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Fix fvardata interpolation on adaptive patches.

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This commit is contained in:
Takahito Tejima 2013-06-04 11:02:27 -07:00
parent 71b51eb16d
commit a6bf169344
5 changed files with 69 additions and 68 deletions
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125
examples/mayaViewer/OpenSubdivShader.cpp
View File

@ -131,13 +131,11 @@ static const char *defaultShaderSource =
// Draw styles for EffectDrawRegistry
enum Effect
{
kQuadFill = 0,
kQuadLine = 1,
kTriFill = 2,
kTriLine = 3,
kPoint = 4,
kFill = 0,
kLine = 1,
kPoint = 2,
};
typedef std::pair<OpenSubdiv::OsdPatchDescriptor, Effect> EffectDesc;
typedef std::pair<OpenSubdiv::OsdDrawContext::PatchDescriptor, Effect> EffectDesc;
// #### Override of OpenSubdiv::OsdGLDrawRegistry
//
@ -214,17 +212,20 @@ EffectDrawRegistry::_CreateDrawSourceConfig(DescType const & desc)
SourceConfigType * sconfig =
BaseRegistry::_CreateDrawSourceConfig(desc.first);
if (desc.first.type != OpenSubdiv::kNonPatch) {
// Per-vertex descriptors are use for uniform refinement
if (effect == kQuadFill) effect = kTriFill;
if (effect == kQuadLine) effect = kTriLine;
sconfig->geometryShader.AddDefine("SMOOTH_NORMALS");
} else {
bool quad = false;
if (desc.first.GetType() == OpenSubdiv::FarPatchTables::QUADS) {
// Configuration for adaptive refinement
sconfig->vertexShader.version = "#version 410\n";
sconfig->vertexShader.source = _shaderSource;
sconfig->vertexShader.AddDefine("VERTEX_SHADER");
quad = true;
} else if (desc.first.GetType() == OpenSubdiv::FarPatchTables::TRIANGLES) {
sconfig->vertexShader.version = "#version 410\n";
sconfig->vertexShader.source = _shaderSource;
sconfig->vertexShader.AddDefine("VERTEX_SHADER");
} else {
// adaptive patches
sconfig->geometryShader.AddDefine("SMOOTH_NORMALS");
}
assert(sconfig);
@ -254,29 +255,20 @@ EffectDrawRegistry::_CreateDrawSourceConfig(DescType const & desc)
sconfig->fragmentShader.AddDefine("FRAGMENT_SHADER");
// Set up directives according to draw style
if (quad) {
sconfig->geometryShader.AddDefine("PRIM_QUAD");
sconfig->fragmentShader.AddDefine("PRIM_QUAD");
} else {
sconfig->geometryShader.AddDefine("PRIM_TRI");
sconfig->fragmentShader.AddDefine("PRIM_TRI");
}
switch (effect) {
case kQuadFill:
sconfig->geometryShader.AddDefine("PRIM_QUAD");
case kFill:
sconfig->geometryShader.AddDefine("GEOMETRY_OUT_FILL");
sconfig->fragmentShader.AddDefine("PRIM_QUAD");
sconfig->fragmentShader.AddDefine("GEOMETRY_OUT_FILL");
break;
case kQuadLine:
sconfig->geometryShader.AddDefine("PRIM_QUAD");
case kLine:
sconfig->geometryShader.AddDefine("GEOMETRY_OUT_LINE");
sconfig->fragmentShader.AddDefine("PRIM_QUAD");
sconfig->fragmentShader.AddDefine("GEOMETRY_OUT_LINE");
break;
case kTriFill:
sconfig->geometryShader.AddDefine("PRIM_TRI");
sconfig->geometryShader.AddDefine("GEOMETRY_OUT_FILL");
sconfig->fragmentShader.AddDefine("PRIM_TRI");
sconfig->fragmentShader.AddDefine("GEOMETRY_OUT_FILL");
break;
case kTriLine:
sconfig->geometryShader.AddDefine("PRIM_TRI");
sconfig->geometryShader.AddDefine("GEOMETRY_OUT_LINE");
sconfig->fragmentShader.AddDefine("PRIM_TRI");
sconfig->fragmentShader.AddDefine("GEOMETRY_OUT_LINE");
break;
case kPoint:
@ -344,7 +336,7 @@ EffectDrawRegistry::_CreateDrawConfig(
if ((loc = glGetUniformLocation(config->program, "g_QuadOffsetBuffer")) != -1) {
glProgramUniform1i(config->program, loc, 2); // GL_TEXTURE2
}
if ((loc = glGetUniformLocation(config->program, "g_patchLevelBuffer")) != -1) {
if ((loc = glGetUniformLocation(config->program, "g_ptexIndicesBuffer")) != -1) {
glProgramUniform1i(config->program, loc, 3); // GL_TEXTURE3
}
if ((loc = glGetUniformLocation(config->program, "g_uvFVarBuffer")) != -1) {
@ -668,31 +660,36 @@ OpenSubdivShader::draw(const MHWRender::MDrawContext &mDrawContext,
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 3, 0);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, osdDrawContext->patchIndexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, osdDrawContext->GetPatchIndexBuffer());
// Get list of patches from OSD
OpenSubdiv::OsdPatchArrayVector const & patches =
OpenSubdiv::OsdDrawContext::PatchArrayVector const & patches =
osdDrawContext->patchArrays;
