+ | Handling transformation objects

.vscode/settings.json

@@ -79,7 +79,8 @@
 		"xlocmes": "cpp",
 		"xlocmon": "cpp",
 		"xloctime": "cpp",
-		"xtree": "cpp"
+		"xtree": "cpp",
+		"forward_list": "cpp"
 	},
 	"cmake.ignoreCMakeListsMissing": true
 }

Makefile

@@ -11,7 +11,7 @@ ifeq ($(OS),Windows_NT)
 	LINE_CLR	=	\33[2K\r
 	RM          :=	del /S /Q
 	DIR_DUP     =	if not exist "$(@D)" mkdir "$(@D)"
-	CC          :=	g++
+	CC          :=	g++ -O3
 	IFLAGS	    :=	-I./includes -I./includes/RT -I./includes/imgui
 	LDFLAGS     :=  -L./lib -lglfw3 -lopengl32 -lgdi32 -lcglm
 else

imgui.ini

@@ -5,20 +5,24 @@ Size=400,400
 [Window][Camera]
 Pos=1643,7
 Size=259,200
+Collapsed=1
 
 [Window][Material]
-Pos=1646,209
+Pos=1642,29
 Size=266,299
+Collapsed=1
 
 [Window][Fog settings]
-Pos=1649,509
+Pos=1641,52
 Size=247,130
+Collapsed=1
 
 [Window][Debug]
 Pos=1642,668
 Size=260,143
 
 [Window][Debug BVH]
-Pos=1646,642
+Pos=1641,72
 Size=274,205
+Collapsed=1
 

includes/RT/ObjParser.hpp

@@ -21,7 +21,7 @@ class ObjParser
 		ObjParser(std::string &filename);
 		~ObjParser();
 
-		void	parse(Scene &scene, glm::vec3 offset);
+		void	parse(Scene &scene, glm::vec3 offset, float scale, glm::mat4 transform);
 	
 	private:
 		glm::vec3					getVertex(std::stringstream &line);

includes/RT/Scene.hpp

@@ -88,7 +88,9 @@ struct GPUBvh
 
 struct GPUBvhData
 {
+	glm::mat4				transform;
 	alignas(16) glm::vec3	offset;
+	float					scale;
 
 	int						bvh_start_index;
 	int						triangle_start_index;
@@ -111,7 +113,7 @@ class Scene
 		void							updateLightAndObjects(int mat_id);
 		std::set<int>					getGPULights();
 
-		void							addBvh(std::vector<Triangle> &triangles, glm::vec3 offset);
+		void							addBvh(std::vector<Triangle> &triangles, glm::vec3 offset, float scale, glm::mat4 transform);
 
 		const std::vector<GPUObject>	&getObjectData() const;
 		const std::vector<GPUTriangle>	&getTriangleData() const;

scenes/dragon.rt

@@ -1,4 +1,4 @@
-CAM     1.82501 0.45 -0.0162945     -10 180.6     0.02 2.164		30   5
+CAM     1.82501 0.45 0     -10 180     0.005 2.164		35   5
 
 
 MAT	255 255 255		0.0		1. 0.3 // white 0
@@ -24,8 +24,8 @@ pl	0 -2 0		0 1 0		2 // floor
 
 qu	-1 1.999 -1	2 0 0		0 0 2		6
 
-OBJ obj/Dragon_80K.obj 0 0 0
+OBJ obj/Dragon_80K.obj 0 0 0.5
-OBJ obj/Dragon_80K.obj 0 0 1
+OBJ obj/Dragon_80K.obj 0 0 -0.5	1		0 15 100
 # OBJ obj/teapot.obj
 
 # OBJ obj/Model.obj
@@ -33,4 +33,4 @@ OBJ obj/Dragon_80K.obj 0 0 1
 # OBJ obj/Lowpoly_tree_sample.obj
 
 po  -1.99 -0.5 -0.5           0 1 0   	0 0 1		1	4
-po  -0.5 -0.5 -1.99            	  0 1 0   	1 0 0		0	4
+po  1.99 -0.5 -0.5            0 1 0   	0 0 1		0	4

shaders/compute.glsl

@@ -63,7 +63,9 @@ struct GPUVolume
 
 struct GPUBvhData
 {
+	mat4	transform;
 	vec3	offset;
+	float	scale;
 
 	int		bvh_start_index;
 	int		triangle_start_index;

shaders/debug.glsl

@@ -69,7 +69,9 @@ layout(std430, binding = 2) buffer TriangleBuffer
 
 struct GPUBvhData
 {
+	mat4	transform;
 	vec3	offset;
+	float	scale;
 
 	int		bvh_start_index;
 	int		triangle_start_index;
@@ -210,6 +212,44 @@ hitInfo traceBVH(Ray ray, GPUBvhData bvh_data, inout Stats stats)
 	return (hit);
 }
 
