[Indigo]<Solidviews>SolidModeler>SVUtility.mesa!12

SVUtility.mesa

Last edited by Bier on February 5, 1987

Contents: Some helpful Solidviews routines that don't fit anywhere in particular.

DIRECTORY

Feedback, Imager, Rope, SVSceneTypes, ViewerClasses;

SVUtility: CEDAR DEFINITIONS =

BEGIN

FeatureData: TYPE = SVSceneTypes.FeatureData;

MasterObject: TYPE = SVSceneTypes.MasterObject;

MasterObjectList: TYPE = SVSceneTypes.MasterObjectList;

Slice: TYPE = SVSceneTypes.Slice;

SliceList: TYPE = SVSceneTypes.SliceList;

SliceDescriptor: TYPE = SVSceneTypes.SliceDescriptor;

Viewer: TYPE = ViewerClasses.Viewer;

Operations on REAL

For algorithms that need a variable initialized to an impossibly large number. Unfortunately, Real.PlusInfinity can't be compared with anything. These sizes were chosen so that they can be scaled by 1000 and squared once without causing overflow. (Many geometric algorithms work with distance squared to keep from doing square roots)

plusInfinity: REAL = 1E16;

minusInfinity: REAL = -1E16;

Gargoyle guarantees accuracy to within 0.001 inches, or 0.072 screen dots. Allowing two orders of magnitude leeway gives 10-5 inches or 7.2 * 10-4 screen dots.

epsilonInPoints: REAL = 7.2E-4;

epsilonInInches: REAL = 1.0E-5;

Algebraic Math

QuadraticFormula: PROC [a, b, c: REAL] RETURNS [roots: ARRAY [1..2] OF REAL, rootCount: NAT];

Operations on LIST OF MasterObject

AppendToMasterObjects: PROC [mo: MasterObject, list: MasterObjectList] RETURNS [MasterObjectList];

AppendToAssemblyList: PROC [assembly: Slice, list: SliceList] RETURNS [SliceList];

Operations on LIST OF Slice

StartSliceList: PROC [] RETURNS [entityList, ptr: LIST OF Slice];

AddSlice: PROC [slice: Slice, entityList, ptr: LIST OF Slice] RETURNS [newList, newPtr: LIST OF Slice];

Operations on LIST OF REF ANY (should use List.mesa)

StartList: PROC [] RETURNS [entityList, ptr: LIST OF REF ANY];

AddEntity: PROC [entity: REF ANY, entityList, ptr: LIST OF REF ANY] RETURNS [newList, newPtr: LIST OF REF ANY];

Operations on LIST OF SliceDescriptor

StartSliceDescriptorList: PROC [] RETURNS [entityList, ptr: LIST OF SliceDescriptor];

AddSliceDescriptor: PROC [entity: SliceDescriptor, entityList, ptr: LIST OF SliceDescriptor] RETURNS [newList, newPtr: LIST OF SliceDescriptor];

AppendSliceDescriptorList: PROC [list1, list2: LIST OF SliceDescriptor] RETURNS [result: LIST OF SliceDescriptor];

DeleteSliceDescriptorFromList: PROC [sliceD: SliceDescriptor, sliceDList: LIST OF SliceDescriptor] RETURNS [smallerList: LIST OF SliceDescriptor];

Operations on LIST OF FeatureData

CopyFeatureList: PROC [features: LIST OF FeatureData] RETURNS [copyList: LIST OF FeatureData];

FeatureDataNconc: PROC [l1, l2: LIST OF FeatureData] RETURNS [bigList: LIST OF FeatureData];

Filename Operations (factor out as GGFiles in GGCore)

GetInterpressFileName: PROC [shortName, workingDir: Rope.ROPE, feedback: Feedback.FeedbackData] RETURNS [fullName: Rope.ROPE ← NIL, success: BOOL ← TRUE];

GetScriptFileName: PROC [scriptName: Rope.ROPE, currentWDir: Rope.ROPE, feedback: Feedback.FeedbackData] RETURNS [fullName: Rope.ROPE ← NIL, success: BOOL ← TRUE];

GetGenericFileName: PROC [shortName, workingDir, defaultExt: Rope.ROPE, illegalExts: LIST OF Rope.ROPE, feedback: Feedback.FeedbackData, emergency: BOOL ← FALSE] RETURNS [fullName: Rope.ROPE ← NIL, success: BOOL ← TRUE, versionSpecified: BOOL ← FALSE];

Colors

GetSpecialColor: PROC RETURNS [color: Imager.Color];

END.