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Commit 497f1a62 authored by Christian Schulte zu Berge's avatar Christian Schulte zu Berge
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Finished proof-of-concept implementation of ParticleFlowRenderer 

Updated VectorFieldDemo pipeline to allow the user to choose between arrow- and particle visualization.
parent a96267bc
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modules/vectorfield/glsl/particleflowrenderer.frag
View file @ 497f1a62
......@@ -23,14 +23,41 @@
// ================================================================================================
#include "tools/shading.frag"
#include "tools/transferfunction.frag"
in vec3 ex_Velocity;
in float ex_Transparency;
out vec4 out_Color; ///< outgoing fragment color
uniform sampler1D _transferFunction;
uniform TFParameters1D _transferFunctionParams;
uniform int _coloringMode;
uniform float _scale;
uniform vec2 _threshold;
void main() {
out_Color = vec4(1.0, 0.5, 0.0, 1.0) * ex_Transparency;
if (length(gl_PointCoord - vec2(0.5)) > 0.5) {
discard;
}
switch (_coloringMode) {
case 0: // age
out_Color = lookupTF(_transferFunction, _transferFunctionParams, ex_Transparency);
break;
case 1: // velocity
float f = length(ex_Velocity);
f -= _threshold.x;
f /= (_threshold.y - _threshold.x);
f *= _scale;
out_Color = lookupTF(_transferFunction, _transferFunctionParams, f);
break;
case 2: // direction
out_Color = vec4(normalize(abs(ex_Velocity)), 1.0);
break;
default:
discard;
}
#ifdef ENABLE_SHADING___
// compute gradient (needed for shading and normals)
......
modules/vectorfield/glsl/particleflowrenderer.vert
View file @ 497f1a62
......@@ -64,6 +64,7 @@ uniform float _time;
uniform float _frameLength;
uniform float _lifetime;
uniform float _scale;
uniform vec2 _threshold;
uniform sampler3D _volume;
uniform TextureParameters3D _volumeTextureParams;
......@@ -73,7 +74,7 @@ subroutine (RenderPassType)
void update() {
if (_time > in_StartTime) {
float age = _time - in_StartTime;
if (age > _lifetime || length(in_Velocity) < 10.0) {
if (age > _lifetime || length(in_Velocity) < _threshold.x || length(in_Velocity) > _threshold.y) {
// particle expired, recycle
ex_Position = in_InitialPosition;
ex_Velocity = texture(_volume, (ex_Position / _volumeTextureParams._size).xyz).xyz;
......
modules/vectorfield/pipelines/vectorfielddemo.cpp
View file @ 497f1a62
......@@ -28,9 +28,15 @@
#include "core/classification/geometry1dtransferfunction.h"
#include "core/classification/tfgeometry1d.h"
#include "core/datastructures/imagedata.h"
namespace campvis {
static const GenericOption<std::string> viewSelectionOptions[2] = {
GenericOption<std::string>("arrows", "Arrows"),
GenericOption<std::string>("particles", "Particle Simulation"),
};
VectorFieldDemo::VectorFieldDemo(DataContainer* dc)
: AutoEvaluationPipeline(dc)
, _lsp()
......@@ -42,11 +48,15 @@ namespace campvis {
, _rtc(&_canvasSize)
, p_camera("Camera", "Camera", tgt::Camera())
, p_sliceNumber("SliceNuber", "Slice Number", 0, 0, 1024)
, p_viewSelection("ViewSelection", "Select 3D View", viewSelectionOptions, 2)
, p_time("Time", "Time", 0, 0, 100)
