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- Short: 3D solid modeler (PPC binaries)
- Author: Gershon Elber, Kriton Kyrimis, Andreas R. Kleinert (port)
- Uploader: Andreas_Kleinert@t-online.de
- Type: gfx/3d
-
- This archive contains binaries (recompiled with SAS/C for PPC) of version 7.0 of
- the IRIT 3-D solid modeler. The IRIT package can create inputs for various 3-D
- rendering programs, e.g., POVray and rayshade.
-
- Only smakefiles and SCOPTIONS had to be changed, so no need to upload the
- source again. See "readme.powerup" for information on usage and installation.
-
- You *need* to download the other irit70 archives from Aminet:gfx/3d,
- which means: at least irit70bin.lha and irit70src.lha !
-
- *****************************************************************************
-
- General Information:
-
- The IRIT solid modeling system is a simple environment that allows one to
- model basic, primitive based, models using Boolean operations as well
- as freeform surface's based models.
-
- The system is designed for simplicity and is geared toward research.
- As such, no graphical user interface (GUI) exists or is planned in the
- near future. The modeling is performed using the main
- module/executable of the system which is called (surprise!) IRIT. A
- textual interface (or PUI for programmable user interface) is
- available which provides the interaction interface. An interpreter
- processes the user's command and executes them. This interpreter
- includes general mechanisms that are common in high level programming
- languages such as loops, conditional sentences, and functions. In
- addition, features that can be found in modern languages such as
- operator overloading and object oriented design are extensively used.
-
- Version 7.0 of the IRIT solid modeling system contains tools that can
- aid in research and development in the areas of computer aided
- geometric design and computer graphics. Here is a list of the features
- that can be found:
-
- * Full featured points/vectors/homogeneous matrices algebra by overloading
- the basic operators +,-,*,/,^.
-
- * Polygonal based modeling. Constructors for basic primitives (box, cone,
- torus, etc.) are provided as well as low level constructors for direct
- polygonal model's construction. Boolean operations between polygonal
- models is also supported.
-
- * Freeform curve and surface manipulation tools. Supported are
- polynomial and rational Bezier and piecewise polynomial/rational NURB
- curves and surfaces. A large set of tools to manipulate freeform curves
- and surfaces is provided and includes (for both curves and surfaces):
- + Low level Constructors (direct control points control).
- + High Level Constructors (Sweep, Extrude, Boolean Sum, etc.).
- + Merging and Profiling tools.
- + Evaluation.
- + Subdivision.
- + Refinement.
- + Degree Raising.
- + Differentiation and Integration.
- + Symbolic Computation (Difference, Sum, and Product).
- + Polygonal/Polyline approximation.
- + Composition.
- + Offset.
- + Trimmed surfaces.
-
- Tools to compute the zero set of curves, the extreme points,
- the minimal or maximal distance from a curve to a point or a line,
- the inflection points and/or points of extreme curvature, and the
- intersection points of two curves are also available.
-
- The symbolic tools provided allow one to represent scalar and
- vector fields of differential properties of the curves and surfaces
- such as normals and curvature. The curve's inflection and extreme
- curvature detection tools, mentioned above, exploits these symbolic
- tool and are therefore robust.
-
- * Trivariate Bspline and bezier support that includes evaluation, iso surface
- extraction, subdivision, differentiation etc.
-
- In addition to the main module of IRIT, several other tools
- are provided:
-
- + poly3d-h: A hidden line removal tool.
- + illustrt: A line drawing illustration tool.
- + xgldrvs/xglmdrvs/xmtdrvs/x11drvs/wntdrvs/os2drvs/amidrvs: Display
- devices (and viewing programs at the same time) for SGI's gl, gl/Motif,
- X11, X11/Motif, Window NT, OS2 2.x, and AMIGA. All these drivers
- supports the display of animation using animation curves.
- + irit2ps/irit2dxf/irit2iv/irit2nff/irit2plg/irit2ray/irit2scn/irit2xfg:
- Filters to convert data files created by IRIT to PostScript, DXF,
- SGI Inventor, NFF, REND386, Rayshade, SCN, and Xfig format.
