From 4172869e54093eee6e1595ebe0fa55c9fe98aef7 Mon Sep 17 00:00:00 2001 From: hachem Date: Fri, 15 Aug 2025 03:18:29 +0200 Subject: [help]: Complete first geodesic 3d raytracing --- src/Engine/Object.h | 43 ++++++++++++++++++++++++++++++++++++++----- 1 file changed, 38 insertions(+), 5 deletions(-) (limited to 'src/Engine/Object.h') diff --git a/src/Engine/Object.h b/src/Engine/Object.h index 0ae3430..ea672db 100644 --- a/src/Engine/Object.h +++ b/src/Engine/Object.h @@ -10,7 +10,9 @@ namespace Donut glm::vec3 m_Direction; glm::vec3 m_Origin; - Ray(glm::vec3 o, glm::vec3 d); + Ray(glm::vec3 o, glm::vec3 d) + : m_Origin(o), + m_Direction(glm::normalize(d)) { } }; class Material @@ -20,7 +22,10 @@ namespace Donut float m_Specular; float m_Emission; - Material(glm::vec3 c, float s, float e); + Material(glm::vec3 c, float s, float e) + : m_Color(c), + m_Specular(s), + m_Emission(e) { } }; class Object @@ -30,9 +35,37 @@ namespace Donut float m_Radius; Material m_Material; - Object(glm::vec3 c, float r, Material m); + Object(glm::vec3 c, float r, Material m) + : m_Centre(c), + m_Radius(r), + m_Material(m) { } - bool Intersect(Ray &ray, float &t); - glm::vec3 GetNormal(glm::vec3 &point) const; + bool Intersect(Ray &ray, float &t) + { + glm::vec3 oc = ray.m_Origin - m_Centre; + float a = glm::dot(ray.m_Direction, ray.m_Direction); + float b = 2.0f * glm::dot(oc, ray.m_Direction); + float c = glm::dot(oc, oc) - m_Radius * m_Radius; + double discriminant = b*b - 4*a*c; + + if(discriminant < 0) + return false; + + float intercept = (-b - sqrt(discriminant)) / (2.0f*a); + if(intercept < 0) + { + intercept = (-b + sqrt(discriminant)) / (2.0f*a); + if(intercept<0) + return false; + } + + t = intercept; + return true; + } + + glm::vec3 GetNormal(glm::vec3 &point) const + { + return glm::normalize(point - m_Centre); + } }; }; -- cgit v1.3