directx user

hi,

iam currently having some issues with my sample texture to wrap proper on my geodesic sphere, actually it seems like the address mode of my sampler doesnt works. I need the texture to repeat on the other side of the sphere, so i assigned a wrap samplerstate:

D3D11_SAMPLER_DESC samplerdesc = D3D11_SAMPLER_DESC();ZeroMemory( &samplerdesc, sizeof(samplerdesc) );samplerdesc.AddressU = D3D11_TEXTURE_ADDRESS_MODE::D3D11_TEXTURE_ADDRESS_WRAP;samplerdesc.AddressV = D3D11_TEXTURE_ADDRESS_MODE::D3D11_TEXTURE_ADDRESS_WRAP;samplerdesc.Filter = D3D11_FILTER::D3D11_FILTER_ANISOTROPIC;device->CreateSamplerState(&samplerdesc,&sampstate);////////////////////////////////immediatecontext->PSSetSamplers(0,1,&sampstate);immediatecontext->VSSetSamplers(0,1,&sampstate);

Shadercode:

Texture2D<float4> Textur : register(t0);sampler sampler1 : register(s0);cbuffer Matrix : register( b0 ){	row_major matrix World;	row_major matrix View;	row_major matrix Projection;};struct VS_INPUT{    float4 Pos : POSITION;    float2 texcoord : TEXCOORD;};struct PS_INPUT{    float4 Pos : SV_POSITION;    float2 texcoord : TEXCOORD;};//--------------------------------------------------------------------------------------// Vertex Shader//--------------------------------------------------------------------------------------PS_INPUT VS( VS_INPUT input ){    PS_INPUT output = (PS_INPUT)0;    output.Pos = mul(input.Pos,World);    output.Pos = mul(output.Pos,View);    output.Pos = mul(output.Pos,Projection);    output.texcoord = input.texcoord;    return output;}//--------------------------------------------------------------------------------------// Pixel Shader//--------------------------------------------------------------------------------------float4 PS( PS_INPUT input) : SV_Target{	float4 ret = Textur.Sample(sampler1,input.texcoord);	return ret;}

Is there a problem with the shader itself?


The resolution of the image is 512X512, so there shouldnt be a problem with it?  merkurfail.PNG   238.36K   20 downloads

the u coordinate ranges from 0 to 2, and the white strip has nothing to do with the texture, will replace it soon

edit:




Its working now, i missed to set the addressmode w parameter in the samplerstate, but i have another question anyway.
While searching in the internet i saw this code snippet:
Texture2D Textur : register(t0);
SamplerState sampler1 : register(s0);


while i used this one:
Texture2D<float4> Textur : register(t0);
sampler sampler1 : register(s0);

both is working but where is the difference, besides the float4 telling hlsl the format.

Hello, its me again.
After i sucessfully initialised my shader code i experienced some performance issues with drawing my scene which contains spherical geometrie. The issue seems to be the seperate drawing calls which tookes about 0,3ms. first i thought my graphics card would be too slow to give me the necessary performance to render 1800 spheres but then i increased the vertex-count of my "sphere" and the rendering tooked the same time.

Now i know that the Issue has to be the cpu-gpu-communication, but everything at all i cant imagine how a single draw call can cost that much time?... if i look at modern games having hundreds of models displayed at the same time.

A solution would be to use instancing but iam not really sure how i can use it at dx11, basicly all that should be done is telling the gpu to loop my indexbuffer content n times insteat of calling the drawing such often. The problem is i have absolutly no idea how to do that? Creating the whole indesbuffer containing 1800 times the same index-sequence seams to be very messy and unnecessary.

And if you use different models at the same time i guess a drawing call which takes 200 ms for 1000 different object buffers isnt really aceptable so how do YOU manage it?

Hello Forum,

I have currently some issues with my shader code:

cbuffer matrizen : register( b0 )
{
	row_major matrix World;
	row_major matrix View;
	row_major matrix Projection;

};


struct VS_INPUT
{
	float4 Pos : POSITION;
};

struct PS_INPUT
{
	float4 Pos : SV_POSITION;
};


//--------------------------------------------------------------------------------------
// Vertex Shader
//--------------------------------------------------------------------------------------
PS_INPUT VS( VS_INPUT input )
{
	PS_INPUT output = (PS_INPUT)0;

	output.Pos = mul(input.Pos,World);
	output.Pos = mul(output.Pos,View);
	output.Pos = mul(output.Pos,Projection);

	return output;
}


//--------------------------------------------------------------------------------------
// Pixel Shader
//--------------------------------------------------------------------------------------
float4 PS( PS_INPUT input) : SV_Target
{
	return float4(1.0f,0.0f,0.0f,1.0f);
}

actually this code is mostly copied from the directx sample browser and should work as it also works in the sample project. The Problem is, it doesnt displays anything if i apply the matrix transformations inside the vertex shader. The Matrices are assigned over this code.

struct Mats
{
	XMMATRIX World;
	XMMATRIX View;
	XMMATRIX Projection;
};
........................
Mats mat;
mat.World = XMMatrixIdentity(); //no geometry transformations
XMVECTOR Eye = XMVectorSet( 0.0f, 0.0f, 5.0f, 0.0f );
XMVECTOR At = XMVectorSet( 0.0f, 0.0f, 0.0f, 0.0f );
XMVECTOR Up = XMVectorSet( 0.0f, 1.0f, 0.0f, 0.0f );
mat.View = XMMatrixLookAtLH( Eye, At, Up ); //looking on the triangle
mat.Projection =  XMMatrixPerspectiveFovLH( XM_PIDIV4, (FLOAT)width / (FLOAT)height, 0.01f, 100.0f ); //calculating perspective matrix


immediatecontext->UpdateSubresource( Matrixbuffer 0, NULL, &mat, 0, 0 ); //updating matrices

drawing the content:

immediatecontext->VSSetShader( vertexshader, NULL, 0 ); //using the vertexshader
	immediatecontext->VSSetConstantBuffers( 0, 1, &Matrixbuffer ); //assign matrices to the vertexshader
	immediatecontext->PSSetShader( pixelshader, NULL, 0 ); //using the pixelshader
	immediatecontext->Draw( 3, 0 ); //drawing three vertices (one single triangle)
	swapchain->Present( 0, 0 );

I guess there is a really easy solution to this problem but currently i dont know how i could fix that.

EDIT: Leaving the matrices Identity matrices doesnt solves the problem so the problem has to be inside the matrix assignment (without doing the matrix transformations it display the triangle)