.uniform("scene.global_bvh", m_use_bvh);
+		program.uniform(uniform_name + ".meshes", m_meshes.empty() ? 0 : m_mesh_buffer.makeResident(gl::Access::eReadOnly));
+		program.uniform(uniform_name + ".bvh_nodes", m_global_bvh.nodes().empty() ? 0 : m_global_bvh.buffer().makeResident(gl::Access::eReadOnly));
+		program.uniform(uniform_name + ".num_meshes", static_cast<int>(m_meshes.size()));
+		program.uniform(uniform_name + ".global_bvh", m_use_bvh);
 	}
 
 	void MeshCollector::collectMeshRenderer(std::shared_ptr<core::MeshDrawable> mesh_renderer)
@@ -157,7 +157,7 @@ namespace glare::raytrace
 			size_t id = mesh_ids[i];
 			m_id_mapping[id] = i;
 			const auto &collector = m_local_collectors[id];
-			m_meshes[i] = collector.collector->makeMesh(m_material_buffer.makeResident(gl::Access::eReadOnly) + static_cast<uint64_t>(m_material_filter[collector.collector->materialID()]), collector.transform);
+			m_meshes[i] = collector.collector->makeMesh(m_material_buffer.makeResident(gl::Access::eReadOnly) + sizeof(Material) * static_cast<uint64_t>(m_material_filter[collector.collector->materialID()]), collector.transform);
 			m_meshes[i].id = i;
 			mesh_ids[i] = i;
 		}

src/libraries/raytrace/data/collector_units/mesh.h

@@ -24,13 +24,12 @@ namespace glare::raytrace
 		MeshCollector(MeshCollector&& other) = default;
 		MeshCollector& operator=(MeshCollector& other) = default;
 		MeshCollector& operator=(MeshCollector&& other) = default;
-		~MeshCollector() override = default;
 
 		void clear(const math::Flags &flags) override;
 		void collect(const math::Flags &flags, const core::SceneNode &node) override;
 		void build(const math::Flags &flags) override;
 
-		void apply(core::Program &program) override;
+		void apply(core::Program &program, const std::string& uniform_name) override;
 
 		const std::map<size_t, InstancedCollector>& localCollectors() const;
 		const std::map<size_t, size_t>& idMapping() const;

src/libraries/raytrace/data/collector_units/skybox.cpp

@@ -10,9 +10,6 @@
 
 namespace glare::raytrace
 {
-	SkyboxCollector::SkyboxCollector() {}
-	SkyboxCollector::~SkyboxCollector() {}
-	
 	void SkyboxCollector::collect(const math::Flags &flags, const core::SceneNode &node)
 	{
 		if (flags & DirtyFlags::eSkybox)
@@ -23,16 +20,16 @@ namespace glare::raytrace
 		}
 	}
 
-	void SkyboxCollector::apply(core::Program &program)
+	void SkyboxCollector::apply(core::Program &program, const std::string& uniform_name)
 	{
 		if (m_skybox)
 		{
-			program.uniformStruct("scene.environment", *m_skybox);
+			program.uniformStruct(uniform_name + ".environment", *m_skybox);
 		}
 		else
 		{
-			program.uniform("scene.environment.color", glm::vec4(0.7f, 0.9f, 0.97f, 1));
-			program.uniform("scene.environment.has_cubemap", 0);
+			program.uniform(uniform_name + ".environment.color", glm::vec4(0.7f, 0.9f, 0.97f, 1));
+			program.uniform(uniform_name + ".environment.has_cubemap", 0);
 		}
 	}