, _trackballEH(0)
{
addProperty(p_camera);
addProperty(p_sliceNumber);
addProperty(p_viewSelection);
addProperty(p_time);
_trackballEH = new TrackballNavigationEventListener(&p_camera, &_canvasSize);
addEventListenerToBack(_trackballEH);
......@@ -84,7 +94,7 @@ namespace campvis {
_vectorFieldReader.p_targetImageID.addSharedProperty(&_pfr.p_inputVectors);
_vectorFieldReader.p_targetImageID.addSharedProperty(&_vectorFieldRenderer.p_inputVectors);
_vectorFieldRenderer.p_renderOutput.addSharedProperty(&_rtc.p_firstImageId);
_vectorFieldRenderer.p_renderOutput.setValue("arrows");
_vectorFieldRenderer.p_arrowSize.setValue(0.03f);
_vectorFieldRenderer.p_lenThresholdMin.setValue(100.f);
_vectorFieldRenderer.p_flowProfile1.setValue(0.4716088614374652f);
......@@ -101,26 +111,46 @@ namespace campvis {
_pfr.p_flowProfile4.setValue(0.1019371804834016f);
_pfr.p_lenThresholdMax.setValue(400.f);
_pfr.p_renderOutput.setValue("particles");
_pfr.setEnabled(false);
Geometry1DTransferFunction* tf = new Geometry1DTransferFunction(128, tgt::vec2(0.f, 1.f));
tf->addGeometry(TFGeometry1D::createQuad(tgt::vec2(0.f, 1.f), tgt::col4(0, 0, 0, 255), tgt::col4(255, 255, 255, 255)));
_sliceRenderer.p_transferFunction.replaceTF(tf);
_sliceRenderer.p_targetImageID.setValue("slice");
//_sliceRenderer.p_targetImageID.addSharedProperty(&_rtc.p_secondImageId);
_rtc.p_secondImageId.setValue("particles");
_rtc.p_firstImageId.setValue("arrows");
_rtc.p_secondImageId.setValue("slice");
_rtc.p_compositingMethod.selectById("depth");
_rtc.p_targetImageId.setValue("composed");
_renderTargetID.setValue("composed");
p_time.addSharedProperty(&_vectorFieldRenderer.p_Time);
p_time.addSharedProperty(&_pfr.p_Time);
}
void VectorFieldDemo::onProcessorValidated(AbstractProcessor* processor) {
if (processor == &_imageReader) {
// update camera
ScopedTypedData<IHasWorldBounds> img(*_data, _sliceRenderer.p_sourceImageID.getValue());
ScopedTypedData<ImageData> img(*_data, _sliceRenderer.p_sourceImageID.getValue());
if (img) {
_trackballEH->reinitializeCamera(img);
p_sliceNumber.setMaxValue(static_cast<int>(img->getSize().z));
}
}
}
void VectorFieldDemo::onPropertyChanged(const AbstractProperty* prop) {
if (prop == &p_viewSelection) {
if (p_viewSelection.getOptionValue() == "arrows") {
_rtc.p_firstImageId.setValue("arrows");
_vectorFieldRenderer.setEnabled(true);
_pfr.setEnabled(false);
}
else if (p_viewSelection.getOptionValue() == "particles") {
_rtc.p_firstImageId.setValue("particles");
_vectorFieldRenderer.setEnabled(false);
_pfr.setEnabled(true);
}
}
}
......
modules/vectorfield/pipelines/vectorfielddemo.h
View file @ 497f1a62
......@@ -66,6 +66,9 @@ namespace campvis {
*/
virtual void onProcessorValidated(AbstractProcessor* processor);
/// \see HasPropertyCollection::onPropertyChanged
virtual void onPropertyChanged(const AbstractProperty* prop);
LightSourceProvider _lsp;
MhdImageReader _imageReader;
MhdImageReader _vectorFieldReader;
......@@ -76,6 +79,9 @@ namespace campvis {
CameraProperty p_camera;
IntProperty p_sliceNumber;
GenericOptionProperty<std::string> p_viewSelection;
IntProperty p_time;
TrackballNavigationEventListener* _trackballEH;
};
......
