/*
From the draw context, get the list of lights and queue the ones we are interested in
into the "desired list"
*/
MStatus shadowPrepass::execute( const MHWRender::MDrawContext & context )
{
MHWRender::MRenderer* theRenderer = MHWRender::MRenderer::theRenderer();
if (!theRenderer)
return MStatus::kSuccess;
// Skip lighting modes where there are no lights which can
// cast shadows
MHWRender::MDrawContext::LightingMode lightingMode = context.getLightingMode();
if (lightingMode != MHWRender::MDrawContext::kSelectedLights &&
lightingMode != MHWRender::MDrawContext::kSceneLights)
{
return MStatus::kSuccess;
}
MHWRender::MDrawContext::LightFilter lightFilter =
MHWRender::MDrawContext::kFilteredIgnoreLightLimit;
unsigned int nbSceneLights = context.numberOfActiveLights(lightFilter);
for (unsigned int i=0; i<nbSceneLights; i++)
{
MHWRender::MLightParameterInformation* lightInfo =
context.getLightParameterInformation( i, lightFilter );
if (!lightInfo)
continue;
// Get the actually Maya light node
MStatus status = MStatus::kFailure;
MDagPath lightPath = lightInfo->lightPath(&status);
if (status != MStatus::kSuccess || !lightPath.isValid())
continue;
// Would be good to have an API method here to indicate if it
// casts shadows
MIntArray intVals;
// Check if light is enabled, and emits any lighting
MHWRender::MLightParameterInformation::StockParameterSemantic semantic =
MHWRender::MLightParameterInformation::kLightEnabled;
if (MStatus::kSuccess == lightInfo->getParameter( semantic, intVals ))
{
if (intVals.length())
{
if (intVals[0] == 0)
continue;
}
}
semantic = MHWRender::MLightParameterInformation::kEmitsDiffuse;
if (MStatus::kSuccess == lightInfo->getParameter( semantic, intVals ))
{
if (intVals.length())
{
if (intVals[0] == 0)
continue;
}
}
semantic = MHWRender::MLightParameterInformation::kEmitsSpecular;
if (MStatus::kSuccess == lightInfo->getParameter( semantic, intVals ))
{
if (intVals.length())
{
if (intVals[0] == 0)
continue;
}
}
// Check if local shadows are enabled.
semantic = MHWRender::MLightParameterInformation::kShadowOn;
if (MStatus::kSuccess == lightInfo->getParameter( semantic, intVals ))
{
if (intVals.length())
{
if (intVals[0] == 0)
continue;
}
}
// Check if the shadow is "dirty"
bool shadowIsDirty = false;
semantic = MHWRender::MLightParameterInformation::kShadowDirty;
if (MStatus::kSuccess == lightInfo->getParameter( semantic, intVals ))
{
if (intVals.length())
{
if (intVals[0] == 0)
// continue;
shadowIsDirty = intVals[0] != 0 ? true : false ;
}
}
// Check the light list to prune, if not already pruned
bool prune = false;
if (lightingMode != MHWRender::MDrawContext::kSelectedLights)
{
if (mLightList && mLightList->length())
{
prune = !mLightList->hasItem(lightInfo->lightPath());
}
}
static bool debugShadowRequests = false;
// Set that we require shadows for this light
if (!prune)
{
if (debugShadowRequests)
fprintf(stderr, "QUEUE light shadows for %s, shadowDirty = %d\n",
lightPath.fullPathName().asChar(), shadowIsDirty);
theRenderer->setLightRequiresShadows( lightPath.node(), true );
}
// Set that we DON'T require shadows for this light
else
{
if (debugShadowRequests)
fprintf(stderr, "DEQUEUE light shadows for %s, shadowDirty = %d\n",
lightPath.fullPathName().asChar(), shadowIsDirty);
theRenderer->setLightRequiresShadows( lightPath.node(), false );
}
}
return MStatus::kSuccess;
}
GLuint
OpenSubdivPtexShader::bindProgram(const MHWRender::MDrawContext & mDrawContext,
OpenSubdiv::OsdGLDrawContext *osdDrawContext,
const OpenSubdiv::OsdPatchArray & patch)
{
CHECK_GL_ERROR("bindProgram begin\n");
// Build shader
Effect effect;
effect.color = _enableColor;
effect.occlusion = _enableOcclusion;
effect.displacement = _enableDisplacement;
effect.normal = _enableNormal;
EffectDesc effectDesc( patch.desc, effect );
EffectDrawRegistry::ConfigType *
config = effectRegistry.GetDrawConfig(effectDesc);
// Install shader
GLuint program = config->program;
glUseProgram(program);
// Update and bind transform state
