obliqlib3D/src/ObRootGO.m3


Copyright (C) 1994, Digital Equipment Corp.
Digital Internal Use Only
                                                                           
       Created on Sat Mar  5 20:42:30 PST 1994 by najork                   

MODULE ObRootGO;

IMPORT ObAux, ObBooleanProp, ObCameraGO, ObColorProp, ObCommand, ObGO,
       ObGraphicsBase, ObGroupGO, ObLib, ObProp, ObProtoLoader, ObRealProp,
       ObValue, Obliq, ProxiedObj, RootGO, RootGOProxy, SynLocation;

CONST
  pkgname = "RootGO";
*************************************************************************** Wrapper for RootGO.T ***************************************************************************

TYPE
  T = ObGroupGO.T BRANDED "ObRootGO.T" OBJECT END;

PROCEDURE AddTObj (root : RootGO.T) =
  <* FATAL ObValue.Error, ObValue.Exception *>
  BEGIN
    WITH obj = Obliq.ObjectClone (Obliq.Vals {TProto}),
         raw = NEW (T, what := "<a RootGO.T>", po := root) DO
      Obliq.ObjectUpdate (obj, "raw", raw);
      root.proxy := NEW (ProxiedObj.Proxy, obj := obj);
    END;
  END AddTObj;

PROCEDURE GetArg (args    : ObValue.ArgArray;
                  idx     : INTEGER;
                  package : ObLib.T;
                  opCode  : ObLib.OpCode;
                  loc     : SynLocation.T) : RootGO.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 ("New",                   2, Code.New),
            NewOpCode ("NewStd",                0, Code.NewStd),
            NewOpCode ("NewStdWithBase",        1, Code.NewStdWithBase),
            NewOpCode ("ChangeCamera",          2, Code.ChangeCamera),
            NewOpCode ("Background",           -1, Code.Background),
            NewOpCode ("DepthcueSwitch",       -1, Code.DepthcueSwitch),
            NewOpCode ("DepthcueColor",        -1, Code.DepthcueColor),
            NewOpCode ("DepthcueFrontPlane",   -1, Code.DepthcueFrontPlane),
            NewOpCode ("DepthcueBackPlane",    -1, Code.DepthcueBackPlane),
            NewOpCode ("DepthcueFrontScale",   -1, Code.DepthcueFrontScale),
            NewOpCode ("DepthcueBackScale",    -1, Code.DepthcueBackScale),
            NewOpCode ("SetBackground",         2, Code.SetBackground),
            NewOpCode ("SetDepthcueSwitch",     2, Code.SetDepthcueSwitch),
            NewOpCode ("SetDepthcueColor",      2, Code.SetDepthcueColor),
            NewOpCode ("SetDepthcueFrontPlane", 2, Code.SetDepthcueFrontPlane),
            NewOpCode ("SetDepthcueBackPlane",  2, Code.SetDepthcueBackPlane),
            NewOpCode ("SetDepthcueFrontScale", 2, Code.SetDepthcueFrontScale),
            NewOpCode ("SetDepthcueBackScale",  2, Code.SetDepthcueBackScale)
        };

    ObLib.Register (NEW (Package, name := pkgname, opCodes := opCodes));
    ObLib.RegisterHelp (pkgname, Help);
  END SetupPackage;

VAR
  TProto : ObValue.Val;

PROCEDURE SetupModule (loader : ObProtoLoader.T) =
  BEGIN
    (*** Retrieve the prototype ***)
    loader.load ("RootGO.obl");
    TProto := loader.get ("RootGO_TProto");

    (*** Register the proxy maker ***)
    RootGOProxy.MkProxyT := AddTObj;
  END SetupModule;
*************************************************************************** Execution machinery ***************************************************************************

TYPE
  Code = {ChangeCamera, New, NewStd, NewStdWithBase,
          Background, DepthcueSwitch, DepthcueColor, DepthcueFrontPlane,
          DepthcueBackPlane, DepthcueFrontScale, DepthcueBackScale,
          SetBackground, SetDepthcueSwitch, SetDepthcueColor,
          SetDepthcueFrontPlane, SetDepthcueBackPlane, SetDepthcueFrontScale,
          SetDepthcueBackScale};

