+ | Portals

includes/RT.hpp

@@ -41,6 +41,7 @@ struct Vertex {
 # include "objects/Quad.hpp"
 # include "objects/Triangle.hpp"
 # include "objects/Cube.hpp"
+# include "objects/Portal.hpp"
 
 # include "Camera.hpp"
 # include "Window.hpp"

includes/RT/Object.hpp

@@ -42,7 +42,8 @@ class Object
 			PLANE,
 			QUAD,
 			TRIANGLE,
-			CUBE
+			CUBE,
+			PORTAL
     	};
 
     	virtual Type	getType() const = 0;

includes/RT/objects/Portal.hpp

@@ -0,0 +1,70 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   Portal.hpp                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: ycontre <ycontre@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/12/23 19:12:51 by ycontre           #+#    #+#             */
+/*   Updated: 2024/12/23 19:47:09 by ycontre          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef RT_PORTAL__HPP
+# define RT_PORTAL__HPP
+
+# include "RT.hpp"
+
+class Portal : public Object
+{
+	public:
+		Portal(std::stringstream &line) : Object(glm::vec3(0.0f), -1)
+		{
+			try {
+				float	x, y, z;
+				float	x1, y1, z1;
+				float	x2, y2, z2;
+				int		linked_portal;
+				int		mat_index;
+
+				if (!(line >> x >> y >> z))
+					throw std::runtime_error("Missing position");
+
+				if (!(line >> x1 >> y1 >> z1))
+					throw std::runtime_error("Missing Portal's first edge ");
+
+				if (!(line >> x2 >> y2 >> z2))
+					throw std::runtime_error("Missing Portal's second edge");
+				
+				if (!(line >> linked_portal))
+					throw std::runtime_error("Missing Portal's linked index");
+
+				if (!(line >> mat_index))
+					throw std::runtime_error("Missing material properties");
+
+				_position = glm::vec3(x, y, z);
+				_edge1 = glm::vec3(x1, y1, z1);
+				_edge2 = glm::vec3(x2, y2, z2);
+
+				_linked_portal = linked_portal;
+
+				_mat_index = mat_index;
+			}
+			catch (const std::exception &e) { throw; }
+		}
+		Portal(const glm::vec3 &position, const glm::vec3 &edge1, const glm::vec3 &edge2, const int linked_portal, const int mat_index)
+			: Object(position, mat_index), _edge1(edge1), _edge2(edge2), _linked_portal(linked_portal) {}
+
+		glm::vec3	getEdge1() const { return (_edge1); }
+		glm::vec3	getEdge2() const { return (_edge2); }
+		int			getLinkedPortalIndex() const { return (_linked_portal); }
+		Type		getType() const override { return Type::PORTAL; }
+
+	private:
+		glm::vec3	_edge1;
+		glm::vec3	_edge2;
+
+		int			_linked_portal;
+};
+
+#endif

scenes/colored_light.rt

@@ -4,7 +4,7 @@ MAT	255 010 010				5			0.0 1.0
 MAT	010 255 010				5			0.0 1.0
 MAT	010 010 255				5			0.0 1.0
 
-MAT	255 255 255				0		    1.7 1.0 1
+MAT	255 255 255				0		    1.7 1.0 DIE
 
 MAT	255 255 255				0			0.0 1.0
 

scenes/stairs.rt

@@ -1,6 +1,6 @@
 CAM		-7 10 6
 
-MAT		255 255 255		4.0		0.0 0.0 //white light
+MAT		255 255 255		2.0		0.0 0.0 //white light
 
 sp		-10 100 10		50					0
 qu		-2.5 15 -9		7 0 0	0 0 7		0
@@ -66,7 +66,7 @@ MAT		244 95 28		0.0			0.5 1.0
 cu	-9 1.23 -6		3 3 3			29
 
 MAT		200 20 20		0.0			1.0 0.05
-MAT		255 255 255		0.0			1.8 0.0 1
+MAT		255 255 255		0.0			1.8 0.0     DIE
 MAT		255 255 255		0.0			1.0 1.0
 
 sp	0 5 -4				3			30

scenes/test.rt

@@ -6,14 +6,13 @@ MAT 255 255 255     0.0     1.0 1.0 //mirror
 MAT 255 255 255     2.0     0.0 0.0 //sun
 
 MAT 255 100 100     0.0     0.0 0.0 //red
+MAT 100 100 255     0.0     0.0 0.0 //blue
 
 pl  0 0 0          0 1 0   0
-# cu  0 0.5 1           1 1 1   3
+cu  1 0.5 3        1 1 1   3
+cu  1 0.5 -3       1 1 1   4
 
-# tr  -5 0 2     -5 2 2   0 2 2   2
+po  3 0 0       2 0 0   0 2 0   4   0
-# tr  -5 0 2     0 0 2   0 2 2   2
+po  -3 0 0      2 0 0   0 2 0   3   0
 
-qu  -5 0 0      2 0 0   0 2 0   2      //light problem
+sp  0 30 0     30           2
-# qu  -4 0 0   0 0 2   0 2 0   0    //blocking
-
-# sp  0 30 0     30           2

shaders/compute.glsl

@@ -62,9 +62,32 @@ struct hitInfo
 #include "shaders/intersect.glsl"
 #include "shaders/scatter.glsl"
 