struct Transform {
float ModelViewMatrix[16];
float ProjectionMatrix[16];
float ModelViewProjectionMatrix[16];
} transformData;
setMatrix(mDrawContext.getMatrix(MHWRender::MDrawContext::kWorldViewMtx),
transformData.ModelViewMatrix);
setMatrix(mDrawContext.getMatrix(MHWRender::MDrawContext::kProjectionMtx),
transformData.ProjectionMatrix);
setMatrix(mDrawContext.getMatrix(MHWRender::MDrawContext::kWorldViewProjMtx),
transformData.ModelViewProjectionMatrix);
if (!g_transformUB) {
glGenBuffers(1, &g_transformUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_transformUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(transformData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_transformUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(transformData), &transformData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER, g_transformBinding, g_transformUB);
// Update and bind tessellation state
struct Tessellation {
float TessLevel;
int GregoryQuadOffsetBase;
int PrimitiveIdBase;
} tessellationData;
tessellationData.TessLevel = static_cast<float>(1 << _tessFactor);
tessellationData.GregoryQuadOffsetBase = patch.GetQuadOffsetBase;
tessellationData.PrimitiveIdBase = patch.GetPatchIndex();;
if (!g_tessellationUB) {
glGenBuffers(1, &g_tessellationUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_tessellationUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(tessellationData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_tessellationUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(tessellationData), &tessellationData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER,
g_tessellationBinding,
g_tessellationUB);
#ifdef USE_NON_IMAGE_BASED_LIGHTING
// Update and bind lighting state
int numLights = mDrawContext.numberOfActiveLights();
struct Lighting {
struct Light {
float position[4];
float diffuse[4];
float ambient[4];
float specular[4];
} lightSource[2];
} lightingData;
memset(&lightingData, 0, sizeof(lightingData));
for (int i = 0; i < numLights && i < 1; ++i) {
MFloatPointArray positions;
MFloatVector direction;
float intensity;
MColor color;
bool hasDirection, hasPosition;
mDrawContext.getLightInformation(i, positions, direction, intensity,
color, hasDirection, hasPosition);
Lighting::Light &light = lightingData.lightSource[i];
if (hasDirection) {
light.position[0] = -direction[0];
light.position[1] = -direction[1];
light.position[2] = -direction[2];
for (int j = 0; j < 4; ++j) {
light.diffuse[j] = color[j] * intensity;
light.ambient[j] = color[j] * intensity;
light.specular[j] = color[j] * intensity;
}
}
}
if (!g_lightingUB) {
glGenBuffers(1, &g_lightingUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_lightingUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(lightingData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_lightingUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(lightingData), &lightingData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER, g_lightingBinding, g_lightingUB);
#endif
GLint eye = glGetUniformLocation(program, "eyePositionInWorld");
MPoint e = MPoint(0, 0, 0) *
mDrawContext.getMatrix(MHWRender::MDrawContext::kWorldViewInverseMtx);
glProgramUniform3f(program, eye,
static_cast<float>(e.x),
static_cast<float>(e.y),
static_cast<float>(e.z));
// update other uniforms
float color[4] = { 0, 0, 0, 1 };
_diffuse.get(color);
glProgramUniform4fv(program,
glGetUniformLocation(program, "diffuseColor"),
1, color);
_ambient.get(color);
glProgramUniform4fv(program,
glGetUniformLocation(program, "ambientColor"),
1, color);
_specular.get(color);
glProgramUniform4fv(program,
glGetUniformLocation(program, "specularColor"),
1, color);
glProgramUniform1f(program,
glGetUniformLocation(program, "fresnelBias"),
_fresnelBias);
glProgramUniform1f(program,
glGetUniformLocation(program, "fresnelScale"),
_fresnelScale);
glProgramUniform1f(program,
glGetUniformLocation(program, "fresnelPower"),
_fresnelPower);
// Ptex bindings
// color ptex
