Copyright (C) 1994, Digital Equipment Corp.
Created on Tue Jan 19 14:00:00 PST 1994 by najork
MODULE ObPolygonGO;
IMPORT ObAux, ObCommand, ObLib, ObPoint3, ObShape, ObSurfaceGO, ObPointProp,
ObProtoLoader, ObValue, Obliq, Point3, PointProp, PolygonGO,
PolygonGOProxy, ProxiedObj, SynLocation;
CONST
pkgname = "PolygonGO";
***************************************************************************
Wrapper for PolygonGO.T
***************************************************************************
TYPE
T = ObSurfaceGO.T BRANDED "ObPolygonGO.T" OBJECT END;
PROCEDURE AddTObj (pgon : PolygonGO.T) =
<* FATAL ObValue.Error, ObValue.Exception *>
BEGIN
WITH obj = Obliq.ObjectClone (Obliq.Vals {TProto}),
raw = NEW (T, what := "<a PolygonGO.T>", po := pgon) DO
Obliq.ObjectUpdate (obj, "raw", raw);
pgon.proxy := NEW (ProxiedObj.Proxy, obj := obj);
END;
END AddTObj;
***************************************************************************
Setup procedures
***************************************************************************
PROCEDURE SetupPackage () =
PROCEDURE NewOpCode (name: TEXT; arity: INTEGER; code: Code) : OpCode =
BEGIN
RETURN NEW (OpCode, name := name, arity := arity, code := code);
END NewOpCode;
TYPE
OpCodes = ARRAY OF ObLib.OpCode;
VAR
opCodes: REF OpCodes;
BEGIN
opCodes := NEW (REF OpCodes, NUMBER (Code));
opCodes^ :=
OpCodes {
NewOpCode ("New", 1, Code.New),
NewOpCode ("NewWithShapeHint", 2, Code.NewWithShapeHint)
};
ObLib.Register (NEW (Package, name := pkgname, opCodes := opCodes));
ObLib.RegisterHelp (pkgname, Help);
(* DONT KNOW YET WHETHER TO INHIBIT TRANSMISSIONS ... *)
END SetupPackage;
VAR
TProto : ObValue.Val;
PROCEDURE SetupModule (loader : ObProtoLoader.T) =
BEGIN
(*** Retrieve the prototype ***)
loader.load ("PolygonGO.obl");
TProto := loader.get ("PolygonGO_TProto");
(*** Register the proxy maker ***)
PolygonGOProxy.MkProxyT := AddTObj;
END SetupModule;
***************************************************************************
Execution machinery
***************************************************************************
TYPE
Code = {New, NewWithShapeHint};
OpCode = ObLib.OpCode OBJECT
code: Code;
END;
Package = ObLib.T OBJECT
OVERRIDES
Eval := DoEval;
END;
PROCEDURE IsPointArray (val : Obliq.Val) : BOOLEAN RAISES {ObValue.Error} =
BEGIN
FOR i := 0 TO Obliq.ArraySize (val) - 1 DO
IF NOT ISTYPE (Obliq.ArrayGet (val, i), ObPoint3.T) THEN
RETURN FALSE;
END;
END;
RETURN TRUE;
END IsPointArray;
PROCEDURE GetPointArray (val : Obliq.Val) : REF ARRAY OF Point3.T
RAISES {ObValue.Error} =
BEGIN
WITH size = Obliq.ArraySize (val),
pts = NEW (REF ARRAY OF Point3.T, size) DO
FOR i := 0 TO size - 1 DO
pts[i] := ObPoint3.ObliqToM3 (Obliq.ArrayGet (val, i));
END;
RETURN pts;
END;
END GetPointArray;
PROCEDURE GetPointPropValArray (val : Obliq.Val) : REF ARRAY OF PointProp.Val
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
WITH size = Obliq.ArraySize (val),
pts = NEW (REF ARRAY OF PointProp.Val, size) DO
FOR i := 0 TO size - 1 DO
pts[i] := ObPointProp.ObliqToM3 (Obliq.ArrayGet (val, i));
END;
RETURN pts;
END;
END GetPointPropValArray;
PROCEDURE DoEval (self : Package;
opCode : ObLib.OpCode;
<* UNUSED *> arity : ObLib.OpArity;
READONLY args: ObValue.ArgArray;
<* UNUSED *> temp : BOOLEAN;
loc : SynLocation.T) : ObValue.Val
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
CASE NARROW (opCode, OpCode).code OF
| Code.New =>
IF IsPointArray (args[1]) THEN
WITH pts = GetPointArray (args[1]),
go = PolygonGO.NewStatic (pts^) DO
RETURN go.proxy.obj;
END;
ELSE
WITH pts = GetPointPropValArray (args[1]),
go = PolygonGO.New (pts^) DO
RETURN go.proxy.obj;
END;
END;
| Code.NewWithShapeHint =>
IF IsPointArray (args[1]) THEN
WITH pts = GetPointArray (args[1]),
shp = ObShape.GetArg (args, 2, self, opCode, loc),
go = PolygonGO.NewStatic (pts^, shp) DO
RETURN go.proxy.obj;
END;
ELSE
WITH pts = GetPointPropValArray (args[1]),
shp = ObShape.GetArg (args, 2, self, opCode, loc),
go = PolygonGO.New (pts^, shp) DO
RETURN go.proxy.obj;
END;
END;
END;
END DoEval;
***************************************************************************
Help
***************************************************************************
PROCEDURE Help (self : ObCommand.T; arg : TEXT; <* UNUSED *> data : REFANY) =
BEGIN
ObAux.Help (self, arg, pkgname);
END Help;
BEGIN
END ObPolygonGO.