WireFrame using HLSL 5

Denis · 2013-03-31T05:30:31

Hello, Could someone write how to make wireframe using HLSL? Now I have the following code inside vertex shader: cbuffer MatrixBuffer { matrix worldMatrix; matrix viewMatrix; matrix projectionMatrix; }; ////////////// // TYPEDEFS // ////////////// struct VertexInputType { float4 position : POSITION; float2 tex : TEXCOORD0; float3 normal : NORMAL; }; struct PixelInputType { float4 position : SV_POSITION; float2 tex : TEXCOORD0; float3 normal : NORMAL; }; //////////////////////////////////////////////////////////////////////////////// // Vertex Shader //////////////////////////////////////////////////////////////////////////////// PixelInputType LightVertexShader(VertexInputType input) { const float C = 0.1f; float Far = 100000000.0f; PixelInputType output; // Change the position vector to be 4 units for proper matrix calculations. input.position.w = 1.0f; // Calculate the position of the vertex against the world, view, and projection matrices. output.position = mul(input.position, worldMatrix); //???????????, ???????? ? ???????? ????????? output.position = mul(output.position, viewMatrix); output.position = mul(output.position, projectionMatrix); output.position.z = log(C*output.position.z + 1) / log(C*Far + 1) * output.position.w; // Store the texture coordinates for the pixel shader. output.tex = input.tex; // Calculate the normal vector against the world matrix only. output.normal = mul(input.normal, (float3x3)worldMatrix); // Normalize the normal vector. output.normal = normalize(output.normal); return output; } What I need to add to have a possibility switch wireframe on and off using only shader?

Graphics and GPU Programming Programming

Started by BlackJoker March 30, 2013 11:03 AM

10 comments, last by Yourself 11 years ago

BlackJoker

1,338

Author

March 30, 2013 08:23 PM

Jason Z

Thanks for the information. I thought that drawing wireframe with shaders will not repduce performance, but I was wrong.

Yourself

1,962

March 31, 2013 05:30 AM

Solid witeframe (http://developer.download.nvidia.com/SDK/10.5/direct3d/Source/SolidWireframe/Doc/SolidWireframe.pdf ) is the technique I prefer.

Is there an example how to implement this? In pdf I di?nt find it.

http://developer.download.nvidia.com/SDK/10/direct3d/samples.html#SolidWireframe

WireFrame using HLSL 5

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WireFrame using HLSL 5

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