From eab7b922856b236943985ca53ee08f01aebf3a11 Mon Sep 17 00:00:00 2001
From: Yoel <s73017@beuth-hochschule.de>
Date: Fri, 22 Jan 2021 11:49:50 +0100
Subject: [PATCH] Added base for reflective material. Currently same as diffuse
---
RayTracer/material/ReflectiveMaterial.cpp | 60 +++++++++++++++++++++++
RayTracer/material/ReflectiveMaterial.h | 30 ++++++++++++
2 files changed, 90 insertions(+)
create mode 100644 RayTracer/material/ReflectiveMaterial.cpp
create mode 100644 RayTracer/material/ReflectiveMaterial.h
diff --git a/RayTracer/material/ReflectiveMaterial.cpp b/RayTracer/material/ReflectiveMaterial.cpp
new file mode 100644
index 0000000..d32cb33
--- /dev/null
+++ b/RayTracer/material/ReflectiveMaterial.cpp
@@ -0,0 +1,60 @@
+#define _USE_MATH_DEFINES
+#include "ReflectiveMaterial.h"
+
+#include <cassert>
+
+#include "../tools/Random.h"
+#include "texture/Constant.h"
+
+namespace material {
+ReflectiveMaterial::ReflectiveMaterial(
+ const std::shared_ptr<util::Sampler>& albedo_texture,
+ const std::shared_ptr<util::Sampler>& emission_texture, float clearness)
+ : albedo_texture(albedo_texture),
+ emission_texture(emission_texture),
+ clearness(clearness) {
+}
+ReflectiveMaterial::ReflectiveMaterial(
+ const std::shared_ptr<util::Sampler>& albedo_texture, float clearness)
+ : albedo_texture(albedo_texture),
+ emission_texture(
+ std::make_shared<Constant>(Constant(util::Vec3(0, 0, 0)))),
+ clearness(clearness) {
+}
+ReflectiveMaterial::ReflectiveMaterial(const util::Vec3& color, float clearness)
+ : albedo_texture(std::make_shared<Constant>(Constant(color))),
+ emission_texture(
+ std::make_shared<Constant>(Constant(util::Vec3(0, 0, 0)))),
+ clearness(clearness) {
+}
+util::Vec3 ReflectiveMaterial::albedo(float texel_x, float texel_y) const {
+ return albedo_texture->color(texel_x, texel_y);
+}
+util::Vec3 ReflectiveMaterial::emission(float texel_x, float texel_y) const {
+ return emission_texture->color(texel_x, texel_y);
+}
+util::Vec3 ReflectiveMaterial::scattered_d(const util::Vec3& d,
+ const util::Vec3& n) const {
+ util::Vec3 rand = util::rand_vec3_in_circle(clearness);
+ util::Vec3 reflected = reflection(d, n);
+ return reflected + rand;
+}
+bool ReflectiveMaterial::scatter(const util::Vec3& d,
+ const util::Vec3& n) const {
+ return util::dot(d, n) > 0;
+}
+float ReflectiveMaterial::calculateLightMultiplier(const util::Vec3& d_in,
+ const util::Vec3& d_out,
+ const util::Vec3& n) const {
+ util::Vec3 reflected = reflection(-d_out, n).normalize();
+ /*if (std::pow(util::dot(reflected, -d_in), 1) < 0.7) {
+ std::cout << reflected << " " << -d_in << " "
+ << util::dot(reflected, -d_in) << std::endl;
+ assert(false);
+ }*/
+ auto dot = util::dot(reflected, -d_in);
+ auto theta = std::acos(dot);
+
+ return std::cos(std::min<float>(theta * 3, M_PI / 2));
+}
+} // namespace material
\ No newline at end of file
diff --git a/RayTracer/material/ReflectiveMaterial.h b/RayTracer/material/ReflectiveMaterial.h
new file mode 100644
index 0000000..8c005e5
--- /dev/null
+++ b/RayTracer/material/ReflectiveMaterial.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include "Material.h"
+
+namespace material {
+class ReflectiveMaterial : public Material {
+ public:
+ ReflectiveMaterial(const std::shared_ptr<util::Sampler>& albedo_texture,
+ const std::shared_ptr<util::Sampler>& emission_texture,
+ float clearness);
+ ReflectiveMaterial(const std::shared_ptr<util::Sampler>& albedo,
+ float clearness);
+ ReflectiveMaterial(const util::Vec3& color, float clearness);
+
+ util::Vec3 albedo(float texel_x, float texel_y) const override;
+ util::Vec3 emission(float texel_x, float texel_y) const override;
+ util::Vec3 scattered_d(const util::Vec3& d,
+ const util::Vec3& n) const override;
+ bool scatter(const util::Vec3& d, const util::Vec3& n) const override;
+
+ float calculateLightMultiplier(const util::Vec3& d_in,
+ const util::Vec3& d_out,
+ const util::Vec3& n) const override;
+
+ private:
+ std::shared_ptr<util::Sampler> albedo_texture;
+ std::shared_ptr<util::Sampler> emission_texture;
+ float clearness;
+};
+} // namespace material
--
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