how to change select entity texture's color

how to change select entity texture's color !
have ideas?
thanks

var tus = entityMaterial.GetTechnique(0).GetPass(0).CreateTextureUnitState();
tus.SetColourOperationEx(LayerBlendOperationEx.LBX_MODULATE, LayerBlendSource.LBS_MANUAL, LayerBlendSource.LBS_CURRENT, colour);
This will tint the texture using the 'colour' ColourValue.

Note:
It'll effect all enities that use this material.
To avoid that, create a clone of the material, do the above with the clone and change the materialname of the entity to the name of the clone.

good thanks! this blend color and texture picture

You can also use a simple fragment shader, which will work better than the above when the texture isn't greyscale.

colorize.cg:
float4 main(float2 vIn : TEXCOORD0,
uniform sampler2D tex0 : TEXUNIT0,
uniform float4 newColor
) : COLOR
{
float4 weightsBW = float4(0.3, 0.59, 0.11, 0);
float4 color = tex2D(tex0, vIn);
float brightness = dot(color, weightsBW);
float4 cOut = brightness * newColor;
cOut.a = color.a;
return cOut;
}

colorize.material:
fragment_program colorize cg
{
source colorize.cg
entry_point main
profiles ps_2_0 arbfp1
}

Usage (assumes the texture is in technique 0 pass 0):
Pass p = entityMaterial.GetTechnique(0).GetPass(0);
p.SetFragmentProgram("colorize");
p.GetFragmentProgramParameters().SetNamedConstant("newColor", colour);

I think a shader is code which will be processed by the GPU.
What's the advantage of a fragment shader for the case of changing a material colour?


In a ported code for creating a material with a custom colour. There I also can define a transparency (by the last SetDiffuse() parameter).
It's different to the other code. I published it on the wiki page MOGRE Line 3D. Here is a copy:

// create material (colour)
MaterialPtr moMaterial = MaterialManager.Singleton.Create("line_material", "debugger");
moMaterial.ReceiveShadows = false;
moMaterial.GetTechnique(0).SetLightingEnabled(true);
moMaterial.GetTechnique(0).GetPass(0).SetDiffuse(0, 0, 1, 0);
moMaterial.GetTechnique(0).GetPass(0).SetAmbient(0, 0, 1);
moMaterial.GetTechnique(0).GetPass(0).SetSelfIllumination(0, 0, 1);
moMaterial.Dispose(); // dispose pointer, not the material