mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-11-29 14:51:05 +00:00
10c687ecd5
- [Feature Adaptive GPU Rendering of Catmull-Clark Surfaces](http://research.microsoft.com/en-us/um/people/cloop/tog2012.pdf). - New API architecture : we are planning to lock on to this new framework as the basis for backward compatibility, which we will enforce from Release 1.0 onward. Subsequent releases of OpenSubdiv should not break client code. - DirectX 11 support - and much more...
344 lines
12 KiB
HLSL
Executable File
344 lines
12 KiB
HLSL
Executable File
//
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// Copyright (C) Pixar. All rights reserved.
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//
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// This license governs use of the accompanying software. If you
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// use the software, you accept this license. If you do not accept
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// the license, do not use the software.
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//
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// 1. Definitions
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// The terms "reproduce," "reproduction," "derivative works," and
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// "distribution" have the same meaning here as under U.S.
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// copyright law. A "contribution" is the original software, or
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// any additions or changes to the software.
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// A "contributor" is any person or entity that distributes its
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// contribution under this license.
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// "Licensed patents" are a contributor's patent claims that read
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// directly on its contribution.
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//
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// 2. Grant of Rights
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// (A) Copyright Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free copyright license to reproduce its contribution,
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// prepare derivative works of its contribution, and distribute
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// its contribution or any derivative works that you create.
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// (B) Patent Grant- Subject to the terms of this license,
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// including the license conditions and limitations in section 3,
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// each contributor grants you a non-exclusive, worldwide,
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// royalty-free license under its licensed patents to make, have
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// made, use, sell, offer for sale, import, and/or otherwise
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// dispose of its contribution in the software or derivative works
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// of the contribution in the software.
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//
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// 3. Conditions and Limitations
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// (A) No Trademark License- This license does not grant you
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// rights to use any contributor's name, logo, or trademarks.
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// (B) If you bring a patent claim against any contributor over
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// patents that you claim are infringed by the software, your
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// patent license from such contributor to the software ends
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// automatically.
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// (C) If you distribute any portion of the software, you must
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// retain all copyright, patent, trademark, and attribution
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// notices that are present in the software.
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// (D) If you distribute any portion of the software in source
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// code form, you may do so only under this license by including a
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// complete copy of this license with your distribution. If you
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// distribute any portion of the software in compiled or object
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// code form, you may only do so under a license that complies
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// with this license.
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// (E) The software is licensed "as-is." You bear the risk of
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// using it. The contributors give no express warranties,
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// guarantees or conditions. You may have additional consumer
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// rights under your local laws which this license cannot change.
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// To the extent permitted under your local laws, the contributors
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// exclude the implied warranties of merchantability, fitness for
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// a particular purpose and non-infringement.
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//
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struct OutputPointVertex {
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float4 positionOut : SV_Position;
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};
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// ---------------------------------------------------------------------------
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// Vertex Shader
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// ---------------------------------------------------------------------------
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void vs_main( in InputVertex input,
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out OutputVertex output )
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{
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output.positionOut = mul(ModelViewProjectionMatrix, input.position);
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output.position = mul(ModelViewMatrix, input.position);
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output.normal = mul(ModelViewMatrix,float4(input.normal, 0)).xyz;
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}
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// ---------------------------------------------------------------------------
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// Geometry Shader
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// ---------------------------------------------------------------------------
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OutputVertex
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outputVertex(OutputVertex input, float3 normal)
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{
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OutputVertex v = input;
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v.normal = normal;
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return v;
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}
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#if defined(GEOMETRY_OUT_WIRE) || defined(GEOMETRY_OUT_LINE)
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#ifdef PRIM_TRI
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#define EDGE_VERTS 3
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#endif
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#ifdef PRIM_QUAD
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#define EDGE_VERTS 4
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#endif
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static float VIEWPORT_SCALE = 1024.0; // XXXdyu
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float edgeDistance(float2 p, float2 p0, float2 p1)
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{
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return VIEWPORT_SCALE *
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abs((p.x - p0.x) * (p1.y - p0.y) -
