dotNet C# GammaMgr

[Siger]

Probably that I do that not correctly? I can't control/assign value to GammaMgr.DisplayGamma
Via MaxScript - no problem, but it is desirable to use whenever possible less MaxscriptSDK.ExecuteMaxscriptCommand...

Part of code:

if (...)
                {
                    global.GammaMgr.Enable = (sender as ToggleButton).IsChecked.Value;
                    if ((sender as ToggleButton).IsChecked == true)
                    {
                        IInterface13 Core = global.COREInterface13;
                        IRenderer vrender = Core.GetCurrentRenderer(false);
                        IIParamBlock2 pb2 = vrender.GetParamBlock(11);

                        float gval = Convert.ToSingle(this.numCMgamma.Value);

                        global.GammaMgr.FileInGamma = global.GammaMgr.DisplayGamma = gval; //Zero attention from 3ds Max - DisplayGamma
                        global.GammaMgr.FileOutGamma = 1.0f;

                        pb2.SetValue(265, Core.Time, gval, 0); //colorMapping_gamma

                        if (Core.RenderDialogOpen) { Core.UpdateRenderDialogParameters(); }
                    }
                }

global.GammaMgr.FileInGamma; global.GammaMgr.FileOutGamma; works Ok

[Siger]

Additional question...
A half of night I tried to find in what case a problem. Piece of code (not finished):

public static void SetPBValSelNodeColor(IGlobal global, IInterface13 Core, short pid, System.Drawing.Color val, string classname, int pb2Id)
        {
            IINode snode = Core.GetSelNode(0);
            if (snode != null && NodeClassNameIs(Core, snode, classname))
            {
                IObject objectRef = snode.ObjectRef;
                IObject baseObj = objectRef.FindBaseObject();
                IIParamBlock2 pb2 = baseObj.GetParamBlock(pb2Id);
                IColor col = global.Color.Create((byte)~val.R+1, (byte)~val.G+1, (byte)~val.B+1); // Problem
                pb2.SetValue(pid, Core.Time, col, 0);
            }
        }

When I try:

IColor col = global.Color.Create((byte)val.R, (byte)val.G, (byte)val.B);

to pass parameter Color to ParamBlock2 of VRayPhysicalCamera White Balance - ParamBlock2 WB param receives negative/inverted color.

[dgsantana]

Did you try to use floats for creating the IColor or IAColor? Something like.

IColor col = global.Color.Create((float)val.R/255.0f, (float)val.G/255.0f, (float)val.B/255.0f);

Best regards,
Daniel

[Siger]

Did you try to use floats for creating the IColor or IAColor? Something like.

IColor col = global.Color.Create((float)val.R/255.0f, (float)val.G/255.0f, (float)val.B/255.0f);

Best regards,
Daniel

Many Thanks, Daniel! Your solution work properly!
At the same I share the reverse conversion (IColor to System.Drawing.Color):

public static System.Drawing.Color GetPBValSelNodeColor(IInterface13 Core, short pid, string classname, int pb2Id) // Get Color Value from BP2(Id)
        {
            IINode snode = Core.GetSelNode(0);
            System.Drawing.Color cval = System.Drawing.Color.White;
            if (snode != null && NodeClassNameIs(Core, snode, classname))
            {
                IObject objectRef = snode.ObjectRef;
                IObject baseObj = objectRef.FindBaseObject();
                IIParamBlock2 pb2 = baseObj.GetParamBlock(pb2Id);
                IColor icval = pb2.GetColor(pid, Core.Time, 0);

                double c1Rne = Math.Max(0.0f, Math.Min(1.0f, icval.R)); // Force that icval.R really is 0 <= icval.R <= 1 to avoid incorrect behaviour due to rounding errors
                int c1R = (int)Math.Floor(c1Rne == 1.0f ? 255 : c1Rne * 256.0f);

                double c1Gne = Math.Max(0.0f, Math.Min(1.0f, icval.G)); // Force that icval.G really is 0 <= icval.G <= 1 to avoid incorrect behaviour due to rounding errors
                int c1G = (int)Math.Floor(c1Gne == 1.0f ? 255 : c1Gne * 256.0f);

                double c1Bne = Math.Max(0.0f, Math.Min(1.0f, icval.B)); // Force that icval.B really is 0 <= icval.B <= 1 to avoid incorrect behaviour due to rounding errors
                int c1B = (int)Math.Floor(c1Bne == 1.0f ? 255 : c1Bne * 256.0f);

                cval = System.Drawing.Color.FromArgb(c1R, c1G, c1B);
            }
            return cval;
        }