if (effectRegistry.getPtexColorValid()) {
GLint texData = glGetUniformLocation(program, "textureImage_Data");
glProgramUniform1i(program, texData, CLR_TEXTURE_UNIT + 0);
GLint texPacking = glGetUniformLocation(program, "textureImage_Packing");
glProgramUniform1i(program, texPacking, CLR_TEXTURE_UNIT + 1);
GLint texPages = glGetUniformLocation(program, "textureImage_Pages");
glProgramUniform1i(program, texPages, CLR_TEXTURE_UNIT + 2);
}
// displacement ptex
if (effectRegistry.getPtexDisplacementValid()) {
GLint texData = glGetUniformLocation(program, "textureDisplace_Data");
glProgramUniform1i(program, texData, DISP_TEXTURE_UNIT + 0);
GLint texPacking = glGetUniformLocation(program, "textureDisplace_Packing");
glProgramUniform1i(program, texPacking, DISP_TEXTURE_UNIT + 1);
GLint texPages = glGetUniformLocation(program, "textureDisplace_Pages");
glProgramUniform1i(program, texPages, DISP_TEXTURE_UNIT + 2);
}
// occlusion ptex
if (effectRegistry.getPtexOcclusionValid()) {
GLint texData = glGetUniformLocation(program, "textureOcclusion_Data");
glProgramUniform1i(program, texData, OCC_TEXTURE_UNIT + 0);
GLint texPacking = glGetUniformLocation(program, "textureOcclusion_Packing");
glProgramUniform1i(program, texPacking, OCC_TEXTURE_UNIT + 1);
GLint texPages = glGetUniformLocation(program, "textureOcclusion_Pages");
glProgramUniform1i(program, texPages, OCC_TEXTURE_UNIT + 2);
}
// diffuse environment map
if (effectRegistry.getDiffuseEnvironmentId() != 0) {
GLint difmap = glGetUniformLocation(program, "diffuseEnvironmentMap");
glProgramUniform1i(program, difmap, DIFF_TEXTURE_UNIT);
}
// specular environment map
if (effectRegistry.getSpecularEnvironmentId() != 0) {
GLint envmap = glGetUniformLocation(program, "specularEnvironmentMap");
glProgramUniform1i(program, envmap, ENV_TEXTURE_UNIT);
}
glActiveTexture(GL_TEXTURE0);
CHECK_GL_ERROR("bindProgram leave\n");
return program;
}
/*
Utility method to update shader parameters based on available
lighting information.
*/
static void updateLightShader( MHWRender::MShaderInstance *shaderInstance,
const MHWRender::MDrawContext & context,
const MSelectionList * lightList )
{
if (!shaderInstance)
return;
// Check pass context information to see if we are in a shadow
// map update pass. If so do nothing.
//
const MHWRender::MPassContext & passCtx = context.getPassContext();
const MStringArray & passSem = passCtx.passSemantics();
bool handlePass = true;
for (unsigned int i=0; i<passSem.length() && handlePass; i++)
{
// Handle special pass drawing.
//
if (passSem[i] == MHWRender::MPassContext::kShadowPassSemantic)
{
handlePass = false;
}
}
if (!handlePass) return;
//
// Perform light shader update with lighting information
// If the light list is not empty then use that light's information.
// Otherwise choose the first appropriate light which can cast shadows.
//
// Defaults in case there are no lights
//
bool globalShadowsOn = false;
bool localShadowsOn = false;
bool shadowDirty = false;
MFloatVector direction(0.0f, 0.0f, 1.0f);
float lightIntensity = 0.0f; // If no lights then black out the light
float lightColor[3] = { 0.0f, 0.0f, 0.0f };
MStatus status;
// Scan to find the first N lights that has a direction component in it
// It's possible we find no lights.
//
MHWRender::MDrawContext::LightFilter considerAllSceneLights = MHWRender::MDrawContext::kFilteredIgnoreLightLimit;
unsigned int lightCount = context.numberOfActiveLights(considerAllSceneLights);
if (lightCount)
{
MFloatArray floatVals;
MIntArray intVals;
MHWRender::MTextureAssignment shadowResource;
shadowResource.texture = NULL;
MHWRender::MSamplerStateDesc samplerDesc;
MMatrix shadowViewProj;
float shadowColor[3] = { 0.0f, 0.0f, 0.0f };
unsigned int i=0;
bool foundDirectional = false;
for (i=0; i<lightCount && !foundDirectional ; i++)
{
MHWRender::MLightParameterInformation *lightParam = context.getLightParameterInformation( i, considerAllSceneLights );
if (lightParam)
{
// Prune against light list if any.
