Problem with Vertex Texture Fetch - HLSL
Author
Hi all,
i was trying to use vertex texture lookups for my program. But of course this doesn't work. There is no error but the function
"float4 height = tex2Dlod(dispSamp,float4(UV.xy ,0,0));"
always (but only in vertex shader, in pixel shader it works perfectly) returns the value float4(0,0,0,1).
I'm rendering some stuff into the vertextexture (Usage.RenderTarget, Format.A32B32G32R32F, Pool.Default) and then pass it to the vertex shader.
This question here is very similar but also these answers couldn't help me.
So maybe You can help me.
PS:
The same Shader works perfect in nVidia's FX Composer with a texture from file. Are there maybe some problems with my device-settings?
PSS:
I use the Default Pool. But here
it is said, that the texture must be created in the scratch pool. But it isn't possible for me to create it in scratch pool.
[Edited by - gogogigo on January 20, 2009 12:21:07 PM]
How are you binding the texture to your device? Are you directly calling SetTexture on the device, or are you setting it on the Effect?
Also, you will probably want to run your app with the debug runtimes active, to see if you can get any information from that.
Also, you will probably want to run your app with the debug runtimes active, to see if you can get any information from that.
Author
Thanx for response!
I'm using (VisualBasic).NET.
To create the texture:
HLSL Code for texture:
To set the texture in program:
I don't know yet how to debug the shader in Visual Basic...
I wonder about, that the Shader works in FXComposer and mainly about that "tex2Dlod(dispS..." works in pixelshader in my app.
I have the feeling that there's a problem with my device or sth like that.?
To Create my Device i use this code:
By the way: is it really necessary to use the scratch pool?
[Edited by - gogogigo on January 20, 2009 2:18:44 PM]
I'm using (VisualBasic).NET.
To create the texture:
dispmap = New Texture(device, (-field.rect.X + field.rect.Width + 1) * 50, (-field.rect.Y + field.rect.Height + 1) * 50, _ 0, Microsoft.DirectX.Direct3D.Usage.RenderTarget, Format.A32B32G32R32F, _ Microsoft.DirectX.Direct3D.Pool.Default)// (-field.rect.X + field.rect.Width + 1)*50 is 550HLSL Code for texture:
texture dispTex;sampler dispSamp = sampler_state{ Texture = <dispTex>; MinFilter = Point; MagFilter = Point; MipFilter = Point;};//... and to sample: float4 height = tex2Dlod(dispSamp,float4(UV.xy ,0,0));To set the texture in program:
dispTexHandle = effect.GetParameter(dispTexHandle, "dispTex")effect.SetValue(dispTexHandle , dispmap)I don't know yet how to debug the shader in Visual Basic...
I wonder about, that the Shader works in FXComposer and mainly about that "tex2Dlod(dispS..." works in pixelshader in my app.
I have the feeling that there's a problem with my device or sth like that.?
To Create my Device i use this code:
Dim present As PresentParameters = New PresentParameters present.BackBufferCount = 1 present.BackBufferFormat = Format.A8R8G8B8 present.SwapEffect = SwapEffect.Discard present.AutoDepthStencilFormat = DepthFormat.D24X8 present.EnableAutoDepthStencil = True present.Windowed = False present.BackBufferWidth = 1280 present.BackBufferHeight = 1024 device = New Direct3D.Device(0, DeviceType.Hardware, targetform, CreateFlags.SoftwareVertexProcessing, present) device.RenderState.ZBufferEnable = True device.RenderState.ZBufferWriteEnable = True device.RenderState.SourceBlend = Blend.SourceAlpha device.RenderState.DestinationBlend = Blend.SourceAlpha device.SamplerState(0).MaxAnisotropy = 8 device.SamplerState(0).MinFilter = TextureFilter.Anisotropic device.SamplerState(0).MagFilter = TextureFilter.AnisotropicBy the way: is it really necessary to use the scratch pool?
[Edited by - gogogigo on January 20, 2009 2:18:44 PM]
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