The RenderMan Interface - Paul Bourke

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Create a depth image file named picturename into a shadow map whose name is texturename. The storage format of the shadow map texture file and the precision of stored texture channels are implementation-dependent. RIB BINDING MakeShadow picturename texturename ...parameterlist... EXAMPLE MakeShadow ”shadow.pic” ”shadow.tex” SEE ALSO shadow() in the Shading Language 7.2 Errors RenderMan Interface procedures do not return error status codes. Instead, the user may specify an error handling routine that will be called whenever an error is encountered. RiErrorHandler ( RtErrorHandler handler ) This procedure sets the error handling procedure invoked by the renderer when an error is detected. Error handling procedures have the following form: RtVoid handler ( RtInt code, RtInt severity, char *message ) code indicates the type of error, and severity indicates how serious the error is. Values for code and severity are defined in ”ri.h”. The message is a character string containing an error message formatted by the renderer which can be printed or displayed, as the handler desires. The following standard error handlers are defined: RtVoid RiErrorIgnore; RtVoid RiErrorPrint; RtVoid RiErrorAbort; RtInt RiLastError; If RiErrorIgnore is specified, all errors are ignored and no diagnostic messages are generated. If RiErrorPrint is specified, a diagnostic message is generated for each error. The rendering system will attempt to ignore the erroneous information and continue rendering. If RiErrorAbort is specified, the first error will cause a diagnostic message to be generated and the rendering system will immediately terminate. Each of the standard error handlers saves the last error code in the global variable RiLastError. This procedure can be called outside an RiBegin-RiEnd block. RIB BINDING 103
ErrorHandler ”ignore” ErrorHandler ”print” ErrorHandler ”abort” If ”ignore”, ”print”, or ”abort” is specified, the equivalent predefined error handling procedure will be invoked in the RIB server. Notice that the RIB parser process may detect RIB stream syntax errors which make it impossible to correctly parse a request. In this case, the error procedure will be invoked and the parser will do its best to resynchronize the input stream by scanning for the next recognizable token. EXAMPLE ErrorHandler ”ignore” 7.3 Archive Files One important use of the RIB protocol is to store a scene description in an archive file for rendering at a later time or in a remote location from the modeling application. Appendix D, RenderMan Interface Bytestream Conventions, outlines a structuring conventions to make these archives as portable and useful as possible. RiArchiveRecord ( RtToken type, char *format [, arg ...] ) This call writes a user data record (data which is outside the scope of the requests described in the rest of Part I of this document) into a RIB archive file or stream. type is one of ”comment”, or ”structure”, or ”verbatim”. ”comment” begins the user data record with a RIB comment marker and terminates it with a newline. ”structure” begins the user data record with a RIB structuring convention preface and terminates it with a newline. ”verbatim” just outputs the data as-is, with no leading comment character and no trailing newline. The user data record itself is supplied as a printf() format string with optional arguments. It is an error to embed newline characters in the format or any of its string arguments. RiReadArchive ( RtToken name, RtVoid (*callback)(RtToken,char*,...), ...parameterlist...) This function will read the named file. Each RIB command in the archive will be parsed and executed exactly as if it had been called by the application program directly, or been in-line in the calling RIB file, as the case may be. This is essentially a RIB-file include mechanism. In the C API version, the callback parameter is a function which will be called for any RIB user data record or structure comment which is found in the file. This routine 104
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The RenderMan Interface Version 3.2
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TABLE OF CONTENTS List of Figures L
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12.1 Surface Shaders . . . . . . .
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Section I DIFFERENCES BETWEEN VERSI
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LIST OF TABLES 4.1 Camera Options .
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PREFACE This document is version 3.
