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First pass at doing reflections -- splotchy...

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This commit is contained in:
Eryn Wells 2013-09-21 16:45:30 -07:00
parent 58f3cdd304
commit 482896cfa1
1 changed files with 23 additions and 4 deletions
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27
src/scene.cc
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@ -213,15 +213,16 @@ Scene::trace_ray(const Ray &ray,
return out_color; return out_color;
} }
/*
* Diffuse lighting. (Shading, etc.)
*/
Material shape_material = intersected_shape->get_material(); Material shape_material = intersected_shape->get_material();
Color shape_color = shape_material.get_diffuse_color(); Color shape_color = shape_material.get_diffuse_color();
Vector3 intersection = ray.parameterize(nearest_t); Vector3 intersection = ray.parameterize(nearest_t);
Vector3 normal = intersected_shape->compute_normal(intersection); Vector3 normal = intersected_shape->compute_normal(intersection);
/*
* Diffuse lighting. (Shading, etc.)
*/
Vector3 light_direction; Vector3 light_direction;
float ldotn, diffuse_level, ambient_level; float ldotn, diffuse_level, ambient_level;
Ray shadow_ray; Ray shadow_ray;
@ -259,5 +260,23 @@ Scene::trace_ray(const Ray &ray,
* Specular lighting. (Reflections, etc.) * Specular lighting. (Reflections, etc.)
*/ */
float specular_level = shape_material.get_specular_level();
/*
* Compute the reflection ray. Computing the direction of the reflection ray is done by the following formula:
*
* d = dr - 2n(dr . n)
*
* where d is the direction, dr is the direction of the incoming ray, and n is the normal vector. Period (.)
* indicates the dot product.
*
* The origin of the reflection ray is the point on the surface where the incoming ray intersected with it.
*/
Ray reflection_ray = Ray(intersection, ray.direction - 2.0 * normal * ray.direction.dot(normal));
Color specular_color = trace_ray(reflection_ray, depth + 1, weight * specular_level);
// TODO: Mix in specular_color of material.
out_color += specular_level * specular_color;
return out_color; return out_color;
} }