// Draw patches
for (size_t i = 0; i < patches.size(); ++i) {
OpenSubdiv::OsdPatchArray const & patch = patches[i];
OpenSubdiv::OsdDrawContext::PatchArray const & patch = patches[i];
bindProgram(mDrawContext, osdDrawContext, patch);
GLuint program = bindProgram(mDrawContext, osdDrawContext, patch);
if (patch.desc.type != OpenSubdiv::kNonPatch) {
glPatchParameteri(GL_PATCH_VERTICES, patch.desc.GetPatchSize());
GLuint uniformGregoryQuadOffset = glGetUniformLocation(program, "GregoryQuadOffsetBase");
GLuint uniformLevelBase = glGetUniformLocation(program, "LevelBase");
glProgramUniform1i(program, uniformGregoryQuadOffset, patch.GetQuadOffsetIndex());
glProgramUniform1i(program, uniformLevelBase, patch.GetPatchIndex());
glDrawElements(GL_PATCHES,
patch.numIndices, GL_UNSIGNED_INT,
reinterpret_cast<void *>(patch.firstIndex *
sizeof(unsigned int)));
} else {
glDrawElements(_scheme == OsdMeshData::kLoop ? GL_TRIANGLES : GL_LINES_ADJACENCY,
patch.numIndices, GL_UNSIGNED_INT,
reinterpret_cast<void *>(patch.firstIndex *
sizeof(unsigned int)));
GLenum primType = GL_PATCHES;
if (patch.GetDescriptor().GetType() == OpenSubdiv::FarPatchTables::QUADS) {
primType = GL_LINES_ADJACENCY;
} else if (patch.GetDescriptor().GetType() == OpenSubdiv::FarPatchTables::TRIANGLES) {
primType = GL_TRIANGLES;
} else if (patch.GetDescriptor().GetType() >= OpenSubdiv::FarPatchTables::REGULAR) {
glPatchParameteri(GL_PATCH_VERTICES, patch.GetDescriptor().GetNumControlVertices());
}
glDrawElements(primType,
patch.GetNumIndices(), GL_UNSIGNED_INT,
reinterpret_cast<void *>(patch.GetVertIndex() *
sizeof(unsigned int)));
CHECK_GL_ERROR("post draw\n");
}
@ -782,14 +779,14 @@ OpenSubdivShader::updateRegistry()
GLuint
OpenSubdivShader::bindProgram(const MHWRender::MDrawContext & mDrawContext,
OpenSubdiv::OsdGLDrawContext *osdDrawContext,
const OpenSubdiv::OsdPatchArray & patch)
const OpenSubdiv::OsdDrawContext::PatchArray & patch)
{
CHECK_GL_ERROR("bindProgram begin\n");
// Primitives are triangles for Loop subdivision, quads otherwise
Effect effect = (_scheme == OsdMeshData::kLoop) ? kTriFill : kQuadFill;
EffectDesc effectDesc( patch.desc, effect );
Effect effect = kFill;
EffectDesc effectDesc( patch.GetDescriptor(), effect );
// Build shader
EffectDrawRegistry::ConfigType *
@ -828,13 +825,9 @@ OpenSubdivShader::bindProgram(const MHWRender::MDrawContext & mDrawContext,
// Update and bind tessellation state
struct Tessellation {
float TessLevel;
int GregoryQuadOffsetBase;
int LevelBase;
} tessellationData;
tessellationData.TessLevel = static_cast<float>(1 << _tessFactor);
tessellationData.GregoryQuadOffsetBase = patch.gregoryQuadOffsetBase;
tessellationData.LevelBase = patch.levelBase;
if (!g_tessellationUB) {
glGenBuffers(1, &g_tessellationUB);
@ -932,30 +925,30 @@ OpenSubdivShader::bindProgram(const MHWRender::MDrawContext & mDrawContext,
// GL texture buffers. These are managed by the DrawContext
// and must be bound for use by the program in addition to
// any buffers used by the client/application shading code.
if (osdDrawContext->vertexTextureBuffer) {
if (osdDrawContext->GetVertexTextureBuffer()) {
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->vertexTextureBuffer);
osdDrawContext->GetVertexTextureBuffer());
}
if (osdDrawContext->vertexValenceTextureBuffer) {
if (osdDrawContext->GetVertexValenceTextureBuffer()) {
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->vertexValenceTextureBuffer);
osdDrawContext->GetVertexValenceTextureBuffer());
}
if (osdDrawContext->quadOffsetTextureBuffer) {
if (osdDrawContext->GetQuadOffsetsTextureBuffer()) {
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->quadOffsetTextureBuffer);
osdDrawContext->GetQuadOffsetsTextureBuffer());
}
if (osdDrawContext->patchLevelTextureBuffer) {
if (osdDrawContext->GetPatchParamTextureBuffer()) {
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->patchLevelTextureBuffer);
osdDrawContext->GetPatchParamTextureBuffer());
}
if (osdDrawContext->fvarDataTextureBuffer) {
glActiveTexture( GL_TEXTURE4 );
glBindTexture( GL_TEXTURE_BUFFER,
osdDrawContext->fvarDataTextureBuffer );
if (osdDrawContext->GetFvarDataTextureBuffer()) {
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->GetFvarDataTextureBuffer() );
}
glActiveTexture(GL_TEXTURE0);