if (lightList && lightList->length())
{
if (!lightList->hasItem(lightParam->lightPath()))
continue;
}
MStringArray params;
lightParam->parameterList(params);
for (unsigned int p=0; p<params.length(); p++)
{
MString pname = params[p];
MHWRender::MLightParameterInformation::StockParameterSemantic semantic = lightParam->parameterSemantic( pname );
switch (semantic)
{
// Pick a few light parameters to pick up as an example
case MHWRender::MLightParameterInformation::kWorldDirection:
lightParam->getParameter( pname, floatVals );
direction = MFloatVector( floatVals[0], floatVals[1], floatVals[2] );
foundDirectional = true;
break;
case MHWRender::MLightParameterInformation::kIntensity:
lightParam->getParameter( pname, floatVals );
lightIntensity = floatVals[0];
break;
case MHWRender::MLightParameterInformation::kColor:
lightParam->getParameter( pname, floatVals );
lightColor[0] = floatVals[0];
lightColor[1] = floatVals[1];
lightColor[2] = floatVals[2];
break;
// Pick up shadowing parameters
case MHWRender::MLightParameterInformation::kGlobalShadowOn:
lightParam->getParameter( pname, intVals );
if (intVals.length())
globalShadowsOn = (intVals[0] != 0) ? true : false;
break;
case MHWRender::MLightParameterInformation::kShadowOn:
lightParam->getParameter( pname, intVals );
if (intVals.length())
localShadowsOn = (intVals[0] != 0) ? true : false;
break;
case MHWRender::MLightParameterInformation::kShadowViewProj:
lightParam->getParameter( pname, shadowViewProj);
break;
case MHWRender::MLightParameterInformation::kShadowMap:
lightParam->getParameter( pname, shadowResource );
break;
case MHWRender::MLightParameterInformation::kShadowDirty:
if (intVals.length())
shadowDirty = (intVals[0] != 0) ? true : false;
break;
case MHWRender::MLightParameterInformation::kShadowSamp:
lightParam->getParameter( pname, samplerDesc );
break;
case MHWRender::MLightParameterInformation::kShadowColor:
lightParam->getParameter( pname, floatVals );
shadowColor[0] = floatVals[0];
shadowColor[1] = floatVals[1];
shadowColor[2] = floatVals[2];
break;
default:
break;
}
} /* for params */
}
if (foundDirectional && globalShadowsOn && localShadowsOn && shadowResource.texture)
{
void *resourceHandle = shadowResource.texture->resourceHandle();
if (resourceHandle)
{
static bool debugShadowBindings = false;
status = shaderInstance->setParameter("mayaShadowPCF1_shadowMap", shadowResource );
if (status == MStatus::kSuccess && debugShadowBindings)
fprintf(stderr, "Bound shadow map to shader param mayaShadowPCF1_shadowMap\n");
status = shaderInstance->setParameter("mayaShadowPCF1_shadowViewProj", shadowViewProj );
if (status == MStatus::kSuccess && debugShadowBindings)
fprintf(stderr, "Bound shadow map transform to shader param mayaShadowPCF1_shadowViewProj\n");
status = shaderInstance->setParameter("mayaShadowPCF1_shadowColor", &shadowColor[0] );
if (status == MStatus::kSuccess && debugShadowBindings)
fprintf(stderr, "Bound shadow map color to shader param mayaShadowPCF1_shadowColor\n");
}
MHWRender::MRenderer* renderer = MHWRender::MRenderer::theRenderer();
if (renderer)
{
MHWRender::MTextureManager* textureManager = renderer->getTextureManager();
if (textureManager)
{
textureManager->releaseTexture(shadowResource.texture);
}
}
shadowResource.texture = NULL;
}
}
}
// Set up parameters which should be set regardless of light existence.
status = shaderInstance->setParameter("mayaDirectionalLight_direction", &( direction[0] ));
status = shaderInstance->setParameter("mayaDirectionalLight_intensity", lightIntensity );
status = shaderInstance->setParameter("mayaDirectionalLight_color", &( lightColor[0] ));
status = shaderInstance->setParameter("mayaShadowPCF1_mayaGlobalShadowOn", globalShadowsOn);
status = shaderInstance->setParameter("mayaShadowPCF1_mayaShadowOn", localShadowsOn);
}
// #### bindProgram
//
// Do all the work to build and install shader including
// set up buffer blocks for uniform variables, set up
// default lighting parameters, pass material uniforms
// and bind texture buffers used by texture maps and by
// OpenSubdiv's built-in shading code.