  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 *> temp         : BOOLEAN;
                  loc          : SynLocation.T) : ObValue.Val
    RAISES {ObValue.Error, ObValue.Exception} =
  BEGIN
    CASE NARROW (opCode, OpCode).code OF
    | Code.New =>
      WITH cam  = ObCameraGO.GetArg     (args, 1, self, opCode, loc),
           base = ObGraphicsBase.GetArg (args, 2, self, opCode, loc),
           root = RootGO.New (cam, base) DO
        RETURN root.proxy.obj;
      END;
    | Code.NewStd =>
      WITH root = RootGO.NewStd () DO
        RETURN root.proxy.obj;
      END;
    | Code.NewStdWithBase =>
      WITH base = ObGraphicsBase.GetArg (args, 1, self, opCode, loc),
           root = RootGO.NewStd (base) DO
        RETURN root.proxy.obj;
      END;
    | Code.ChangeCamera =>
      WITH root = GetArg            (args, 1, self, opCode, loc),
           cam  = ObCameraGO.GetArg (args, 2, self, opCode, loc) DO
        root.changeCamera (cam);
        RETURN ObValue.valOk;
      END;
    | Code.Background =>
      RETURN ObProp.NameToObliq (RootGO.Background);
    | Code.SetBackground =>
      WITH go = ObGO.GetArg                  (args, 1, self, opCode, loc),
           pv = ObColorProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
        go.setProp (RootGO.Background.bind (pv));
        RETURN ObValue.valOk;
      END;
    | Code.DepthcueSwitch =>
      RETURN ObProp.NameToObliq (RootGO.DepthcueSwitch);
    | Code.SetDepthcueSwitch =>
      WITH go = ObGO.GetArg                   (args, 1, self, opCode, loc),
           pv = ObBooleanProp.GetOverloadedVal(args, 2, self, opCode, loc) DO
        go.setProp (RootGO.DepthcueSwitch.bind (pv));
        RETURN ObValue.valOk;
      END;
    | Code.DepthcueColor =>
      RETURN ObProp.NameToObliq (RootGO.DepthcueColour);
    | Code.SetDepthcueColor =>
      WITH go = ObGO.GetArg                  (args, 1, self, opCode, loc),
           pv = ObColorProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
        go.setProp (RootGO.DepthcueColour.bind (pv));
        RETURN ObValue.valOk;
      END;
    | Code.DepthcueFrontPlane =>
      RETURN ObProp.NameToObliq (RootGO.DepthcueFrontPlane);
    | Code.SetDepthcueFrontPlane =>
      WITH go = ObGO.GetArg                 (args, 1, self, opCode, loc),
           pv = ObRealProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
        go.setProp (RootGO.DepthcueFrontPlane.bind (pv));
        RETURN ObValue.valOk;
      END;
    | Code.DepthcueBackPlane =>
      RETURN ObProp.NameToObliq (RootGO.DepthcueBackPlane);
    | Code.SetDepthcueBackPlane =>
      WITH go = ObGO.GetArg                 (args, 1, self, opCode, loc),
           pv = ObRealProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
        go.setProp (RootGO.DepthcueBackPlane.bind (pv));
        RETURN ObValue.valOk;
      END;
    | Code.DepthcueFrontScale =>
      RETURN ObProp.NameToObliq (RootGO.DepthcueFrontScale);
    | Code.SetDepthcueFrontScale =>
      WITH go = ObGO.GetArg                 (args, 1, self, opCode, loc),
           pv = ObRealProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
        go.setProp (RootGO.DepthcueFrontScale.bind (pv));
        RETURN ObValue.valOk;
      END;
    | Code.DepthcueBackScale =>
      RETURN ObProp.NameToObliq (RootGO.DepthcueBackScale);
    | Code.SetDepthcueBackScale =>
      WITH go = ObGO.GetArg                 (args, 1, self, opCode, loc),
           pv = ObRealProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
        go.setProp (RootGO.DepthcueBackScale.bind (pv));
        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 ObRootGO.