if some one could help me with the shader

[nobleqiao]

This is my code using elvman's HEX EDITOR,however,I can't get the terrain as I have seen from the editor's preview. I have a problem here,
the area that should be rock,there is grass.So is the rock area
here is my code:
in class MyShaderCallBack:public video::IShaderConstantSetCallBack

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coverage=2;
		bool succ1=services->setPixelShaderConstant("coverage",(f32*)(&coverage),1);
		lightmap=3;
		bool succ2=services->setPixelShaderConstant("lightmap",(f32*)(&lightmap),1);
		splat1=0;
		bool succ3=services->setPixelShaderConstant("splat1",(f32*)(&splat1),1);
		splat2=1;
		bool succ4=services->setPixelShaderConstant("splat2",(f32*)(&splat2),1);

All of the fuction above return false
in the main function

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terrain->setMaterialTexture(0, driver->getTexture("media/terrain/splatting_grass.png"));
	terrain->setMaterialTexture(1, driver->getTexture("media/terrain/splatting_rock.png"));
	terrain->setMaterialTexture(2, driver->getTexture("media/test_coverage.bmp"));
	terrain->setMaterialTexture(3, driver->getTexture("media/test_lightmap.bmp"));

the declaration in ps.hlsl

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sampler2D coverage; //coverage
sampler2D lightmap; //lightmap

sampler2D splat1;
sampler2D splat2;

I am a totally beginer,I hope someone could give me a hand.Any help is appreciated.Thx..

[JP]

I've not used shaders in irrlicht myself but in raw opengl you pass the texture itself to the shader for a sampler2d (in ogl a texture is just an index really) but you're passing the layer index of the texture, rather than the texture itself, so i think that could be the problem.

But i don't know how to pass textures to shaders, though if you search the forum you can probably find out as i'm sure i've seen this question asked before.

[nobleqiao]

I've not used shaders in irrlicht myself but in raw opengl you pass the texture itself to the shader for a sampler2d (in ogl a texture is just an index really) but you're passing the layer index of the texture, rather than the texture itself, so i think that could be the problem.

But i don't know how to pass textures to shaders, though if you search the forum you can probably find out as i'm sure i've seen this question asked before.

Thank U,I have searched the forum before I had to post this topic here.I found some similar problem,but they seem not be solved at all.So I still can't sweep my trouble.Although I really need help,I will keep trying.
Hope the genius can give me a hand.

[dlangdev]

since you didn't post the entire code in a zip, my answer will vary from bullseye to wtf-is-that-answer.

the order of how you declare the textures are important, pay attention to it.

[BlindSide]

Elvman's editor uses HLSL. From the way you are passing the shader uniform variables to specify the texture index it seems like you are using OpenGL. What's going on here exactly?

[nobleqiao]

since you didn't post the entire code in a zip, my answer will vary from bullseye to wtf-is-that-answer.

the order of how you declare the textures are important, pay attention to it.

This is the terrain editor by elvman I am using:
http://irrlicht.sourceforge.net/phpBB2/ ... hlight=hex
I tried to upload a zip file,but failed.
will you gave me your e-mail?I shall sent the zip file to you.

[nobleqiao]

Elvman's editor uses HLSL. From the way you are passing the shader uniform variables to specify the texture index it seems like you are using OpenGL. What's going on here exactly?

Thank you for your attention.I just began to use shader.Since that ,I really don't know how to manage with it.
I am using HLSL,while I am not sure whether should I pass variables like sampler2D coverage to Terrain_ps.hlsl.For when I didn't pass variables,I also can get a terrain scene.but still with the incorrect textures.


MayBe I got it now,this strange situation was probably caused by the coverage map generated by the HEX EDITOR,I reverse the color of each pixel of the map,then I got the right terrain scene now.(but using the original coverage map as height map to do LOD).
Or,at least my HEX EDITOR by Elvman is not the latest.