modules/vectorfield/processors/particleflowrenderer.cpp
View file @ 497f1a62
......@@ -31,6 +31,9 @@
#include "tgt/textureunit.h"
#include "tgt/vertexarrayobject.h"
#include "core/classification/geometry1dtransferfunction.h"
#include "core/classification/tfgeometry1d.h"
#include "core/datastructures/imagedata.h"
#include "core/datastructures/imagerepresentationgl.h"
#include "core/datastructures/lightsourcedata.h"
......@@ -40,28 +43,34 @@
namespace campvis {
static const GenericOption<ParticleFlowRenderer::ColoringMode> coloringModeOptions[3] = {
GenericOption<ParticleFlowRenderer::ColoringMode>("age", "Coloring by Age", ParticleFlowRenderer::COLORING_AGE),
GenericOption<ParticleFlowRenderer::ColoringMode>("velocity", "Coloring by Velocity", ParticleFlowRenderer::COLORING_VELOCITY),
GenericOption<ParticleFlowRenderer::ColoringMode>("direction", "Coloring by Direction", ParticleFlowRenderer::COLORING_DIRECTION)
};
const std::string ParticleFlowRenderer::loggerCat_ = "CAMPVis.modules.classification.ParticleFlowRenderer";
ParticleFlowRenderer::ParticleFlowRenderer(IVec2Property* viewportSizeProp)
: VisualizationProcessor(viewportSizeProp)
, p_resetButton("ResetButton", "Reset")
, p_stepButton("StepButton", "Step")
, p_stepInt("StepInt", "Step", 0, 0, 10)
, p_inputVectors("InputImage", "Input Image Vectors", "vectors", DataNameProperty::READ)
, p_renderOutput("RenderOutput", "Output Image", "ParticleFlowRenderer.output", DataNameProperty::WRITE)
, p_arrowSize("ArrowSize", "Arrow Size", 1.f, .001f, 5.f)
, p_lenThresholdMin("LenThresholdMin", "Length Threshold Min", .001f, 0.f, 1000.f, 0.005f)
, p_lenThresholdMax("LenThresholdMax", "Length Threshold Max", 10.f, 0.f, 10000.f, 10.f)
, p_numParticles("NumParticles", "Number of Particles", 2048, 32, 65536)
, p_lifetime("Lifetime", "Particle Lifetime", 10.f, 1.f, 100.f, 1.f, 1)
, p_flowProfile1("FlowSpline1", "Flow Profile - Spline 1", 1.f, .0f, 2.f)
, p_flowProfile2("FlowSpline2", "Flow Profile - Spline 2", 1.f, .0f, 2.f)
, p_flowProfile3("FlowSpline3", "Flow Profile - Spline 3", 1.f, .0f, 2.f)
, p_flowProfile4("FlowSpline4", "Flow Profile - Spline 4", 1.f, .0f, 2.f)
, p_Time("time", "Time", 0, 0, 100)
, p_pointSize("PointSize", "Point Size", 4, 1, 16)
, p_coloring("Coloring", "Color Scheme", coloringModeOptions, 3)
, p_transferFunction("TransferFunction", "Coloring Transfer Function", new Geometry1DTransferFunction(256))
, p_enableShading("EnableShading", "Enable Shading", true)
, p_lightId("LightId", "Input Light Source", "lightsource", DataNameProperty::READ)
, p_camera("Camera", "Camera", tgt::Camera())
, p_sliceNumber("SliceNumber", "Slice Number", 0, 0, 0)
, _arrowGeometry(nullptr)
, _shader(nullptr)
, _positionBufferA(nullptr)
, _positionBufferB(nullptr)
......@@ -74,24 +83,29 @@ namespace campvis {
, _vaoB(nullptr)
{
addProperty(p_resetButton, INVALID_PROPERTIES);
addProperty(p_stepButton, INVALID_RESULT | FIRST_FREE_TO_USE_INVALIDATION_LEVEL);
addProperty(p_stepInt, INVALID_RESULT | FIRST_FREE_TO_USE_INVALIDATION_LEVEL);
addProperty(p_Time, INVALID_RESULT | FIRST_FREE_TO_USE_INVALIDATION_LEVEL);
addProperty(p_inputVectors, INVALID_RESULT | INVALID_PROPERTIES);
addProperty(p_renderOutput);
addProperty(p_arrowSize);
addProperty(p_lenThresholdMin);
addProperty(p_lenThresholdMax);
addProperty(p_numParticles);
addProperty(p_lifetime);
addProperty(p_camera);
addProperty(p_sliceNumber);
addProperty(p_Time, INVALID_RESULT | FIRST_FREE_TO_USE_INVALIDATION_LEVEL);
addProperty(p_flowProfile1);
addProperty(p_flowProfile2);