//
GLuint
OpenSubdivShader::bindProgram(const MHWRender::MDrawContext & mDrawContext,
OpenSubdiv::OsdGLDrawContext *osdDrawContext,
const OpenSubdiv::OsdDrawContext::PatchArray & patch)
{
CHECK_GL_ERROR("bindProgram begin\n");
// Primitives are triangles for Loop subdivision, quads otherwise
Effect effect = kFill;
EffectDesc effectDesc( patch.GetDescriptor(), effect );
// Build shader
EffectDrawRegistry::ConfigType *
config = g_effectRegistry.GetDrawConfig(effectDesc);
// Install shader
GLuint program = config->program;
glUseProgram(program);
// Update and bind transform state
struct Transform {
float ModelViewMatrix[16];
float ProjectionMatrix[16];
float ModelViewProjectionMatrix[16];
} transformData;
setMatrix(mDrawContext.getMatrix(MHWRender::MDrawContext::kWorldViewMtx),
transformData.ModelViewMatrix);
setMatrix(mDrawContext.getMatrix(MHWRender::MDrawContext::kProjectionMtx),
transformData.ProjectionMatrix);
setMatrix(mDrawContext.getMatrix(MHWRender::MDrawContext::kWorldViewProjMtx),
transformData.ModelViewProjectionMatrix);
if (!g_transformUB) {
glGenBuffers(1, &g_transformUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_transformUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(transformData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_transformUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(transformData), &transformData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER, g_transformBinding, g_transformUB);
// Update and bind tessellation state
struct Tessellation {
float TessLevel;
} tessellationData;
tessellationData.TessLevel = static_cast<float>(1 << _tessFactor);
if (!g_tessellationUB) {
glGenBuffers(1, &g_tessellationUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_tessellationUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(tessellationData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_tessellationUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(tessellationData), &tessellationData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER,
g_tessellationBinding,
g_tessellationUB);
// Update and bind lighting state
int numLights = mDrawContext.numberOfActiveLights();
struct Lighting {
struct Light {
float position[4];
float diffuse[4];
float ambient[4];
float specular[4];
} lightSource[2];
} lightingData;
memset(&lightingData, 0, sizeof(lightingData));
for (int i = 0; i < numLights && i < 2; ++i) {
MFloatPointArray positions;
MFloatVector direction;
float intensity;
MColor color;
bool hasDirection, hasPosition;
mDrawContext.getLightInformation(i, positions, direction, intensity,
color, hasDirection, hasPosition);
MMatrix modelView = mDrawContext.getMatrix(MHWRender::MDrawContext::kWorldViewMtx);
direction = MVector(direction) * modelView;
Lighting::Light &light = lightingData.lightSource[i];
if (hasDirection) {
light.position[0] = -direction[0];
light.position[1] = -direction[1];
light.position[2] = -direction[2];
for (int j = 0; j < 4; ++j) {
light.diffuse[j] = color[j] * intensity;
light.ambient[j] = color[j] * intensity;
light.specular[j] = color[j] * intensity;
}
}
}
if (!g_lightingUB) {
glGenBuffers(1, &g_lightingUB);
glBindBuffer(GL_UNIFORM_BUFFER, g_lightingUB);
glBufferData(GL_UNIFORM_BUFFER,
sizeof(lightingData), NULL, GL_STATIC_DRAW);
};
glBindBuffer(GL_UNIFORM_BUFFER, g_lightingUB);
glBufferSubData(GL_UNIFORM_BUFFER,
0, sizeof(lightingData), &lightingData);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferBase(GL_UNIFORM_BUFFER, g_lightingBinding, g_lightingUB);
// Update other uniforms
float color[4] = { 0, 0, 0, 1 };
_diffuse.get(color);
glProgramUniform4fv(program,
glGetUniformLocation(program, "diffuseColor"),
1, color);
_ambient.get(color);
glProgramUniform4fv(program,
glGetUniformLocation(program, "ambientColor"),
1, color);
_specular.get(color);
glProgramUniform4fv(program,
glGetUniformLocation(program, "specularColor"),
1, color);
glProgramUniform1f(program,
glGetUniformLocation(program, "shininess"),
_shininess);
// Bind diffuse map
if (g_effectRegistry.getDiffuseId()!=0) {
GLint difmap = glGetUniformLocation(program, "diffuseMap");
glProgramUniform1i(program, difmap, DIFF_TEXTURE_UNIT);
}
// Bind all texture buffers
// OpenSubdiv's geometric shading code depends on additional
// 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->GetVertexTextureBuffer()) {
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->GetVertexTextureBuffer());
}
if (osdDrawContext->GetVertexValenceTextureBuffer()) {
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->GetVertexValenceTextureBuffer());
}
if (osdDrawContext->GetQuadOffsetsTextureBuffer()) {
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->GetQuadOffsetsTextureBuffer());
}
if (osdDrawContext->GetPatchParamTextureBuffer()) {
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->GetPatchParamTextureBuffer());
}
if (osdDrawContext->GetFvarDataTextureBuffer()) {
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_BUFFER,
osdDrawContext->GetFvarDataTextureBuffer() );
}
glActiveTexture(GL_TEXTURE0);
CHECK_GL_ERROR("bindProgram leave\n");
return program;
}
PXR_NAMESPACE_OPEN_SCOPE
/* static */
bool
px_vp20Utils::setupLightingGL(const MHWRender::MDrawContext& context)
{
MStatus status;
// Take into account only the 8 lights supported by the basic
// OpenGL profile.
const unsigned int nbLights =
std::min(context.numberOfActiveLights(&status), 8u);
if (status != MStatus::kSuccess) return false;
if (nbLights > 0) {
// Lights are specified in world space and needs to be
// converted to view space.
