mirror of
https://github.com/OpenSpace/OpenSpace.git
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300 lines
11 KiB
C++
300 lines
11 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#include <openspace/rendering/renderablefieldlines.h>
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#include <openspace/engine/openspaceengine.h>
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#include <openspace/util/powerscaledcoordinate.h>
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#include <openspace/util/kameleonwrapper.h>
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#include <openspace/util/constants.h>
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#include <ghoul/opengl/texturereader.h>
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#include <ghoul/opengl/textureunit.h>
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#include <ghoul/opengl/texture.h>
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namespace {
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const std::string _loggerCat = "RenderableFieldlines";
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const std::string keyFieldlines = "Fieldlines";
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const std::string keyFilename = "File";
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const std::string keyHints = "Hints";
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}
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namespace openspace {
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RenderableFieldlines::RenderableFieldlines(const ghoul::Dictionary& dictionary)
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: Renderable(dictionary)
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, _fieldlineVAO(0)
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, _shader(nullptr)
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, _texture(nullptr)
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{
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std::string name;
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bool success = dictionary.getValue(constants::scenegraphnode::keyName, name);
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assert(success);
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ghoul::Dictionary fieldlines;
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success = dictionary.getValue(keyFieldlines, fieldlines);
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if (!success) {
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LERROR("RenderableFieldlines '" << name << "' did not contain a '" <<
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keyFieldlines << "' key");
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return;
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}
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for (const std::string& key : fieldlines.keys()) {
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ghoul::Dictionary fieldline;
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success = fieldlines.getValue(key, fieldline);
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if (!success) {
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LERROR("Key '" << key << "' in '" << keyFieldlines <<
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"' of the RenderableFieldlines '" << name <<
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"' does not have a table as value");
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continue;
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}
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std::string fileName;
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fieldline.getValue(keyFilename, fileName);
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fileName = findPath(fileName);
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if (fileName.empty())
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LERROR("File not found!");
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else {
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ghoul::Dictionary hintsDictionary;
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fieldline.getValue(keyHints, hintsDictionary);
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_filenames.push_back(fileName);
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_hintsDictionaries.push_back(hintsDictionary);
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}
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}
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setBoundingSphere(PowerScaledScalar::CreatePSS(250.f*6371000.f)); // FIXME a non-magic number perhaps
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}
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RenderableFieldlines::~RenderableFieldlines() {
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}
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bool RenderableFieldlines::initialize() {
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assert(_filenames.size() != 0);
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assert(_hintsDictionaries.size() != 0);
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int prevEnd = 0;
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std::vector<LinePoint> vertexData, seedPointsData;
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std::vector<std::vector<LinePoint> > fieldlinesData;
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glm::vec4 seedPointsColor = glm::vec4(1.0, 0.5, 0.0, 1.0);
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for (int i = 0; i < _filenames.size(); ++i) {
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fieldlinesData = getFieldlinesData(_filenames[i], _hintsDictionaries[i]);
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for (int j = 0; j < fieldlinesData.size(); ++j) {
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_lineStart.push_back(prevEnd);
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_lineCount.push_back(fieldlinesData[j].size());
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prevEnd = prevEnd + fieldlinesData[j].size();
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vertexData.insert( vertexData.end(), fieldlinesData[j].begin(), fieldlinesData[j].end());
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}
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// Give seedpoints a color for visualizing as GL_POINTS
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for (glm::vec3 seedPoint : _seedPoints) {
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seedPointsData.push_back(LinePoint(seedPoint, seedPointsColor));
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}
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}
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LDEBUG("Number of vertices : " << vertexData.size());
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// ------ FIELDLINES -----------------
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GLuint vertexPositionBuffer;
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glGenVertexArrays(1, &_fieldlineVAO); // generate array
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glBindVertexArray(_fieldlineVAO); // bind array
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glGenBuffers(1, &vertexPositionBuffer); // generate buffer
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glBindBuffer(GL_ARRAY_BUFFER, vertexPositionBuffer); // bind buffer
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glBufferData(GL_ARRAY_BUFFER, vertexData.size()*sizeof(LinePoint), &vertexData.front(), GL_STATIC_DRAW);
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// Vertex positions
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GLuint vertexLocation = 0;
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glEnableVertexAttribArray(vertexLocation);
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glVertexAttribPointer(vertexLocation, 3, GL_FLOAT, GL_FALSE, sizeof(LinePoint), reinterpret_cast<void*>(0));
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// Vertex colors
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GLuint colorLocation = 1;
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glEnableVertexAttribArray(colorLocation);
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glVertexAttribPointer(colorLocation, 4, GL_FLOAT, GL_FALSE, sizeof(LinePoint), (void*)(sizeof(glm::vec3)));
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glBindBuffer(GL_ARRAY_BUFFER, 0); //unbind buffer
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glBindVertexArray(0); //unbind array
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// ------ SEEDPOINTS -----------------
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GLuint seedpointPositionBuffer;
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glGenVertexArrays(1, &_seedpointVAO); // generate array
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glBindVertexArray(_seedpointVAO); // bind array
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glGenBuffers(1, &seedpointPositionBuffer); // generate buffer
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glBindBuffer(GL_ARRAY_BUFFER, seedpointPositionBuffer); // bind buffer
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glBufferData(GL_ARRAY_BUFFER, seedPointsData.size()*sizeof(LinePoint), &seedPointsData.front(), GL_STATIC_DRAW);
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// Vertex positions
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glEnableVertexAttribArray(vertexLocation);
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glVertexAttribPointer(vertexLocation, 3, GL_FLOAT, GL_FALSE, sizeof(LinePoint), reinterpret_cast<void*>(0));
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// Vertex colors
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glEnableVertexAttribArray(colorLocation);
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glVertexAttribPointer(colorLocation, 4, GL_FLOAT, GL_FALSE, sizeof(LinePoint), (void*)(sizeof(glm::vec3)));
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glBindBuffer(GL_ARRAY_BUFFER, 0); //unbind buffer
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glBindVertexArray(0); //unbind array
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OsEng.ref().configurationManager().getValue("FieldlineProgram", _shader);
