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|
import net.iximeow.raytrace._
import Objects._
import scala.util.Try
import java.time._
object cgi_main extends App {
val params = System.getenv("QUERY_STRING")
val parsedObjects = params.split("&").map(parse _)
println("HTTP/1.1 200 OK\nContent-type: text/html\n\n")
println("<html><head><style>.mono { font-family: monospace; }</style></head><body>")
val content = if (!parsedObjects.exists(_.isInstanceOf[Succ])) {
usage()
} else {
render(parsedObjects)
}
println(content)
println("</body></html>")
def render(objects: Seq[ParseResult]) = {
val imgPath = renderImage(objects)
s"""<img src="/projects/raycast/${imgPath}"></img>"""
}
def renderImage(objects: Seq[ParseResult]): String = {
val sceneElems = objects.foldLeft(Seq.empty[Surface]) {
case (elems: Seq[Surface], o: ParseResult) => o match {
case Succ(Right(xs)) => elems ++ xs
case _ => elems
}
}
val rays = objects.foldLeft(Seq.empty[Ray]) {
case (rays: Seq[Ray], o: ParseResult) => o match {
case Succ(Left(xs)) => rays ++ xs
case _ => rays
}
}
val res = objects.foldLeft(Option[Res](null)) {
case (r: Option[Res], o: ParseResult) => o match {
case x: Res => Some(x)
case _ => r
}
}.getOrElse(Res(800, 600))
val version = objects.foldLeft(Option[Version](null)) {
case (v: Option[Version], o: ParseResult) => o match {
case x: Version => Some(x)
case _ => v
}
}
val fuccs = objects.foldLeft(Seq.empty[String]) {
case (fuc: Seq[String], o: ParseResult) => o match {
case Fucc(err) => fuc :+ err
case _ => fuc
}
}
val scene = Scene(sceneElems)
println("<p>Rendering a scene with " + sceneElems.size + " surfaces and " + rays.size + " rays</p>")
scene.render(scale = 20, color = 0xc0c0c0, normals = true)
rays
.flatMap(x => scene.cast(x, 63))
.foreach(_.renderTo(scene.buffer, 20, res.resX / 2, res.resY / 2))
/*
val destFile = DateTimeFormatter.ofPattern("YYYYMMdd-HHmmss")
.format(LocalDateTime.now())
*/
// because shitty vps doesn't have java 8 atm
val destFile = System.currentTimeMillis + ".bmp"
scene.save(destFile)
destFile
}
sealed trait ParseResult { }
case class Succ(surface: Either[Seq[Ray], Seq[Surface]]) extends ParseResult
case class Fucc(error: String) extends ParseResult
case class Version(version: String) extends ParseResult
case class Res(resX: Int, resY: Int) extends ParseResult
def parse(str: String): ParseResult = {
val parts = str.split(":").toList
parts match {
case "Ray" :: rest => parseRay(rest)
case "Light" :: rest => parseLight(rest)
case "Segment" :: rest => parseSegment(rest)
case "ParabolaMirror" :: rest => parseParabolicMirror(rest)
case "SphericalMirror" :: rest => parseSphericalMirror(rest)
case "ParabolicLens" :: rest => parseParabolicLens(rest)
case "res" :: rest => parseRes(rest)
case "version" :: rest => parseVersion(rest)
case x => Fucc("Unkown param: " + x)
}
}
private def parseDoubles(params: Seq[String], count: Int, tpe: String): Either[Fucc, Seq[Double]] = {
if (params.length != count) return Left(Fucc("Invalid parameters for " + tpe + ": " + params.mkString(":")))
val parsed = params.map(x => Try(java.lang.Double.parseDouble(x)))
if (parsed.exists(_.isFailure)) return Left(Fucc(
parsed.zip(params).map { case (res, src) => if (res.isFailure) {
"<span class=red>x</span>" // maybe escape and print the invalid value here one day...
