10 replies to this topic

[Danisflying]

The reason why I want to create a second constant buffer is to render a second cube, Is there another way to create a duplicate of a cube .

[Asesh]

solution: instancing

[Hornsj3]

I believe there are more than one constant buffer register. If you want 2 distinct constant buffers you can create an array of constant buffers and pass that to your shader SetConstantBuffers(...) function.

[Danisflying]

How would I create that register ?

[Bacterius]

How are you creating your first constant buffer? That said you don't normally create a new constant buffer just to store a cube. Constant buffers are for stuff like camera position, world/view/projection matrices, shader parameters, etc... vertex and mesh data usually goes within the vertex declarations.

[kauna]

You create a second constant buffer in the same way as you create the first constant buffer.

Also, you may reuse a single constant buffer for different drawing calls. ie. fill constant buffer for the first cube, draw, re-fill the same constant buffer for the second cube (like with different world matrix and color etc), draw the second cube and so on.

Cheers!

[Danisflying]

I understand creating the second constant buffer, It how do I run both constant buffers at the same time using VSSetConstantBuffers function

[TiagoCosta]

I understand creating the second constant buffer, It how do I run both constant buffers at the same time using VSSetConstantBuffers function

Assuming you're using DirectX 11, you can declare two constant buffers in HLSL like this:

cbuffer cbuffer0 : register(b0)
{
     //..
}

cbuffer cbuffer1 : register(b1)
{
     //...
}

Then use:

ID3D11Buffer** ppCBuffers = {pCBuffer0, pCBuffer1};

VSSetConstantBuffers(0, 2, ppCBuffers);

[Hornsj3]

Assuming you're using DirectX 11, you can declare two constant buffers in HLSL like this:

Oh... I always assume 11

[Danisflying]

I'm getting an error when it comes to CreateVertexShader function

[kauna]

I'm getting an error when it comes to CreateVertexShader function

Which error do you get?

I am not following exactly what you are trying to accomplish since all the techniques to draw any object multiple times have been presented and you don't give a clue which option you are following. Read my previous post. It is the simplest way to draw the same cube as many times as you wish and you'll only need a single constant buffer for it.

Best regards!