How to use ARGB color mode in mogre?

I'am new for ogre , and I want to control entity's color with ARGB color mode like this:

ent.GetSubEntity(0).GetMaterial().GetBestTechnique(0).GetPass(0).Ambient.SetAsARGB(uint colorvalue);


But It can not do anything ! can anybody help?

(I'm very sorry about my poor English!)

Thank you !

this a ogre Material system topic, try finding in OGRE forums. May be there is some way to use ARGB colors directly using the material script.

Thank you ,Marioko!

And there is any way to convert System.Drawing.Color to fload value for R,G,B?then,I can use SetAmbient() function like this:

ent.GetSubEntity(0).GetMaterial().GetTechnique(0).GetPass(0).SetAmbient (float r,float g,float b);

It would work fine!

(I'm so sorry about my poor English!)

Mmm sure, with System.Drawing.Color you can:

Color slateBlue = Color.FromName("SlateBlue");
byte g = slateBlue.G;
byte b = slateBlue.B;
byte r = slateBlue.R;

Bytes are a numbers from 0 to 255, in Mogre colors are from 0 to 1.0 then:

Bytes Float
Min 0 0
Max 255 1.0

Only you need to do i a little convertion like this:

byte green = slateBlue.G;
float mogreGreen = green/255; // this get a 0 to 1.0 value


Thank you for your help,Marioko!

I fine the other way like this :


ColourValue color = new ColourValue();
color.SetAsARGB((uint)ARGBColorValue)
ent.GetSubEntity(0).GetMaterial().GetTechnique(0).GetPass(0).Ambient=color;


And I have another problem : I want to create two same entities of different color ,how can I do ?use material clone?use material script ?or anyother way?

(I'am sorry about my poor English !)

nice.. i know that should be a better way to convert colors (but i dont remember that)

Entity object has a method SetMaterial and a property Material, you can create a lot of entity of the same .mesh file and for each entity set a custom material..

heres my convertion code
public class MyColor
{
public MyColor()
{
}
public static Color ConvertColourValue(ColourValue colourValue)
{
return Color.FromArgb((int)(colourValue.a * 255), (int)(colourValue.r * 255), (int)(colourValue.g * 255), (int)(colourValue.b * 255));
}
public static ColourValue ConvertColor(Color color)
{
return new ColourValue((color.R / 255), (color.G / 255), (color.B / 255), (color.A / 255));
}
}
then you can call it like
light.SpecularColour = MyColor.ConvertColor(Color.SlateBlue);
Color mySspecularColor = MyColor.ConvertColourValue(light.SpecularColour);


Thank you everybody!

The problem has solved perfectly,thanks again!

I have another problem about ManualObject now.There is any way to set the line width?

nice.. mm you should open a new topic about ManualObject.. and remember find first in OGRE official forums and then MOGRE forums.

Thank you ,Marioko!Thanks for your help in these days !