- + dat2irit/dxf2irit: Filters to convert from data file of IRIT to IRIT's
- solid modeling scripts and from DXF to IRIT.
-
- The IRIT solid modeller is actively used in various research areas:
-
- + Adaptive Isocurve Algorithm. A coverage based on adaptive extraction
- of isocurves can be used for various purposes from toolpath for
- machining purposes to image rendering. This algorithm, that is
- exploiting symbolic computation, is implemented using the IRIT
- solid modeller and a tool named xgladap make use of the hardware of
- the SGI systems to provide real time rendering using adaptive
- isocurves.
- + Layout. A new fabrication scheme automatically computes an
- approximated layout of a free form surface, on the plane, so it
- can be cut from planar sheets (such as paper or fabric) and
- stitched together to form an approximation of the original
- surface. Tools to automatically compute the layout were implemented
- using IRIT.
- + Morphing. Using refinement and degree raising, two tools that are
- available in this system, different surfaces can be brought to
- a common function space and be continuously morphed or transformed
- from one to the other. Again, a successful implementation exists in
- IRIT.
- + Illustrt. Line drawings is a neglected area of computer graphics.
- Illustrt is a tool developed with the aid of IRIT, and now is part
- of IRIT, to automatically generate line drawings with special effects
- such as width/size and intensity depth cueing, Z sorting, and end of
- edge clipping etc.
-
- The system is written in C and is running on virtually all
- Unix environments, including but not limited to SUN's SPARC, SGI's
- SGI4D, HP3xx/4xx/7xx, DEC 5000, IBM RS6000, E&S ESV, and i386 SVR4,
- using either X11 or, when available, SGI's GL. In addition, other
- environments such as Window NT and OS2 using IBM PC 386 and above or
- 68xxx AMIGA are also supported.
-
-
- ============================= Archive contents =============================
-
- Original Packed Ratio Date Time Name
- -------- ------- ----- --------- -------- -------------
- 12552398 5334280 57.5% 20-Feb-98 23:03:46 +bin.lha
- 2118 1116 47.3% 20-Feb-98 22:56:32 +disclaim
- 6232 2832 54.5% 20-Feb-98 22:57:40 +irit70PPC.readme
- 1469 756 48.5% 20-Feb-98 22:58:16 +readme.powerup
- 291 190 34.7% 20-Feb-98 23:17:50 +scoptions
- 426 251 41.0% 20-Feb-98 23:17:50 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 430 252 41.3% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 983 445 54.7% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 299 202 32.4% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 3679 841 77.1% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 535 311 41.8% 20-Feb-98 23:17:52 +smakefile
- 633 338 46.6% 20-Feb-98 23:17:52 +scoptions
- 1011 432 57.2% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 672 341 49.2% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 773 405 47.6% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 836 410 50.9% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:52 +scoptions
- 514 298 42.0% 20-Feb-98 23:17:52 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:54 +scoptions
- 663 341 48.5% 20-Feb-98 23:17:54 +smakefile
- 332 203 38.8% 20-Feb-98 23:17:54 +scoptions
- 700 357 49.0% 20-Feb-98 23:17:54 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:54 +scoptions
- 657 370 43.6% 20-Feb-98 23:17:54 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:54 +scoptions
- 482 272 43.5% 20-Feb-98 23:17:54 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:54 +scoptions
- 650 336 48.3% 20-Feb-98 23:17:54 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:54 +scoptions
- 510 282 44.7% 20-Feb-98 23:17:54 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:54 +scoptions
- 440 258 41.3% 20-Feb-98 23:17:54 +smakefile
- 311 193 37.9% 20-Feb-98 23:17:54 +scoptions
- 427 261 38.8% 20-Feb-98 23:17:54 +smakefile
- -------- ------- ----- --------- --------
- 12583136 5349468 57.4% 13-Apr-98 12:34:28 42 files
-