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
const MMatrix worldToView =
context.getMatrix(MHWRender::MDrawContext::kViewMtx, &status);
if (status != MStatus::kSuccess) return false;
glLoadMatrixd(worldToView.matrix[0]);
glEnable(GL_LIGHTING);
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
glEnable(GL_COLOR_MATERIAL) ;
glEnable(GL_NORMALIZE) ;
{
const GLfloat ambient[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat specular[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambient);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
}
for (unsigned int i=0; i<nbLights; ++i) {
MFloatVector direction;
float intensity;
MColor color;
bool hasDirection;
bool hasPosition;
#if MAYA_API_VERSION >= 201300
// Starting with Maya 2013, getLightInformation() uses MFloatPointArray for positions
MFloatPointArray positions;
status = context.getLightInformation(
i, positions, direction, intensity, color,
hasDirection, hasPosition);
const MFloatPoint &position = positions[0];
#else
// Maya 2012, getLightInformation() uses MFloatPoint for position
MFloatPoint position;
status = context.getLightInformation(
i, position, direction, intensity, color,
hasDirection, hasPosition);
#endif
if (status != MStatus::kSuccess) return false;
if (hasDirection) {
if (hasPosition) {
// Assumes a Maya Spot Light!
const GLfloat ambient[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat diffuse[4] = { intensity * color[0],
intensity * color[1],
intensity * color[2],
1.0f };
const GLfloat pos[4] = { position[0],
position[1],
position[2],
1.0f };
const GLfloat dir[3] = { direction[0],
direction[1],
direction[2]};
glLightfv(GL_LIGHT0+i, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0+i, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0+i, GL_POSITION, pos);
glLightfv(GL_LIGHT0+i, GL_SPOT_DIRECTION, dir);
// Maya's default value's for spot lights.
glLightf(GL_LIGHT0+i, GL_SPOT_EXPONENT, 0.0);
glLightf(GL_LIGHT0+i, GL_SPOT_CUTOFF, 20.0);
}
else {
// Assumes a Maya Directional Light!
const GLfloat ambient[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat diffuse[4] = { intensity * color[0],
intensity * color[1],
intensity * color[2],
1.0f };
const GLfloat pos[4] = { -direction[0],
-direction[1],
-direction[2],
0.0f };
glLightfv(GL_LIGHT0+i, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0+i, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0+i, GL_POSITION, pos);
glLightf(GL_LIGHT0+i, GL_SPOT_CUTOFF, 180.0);
}
}
else if (hasPosition) {
// Assumes a Maya Point Light!
const GLfloat ambient[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat diffuse[4] = { intensity * color[0],
intensity * color[1],
intensity * color[2],
1.0f };
const GLfloat pos[4] = { position[0],
position[1],
position[2],
1.0f };
glLightfv(GL_LIGHT0+i, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0+i, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0+i, GL_POSITION, pos);
glLightf(GL_LIGHT0+i, GL_SPOT_CUTOFF, 180.0);
}
else {
// Assumes a Maya Ambient Light!
const GLfloat ambient[4] = { intensity * color[0],
intensity * color[1],
intensity * color[2],
1.0f };
const GLfloat diffuse[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat pos[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
glLightfv(GL_LIGHT0+i, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0+i, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0+i, GL_POSITION, pos);
glLightf(GL_LIGHT0+i, GL_SPOT_CUTOFF, 180.0);
}
glEnable(GL_LIGHT0+i);
}
glPopMatrix();
}
glDisable(GL_LIGHTING);
return nbLights > 0;
}
/* static */
GlfSimpleLightingContextRefPtr
px_vp20Utils::GetLightingContextFromDrawContext(
const MHWRender::MDrawContext& context)
{
const GfVec4f blackColor(0.0f, 0.0f, 0.0f, 1.0f);
const GfVec4f whiteColor(1.0f, 1.0f, 1.0f, 1.0f);
GlfSimpleLightingContextRefPtr lightingContext =
GlfSimpleLightingContext::New();
MStatus status;
unsigned int numMayaLights =
context.numberOfActiveLights(MHWRender::MDrawContext::kFilteredToLightLimit,
&status);
if (status != MS::kSuccess || numMayaLights < 1) {
return lightingContext;
}
bool viewDirectionAlongNegZ = context.viewDirectionAlongNegZ(&status);
if (status != MS::kSuccess) {
// If we fail to find out the view direction for some reason, assume
// that it's along the negative Z axis (OpenGL).
viewDirectionAlongNegZ = true;
}
GlfSimpleLightVector lights;
for (unsigned int i = 0; i < numMayaLights; ++i) {
MHWRender::MLightParameterInformation* mayaLightParamInfo =
context.getLightParameterInformation(i);
if (!mayaLightParamInfo) {
continue;
}
// Setup some default values before we read the light parameters.
bool lightEnabled = true;
bool lightHasPosition = false;
GfVec4f lightPosition(0.0f, 0.0f, 0.0f, 1.0f);
bool lightHasDirection = false;
GfVec3f lightDirection(0.0f, 0.0f, -1.0f);
if (!viewDirectionAlongNegZ) {
// The convention for DirectX is positive Z.
lightDirection[2] = 1.0f;
}
float lightIntensity = 1.0f;
GfVec4f lightColor = blackColor;
bool lightEmitsDiffuse = true;
bool lightEmitsSpecular = false;
float lightDecayRate = 0.0f;
float lightDropoff = 0.0f;
// The cone angle is 180 degrees by default.
