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
Page 53 and 54:
An area light source is defined by
Page 55 and 56:
The sequencenumber is the integer l
Page 57 and 58:
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
Page 65 and 66:
the exterior is the region adjacent
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RiIdentity ( ); SEE ALSO RiTransfor
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RiScale ( RtFloat sx, RtFloat sy, R
Page 71 and 72:
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
Page 103 and 104:
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
Page 113 and 114:
Image Forward Axis Up Axis Right Ax
Page 115 and 116:
ErrorHandler ”ignore” ErrorHand
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
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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
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;
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These functions compute power and i
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The actual change in a variable is
Page 149 and 150:
Return a unit vector in the directi
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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
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} Oi = sum; Ci = Cs * Oi * (Ka + Kd
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path of the ray. The input Ci and O
Page 167 and 168:
A.2.3 Metal surface surface metal(
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distantlight( float intensity = 1;
Page 171 and 172:
A.6 Imager Shaders A.6.1 Background
Page 173 and 174:
variable definitions ; variables va
Page 175 and 176:
triple sixteentuple arrayindex: [ e
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Logical expressions have the value
Page 179 and 180:
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)
Page 187 and 188:
Comments Any occurrence of the ’#
Page 189 and 190:
In the following sections the synta
Page 191 and 192:
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
Page 197 and 198:
Using RIB File structuring conventi
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Attribute Format PixelFilter Shadin
Page 201 and 202:
##Include filename This entry allow
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D.2.1 RIB Entity File example ##Ren
Page 205 and 206:
Motion Blur Programmable Shading Di
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} E.4 Gaussian Filter RtFloat RiGau
Page 209 and 210:
Appendix G RENDERMAN INTERFACE QUIC
Page 211 and 212:
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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