+Ray	portalRay(Ray ray, hitInfo hit)
+{
+	GPUObject	portal_1;
+	GPUObject	portal_2;
+	vec3		relative;
+
+	portal_1 = objects[hit.obj_index];
+	portal_2 = objects[int(portal_1.radius)]; // saving memory radius = portal_index
+		
+	vec3 portal_2_normal = normalize(cross(portal_2.vertex1, portal_2.vertex2));
+	portal_2_normal *= sign(dot(ray.direction, portal_2_normal));
+	
+	relative = portal_2.position - portal_1.position;
+	
+	ray.origin = hit.position + relative + portal_2_normal * 0.01;
+	ray.direction = normalize(ray.direction + portal_2_normal * 0.01);
+
+	return (ray);
+}
+
 hitInfo	traceRay(Ray ray)
 {
 	hitInfo hit;
+
+	for (int p = 0; p < 2; p++) //portals
+	{
 		hit.t = 1e30;
 		hit.obj_index = -1;
 		
@@ -81,6 +104,11 @@ hitInfo	traceRay(Ray ray)
 				hit.normal = temp_hit.normal;
 			}
 		}
+		if (hit.obj_index == -1 || objects[hit.obj_index].type != 5)
+			break ;
+		ray = portalRay(ray, hit);
+	}
+
 
 	return (hit);
 }
@@ -105,10 +133,10 @@ vec3    pathtrace(Ray ray, inout uint rng_state)
 		GPUMaterial mat = materials[obj.mat_index];
 		
 		// RR
-		// float p = max(color.r, max(color.g, color.b));
+		float p = max(color.r, max(color.g, color.b));
-        // if (randomValue(rng_state) > p && i > 1)
+        if (randomValue(rng_state) > p && i > 1)
-        //     break;
+            break;
-        // color /= p;
+        color /= p;
 		//
 
 		color *= mat.color;

shaders/intersect.glsl

@@ -153,7 +153,7 @@ bool intersect(Ray ray, GPUObject obj, out hitInfo hit)
         return (intersectSphere(ray, obj, hit));
     if (obj.type == 1)
         return (intersectPlane(ray, obj, hit));
-    if (obj.type == 2)
+    if (obj.type == 2 || obj.type == 5)
         return (intersectQuad(ray, obj, hit));
     if (obj.type == 3)
         return (intersectTriangle(ray, obj, hit));

shaders/random.glsl

@@ -1,3 +1,5 @@
+#define M_PI 3.14159265359
+
 float randomValue(inout uint rng_state)
 {
 	rng_state = rng_state * 747796405u + 2891336453u;
@@ -8,7 +10,7 @@ float randomValue(inout uint rng_state)
 
 float randomValueNormalDistribution(inout uint rng_state)
 {
-	float theta = 2.0 * 3.14159265359 * randomValue(rng_state);
+	float theta = 2.0 * M_PI * randomValue(rng_state);
 	float rho = sqrt(-2.0 * log(randomValue(rng_state)));
 	return (rho * cos(theta));
 }
@@ -27,7 +29,6 @@ vec3 randomHemisphereDirection(vec3 normal, inout uint rng_state)
 	return (direction * sign(dot(normal, direction)));
 }
 
-#define M_PI 3.1415926535897932384626433832795
 
 // vec3 randomHemisphereDirection(vec3 normal, inout uint rng_state)
 // {

srcs/class/Scene.cpp

@@ -106,6 +106,13 @@ void		Scene::updateGPUData()
 			gpu_obj.vertex1 = cube->getSize();
 			gpu_obj.type = static_cast<int>(cube->getType());
 		}
+		else if (obj->getType() == Object::Type::PORTAL)
+		{
+			auto portal = static_cast<const Portal *>(obj);
+			gpu_obj.vertex1 = portal->getEdge1();
+			gpu_obj.vertex2 = portal->getEdge2();
+			gpu_obj.radius = portal->getLinkedPortalIndex();
+		}
 
 		_gpu_objects.push_back(gpu_obj);
 	}

srcs/class/SceneParser.cpp

@@ -43,6 +43,12 @@ SceneParser::SceneParser(Scene *scene) : _scene(scene)
 		try { return (new Cube(ss)); }
 		catch (const std::exception &e) { throw; }
 	};
+	
+	object_parsers["po"] = [](std::stringstream &ss) -> Object *
+	{
+		try { return (new Portal(ss)); }
+		catch (const std::exception &e) { throw; }
+	};
 }
 
 void	SceneParser::parseMaterial(std::stringstream &line)
@@ -51,7 +57,7 @@ void	SceneParser::parseMaterial(std::stringstream &line)
 	float		emission;
 	float		roughness;
 	float		metallic;
-	int			type;
+	std::string	type;
 
 	Material	*mat;
 
@@ -59,7 +65,7 @@ void	SceneParser::parseMaterial(std::stringstream &line)
 		throw std::runtime_error("Material: Missing material properties");
 
 	if (!(line >> type))
-		type = 0;
+		type = "LAM";
 	
 	mat = new Material;
 
@@ -67,7 +73,12 @@ void	SceneParser::parseMaterial(std::stringstream &line)
 	mat->emission = emission;
 	mat->roughness = roughness;
 	mat->metallic = metallic;
-	mat->type = type;
+	
+	mat->type = 0;
+	if (type == "LAM")
+		mat->type = 0;
+	else if (type == "DIE")
+		mat->type = 1;
 
 	_scene->addMaterial(mat);
 }