The RenderMan Interface - Paul Bourke

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placed within a frame block, any nonstandard shaders that appear in that frame must be listed. ##Textures texture1, texture2, ... Lists any preexisting textures required in the file. When placed in the header of a RIB file, any preexisting textures that appear anywhere in the file should be listed. When placed within a frame block, any preexisting shaders that appear in that frame must be listed. ##CapabilitiesNeeded feature1, feature2, ... Indicates any RenderMan Interface optional capabilites required in the file (when located in the header) or required in the frame (when located at the top of a frame block). The optional capabilities are: Area Light Sources Motion Blur Special Camera Projections Bump Mapping Programmable Shading Spectral Colors Deformations Radiosity Texture Mapping Displacements Ray Tracing Trim Curves Environment Mapping Shadow Depth Mapping Volume Shading Level Of Detail Solid Modeling See Part I, Section 1, Introduction, for a description of these capabilities. Frame information Frame-local information must be located directly after a FrameBegin RIB request and be contiguous. These comments should provide frame-local information that contains administrative and resource hints. ##CameraOrientation eyex eyey eyez atx aty atz [ upx upy upz ] Indicates the location and orientation of the camera for the current frame in World Space coordinates. The up vector is optional and the default value is [0 1 0]. ##Shaders shader1, shader2,... Lists the nonstandard shaders required in the current frame. ##Textures texture1, texture2,... Lists the nonstandard textures required in the current frame. ##CapabilitiesNeeded feature1, feature2,... Lists the special capabilities required in the current frame from among those listed under Header Information. Body Information Body information may be located anywhere in the RIB file. 189
##Include filename This entry allows the specification of a file name for inclusion in the RIB stream. Note that the Include keyword itself does not cause the inclusion of the specified file. As with all structural hints, the Include keyword serves only as a special hint for render management systems. As such, the Include keyword should only be used if render management facilities are known to exist. D.1.4 RIB File structuring example ##RenderMan RIB-Structure 1.1 ##Scene Bouncing Ball ##Creator /usr/ucb/vi ##CreationDate 12:30pm 8/24/89 ##For RenderMan Jones ##Frames 2 ##Shaders PIXARmarble, PIXARwood, MyUserShader ##CapabilitiesNeeded ShadingLanguage Displacements version 3.03 Declare "d" "uniform point" Declare "squish" "uniform float" Option "limits" "bucketsize" [6 6] #renderer specific Option "limits" "gridsize" [18] #renderer specific Format 1024 768 1 #mandatory resolution Projection "perspective" Clipping 10 1000.0 FrameBegin 1 ##Shaders MyUserShader, PIXARmarble, PIXARwood ##CameraOrientation 10.0 10.0 10.0 0.0 0.0 0.0 Transform [.707107 -.408248 -.57735 0 0 .816497 -.57735 0 -.707107 -.408248 -.57735 0 0 0 17.3205 1 ] WorldBegin AttributeBegin Attribute "identifier" "name" "myball" Displacement "MyUserShader" "squish" 5 AttributeBegin Attribute "identifier" "shadinggroup" ["tophalf"] Surface "PIXARmarble" Sphere .5 0 .5 360 AttributeEnd AttributeBegin Attribute "identifier" "shadinggroup" ["bothalf"] Surface "plastic" Sphere .5 -.5 0. 360 AttributeEnd AttributeEnd AttributeBegin Attribute "identifier" "name" ["floor"] Surface "PIXARwood" "roughness" [.3] "d" [1] # geometry for floor Polygon "P" [-100. 0. -100. -100. 0. 100. 100. 0. 100. 10.0 0. -100.] AttributeEnd WorldEnd FrameEnd 190
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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
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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
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
Page 165 and 166: path of the ray. The input Ci and O
Page 167 and 168: A.2.3 Metal surface surface metal(
Page 169 and 170: 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
Page 177 and 178: Logical expressions have the value
Page 179 and 180: typedef RtPointer RtContextHandle;
Page 181 and 182: RiOptionV(RtToken name, RtInt n, Rt
Page 183 and 184: RtInt n, RtToken tokens[], RtPointe
Page 185 and 186: #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
Page 195 and 196: v e r s i o n 212 # version 003 007
Page 197 and 198: Using RIB File structuring conventi
Page 199: Attribute Format PixelFilter Shadin
Page 203 and 204: D.2.1 RIB Entity File example ##Ren
Page 205 and 206: Motion Blur Programmable Shading Di
Page 207 and 208: } 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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