} else {
"_"
}}.mkString(":")
))
val succ = parsed.flatMap(_.toOption)
if (succ.length != count) return Left(Fucc("oops"))
Right(succ)
}
private def parseLight(params: Seq[String]): ParseResult = {
parseDoubles(params, 6, "light") match {
case Left(fucc) => fucc
case Right(parsed) =>
Succ(Left(Scene.rays(parsed(4).toInt, parsed(5), Point(parsed(1), parsed(2)), Point(4 * Math.cos(parsed(0)), 4 * Math.sin(parsed(0))))))
}
}
private def parseRay(params: Seq[String]): ParseResult = {
parseDoubles(params, 4, "ray") match {
case Left(fucc) => fucc
case Right(parsed) =>
Succ(Left(Seq(Ray(parsed(0), parsed(1), Point(parsed(2), parsed(3))))))
}
}
private def parseSegment(params: Seq[String]): ParseResult = {
parseDoubles(params, 4, "segment") match {
case Left(fucc) => fucc
case Right(parsed) =>
Succ(Right(Seq(Segment(parsed(0), parsed(1), Point(parsed(2), parsed(3))))))
}
}
private def parseParabolicMirror(params: Seq[String]) =
parseDoubles(params, 7, "parabolic mirror") match {
case Left(fucc) => fucc
case Right(parsed) =>
Succ(Right(Scene.generateParabola(parsed(0), parsed(1), parsed(2), 0, parsed(3).toInt, Point(parsed(4), parsed(5)), parsed(6))))
}
private def parseSphericalMirror(params: Seq[String]) =
parseDoubles(params, 7, "spherical mirror") match {
case Left(fucc) => fucc
case Right(parsed) =>
Succ(Right(Scene.generateMirror(parsed(0), parsed(1).toInt, parsed(2), Point(parsed(3), parsed(4)), parsed(5))))
}
private def parseParabolicLens(params: Seq[String]) =
parseDoubles(params, 5, "parabolic lens") match {
case Left(fucc) => fucc
case Right(parsed) =>
Succ(Right(Seq(ParabolicLens(Point(parsed(0), parsed(1)), parsed(2), parsed(3), parsed(4)))))
}
private def parseRes(params: Seq[String]) =
parseDoubles(params, 2, "res") match {
case Left(fucc) => fucc
case Right(parsed) =>
Res(parsed(0).toInt, parsed(1).toInt)
}
private def parseVersion(params: Seq[String]) =
parseDoubles(params, 1, "version") match {
case Left(fucc) => fucc
case Right(parsed) =>
Version(parsed(0).toString)
}
def usage() = {
"""|<h2>USAGE:</h2>
|<p style="font-family:monospace">object:params&object2:params&object3:params&....</p>
|<p>Version may be specified by beginning with <span class=mono>version:str</span>. By default, assumes the latest version of each object. Some object's parameters may change from version to version.</p>
|<p>Additionally, you may specify desired resolutions by providing <span class=mono>res:x:y</span> where <span class=mono>x</span> and <span class=mono>y</span> are integers.</p>
|<p>(by default, resolution is 800x600)</p>
|</br>
|<h3>OBJECTS:</h3>
|<ul>
| <li><pre class=mono>Ray:dx:dy:xi:yi </pre><p>Ray to trace.</p></li>
| <li><pre class=mono>Light:rotation:atx:aty:number:spacing </pre><p>Bulk batch of light from some place.</p></li>
| <li><pre class=mono>Segment:dx:dy:xi:yi </pre><p>Reflective surface. Careful of normals.</p></li>
| <li><pre class=mono>ParabolaMirror:a:b:w_i:segments:atx:aty:rotated </pre><p>Parabola with coefficients like x(t) = a * t, y(t) = b * t^2, centered at <span class=mono>(atx, aty)</span>, rotated <span class=mono>rotated</span> radians with <span class=mono>segments</span> segments of approximation.</p></li>
| <li><pre class=mono>SphericalMirror:r:segments:arcSize:atx:aty:rotated </pre><p>doc: TODO</p></li>
| <li><pre class=mono>ParabolicLens:atx:aty:rotation:radius:focal </pre><p>doc: TODO. ALSO, BUGGY.</p></li>
|</ul>""".stripMargin
}
}
|
