The RenderMan Interface - Paul Bourke

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Copyright c○2000 Pixar. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of Pixar. The information in this publication is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by Pixar. Pixar assumes no responsibility or liability for any errors or inaccuracies that may appear in this publication. RenderMan R○ is a registered trademark of Pixar. i
TABLE OF CONTENTS List of Figures List of Tables Preface vii viii x Part I The RenderMan Interface 1 Section 1 INTRODUCTION 2 1.1 Features and Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1.1 Required features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1.2 Advanced Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Structure of this Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Section 2 LANGUAGE BINDING SUMMARY 7 2.1 C Binding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Bytestream Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Section 3 RELATIONSHIP TO THE RENDERMAN SHADING LANGUAGE 12 Section 4 GRAPHICS STATE 15 4.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.1.1 Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.1.2 Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.1.3 Additional options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.1.4 Implementation-specific options . . . . . . . . . . . . . . . . . . . . . 36 4.2 Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 4.2.1 Color and opacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 4.2.2 Texture coordinates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 4.2.3 Light sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 4.2.4 Surface shading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 4.2.5 Displacement shading . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 4.2.6 Volume shading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 4.2.7 Shading rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 4.2.8 Shading interpolation . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 4.2.9 Matte objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 4.2.10 Bound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 ii
Page 1: The RenderMan Interface Version 3.2
Page 5 and 6: 12.1 Surface Shaders . . . . . . .
Page 7 and 8: Section I DIFFERENCES BETWEEN VERSI
Page 9 and 10: LIST OF TABLES 4.1 Camera Options .
Page 11 and 12: PREFACE This document is version 3.
Page 13 and 14: Section 1 INTRODUCTION The RenderMa
Page 15 and 16: created using this language. This l
Page 17 and 18: Depth of Field The ability to simul
Page 19 and 20: typedef RtPointer typedef RtPointer
Page 21 and 22: RiContext (ctx1); ... There is no R
Page 23 and 24: Section 3 RELATIONSHIP TO THE RENDE
Page 25 and 26: through the interface. Any place wh
Page 27 and 28: RtContextHandle RiGetContext ( void
Page 29 and 30: RiWorldBegin (); ... RiColor (...);
Page 31 and 32: Camera Option Type Default Descript
Page 33 and 34: ottom top left right Screen Window
Page 35 and 36: EXAMPLE RiFrameAspectRatio (4.0/3.0
Page 37 and 38: not support the special projection
Page 39 and 40: This procedure sets the times at wh
Page 41 and 42: Output depth values are the camera-
Page 43 and 44: A particular renderer implementatio
Page 45 and 46: Renderers may additionally produce
Page 47 and 48: The number of color components, n,
Page 49 and 50: RiAttributeBegin () RiAttributeEnd
Page 51 and 52: RIB BINDING Color c0 c1... cn Color
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An area light source is defined by
Page 55 and 56:
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
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object foo2 will be drawn when the
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the exterior is the region adjacent
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RiIdentity ( ); SEE ALSO RiTransfor
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RiScale ( RtFloat sx, RtFloat sy, R
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4.3.2 Transformation stack Transfor
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Section 5 GEOMETRIC PRIMITIVES The
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Information Name Type Class Floats
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No checking is done by the RenderMa
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5.2 Patches Patches can be either u
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U V 0 1 2 3 12 13 14 15 4 5 6 7 8 9
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10 x 7 Aperiodic Bezier Bicubic Pat
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SEE ALSO 2 2 [ 0 0 1 1 ] 0 1 ”Pw
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parameterlist is a list of token-ar
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Requests a sphere defined by the fo
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Hyperboloid 0 0 0 .5 0 0 270 ”Cs
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z N z V point2 height U x x y 0 max
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particle. If a primitive variable i
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The code array is a sequence of mac
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is an array of floats that define t
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The helper program generates geomet
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Procedural ”DynamicLoad” [ ”m
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SolidBegin ( ”difference” ); So
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Section 6 MOTION Some rendering pro
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Transformations Geometry Shading Ri
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channels (usually an RGB color) can
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Image Forward Axis Up Axis Right Ax
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ErrorHandler ”ignore” ErrorHand
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Part II The RenderMan Shading Langu
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spaces (such as CMYK or pseudocolor
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transmit reflect transmit P E light
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Section 10 RELATIONSHIP TO THE REND
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Section 11 TYPES The Shading Langua
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Coordinate System ”shader” ”c
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As in C, individual array elements
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Light Source E Vantage Point N L Il
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Surface Element to Illuminate L N I
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Name Type Storage Class Description
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• conditional execution, • loop
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This example integrates over a hemi
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Shader instance variable values can
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} return 2 * (vector noise(p)) - 1;
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These functions compute power and i
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The actual change in a variable is
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Return a unit vector in the directi
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Return surface normal given a point
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diffuse returns the diffuse compone
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prevent aliasing. If one set of tex
Page 157 and 158:
15.7.3 Shadow depth maps Shadow dep
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These functions access the value of
Page 161 and 162:
The standard data names supported b
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} 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
Page 193 and 194:
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
Page 213 and 214:
Geometric Primitives (continued) Fu
Page 215 and 216:
Function abs(x) Math Functions Desc
Page 217 and 218:
Function area(P) calculatenormal(P)
Page 219 and 220:
Texture Mapping Functions Function
Page 221 and 222:
RiInterior 47 RiLightSource 42 RiMa
Page 223 and 224:
and uniform variables on an RiNuPat
Page 225 and 226:
Statement About Pixar’s Copyright
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The RenderMan Interface - Paul Bourke

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