addProperty(p_flowProfile3);
addProperty(p_flowProfile4);
addProperty(p_pointSize);
addProperty(p_coloring);
addProperty(p_transferFunction);
addProperty(p_enableShading, INVALID_RESULT | INVALID_PROPERTIES | INVALID_SHADER);
addProperty(p_lightId);
static_cast<Geometry1DTransferFunction*>(p_transferFunction.getTF())->addGeometry(TFGeometry1D::createHeatedBodyColorMap());
}
ParticleFlowRenderer::~ParticleFlowRenderer() {
......@@ -107,16 +121,11 @@ namespace campvis {
_shader->linkProgram();
tgtAssert(_shader->isLinked(), "Shader not linked!");
LGL_ERROR;
_arrowGeometry = GeometryDataFactory::createArrow(12, 0.35f, 0.05f, 0.09f);
}
void ParticleFlowRenderer::deinit() {
ShdrMgr.dispose(_shader);
delete _arrowGeometry;
_arrowGeometry = 0;
delete _positionBufferA;
delete _positionBufferB;
delete _velocityBufferA;
......@@ -125,6 +134,9 @@ namespace campvis {
delete _startTimeBufferB;
delete _initialPositionBuffer;
delete _vaoA;
delete _vaoB;
VisualizationProcessor::deinit();
}
......@@ -136,16 +148,12 @@ namespace campvis {
return;
}
//GenericImageRepresentationLocal<float, 3>::ScopedRepresentation vectors(dataContainer, p_inputVectors.getValue());
ImageRepresentationGL::ScopedRepresentation vectors(dataContainer, p_inputVectors.getValue());
if (vectors) {
ScopedTypedData<LightSourceData> light(dataContainer, p_lightId.getValue());
if (p_enableShading.getValue() == false || light != nullptr) {
const tgt::Camera& cam = p_camera.getValue();
const tgt::svec3& imgSize = vectors->getSize();
const int sliceNumber = p_sliceNumber.getValue();
float scale = getTemporalFlowScaling((float)p_Time.getValue() / 100.f,
p_flowProfile1.getValue(),
......@@ -160,6 +168,7 @@ namespace campvis {
_shader->setUniform("_viewMatrix", cam.getViewMatrix());
_shader->setUniform("_modelMatrix", vectors->getParent()->getMappingInformation().getVoxelToWorldMatrix());
_shader->setUniform("_scale", scale);
_shader->setUniform("_threshold", tgt::vec2(p_lenThresholdMin.getValue(), p_lenThresholdMax.getValue()));
if (p_enableShading.getValue() && light != nullptr) {
light->bind(_shader, "_lightSource");
......@@ -170,9 +179,7 @@ namespace campvis {
_shader->selectSubroutine(tgt::ShaderObject::VERTEX_SHADER, "update");
_shader->setUniform("_time", _currentTime);
_shader->setUniform("_frameLength", frameLength);
_shader->setUniform("_lifetime", 10.f);
LINFO(_currentTime);
_shader->setUniform("_lifetime", p_lifetime.getValue());
tgt::TextureUnit flowUnit;
vectors->bind(_shader, flowUnit, "_volume", "_volumeTextureParams");
......@@ -200,12 +207,17 @@ namespace campvis {
createAndAttachDepthTexture();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
tgt::TextureUnit tfUnit;
_shader->selectSubroutine(tgt::ShaderObject::VERTEX_SHADER, "render");
_shader->setUniform("_coloringMode", p_coloring.getValue());
p_transferFunction.getTF()->bind(_shader, tfUnit);
glEnable(GL_POINT_SPRITE);
glBindVertexArray((_drawBuffer == 1) ? _vaoA->getId() : _vaoB->getId());
glPointSize(4.f);
//glDrawTransformFeedback(GL_POINTS, _feedback[1-_drawBuffer]);
glPointSize(static_cast<GLfloat>(p_pointSize.getValue()));
glDrawArrays(GL_POINTS, 0, _numParticles);
glPointSize(1.f);
glDisable(GL_POINT_SPRITE);
_shader->deactivate();
glDisable(GL_DEPTH_TEST);
......@@ -226,7 +238,6 @@ namespace campvis {
p_lightId.setVisible(p_enableShading.getValue());
GenericImageRepresentationLocal<float, 3>::ScopedRepresentation vectors(dataContainer, p_inputVectors.getValue());
if (vectors) {
// initialize buffers etc.
