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set rec to makeHitRecord() | raytracer.applescript |
set nearInfinity to 2.0e20 | raytracer.applescript |
set nearZero to 0.001 | raytracer.applescript |
if depth <= 0 | raytracer.applescript |
return v3origin() | raytracer.applescript |
set didHit to world's hit(r, nearZero, nearInfinity, rec) | raytracer.applescript |
if didHit | raytracer.applescript |
set rand to randomInHemisphere(normal of rec) | raytracer.applescript |
set target to v3add(p of rec, rand) | raytracer.applescript |
set dir to v3sub(target, p of rec) | raytracer.applescript |
set material to material of rec | raytracer.applescript |
if material = null | raytracer.applescript |
log "no material on" | raytracer.applescript |
log rec | raytracer.applescript |
set scatterResult to material's scatter(r, rec) | raytracer.applescript |
if (success of scatterResult) | raytracer.applescript |
return v3mul(attenuation of scatterResult, rayColor(scattered of scatterResult, world, depth-1)) | raytracer.applescript |
return v3(0,0,0) | raytracer.applescript |
set t to 0.5*(y of v3unit(direction of r) + 1.0) | raytracer.applescript |
return v3add(v3mulScalar(v3(1.0, 1.0, 1.0),(1.0-t)), v3mulScalar(v3(0.5, 0.7, 1.0),t)) | raytracer.applescript |
on simpleScene() | raytracer.applescript |
set materialGround to newLambertian(v3(0.5, 0.5, 0.5)) | raytracer.applescript |
set materialBlue to newLambertian(v3(0.1, 0.2, 0.5)) | raytracer.applescript |
set materialMetal to newMetal(v3(0.8, 0.6, 0.2), 1) | raytracer.applescript |
set materialGlass to newDielectric(1.5) | raytracer.applescript |
set world to newHittableList({}) | raytracer.applescript |
world's add(newSphere(v3( 0.0, -100.5, -1.0), 100.0, materialGround)) -- ground | raytracer.applescript |
world's add(newSphere(v3( 0.0, 0.0, -1.0), 0.5, materialBlue)) -- center | raytracer.applescript |
world's add(newSphere(v3(-1.0, 0.0, -1.0), 0.5, materialGlass)) -- left | raytracer.applescript |
world's add(newSphere(v3( 1.0, 0.0, -1.0), 0.5, materialMetal)) -- right | raytracer.applescript |
return world | raytracer.applescript |
on randomScene() | raytracer.applescript |
set groundMaterial to newLambertian(v3(0.5, 0.5, 0.5)) | raytracer.applescript |
world's add(newSphere(v3(0,-1000,0), 1000, groundMaterial)) | raytracer.applescript |
set minPos to -3 | raytracer.applescript |
set maxPos to 3 | raytracer.applescript |
set numItems to 5 | raytracer.applescript |
set stepSize to round ((maxPos - minPos) / sqrt(numItems)) rounding up | raytracer.applescript |
repeat with a from minPos to maxPos by stepSize | raytracer.applescript |
repeat with b from minPos to maxPos by stepSize | raytracer.applescript |
set chooseMat to (random number) | raytracer.applescript |
set sphereCenter to v3(a + 0.9*(random number), 0.2, b + 0.9*(random number)) | raytracer.applescript |
if (v3length(v3sub(sphereCenter, v3(4, 0.2, 0))) > 0.9) | raytracer.applescript |
if (chooseMat < 0.8) | raytracer.applescript |
set albedo to v3mul(v3randomInRange(0,1), v3randomInRange(0,1)) | raytracer.applescript |
set sphereMaterial to newLambertian(albedo) | raytracer.applescript |
world's add(newSphere(sphereCenter, 0.2, sphereMaterial)) | raytracer.applescript |
else if (chooseMat < 0.95) | raytracer.applescript |
set albedo to v3randomInRange(0.5, 1) | raytracer.applescript |
set fuzz to randomInRange(0, 0.5) | raytracer.applescript |
set sphereMaterial to newMetal(albedo, fuzz) | raytracer.applescript |
