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property material: _material | raytracer.applescript |
return sphere | raytracer.applescript |
script hittableListPrototype | raytracer.applescript |
on clear() | raytracer.applescript |
set my objects to {} | raytracer.applescript |
on add(object) | raytracer.applescript |
set end of my objects to object | raytracer.applescript |
on hit(r, tMin, tMax, rec) | raytracer.applescript |
set tempRec to makeHitRecord() | raytracer.applescript |
set hitAnything to false | raytracer.applescript |
set closestSoFar to tMax | raytracer.applescript |
repeat with object in my objects | raytracer.applescript |
if object's hit(r, tMin, closestSoFar, tempRec) | raytracer.applescript |
set hitAnything to true | raytracer.applescript |
set closestSoFar to t of tempRec | raytracer.applescript |
hitRecordCopyFrom(rec, tempRec) | raytracer.applescript |
return hitAnything | raytracer.applescript |
on newHittableList(_objects) | raytracer.applescript |
script hittableList | raytracer.applescript |
property parent: hittableListPrototype | raytracer.applescript |
property objects: _objects | raytracer.applescript |
return hittableList | raytracer.applescript |
on reflect(v, n) | raytracer.applescript |
return v3sub(v, v3mulScalar(n, 2*v3dot(v, n))) | raytracer.applescript |
on refract(uv, n, etaiOverEtat) | raytracer.applescript |
set cosTheta to min(v3dot(v3mulScalar(uv, -1), n), 1.0) | raytracer.applescript |
set rOutPerp to v3mulScalar(v3add(uv, v3mulScalar(n, cosTheta)), etaiOverEtat) | raytracer.applescript |
set rOutParallel to v3mulScalar(n, -1*sqrt(abs(1.0 - v3lengthSq(rOutPerp)))) | raytracer.applescript |
return v3add(rOutPerp, rOutParallel) | raytracer.applescript |
on reflectance(cosine, refIdx) | raytracer.applescript |
set r0 to (1-refIdx) / (1+refIdx) | raytracer.applescript |
set r0 to r0*r0 | raytracer.applescript |
return r0 + (1-r0) * ((1 - cosine)^5) | raytracer.applescript |
on newLambertian(_albedo) | raytracer.applescript |
script lambertian | raytracer.applescript |
property albedo: _albedo | raytracer.applescript |
on scatter(rIn, rec) | raytracer.applescript |
set scatterDirection to v3add(normal of rec, randomUnitVector()) | raytracer.applescript |
if v3nearZero(scatterDirection) | raytracer.applescript |
set scatterDirection to normal of rec | raytracer.applescript |
{ ¬
scattered: makeRay(p of rec, scatterDirection), ¬
attenuation: v3clone(my albedo), ¬
success: true ¬
} | raytracer.applescript |
return lambertian | raytracer.applescript |
on newMetal(_albedo, _fuzz) | raytracer.applescript |
script metal | raytracer.applescript |
property fuzz: clamp(_fuzz, 0, 1) | raytracer.applescript |
set reflected to reflect(v3unit(direction of rIn), normal of rec) | raytracer.applescript |
local fuzzDirection | raytracer.applescript |
if my fuzz > 1 | raytracer.applescript |
set fuzzDirection to v3mulScalar(randomInUnitSphere(), my fuzz) | raytracer.applescript |
set fuzzDirection to v3origin() | raytracer.applescript |
set scattered to makeRay(p of rec, v3add(reflected, fuzzDirection)) | raytracer.applescript |
set success to v3dot(direction of scattered, normal of rec) > 0 | raytracer.applescript |
{ ¬
scattered: scattered, ¬
attenuation: v3clone(my albedo), ¬
success: success ¬
} | raytracer.applescript |
return metal | raytracer.applescript |
on newDielectric(_indexOfRefraction) | raytracer.applescript |
script dielectric | raytracer.applescript |
property indexOfRefraction: _indexOfRefraction | raytracer.applescript |
if frontFace of rec | raytracer.applescript |
set refractionRatio to (1.0/(my indexOfRefraction)) | raytracer.applescript |
set refractionRatio to my indexOfRefraction | raytracer.applescript |
set unitDirection to v3unit(direction of rIn) | raytracer.applescript |
set cosTheta to min(v3dot(v3mulScalar(unitDirection, -1), normal of rec), 1.0) | raytracer.applescript |
set sinTheta to sqrt(1.0 - cosTheta*cosTheta) | raytracer.applescript |
set cannotRefract to refractionRatio * sinTheta > 1.0 | raytracer.applescript |
local direction | raytracer.applescript |
if cannotRefract or reflectance(cosTheta, refractionRatio) > random number | raytracer.applescript |
set direction to reflect(unitDirection, normal of rec) | raytracer.applescript |
set direction to refract(unitDirection, normal of rec, refractionRatio) | raytracer.applescript |
set scattered to makeRay(p of rec, direction) | raytracer.applescript |
{ ¬
scattered: scattered, ¬
attenuation: v3(1.0, 1.0, 1.0), ¬
success: true ¬
} | raytracer.applescript |
return dielectric | raytracer.applescript |
on newCamera(lookfrom, lookat, vup, vfov, aspectRatio) | raytracer.applescript |
set h to tan(vfov/2) -- this tan() function expects degrees | raytracer.applescript |
set _viewportHeight to 2.0 * h | raytracer.applescript |
set _viewportWidth to aspectRatio * _viewportHeight | raytracer.applescript |
set _focalLength to 1.0 | raytracer.applescript |
set w to v3unit(v3sub(lookfrom, lookat)) | raytracer.applescript |
set u to v3unit(v3cross(vup, w)) | raytracer.applescript |
set v to v3cross(w, u) | raytracer.applescript |
set _origin to v3clone(lookfrom) | raytracer.applescript |
set _horizontal to v3mulScalar(u, _viewportWidth) | raytracer.applescript |
set _vertical to v3mulScalar(v, _viewportHeight) | raytracer.applescript |
set _lowerLeftCorner to ¬ | raytracer.applescript |
v3sub( ¬ | raytracer.applescript |
v3sub(_origin, v3divScalar(_horizontal, 2)), ¬ | raytracer.applescript |
v3divScalar(_vertical, 2) ¬ | raytracer.applescript |
), ¬ | raytracer.applescript |
w ¬ | raytracer.applescript |
) | raytracer.applescript |
script camera | raytracer.applescript |
property viewportHeight : _viewportHeight | raytracer.applescript |
property viewportWidth : _viewportWidth | raytracer.applescript |
property focalLength : _focalLength | raytracer.applescript |
property origin : _origin | raytracer.applescript |
property horizontal : _horizontal | raytracer.applescript |
property vertical : _vertical | raytracer.applescript |
property lowerLeftCorner: _lowerLeftCorner | raytracer.applescript |
on getRay(s, t) | raytracer.applescript |
makeRay(my origin, v3sub(v3add(v3add(my lowerLeftCorner, v3mulScalar(my horizontal, s)), v3mulScalar(my vertical, t)), my origin)) | raytracer.applescript |
on rayColor(r, world, depth) | raytracer.applescript |
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