initializeTransformFeedbackBuffers(vectors);
......@@ -249,52 +260,6 @@ namespace campvis {
return toReturn;
}
void ParticleFlowRenderer::renderVectorArrow(const GenericImageRepresentationLocal<float, 3>* vectors, const tgt::vec3& position, float scale) {
// avoid overflows
if(position.x >= vectors->getSize().x || position.x < 0 ||
position.y >= vectors->getSize().y || position.y < 0 ||
position.z >= vectors->getSize().z || position.z < 0)
return;
// gather vector direction
const tgt::vec3& dir = vectors->getElement(position);
float len = tgt::length(dir);
// threshold
if(len < p_lenThresholdMin.getValue() || len > p_lenThresholdMax.getValue())
return;
tgt::vec3 up(0.f, 0.f, 1.f);
tgt::vec3 dirNorm = tgt::normalize(dir);
tgt::vec3 axis = tgt::cross(up, dirNorm);
float dotPr = tgt::dot(up, dirNorm);
tgt::mat4 rotationMatrix;
if(abs(dotPr-1)<1.e-3f)
rotationMatrix = tgt::mat4::identity;
else if(abs(dotPr+1)<1.e-3f)
rotationMatrix = tgt::mat4::createRotation(tgt::PIf, tgt::vec3(1.f, 0.f, 0.f));
else {
rotationMatrix = tgt::mat4::createRotation(acos(dotPr), tgt::normalize(axis));
}
const tgt::mat4& voxelToWorldMatrix = vectors->getParent()->getMappingInformation().getVoxelToWorldMatrix();
// compute model matrix
tgt::mat4 modelMatrix = voxelToWorldMatrix * tgt::mat4::createTranslation(position) * rotationMatrix *
tgt::mat4::createScale(tgt::vec3(len * p_arrowSize.getValue())) * tgt::mat4::createScale(tgt::vec3(scale));
// setup shader
//_shader->setUniform("_color", tgt::vec4(dirNorm, 1.f));
float color = (len - p_lenThresholdMin.getValue()) / (p_lenThresholdMax.getValue() - p_lenThresholdMin.getValue());
_shader->setUniform("_color", tgt::vec4(1.f, 1-color, 1-color, 1.f));
// render single ellipsoid
_shader->setUniform("_modelMatrix", modelMatrix);
_arrowGeometry->render(GL_TRIANGLE_STRIP);
}
float ParticleFlowRenderer::getTemporalFlowScaling(float t, float Ct0, float Ct1, float Ct2, float Ct3)
{
const float halfPeriod = 0.5f;
......@@ -350,24 +315,32 @@ namespace campvis {
delete _vaoA;
delete _vaoB;
_initialPositionBuffer = nullptr;
LINFO("Starting generating particles, this may take a while...");
std::vector<tgt::vec3> initialPositions;
std::vector<tgt::vec3> initialVelocities;
std::vector<float> startTimes;
tgt::vec3 imageSize = vectors->getSize();
_numParticles = 2048;
_numParticles = static_cast<GLuint>(p_numParticles.getValue());
for (GLuint i = 0; i < _numParticles; ++i) {
tgt::vec3 position, velocity;
size_t emergencyStopCounter = 0;
do {
position = tgt::vec3(generateRandomFloat(imageSize.x), generateRandomFloat(imageSize.y), generateRandomFloat(imageSize.z));
velocity.x = vectors->getElementNormalizedLinear(position, 0);
velocity.y = vectors->getElementNormalizedLinear(position, 1);
velocity.z = vectors->getElementNormalizedLinear(position, 2);
} while (tgt::length(velocity) < 100.f);
if (++emergencyStopCounter > 10000) {
LERROR("Could not create enough particles that match flow threshold range");
return;
}
} while (tgt::length(velocity) < p_lenThresholdMin.getValue() || tgt::length(velocity) > p_lenThresholdMax.getValue());
float startTime = generateRandomFloat(10.f);
float startTime = generateRandomFloat(p_lifetime.getValue());
initialPositions.push_back(position);