+mat3 rotateX(float angleRadians) {
+    float c = cos(angleRadians);
+    float s = sin(angleRadians);
+    return mat3(
+        1.0, 0.0, 0.0,
+        0.0,   c,  -s,
+        0.0,   s,   c
+    );
+}
+
+mat3 rotateY(float angleRadians) {
+    float c = cos(angleRadians);
+    float s = sin(angleRadians);
+    return mat3(
+         c, 0.0,   s,
+        0.0, 1.0, 0.0,
+        -s, 0.0,   c
+    );
+}
+
+mat3 rotateZ(float angleRadians) {
+    float c = cos(angleRadians);
+    float s = sin(angleRadians);
+    return mat3(
+          c,  -s, 0.0,
+          s,   c, 0.0,
+        0.0, 0.0, 1.0
+    );
+}
+
+mat3 createTransformMatrix(vec3 rotationAngles, float scale) {
+    mat3 rotMatrix = rotateZ(rotationAngles.z) * 
+                    rotateY(rotationAngles.y) * 
+                    rotateX(rotationAngles.x);
+    
+    return rotMatrix * scale;
+}
+
 hitInfo traverseBVHs(Ray ray, inout Stats stats)
 {
 	hitInfo hit;
@@ -219,14 +259,25 @@ hitInfo traverseBVHs(Ray ray, inout Stats stats)
 
 	for (int i = 0; i < u_bvhNum; i++)
 	{
-		ray.origin = i == 0 ? ray.origin : ray.origin + vec3(2., 0., 0.);
+		GPUBvhData bvh_data = BvhData[i];
-		hitInfo temp_hit = traceBVH(ray, BvhData[i], stats);
+		
+		mat3 transformMatrix = mat3(bvh_data.transform);
+		mat3 inverseTransformMatrix = inverse(transformMatrix);
 
+		Ray transformedRay;
+		transformedRay.direction = normalize(transformMatrix * ray.direction);
+		transformedRay.origin = transformMatrix * (ray.origin - bvh_data.offset);
+		transformedRay.inv_direction = (1. / transformedRay.direction);
+		
+		hitInfo temp_hit = traceBVH(transformedRay, BvhData[i], stats);
+
+		temp_hit.t = temp_hit.t / bvh_data.scale;
+		
 		if (temp_hit.t < hit.t)
 		{
 			hit.t = temp_hit.t;
 			hit.obj_index = temp_hit.obj_index;
-			hit.normal = temp_hit.normal;
+			hit.normal = normalize(inverseTransformMatrix * temp_hit.normal);
 		}
 	}
 

shaders/trace.glsl

@@ -118,6 +118,36 @@ hitInfo traceBVH(Ray ray, GPUBvhData bvh_data)
 	return (hit);
 }
 
+// hitInfo traverseBVHs(Ray ray)
+// {
+// 	hitInfo hit;
+	
+// 	hit.t = 1e30;
+// 	hit.obj_index = -1;
+
+// 	for (int i = 0; i < u_bvhNum; i++)
+// 	{
+// 		GPUBvhData bvh_data = BvhData[i];
+
+// 		ray.origin -= bvh_data.offset;
+// 		hitInfo temp_hit = traceBVH(ray, bvh_data);
+
+// 		if (temp_hit.t < hit.t)
+// 		{
+// 			hit.t = temp_hit.t;
+// 			hit.last_t = temp_hit.last_t;
+// 			hit.obj_index = temp_hit.obj_index;
+// 			hit.mat_index = temp_hit.mat_index;
+// 			hit.position = temp_hit.position;
+// 			hit.normal = temp_hit.normal;
+// 		}
+		
+// 		ray.origin += bvh_data.offset;
+// 	}
+
+// 	return (hit);
+// }
+
 hitInfo traverseBVHs(Ray ray)
 {
 	hitInfo hit;
@@ -128,21 +158,28 @@ hitInfo traverseBVHs(Ray ray)
 	for (int i = 0; i < u_bvhNum; i++)
 	{
 		GPUBvhData bvh_data = BvhData[i];
+		
+		mat3 transformMatrix = mat3(bvh_data.transform);
+		mat3 inverseTransformMatrix = inverse(transformMatrix);
 