set sphereMaterial to newDielectric(1.5) | raytracer.applescript |
set material1 to newDielectric(1.5) | raytracer.applescript |
world's add(newSphere(v3(0, 1, 0), 1.0, material1)) | raytracer.applescript |
set material2 to newLambertian(v3(0.4, 0.2, 0.1)) | raytracer.applescript |
world's add(newSphere(v3(-4, 1, 0), 1.0, material2)) | raytracer.applescript |
set material3 to newMetal(v3(0.7, 0.6, 0.5), 0.0) | raytracer.applescript |
world's add(newSphere(v3(4, 1, 0), 1.0, material3)) | raytracer.applescript |
on writeRaytracedImage(filename, numWorkers, worker, imageWidth, samplesPerPixel, maxBounces) | raytracer.applescript |
set aspectRatio to 16.0 / 9.0 | raytracer.applescript |
set imageHeight to round (imageWidth / aspectRatio) rounding down | raytracer.applescript |
set world to randomScene() | raytracer.applescript |
set cam to newCamera(v3(13,2,3), v3(0,0,0), v3(0,1,0), 20, aspectRatio) | raytracer.applescript |
log "begin raytracing with " & (count (world's objects)) & " objects" | raytracer.applescript |
set raytracingStartTime to current date | raytracer.applescript |
set chunkSize to round (imageHeight / numWorkers) rounding up | raytracer.applescript |
set chunkStart to chunkSize * worker | raytracer.applescript |
set nextChunkStart to min((chunkSize * (worker + 1)), imageHeight) | raytracer.applescript |
set actualChunkSize to nextChunkStart - chunkStart | raytracer.applescript |
set imgrow to nextChunkStart - 1 -- j | raytracer.applescript |
set rowCount to 0 | raytracer.applescript |
repeat until imgrow < chunkStart | raytracer.applescript |
set scanlineStartTime to current date | raytracer.applescript |
set imgcol to 0 -- i | raytracer.applescript |
set pixelColor to v3origin() | raytracer.applescript |
repeat with sample from 0 to samplesPerPixel | raytracer.applescript |
set u to (imgcol + random number) / (imageWidth-1) | raytracer.applescript |
set v to (imgrow + random number) / (imageHeight-1) | raytracer.applescript |
set r to cam's getRay(u, v) | raytracer.applescript |
v3addMut(pixelColor, rayColor(r, world, maxBounces)) | raytracer.applescript |
imagedata's append(correctColor(v3ToColor(v3divScalar(pixelColor, samplesPerPixel)))) | raytracer.applescript |
log "rendered scanline " & imgrow & " in " & (current date) - scanlineStartTime & "s ("& (round ((rowCount/actualChunkSize)*100))&"%)" | raytracer.applescript |
set rowCount to rowCount + 1 | raytracer.applescript |
log "raytracing took " & (current date) - raytracingStartTime & "s" | raytracer.applescript |
writePPMHeader(outfile,actualChunkSize,imageWidth) | raytracer.applescript |
end writeRaytracedImage | raytracer.applescript |
on getWorkerPartFilename(base, worker) | raytracer.applescript |
base&"part_"&worker&".ppm" | raytracer.applescript |
local worker | raytracer.applescript |
local numWorkers | raytracer.applescript |
local outputFile | raytracer.applescript |
set imageWidth to my renderConfig's imageWidth | raytracer.applescript |
set samplesPerPixel to my renderConfig's samplesPerPixel | raytracer.applescript |
set maxBounces to my renderConfig's maxBounces | raytracer.applescript |
if argv is {} | raytracer.applescript |
set numWorkers to 1 | raytracer.applescript |
set worker to 0 | raytracer.applescript |
set outputFile to "output_"&(time of (current date))&".ppm" | raytracer.applescript |
set numWorkers to my numSMPWorkers | raytracer.applescript |
if (item 1 of argv) as text is "smp" | raytracer.applescript |
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