GfVec2f lightCosineConeAngle(-1.0f);
float lightShadowBias = 0.0f;
bool lightShadowOn = false;
bool globalShadowOn = false;
MStringArray paramNames;
mayaLightParamInfo->parameterList(paramNames);
for (unsigned int paramIndex = 0; paramIndex < paramNames.length(); ++paramIndex) {
const MString paramName = paramNames[paramIndex];
const MHWRender::MLightParameterInformation::ParameterType paramType =
mayaLightParamInfo->parameterType(paramName);
const MHWRender::MLightParameterInformation::StockParameterSemantic paramSemantic =
mayaLightParamInfo->parameterSemantic(paramName);
MIntArray intValues;
MFloatArray floatValues;
switch (paramType) {
case MHWRender::MLightParameterInformation::kBoolean:
case MHWRender::MLightParameterInformation::kInteger:
mayaLightParamInfo->getParameter(paramName, intValues);
break;
case MHWRender::MLightParameterInformation::kFloat:
case MHWRender::MLightParameterInformation::kFloat2:
case MHWRender::MLightParameterInformation::kFloat3:
case MHWRender::MLightParameterInformation::kFloat4:
mayaLightParamInfo->getParameter(paramName, floatValues);
break;
default:
// Unsupported paramType.
continue;
break;
}
switch (paramSemantic) {
case MHWRender::MLightParameterInformation::kLightEnabled:
_GetLightingParam(intValues, floatValues, lightEnabled);
break;
case MHWRender::MLightParameterInformation::kWorldPosition:
if (_GetLightingParam(intValues, floatValues, lightPosition)) {
lightHasPosition = true;
}
break;
case MHWRender::MLightParameterInformation::kWorldDirection:
if (_GetLightingParam(intValues, floatValues, lightDirection)) {
lightHasDirection = true;
}
break;
case MHWRender::MLightParameterInformation::kIntensity:
_GetLightingParam(intValues, floatValues, lightIntensity);
break;
case MHWRender::MLightParameterInformation::kColor:
_GetLightingParam(intValues, floatValues, lightColor);
break;
case MHWRender::MLightParameterInformation::kEmitsDiffuse:
_GetLightingParam(intValues, floatValues, lightEmitsDiffuse);
break;
case MHWRender::MLightParameterInformation::kEmitsSpecular:
_GetLightingParam(intValues, floatValues, lightEmitsSpecular);
break;
case MHWRender::MLightParameterInformation::kDecayRate:
_GetLightingParam(intValues, floatValues, lightDecayRate);
break;
case MHWRender::MLightParameterInformation::kDropoff:
_GetLightingParam(intValues, floatValues, lightDropoff);
break;
case MHWRender::MLightParameterInformation::kCosConeAngle:
_GetLightingParam(intValues, floatValues, lightCosineConeAngle);
break;
case MHWRender::MLightParameterInformation::kShadowBias:
_GetLightingParam(intValues, floatValues, lightShadowBias);
break;
case MHWRender::MLightParameterInformation::kShadowOn:
_GetLightingParam(intValues, floatValues, lightShadowOn);
break;
case MHWRender::MLightParameterInformation::kGlobalShadowOn:
_GetLightingParam(intValues, floatValues, globalShadowOn);
break;
default:
// Unsupported paramSemantic.
continue;
break;
}
if (!lightEnabled) {
// Stop reading light parameters if the light is disabled.
break;
}
}
if (!lightEnabled) {
// Skip to the next light if this light is disabled.
continue;
}
lightColor[0] *= lightIntensity;
lightColor[1] *= lightIntensity;
lightColor[2] *= lightIntensity;
// Populate a GlfSimpleLight from the light information from Maya.
