VC++光线追踪算法源码实现

Rayshade Quick Reference ------------------------------------------------------------------------------- Key: [thing] Optional item <Thing> Production Thing Number or String (thing) Default value(s) thing Keyword ------------------------------------------------------------------------------- Reals and integers may be written in exponential notation, with or without a decimal point. Reals are truncated to integers when need be. Numbers may also be written as expressions surrounded by a matched pair of parentheses. Subexpressions may be parenthesized to control order of evaluation. Variables may be defined and used in parenthesized expressions. Predefined variables include time (current time) and frame (current frame number, 0 - frames-1), pi, dtor (pi/180), rotd (180/pi). Available operators are '+' (addition), '-' (subtraction and negation), '*' (multiplication), '/' (division), '%' (remainder), '^' (exponentiation). Functions include sin, cos, tan, asin, acos, atan, sqrt, hypot. Strings are written as non-quoted strings that may include include the special characters '/' ("slash"), '-' ("dash"), '_' ("underscore), and '.' ("period"), in addition to upper and lowercase letters and non-leading digits. ------------------------------------------------------------------------------- Command-line options (override options set in input file): -A frame First frame to render -a Toggle alpha channel -C cutoff Adaptive tree cutoff -c Continued rendering -D depth Maximum ray tree depth. -E eye_sep Eye separation -e Exponential RLE output -F freq Report frequency -f Flip triangle normals -G gamma Gamma exponent -g Use gaussian filter -h Help -j Toggle jittered sampling -l Render left eye view -m Produce sample map -N frames Total frames to render -n No shadows -O outfile Output file name -o Toggle opaque shadows -P cpp-args Arguments for cpp -p Preview-quality -q Run quietly -R xres yres Resolution -r Right eye view -S samples Use Samples^2 samples -s Toggle shadow caching -T r g b Contrast threshold -u Toggle use of cpp -V filename Verbose file output -v Verbose output -W lx hx ly hy Render subwindow -X l r b t Crop window ------------------------------------------------------------------------------- File: /* Input file consists of...*/ <Item> [<Item> ... ] Item: <Viewing> <Light> <Atmosphere> <RenderOption> <ObjItem> <Definition> ObjItem: /* Items used in object definition blocks */ <SurfDef> <ApplySurf> <Instance> <ObjDef> Viewing: eyep Xpos Ypos Zpos /* Eye position (0 -10 0) */ lookp Xpos Ypos Zpos /* Look position (0 0 0) */ up Xup Yup Zup /* "up" vector (0 0 1) */ fov Hfov [Vfov] /* Field of view in degrees (horiontal=45) */ aperture Width /* Aperture width (0) */ focaldist Distance /* focal distance (|eyep - lookp|) */ shutter Speed /* Shutter speed (0 --> no blur) */ framelength Length /* Length of a singelf frame (1) */ screen Xsize Ysize /* Screen size */ window Xmin Xmax Ymin Ymax /* Window (0 xsize-1 0 ysize-1) */ crop left right bot top /* Crop window (0 1 0 1) */ eyesep Separation /* eye separation (0) */ SurfDef: /* Give a name to a set of surface attributes. */ surface Name <SurfSpec> [<SurfSpec> ...] Surface: /* Surface specification */ <SurfSpec> /* Use gven attributes */ Surfname [<SurfSpec> ...] /* Use named surface w/ optional mods. */ cursurf [<SurfSpec> ...] /* Use cur. surface w/mods - see ApplySurf */ SurfSpec: /* Surface attribute specification */ ambient R G B /* Ambient contribution */ diffuse R G B /* Diffuse color */ specular R G B /* Specular color */ specpow Exponent /* Phong exponent */ body R G B /* Body color */ extinct Coef /* Extinction coefficient */ transp Ktr /* Transparency */ reflect Kr /* Reflectivity */ index N /* Index of refraction */ translu Ktl R G B Stpow /* Translucency, transmit diffuse, spec exp */ noshadow /* No shadows cast on this surface */ Effect: /* Atmospheric Effects */ mist R G B Rtrans Gtrans Btrans Zero Scale fog R G B Rtrans Gtrans Btrans Atmosphere: /* Global atmosphere */ atmosphere [Index] <Effect> [<Effect>...] /* Global index, effects */ ApplySurf: applysurf <Surface> /* apply surf to all following objs w/o surface */ Instance: /* Instance of an object */ <Object> [<Transforms>] [<Textures>] Object: Primitive /* Primitive object */ Aggregate /* Named aggregate */ ObjDef: /* define a named object */ name Objname <Instance> Primitive: /* Primitive object */ plane [<Surface>] Xpos Ypos Zpos Xnorm Ynorm Znorm disc [<Surface>] Radius Xpos Ypos Zpos Xnorm Ynorm Znorm sphere [<Surface>] Radius Xpos Ypos Zpos triangle [<Surface>] Xv1 Yv1 Zv1 Xv2 Yv2 Zv2 Xv3 Yv3 Zv3/* flat-shaded triangle */ triangle [<Surface>] Xv1 Yv1 Zv1 Xn1 Yn1 Zn1 Xv2 Yv2 Zv2 Xn2 Yn2 Zn2 Xv3 Yv3 Zv3 Xn3 Yn3 Zn3/* Phong-shaded triangle */ polygon [<Surface>] Xv1 Yv1 Zv1 Xv2 Yv2 Zv2 Xv3 Yv3 Zv3 [Xv3 Yv4 Zv4 ...] box [<Surface>] Xlow Ylow Zlow Xhi Yhi Zhi cylinder [<Surface>] Radius Xbase Ybase Zbase Xapex Yapex Zapex cone [<Surface>] Rbase Xbase Ybase Zbase Rapex Xapex Yapex Zapex torus [<Surface>] Rswept Rtube Xpos Ypos Zpos Xnorm Ynorm Znorm blob [<Surface>] Thresh Stren Rad Xpos Ypos Zpos [Stren Rad X Y Z ...] heightfield [<Surface>] Filename Aggregate: Grid List Csg Grid: grid X Y Z <ObjItem> [<ObjItem> ...] end List: list <ObjItem> [<ObjItem> ...] end Csg: union <Object> <Object> [<Object> ...] end intersect <Object> <Object> [<Object> ...] end difference <Object> <Object> [<Object> ...] end /* CSG will only work properly when applied to closed objects, e.g.: * sphere, box, torus, blob, closed Aggregate, other Csg object */ Transforms: /* Transformations */ translate Xtrans Ytrans Ztrans scale Xscale Yscale Zscale rotate Xaxis Yaxis Zaxis Degrees transform A B C D E F G H I [Xt Yt Zt] Textures: texture <TextType> [Transforms] [<Texture> [Transforms] ...] Texture: checker <Surface> blotch Scale <Surface> bump Bumpscale marble [Colormapname] fbm Offset Scale H Lambda Octaves Thresh [Colormapname] fbmbump Offset Scale H Lambda Octaves wood gloss Glossiness cloud Offset Scale H Lambda Octaves Cthresh Lthresh Transcale sky Scale H Lambda Octaves Cthresh Lthresh stripe <Surface> Width Bumpscale image Imagefile [<ImageTextOption> [<ImageTextOption> ...]] ImageTextOption: component <SufComp> range Lo Hi smooth textsurf <Surface>