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(p.y - p0.y) * (p1.x - p0.x)) / length(p1.xy - p0.xy);
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}
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OutputVertex
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outputWireVertex(OutputVertex input, float3 normal,
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int index, float2 edgeVerts[EDGE_VERTS])
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{
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OutputVertex v = input;
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v.normal = normal;
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v.edgeDistance[0] =
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edgeDistance(edgeVerts[index], edgeVerts[0], edgeVerts[1]);
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v.edgeDistance[1] =
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edgeDistance(edgeVerts[index], edgeVerts[1], edgeVerts[2]);
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#ifdef PRIM_TRI
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v.edgeDistance[2] =
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edgeDistance(edgeVerts[index], edgeVerts[2], edgeVerts[0]);
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#endif
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#ifdef PRIM_QUAD
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v.edgeDistance[2] =
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edgeDistance(edgeVerts[index], edgeVerts[2], edgeVerts[3]);
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v.edgeDistance[3] =
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edgeDistance(edgeVerts[index], edgeVerts[3], edgeVerts[0]);
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#endif
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return v;
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}
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#endif
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[maxvertexcount(6)]
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void gs_quad( lineadj OutputVertex input[4],
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inout TriangleStream<OutputVertex> triStream )
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{
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float3 A = (input[0].position - input[1].position).xyz;
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float3 B = (input[3].position - input[1].position).xyz;
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float3 C = (input[2].position - input[1].position).xyz;
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float3 n0 = normalize(cross(B, A));
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triStream.Append(outputVertex(input[0], n0));
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triStream.Append(outputVertex(input[1], n0));
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triStream.Append(outputVertex(input[3], n0));
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triStream.RestartStrip();
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triStream.Append(outputVertex(input[3], n0));
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triStream.Append(outputVertex(input[1], n0));
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triStream.Append(outputVertex(input[2], n0));
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triStream.RestartStrip();
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}
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#if defined(GEOMETRY_OUT_WIRE) || defined(GEOMETRY_OUT_LINE)
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#ifdef PRIM_QUAD
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[maxvertexcount(6)]
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void gs_quad_wire( lineadj OutputVertex input[4],
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inout TriangleStream<OutputVertex> triStream )
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{
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float3 A = (input[0].position - input[1].position).xyz;
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float3 B = (input[3].position - input[1].position).xyz;
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float3 C = (input[2].position - input[1].position).xyz;
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float3 n0 = normalize(cross(B, A));
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float2 edgeVerts[4];
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edgeVerts[0] = input[0].positionOut.xy / input[0].positionOut.w;
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edgeVerts[1] = input[1].positionOut.xy / input[1].positionOut.w;
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edgeVerts[2] = input[2].positionOut.xy / input[2].positionOut.w;
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edgeVerts[3] = input[3].positionOut.xy / input[3].positionOut.w;
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triStream.Append(outputWireVertex(input[0], n0, 0, edgeVerts));
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triStream.Append(outputWireVertex(input[1], n0, 1, edgeVerts));
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triStream.Append(outputWireVertex(input[3], n0, 3, edgeVerts));
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triStream.RestartStrip();
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triStream.Append(outputWireVertex(input[3], n0, 3, edgeVerts));
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triStream.Append(outputWireVertex(input[1], n0, 1, edgeVerts));
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triStream.Append(outputWireVertex(input[2], n0, 2, edgeVerts));
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triStream.RestartStrip();
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}
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#endif
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#endif
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[maxvertexcount(3)]
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void gs_triangle( triangle OutputVertex input[3],
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inout TriangleStream<OutputVertex> triStream )
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{
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float3 A = (input[0].position - input[1].position).xyz;
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float3 B = (input[2].position - input[1].position).xyz;
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float3 n0 = normalize(cross(B, A));
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triStream.Append(outputVertex(input[0], n0));
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triStream.Append(outputVertex(input[1], n0));
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triStream.Append(outputVertex(input[2], n0));
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}
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[maxvertexcount(3)]
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void gs_triangle_smooth( triangle OutputVertex input[3],
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inout TriangleStream<OutputVertex> triStream )
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{
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triStream.Append(outputVertex(input[0], input[0].normal));
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triStream.Append(outputVertex(input[1], input[1].normal));
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triStream.Append(outputVertex(input[2], input[2].normal));
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}
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#if defined(GEOMETRY_OUT_WIRE) || defined(GEOMETRY_OUT_LINE)
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#ifdef PRIM_TRI
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[maxvertexcount(3)]
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void gs_triangle_wire( triangle OutputVertex input[3],
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inout TriangleStream<OutputVertex> triStream )
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{
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float3 A = (input[0].position - input[1].position).xyz;
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float3 B = (input[2].position - input[1].position).xyz;
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float3 n0 = normalize(cross(B, A));
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float2 edgeVerts[3];
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edgeVerts[0] = input[0].positionOut.xy / input[0].positionOut.w;