2
examples/mayaViewer/OpenSubdivShader.h
View File

@ -123,7 +123,7 @@ private:
GLuint bindTexture(const MString& filename, int textureUnit);
GLuint bindProgram(const MHWRender::MDrawContext & mDrawContext,
OpenSubdiv::OsdGLDrawContext *osdDrawContext,
const OpenSubdiv::OsdPatchArray & patch);
const OpenSubdiv::OsdDrawContext::PatchArray & patch);
// OSD attributes
static MObject aLevel;

3
examples/mayaViewer/shader.glsl
View File

@ -170,7 +170,8 @@ void emitAdaptive(int index, vec3 normal, vec2 uvs[4])
#endif
// Bi-linear interpolation within the patch
vec2 st = input[index].v.patchCoord.st;
output.v.patchCoord = input[index].v.patchCoord;
vec2 st = input[index].v.tessCoord;
output.v.patchCoord.st =
vec2( mix( mix(uvs[0].x, uvs[1].x, st.s ), mix(uvs[3].x, uvs[2].x, st.s ), st.t),
mix( mix(uvs[0].y, uvs[1].y, st.s ), mix(uvs[3].y, uvs[2].y, st.s ), st.t) );

5
opensubdiv/osd/glDrawContext.h
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@ -157,6 +157,11 @@ public:
return _quadOffsetsTextureBuffer;
}
/// Returns the GL texture buffer containing fvar data
GLuint GetFvarDataTextureBuffer() const {
return _fvarDataTextureBuffer;
}
protected:
GLuint _patchIndexBuffer;

2
opensubdiv/osd/glslPatchCommon.glsl
View File

@ -82,6 +82,7 @@ struct OutputVertex {
vec3 normal;
vec3 tangent;
centroid vec4 patchCoord; // u, v, level, faceID
centroid vec2 tessCoord; // tesscoord.st
noperspective vec4 edgeDistance;
#if OSD_NUM_VARYINGS > 0
float varyings[OSD_NUM_VARYINGS];
@ -191,6 +192,7 @@ int GetPatchLevel()
ivec2 p = input[0].v.ptexInfo.xy; \
int lv = input[0].v.ptexInfo.z; \
int rot = input[0].v.ptexInfo.w; \
output.v.tessCoord.xy = uv; \
uv.xy = float(rot==0)*uv.xy \
+ float(rot==1)*vec2(1.0-uv.y, uv.x) \
+ float(rot==2)*vec2(1.0-uv.x, 1.0-uv.y) \