initialVelocities.push_back(velocity);
......@@ -408,30 +381,22 @@ namespace campvis {
glBindTransformFeedback(GL_TRANSFORM_FEEDBACK, 0);
_vaoA = new tgt::VertexArrayObject();
LGL_ERROR;
_vaoA->setVertexAttributePointer(0, _positionBufferA);
LGL_ERROR;
_vaoA->setVertexAttributePointer(1, _velocityBufferA);
LGL_ERROR;
_vaoA->setVertexAttributePointer(2, _startTimeBufferA);
LGL_ERROR;
_vaoA->setVertexAttributePointer(3, _initialPositionBuffer);
LGL_ERROR;
_vaoB = new tgt::VertexArrayObject();
LGL_ERROR;
_vaoB->setVertexAttributePointer(0, _positionBufferB);
LGL_ERROR;
_vaoB->setVertexAttributePointer(1, _velocityBufferB);
LGL_ERROR;
_vaoB->setVertexAttributePointer(2, _startTimeBufferB);
LGL_ERROR;
_vaoB->setVertexAttributePointer(3, _initialPositionBuffer);
LGL_ERROR;
LINFO("Done generating particles, thanks for standing by.");
_currentTime = 0.f;
_drawBuffer = 0;
invalidate(FIRST_FREE_TO_USE_INVALIDATION_LEVEL);
invalidate(INVALID_RESULT | FIRST_FREE_TO_USE_INVALIDATION_LEVEL);
}
float ParticleFlowRenderer::generateRandomFloat(float max /*= 1.f*/) {
......
modules/vectorfield/processors/particleflowrenderer.h
View file @ 497f1a62
......@@ -48,6 +48,12 @@ namespace campvis {
*/
class ParticleFlowRenderer : public VisualizationProcessor {
public:
enum ColoringMode {
COLORING_AGE = 0,
COLORING_VELOCITY = 1,
COLORING_DIRECTION = 2,
};
/**
* Constructs a new ParticleFlowRenderer Processor
**/
......@@ -73,29 +79,30 @@ namespace campvis {
virtual void deinit();
ButtonProperty p_resetButton;
ButtonProperty p_stepButton;
IntProperty p_stepInt;
DataNameProperty p_inputVectors; ///< ID for input vector image
DataNameProperty p_renderOutput; ///< ID for output rendered image
FloatProperty p_arrowSize; ///< Arrow size size
FloatProperty p_lenThresholdMin; ///< Threshold minimum
FloatProperty p_lenThresholdMax; ///< Threshold maximum
IntProperty p_numParticles; ///< Number of particles;
FloatProperty p_lifetime; ///< Particle life time
FloatProperty p_flowProfile1;
FloatProperty p_flowProfile2;
FloatProperty p_flowProfile3;
FloatProperty p_flowProfile4;
IntProperty p_Time;
IntProperty p_pointSize;
GenericOptionProperty<ColoringMode> p_coloring;
TransferFunctionProperty p_transferFunction;
BoolProperty p_enableShading; ///< Flag whether to enable shading
DataNameProperty p_lightId; ///< Name/ID for the LightSource to use
CameraProperty p_camera; ///< camera
IntProperty p_sliceNumber; ///< slice number
protected:
/// \see AbstractProcessor::updateResult
......@@ -111,19 +118,10 @@ namespace campvis {
float getTemporalFlowScaling(float t, float Ct0, float Ct1, float Ct2, float Ct3);
float evaluateCubicBSpline(float t);
/**
* Renders a single vector arrow
* \param vectors Input vector image
* \param position Position to render
*/
void renderVectorArrow(const GenericImageRepresentationLocal<float, 3>* vectors, const tgt::vec3& position, float scale);
void initializeTransformFeedbackBuffers(const GenericImageRepresentationLocal<float, 3>* vectors);
float generateRandomFloat(float max = 1.f);
GeometryData* _arrowGeometry; ///< Geometry for arrow rendering
tgt::Shader* _shader; ///< Shader for arrow rendering
GLuint _feedback[2];
......
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