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assert(_shader);
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loadTexture("C:/openspace/openspace-data/test.png");
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return true;
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}
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bool RenderableFieldlines::deinitialize() {
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return true;
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}
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void RenderableFieldlines::render(const RenderData& data) {
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if (!_shader)
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return;
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_shader->activate();
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_shader->setUniform("modelViewProjection", data.camera.viewProjectionMatrix());
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_shader->setUniform("modelTransform", glm::mat4(1.0));
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_shader->setUniform("cameraViewDir", data.camera.viewDirection());
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setPscUniforms(_shader, &data.camera, data.position);
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ghoul::opengl::TextureUnit unit;
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unit.activate();
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_texture->bind();
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_shader->setUniform("texture1", unit);
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// ------ DRAW FIELDLINES -----------------
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glEnable(GL_POLYGON_SMOOTH);
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glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST);
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glBindVertexArray(_fieldlineVAO);
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glMultiDrawArrays(GL_LINE_STRIP_ADJACENCY, &_lineStart[0], &_lineCount[0], _lineStart.size());
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//// ------ DRAW SEEDPOINTS -----------------
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//glBindVertexArray(_seedpointVAO);
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//glMultiDrawArrays(GL_LINE_STRIP_ADJACENCY, &_lineStart[0], &_lineCount[0], _seedPoints.size());
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glDisable(GL_POLYGON_SMOOTH);
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glBindVertexArray(0);
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_shader->deactivate();
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}
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std::vector<std::vector<LinePoint> > RenderableFieldlines::getFieldlinesData(std::string filename, ghoul::Dictionary hintsDictionary) {
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std::string modelString;
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float stepSize = 0.5; // default if no stepsize is specified in hints
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std::string xVariable, yVariable, zVariable;
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KameleonWrapper::Model model;
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std::vector<std::vector<LinePoint> > fieldlinesData;
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bool classification = false, lorentz = false;
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glm::vec4 fieldlineColor = glm::vec4(1.0, 1.0, 1.0, 1.0); // default color if no color or classification is specified
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if (hintsDictionary.hasKey("Model") && hintsDictionary.getValue("Model", modelString)) {
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// ------ MODEL -----------------
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if (modelString == "BATSRUS") {
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model = KameleonWrapper::Model::BATSRUS;
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} else if (modelString == "ENLIL") {
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LWARNING("ENLIL model not supported for fieldlines");
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return fieldlinesData;
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} else {
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LWARNING("Hints does not specify a valid 'Model'");
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return fieldlinesData;
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}
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// ------ VARIBLES / LORENTZ -----------------
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if (hintsDictionary.hasKey("Variables")) {
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bool xVar, yVar, zVar;
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xVar = hintsDictionary.getValue("Variables.1", xVariable);
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if (xVar && xVariable == "Lorentz") {
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lorentz = true;
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} else {
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yVar = hintsDictionary.getValue("Variables.2", yVariable);
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zVar = hintsDictionary.getValue("Variables.3", zVariable);
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if (!xVar || !yVar || !zVar) {
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LWARNING("Error reading variables! Must be 3 and must exist in CDF data");
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return fieldlinesData;
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}
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}
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} else {
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LWARNING("Hints does not specify valid 'Variables'");
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return fieldlinesData;
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}
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// ------ STEPSIZE -----------------
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if (!hintsDictionary.hasKey("Stepsize") || !hintsDictionary.getValue("Stepsize", stepSize)) {
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LDEBUG("No stepsize set for fieldlines. Setting to default value (" << stepSize << ")");
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}
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// ------ SEEDPOINTS ---------------
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ghoul::Dictionary seedpointsDictionary;
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_seedPoints.clear();
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if (hintsDictionary.hasKey("Seedpoints") && hintsDictionary.getValue("Seedpoints", seedpointsDictionary)) {
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glm::vec3 seedPos;
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for (auto index : seedpointsDictionary.keys()) {
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hintsDictionary.getValue("Seedpoints."+index, seedPos);
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_seedPoints.push_back(seedPos);
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}
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}
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// ------ CLASSIFICATION & COLOR -----------
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hintsDictionary.getValue("Color", fieldlineColor);
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hintsDictionary.getValue("Classification", classification);
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} else {
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// model unitialized!
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assert(false);
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}
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KameleonWrapper kw(filename);
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if (lorentz) {
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fieldlinesData = kw.getLorentzTrajectories(_seedPoints, fieldlineColor, stepSize);
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} else {
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if (classification)
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fieldlinesData = kw.getClassifiedFieldLines(xVariable, yVariable, zVariable, _seedPoints, stepSize);
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else
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fieldlinesData = kw.getFieldLines(xVariable, yVariable, zVariable, _seedPoints, stepSize, fieldlineColor);
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}
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return fieldlinesData;
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}
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// TEST
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void RenderableFieldlines::loadTexture(std::string path) {
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if (path != "") {
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ghoul::opengl::Texture* texture = ghoul::opengl::loadTexture(path);
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if (texture) {
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LDEBUG("Loaded texture from '" << path << "'");
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texture->uploadTexture();
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// Textures of planets looks much smoother with AnisotropicMipMap rather than linear
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texture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
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if (_texture)
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delete _texture;
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_texture = texture;
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}
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}
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}
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} // namespace openspace
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