-		ray.origin -= bvh_data.offset;
+		Ray transformedRay;
-		hitInfo temp_hit = traceBVH(ray, bvh_data);
+		transformedRay.direction = normalize(transformMatrix * ray.direction);
+		transformedRay.origin = transformMatrix * (ray.origin - bvh_data.offset);
+		transformedRay.inv_direction = (1. / transformedRay.direction);
+		
+		hitInfo temp_hit = traceBVH(transformedRay, BvhData[i]);
+
+		temp_hit.t = temp_hit.t / bvh_data.scale;
 
 		if (temp_hit.t < hit.t)
 		{
 			hit.t = temp_hit.t;
-			hit.last_t = temp_hit.last_t;
+			hit.last_t = temp_hit.last_t / bvh_data.scale;
 			hit.obj_index = temp_hit.obj_index;
 			hit.mat_index = temp_hit.mat_index;
-			hit.position = temp_hit.position;
+			hit.position = inverseTransformMatrix * temp_hit.position + bvh_data.offset;
-			hit.normal = temp_hit.normal;
+			hit.normal = normalize(inverseTransformMatrix * temp_hit.normal);
 		}
-		
-		ray.origin += bvh_data.offset;
 	}
 
 	return (hit);

srcs/class/ObjParser.cpp

@@ -240,7 +240,7 @@ void	ObjParser::parseMtl(std::stringstream &input_line, Scene &scene)
 	file.close();
 }
 
-void	ObjParser::parse(Scene &scene, glm::vec3 offset)
+void	ObjParser::parse(Scene &scene, glm::vec3 offset, float scale, glm::mat4 transform)
 {
 	std::string				line;
 	std::string				identifier;
@@ -275,6 +275,6 @@ void	ObjParser::parse(Scene &scene, glm::vec3 offset)
 		}
 	}
 
-	scene.addBvh(_triangles, offset);
+	scene.addBvh(_triangles, offset, scale, transform);
 }
 

srcs/class/Scene.cpp

@@ -142,7 +142,7 @@ void		Scene::addObject(Object *obj)
 	_gpu_objects.push_back(gpu_obj);
 }
 
-void		Scene::addBvh(std::vector<Triangle> &triangles, glm::vec3 offset)
+void		Scene::addBvh(std::vector<Triangle> &triangles, glm::vec3 offset, float scale, glm::mat4 transform)
 {
 	GPUBvhData			new_bvh_data;
 	std::vector<GPUBvh>	new_bvhs_list;
@@ -154,8 +154,9 @@ void		Scene::addBvh(std::vector<Triangle> &triangles, glm::vec3 offset)
 	BVH *bvh = new BVH(triangles, 0, triangles.size());
 	new_bvhs_list = bvh->getGPUBvhs();
 	
-	std::cout << glm::to_string(offset) << std::endl;
+	new_bvh_data.transform = transform * scale;
 	new_bvh_data.offset = offset;
+	new_bvh_data.scale = scale;
 	new_bvh_data.bvh_start_index = _gpu_bvh.size();
 	new_bvh_data.triangle_start_index = _gpu_triangles.size();
 	

srcs/class/SceneParser.cpp

@@ -102,11 +102,21 @@ void		SceneParser::parseObj(std::stringstream &line)
 	float y = 0.;
 	float z = 0.;
 
+	float scale = 1.;
+	
+	float xtransform = 0.;
+	float ytransform = 0.;
+	float ztransform = 0.;
+
 	line >> name;
 	line >> x >> y >> z;
+	line >> scale;
+	line >> xtransform >> ytransform >> ztransform;
+
+	glm::mat4 transform = glm::eulerAngleXYZ(glm::radians(xtransform), glm::radians(ytransform), glm::radians(ztransform));
 
 	ObjParser obj(name);
-	obj.parse(*_scene, glm::vec3(x, y, z));
+	obj.parse(*_scene, glm::vec3(x, y, z), (1.0 / scale), transform);
 }
 
 bool		SceneParser::parseLine(const std::string &line)

srcs/class/Shader.cpp

@@ -67,7 +67,7 @@ Shader::Shader(std::string vertexPath, std::string fragmentPath, std::string com
 	const char *fragmentCode = loadFileWithIncludes(fragmentPath);
 	const char *computeCode = loadFileWithIncludes(computePath);
 
-	// printWithLineNumbers(computeCode);
+	printWithLineNumbers(computeCode);
 
 	_vertex = glCreateShader(GL_VERTEX_SHADER);