Copyright (C) 1994, Digital Equipment Corp.
Digital Internal Use Only
Created on Sat Mar 5 20:17:15 PST 1994 by najork
MODULE ObCameraGO;
IMPORT CameraGO, ObAux, ObCommand, ObGO, ObLib, ObPointProp, ObProp,
ObProtoLoader, ObRealProp, ObValue, Obliq, SynLocation;
CONST
pkgname = "CameraGO";
***************************************************************************
Wrapper for CameraGO.T
***************************************************************************
REVEAL
T = ObGO.T BRANDED "ObCameraGO.T" OBJECT END;
PROCEDURE GetArg (args : ObValue.ArgArray;
idx : INTEGER;
package : ObLib.T;
opCode : ObLib.OpCode;
loc : SynLocation.T) : CameraGO.T
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
WITH raw = Obliq.ObjectSelect (args[idx], "raw") DO
TYPECASE raw OF
| T (node) =>
RETURN node.po;
ELSE
ObValue.BadArgType (idx, pkgname, package.name, opCode.name, loc);
RETURN NIL; (* ... only to suppress compiler warning *)
END;
END;
END GetArg;
***************************************************************************
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 ("From", -1, Code.From),
NewOpCode ("To", -1, Code.To),
NewOpCode ("Up", -1, Code.Up),
NewOpCode ("Aspect", -1, Code.Aspect),
NewOpCode ("SetFrom", 2, Code.SetFrom),
NewOpCode ("SetTo", 2, Code.SetTo),
NewOpCode ("SetUp", 2, Code.SetUp),
NewOpCode ("SetAspect", 2, Code.SetAspect)
};
ObLib.Register (NEW (Package, name := pkgname, opCodes := opCodes));
ObLib.RegisterHelp (pkgname, Help);
END SetupPackage;
PROCEDURE SetupModule (loader : ObProtoLoader.T) =
BEGIN
loader.load ("CameraGO.obl");
END SetupModule;
***************************************************************************
Execution machinery
***************************************************************************
TYPE
Code = {From, To, Up, Aspect, SetFrom, SetTo, SetUp, SetAspect};
OpCode = ObLib.OpCode OBJECT
code: Code;
END;
Package = ObLib.T OBJECT
OVERRIDES
Eval := DoEval;
END;
PROCEDURE DoEval ( self : Package;
opCode : ObLib.OpCode;
<* UNUSED *> arity : ObLib.OpArity;
READONLY args: ObValue.ArgArray;
<* UNUSED *> tmp : BOOLEAN;
loc : SynLocation.T) : ObValue.Val
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
CASE NARROW (opCode, OpCode).code OF
| Code.From => RETURN ObProp.NameToObliq (CameraGO.From);
| Code.To => RETURN ObProp.NameToObliq (CameraGO.To);
| Code.Up => RETURN ObProp.NameToObliq (CameraGO.Up);
| Code.Aspect => RETURN ObProp.NameToObliq (CameraGO.Aspect);
| Code.SetFrom =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
p = ObPointProp.GetOverloadedVal(args, 2, self, opCode, loc) DO
go.setProp (CameraGO.From.bind (p));
RETURN ObValue.valOk;
END;
| Code.SetTo =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
p = ObPointProp.GetOverloadedVal(args, 2, self, opCode, loc) DO
go.setProp (CameraGO.To.bind (p));
RETURN ObValue.valOk;
END;
| Code.SetUp =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
p = ObPointProp.GetOverloadedVal(args, 2, self, opCode, loc) DO
go.setProp (CameraGO.Up.bind (p));
RETURN ObValue.valOk;
END;
| Code.SetAspect =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
r = ObRealProp.GetOverloadedVal(args, 2, self, opCode, loc) DO
go.setProp (CameraGO.Aspect.bind (r));
RETURN ObValue.valOk;
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 ObCameraGO.