NinevehGL

I'm following the tutorial (lesson 10) on Youtube, but the shader does not have any effect on display.
There may be some version difference.
fsh and vsh files are the same as that on youtube.

code:

nglGlobalColorFormat(NGLColorFormatRGBA);
nglGlobalLightEffects(NGLLightEffectsOFF);
nglGlobalFlush();

NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys:
kNGLMeshOriginalYes, kNGLMeshKeyOriginal,
kNGLMeshCentralizeYes, kNGLMeshKeyCentralize,
@"1.0", kNGLMeshKeyNormalize,
nil];

mesh = [[NGLMesh alloc] initWithFile:@"cube.obj" settings:settings delegate:nil];

NGLShaders *shader = [NGLShaders shadersWithFilesVertex:@"s.vsh" andFragment:@"s.fsh"];
mesh.shaders = shader;
[mesh compileCoreMesh];

camera = [[NGLCamera alloc] initWithMeshes:mesh, nil];
[camera setAspectRatio:1.0 / camera.aspectRatio];

Thanks.

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@dineybomfim

Posts: 571

NGLAdmin

Mon, Jul 16 2012

In response to: @inuyashazaq

Hello,

You don't need to call "[mesh compileCoreMesh];" when the mesh is loading.

Make sure your custom shaders is working, for example:
In "s.fsh" make something like:


void main(void)
{
	gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
}

If the mesh appear "red" so your shader file is working, you can proceed.

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Posts: 12

NGLNewbie

Mon, Jul 16 2012

In response to: @dineybomfim

I deleted compileCoreMesh, and this is the shader files:
fragment:

precision lowp float;
precision lowp int;
varying vec4 v_color;
void main()
{
gl_FragColor = v_color;
}

vertex:

precision lowp float;
precision lowp int;
varying vec4 v_color;
void main()
{
v_color = a_nglPosition;
}

As the youtube example shows, but it is still not working.
Is there any example using shader files so that I can find where my problem is?

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Posts: 12

NGLNewbie

Mon, Jul 16 2012

In response to: @dineybomfim

I also tried
void main(void)
{
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
}
in fragment (replace the full fragment file with the code as well as just change the line gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);), but both method did not work.

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Posts: 12

NGLNewbie

Mon, Jul 16 2012

In response to: @dineybomfim

Could it be my iPhone's problem? It's 4s under 5.0.1.

By the way , when running under iPhone Simulator, mesh cannot be loaded, and the banner shows Polys:0 Verts:0, the simulator is loaded with at least ios 5.0.

I tried this with the latest release (downloaded within this week), and with the template program (the cube) without any modifications.

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@dineybomfim

Posts: 571

NGLAdmin

Mon, Jul 16 2012

In response to: @inuyashazaq

well buddy,

If the debug shows 0 vertx, so your mesh is not being loaded properly. Take a look at the console output.

If you still having troubles, please enter in contact via the Contact area for code investigation.

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Posts: 12

NGLNewbie

Tue, Jul 17 2012

In response to: @dineybomfim

Thanks for your reply.

After several reboots of my macbook, the problem seems solved. It might be linking problems of Xcode.
Then the debug windows of xcode shows the following:

Error while processing NGLSLSource.
Shader file "s.vsh" was not found in the specified path.
The path to a file must reflect its real location, if only the file's name was specified, the search will happen in the Global Path.
For more information check the nglGlobalFilePath() function.

Could you tell me where / which folder should I place my shader files?

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Posts: 12

NGLNewbie

Tue, Jul 17 2012

In response to: @inuyashazaq

Oh..again it should be a linking problem....
simulator and my 4s gives me different response..

Sorry for annoying you...

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@dineybomfim

Posts: 571

NGLAdmin

Tue, Jul 17 2012