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Section 1 INTRODUCTION The RenderMa
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created using this language. This l
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Depth of Field The ability to simul
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typedef RtPointer typedef RtPointer
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RiContext (ctx1); ... There is no R
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Section 3 RELATIONSHIP TO THE RENDE
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through the interface. Any place wh
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RtContextHandle RiGetContext ( void
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RiWorldBegin (); ... RiColor (...);
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Camera Option Type Default Descript
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ottom top left right Screen Window
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EXAMPLE RiFrameAspectRatio (4.0/3.0
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not support the special projection
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This procedure sets the times at wh
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Output depth values are the camera-
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A particular renderer implementatio
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Renderers may additionally produce
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The number of color components, n,
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RiAttributeBegin () RiAttributeEnd
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RIB BINDING Color c0 c1... cn Color
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An area light source is defined by
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The sequencenumber is the integer l
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4.2.5 Displacement shading The grap
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SEE ALSO RiExterior RiAtmosphere Ri
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Matte onoff EXAMPLE RiMatte (RI TRU
Page 63 and 64: object foo2 will be drawn when the
Page 65 and 66: the exterior is the region adjacent
Page 67 and 68: RiIdentity ( ); SEE ALSO RiTransfor
Page 69 and 70: RiScale ( RtFloat sx, RtFloat sy, R
Page 71 and 72: 4.3.2 Transformation stack Transfor
Page 73 and 74: Section 5 GEOMETRIC PRIMITIVES The
Page 75 and 76: Information Name Type Class Floats
Page 77 and 78: No checking is done by the RenderMa
Page 79 and 80: 5.2 Patches Patches can be either u
Page 81 and 82: U V 0 1 2 3 12 13 14 15 4 5 6 7 8 9
Page 83 and 84: 10 x 7 Aperiodic Bezier Bicubic Pat
Page 85 and 86: SEE ALSO 2 2 [ 0 0 1 1 ] 0 1 ”Pw
Page 87 and 88: parameterlist is a list of token-ar
Page 89 and 90: Requests a sphere defined by the fo
Page 91 and 92: Hyperboloid 0 0 0 .5 0 0 270 ”Cs
Page 93 and 94: z N z V point2 height U x x y 0 max
Page 95 and 96: particle. If a primitive variable i
Page 97 and 98: The code array is a sequence of mac
Page 99 and 100: is an array of floats that define t
Page 101 and 102: The helper program generates geomet
Page 103 and 104: Procedural ”DynamicLoad” [ ”m
Page 105 and 106: SolidBegin ( ”difference” ); So
Page 107 and 108: Section 6 MOTION Some rendering pro
Page 109 and 110: Transformations Geometry Shading Ri
Page 111 and 112: channels (usually an RGB color) can
Page 113: Image Forward Axis Up Axis Right Ax
Page 117 and 118: Part II The RenderMan Shading Langu
Page 119 and 120: spaces (such as CMYK or pseudocolor
Page 121 and 122: transmit reflect transmit P E light
Page 123 and 124: Section 10 RELATIONSHIP TO THE REND
Page 125 and 126: Section 11 TYPES The Shading Langua
Page 127 and 128: Coordinate System ”shader” ”c
Page 129 and 130: As in C, individual array elements
Page 131 and 132: Light Source E Vantage Point N L Il
Page 133 and 134: Surface Element to Illuminate L N I
Page 135 and 136: Name Type Storage Class Description
Page 137 and 138: • conditional execution, • loop
Page 139 and 140: This example integrates over a hemi
Page 141 and 142: Shader instance variable values can
Page 143 and 144: } return 2 * (vector noise(p)) - 1;
Page 145 and 146: These functions compute power and i
Page 147 and 148: The actual change in a variable is
Page 149 and 150: Return a unit vector in the directi
Page 151 and 152: Return surface normal given a point
Page 153 and 154: diffuse returns the diffuse compone
Page 155 and 156: prevent aliasing. If one set of tex
Page 157 and 158: 15.7.3 Shadow depth maps Shadow dep
Page 159 and 160: These functions access the value of
Page 161 and 162: The standard data names supported b
Page 163 and 164: } Oi = sum; Ci = Cs * Oi * (Ka + Kd
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path of the ray. The input Ci and O
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A.2.3 Metal surface surface metal(
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distantlight( float intensity = 1;
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A.6 Imager Shaders A.6.1 Background
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variable definitions ; variables va
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triple sixteentuple arrayindex: [ e
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Logical expressions have the value
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typedef RtPointer RtContextHandle;
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RiOptionV(RtToken name, RtInt n, Rt
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RtInt n, RtToken tokens[], RtPointe
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#define RIE_NOTATTRIBS ((RtInt)26)
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Comments Any occurrence of the ’#
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In the following sections the synta
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C.2.2 Error handling There are two
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adhandle badparamlist badripcode ba
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v e r s i o n 212 # version 003 007
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Using RIB File structuring conventi
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Attribute Format PixelFilter Shadin
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##Include filename This entry allow
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D.2.1 RIB Entity File example ##Ren
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Motion Blur Programmable Shading Di
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} E.4 Gaussian Filter RtFloat RiGau
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Appendix G RENDERMAN INTERFACE QUIC
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Function RiOpacity (color) RiOption
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Geometric Primitives (continued) Fu
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Function abs(x) Math Functions Desc
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Function area(P) calculatenormal(P)
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Texture Mapping Functions Function
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RiInterior 47 RiLightSource 42 RiMa
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and uniform variables on an RiNuPat
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Statement About Pixar’s Copyright
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