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edgeVerts[1] = input[1].positionOut.xy / input[1].positionOut.w;
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edgeVerts[2] = input[2].positionOut.xy / input[2].positionOut.w;
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triStream.Append(outputWireVertex(input[0], n0, 0, edgeVerts));
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triStream.Append(outputWireVertex(input[1], n0, 1, edgeVerts));
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triStream.Append(outputWireVertex(input[2], n0, 2, edgeVerts));
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}
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[maxvertexcount(3)]
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void gs_triangle_smooth_wire( triangle OutputVertex input[3],
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inout TriangleStream<OutputVertex> triStream )
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{
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float2 edgeVerts[3];
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edgeVerts[0] = input[0].positionOut.xy / input[0].positionOut.w;
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edgeVerts[1] = input[1].positionOut.xy / input[1].positionOut.w;
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edgeVerts[2] = input[2].positionOut.xy / input[2].positionOut.w;
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triStream.Append(outputWireVertex(input[0], input[0].normal, 0, edgeVerts));
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triStream.Append(outputWireVertex(input[1], input[1].normal, 1, edgeVerts));
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triStream.Append(outputWireVertex(input[2], input[2].normal, 2, edgeVerts));
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}
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#endif
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#endif
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[maxvertexcount(1)]
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void gs_point( point OutputVertex input[1],
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inout PointStream<OutputPointVertex> pointStream )
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{
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OutputPointVertex v0;
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v0.positionOut = input[0].positionOut;
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pointStream.Append(v0);
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}
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// ---------------------------------------------------------------------------
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// Lighting
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// ---------------------------------------------------------------------------
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#define NUM_LIGHTS 2
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struct LightSource {
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float4 position;
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float4 ambient;
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float4 diffuse;
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float4 specular;
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};
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cbuffer Lighting : register( b2 ) {
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LightSource lightSource[NUM_LIGHTS];
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};
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float4
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lighting(float3 Peye, float3 Neye)
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{
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float4 color = float4(0.0, 0.0, 0.0, 0.0);
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//float4 material = float4(0.4, 0.4, 0.8, 1);
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float4 material = float4(0.13, 0.13, 0.61, 1); // sRGB (gamma 2.2)
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for (int i = 0; i < NUM_LIGHTS; ++i) {
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float4 Plight = lightSource[i].position;
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float3 l = (Plight.w == 0.0)
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? normalize(Plight.xyz) : normalize(Plight.xyz - Peye);
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float3 n = normalize(Neye);
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float3 h = normalize(l + float3(0,0,1)); // directional viewer
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float d = max(0.0, dot(n, l));
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float s = pow(max(0.0, dot(n, h)), 500.0f);
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color += lightSource[i].ambient * material
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+ d * lightSource[i].diffuse * material
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+ s * lightSource[i].specular;
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}
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color.a = 1.0;
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return color;
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}
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// ---------------------------------------------------------------------------
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// Pixel Shader
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// ---------------------------------------------------------------------------
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float4
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edgeColor(float4 Cfill, float4 edgeDistance)
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{
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#if defined(GEOMETRY_OUT_WIRE) || defined(GEOMETRY_OUT_LINE)
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#ifdef PRIM_TRI
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float d =
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min(edgeDistance[0], min(edgeDistance[1], edgeDistance[2]));
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#endif
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#ifdef PRIM_QUAD
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float d =
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min(min(edgeDistance[0], edgeDistance[1]),
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min(edgeDistance[2], edgeDistance[3]));
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#endif
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float4 Cedge = float4(1.0, 1.0, 0.0, 1.0);
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float p = exp2(-2 * d * d);
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#if defined(GEOMETRY_OUT_WIRE)
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if (p < 0.25) discard;
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#endif
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Cfill.rgb = lerp(Cfill.rgb, Cedge.rgb, p);
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#endif
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return Cfill;
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}
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// ---------------------------------------------------------------------------
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// Pixel Shader
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// ---------------------------------------------------------------------------
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void
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ps_main( in OutputVertex input,
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bool isFrontFacing : SV_IsFrontFace,
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out float4 colorOut : SV_Target )
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{
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float3 N = (isFrontFacing ? input.normal : -input.normal);
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colorOut = edgeColor(lighting(input.position.xyz, N), input.edgeDistance);
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}
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void
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ps_main_point( in OutputPointVertex input,
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out float4 colorOut : SV_Target )
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{
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colorOut = float4(1, 1, 1, 1);
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}
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