GlfSimpleLight light;
GfVec4f lightAmbient = blackColor;
GfVec4f lightDiffuse = blackColor;
GfVec4f lightSpecular = blackColor;
// We receive the cone angle from Maya as a pair of floats which
// includes the penumbra, but GlfSimpleLights don't currently support
// that, so we only use the primary cone angle value.
float lightCutoff = GfRadiansToDegrees(std::acos(lightCosineConeAngle[0]));
float lightFalloff = lightDropoff;
// decayRate is actually an enum in Maya that we receive as a float:
// - 0.0 = no attenuation
// - 1.0 = linear attenuation
// - 2.0 = quadratic attenuation
// - 3.0 = cubic attenuation (not supported by GlfSimpleLight)
GfVec3f lightAttenuation(0.0f);
if (lightDecayRate > 1.5) {
// Quadratic attenuation.
lightAttenuation[2] = 1.0f;
} else if (lightDecayRate > 0.5f) {
// Linear attenuation.
lightAttenuation[1] = 1.0f;
} else {
// No/constant attenuation.
lightAttenuation[0] = 1.0f;
}
if (lightHasDirection && !lightHasPosition) {
// This is a directional light. Set the direction as its position.
lightPosition[0] = -lightDirection[0];
lightPosition[1] = -lightDirection[1];
lightPosition[2] = -lightDirection[2];
lightPosition[3] = 0.0f;
// Revert direction to the default value.
lightDirection = GfVec3f(0.0f, 0.0f, -1.0f);
if (!viewDirectionAlongNegZ) {
lightDirection[2] = 1.0f;
}
}
if (!lightHasPosition && !lightHasDirection) {
// This is an ambient light.
lightAmbient = lightColor;
} else {
if (lightEmitsDiffuse) {
lightDiffuse = lightColor;
}
if (lightEmitsSpecular) {
// XXX: It seems that the specular color cannot be specified
// separately from the diffuse color on Maya lights.
lightSpecular = lightColor;
}
}
light.SetAmbient(lightAmbient);
light.SetDiffuse(lightDiffuse);
light.SetSpecular(lightSpecular);
light.SetPosition(lightPosition);
light.SetSpotDirection(lightDirection);
light.SetSpotCutoff(lightCutoff);
light.SetSpotFalloff(lightFalloff);
light.SetAttenuation(lightAttenuation);
light.SetShadowBias(lightShadowBias);
light.SetHasShadow(lightShadowOn && globalShadowOn);
lights.push_back(light);
}
lightingContext->SetLights(lights);
// XXX: These material settings match what we used to get when we read the
// material from OpenGL. This should probably eventually be something more
// sophisticated.
GlfSimpleMaterial material;
material.SetAmbient(whiteColor);
material.SetDiffuse(whiteColor);
material.SetSpecular(blackColor);
material.SetEmission(blackColor);
material.SetShininess(0.0001f);
lightingContext->SetMaterial(material);
lightingContext->SetSceneAmbient(blackColor);
return lightingContext;
}
/* static */
void
px_vp20Utils::unsetLightingGL(const MHWRender::MDrawContext& context)
{
MStatus status;
// Take into account only the 8 lights supported by the basic
// OpenGL profile.
const unsigned int nbLights =
std::min(context.numberOfActiveLights(&status), 8u);
if (status != MStatus::kSuccess) return;
// Restore OpenGL default values for anything that we have
// modified.
if (nbLights > 0) {
for (unsigned int i=0; i<nbLights; ++i) {
glDisable(GL_LIGHT0+i);
const GLfloat ambient[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
glLightfv(GL_LIGHT0+i, GL_AMBIENT, ambient);
if (i==0) {
const GLfloat diffuse[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
glLightfv(GL_LIGHT0+i, GL_DIFFUSE, diffuse);
const GLfloat spec[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
glLightfv(GL_LIGHT0+i, GL_SPECULAR, spec);
}
else {
const GLfloat diffuse[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
glLightfv(GL_LIGHT0+i, GL_DIFFUSE, diffuse);
const GLfloat spec[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
glLightfv(GL_LIGHT0+i, GL_SPECULAR, spec);
}
const GLfloat pos[4] = { 0.0f, 0.0f, 1.0f, 0.0f };
glLightfv(GL_LIGHT0+i, GL_POSITION, pos);
const GLfloat dir[3] = { 0.0f, 0.0f, -1.0f };
glLightfv(GL_LIGHT0+i, GL_SPOT_DIRECTION, dir);
glLightf(GL_LIGHT0+i, GL_SPOT_EXPONENT, 0.0);
glLightf(GL_LIGHT0+i, GL_SPOT_CUTOFF, 180.0);
}
glDisable(GL_LIGHTING);
glDisable(GL_COLOR_MATERIAL) ;
glDisable(GL_NORMALIZE) ;
const GLfloat ambient[4] = { 0.2f, 0.2f, 0.2f, 1.0f };
const GLfloat specular[4] = { 0.8f, 0.8f, 0.8f, 1.0f };
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambient);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 0);
}
}