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280 lines
11 KiB
C++
280 lines
11 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2016 *
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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 <modules/galaxy/rendering/renderablegalaxy.h>
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#include <modules/galaxy/rendering/galaxyraycaster.h>
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#include <ghoul/io/texture/texturereader.h>
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#include <openspace/rendering/renderable.h>
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#include <openspace/engine/openspaceengine.h>
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#include <openspace/rendering/renderengine.h>
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#include <openspace/rendering/raycastermanager.h>
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <ghoul/opengl/ghoul_gl.h>
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#include <modules/volume/rawvolumereader.h>
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#include <ghoul/filesystem/filesystem.h>
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#include <ghoul/opengl/texture.h>
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#include <fstream>
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namespace {
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const std::string GlslRayCastPath = "${MODULES}/toyvolume/shaders/rayCast.glsl";
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const std::string GlslBoundsVsPath = "${MODULES}/toyvolume/shaders/boundsVs.glsl";
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const std::string GlslBoundsFsPath = "${MODULES}/toyvolume/shaders/boundsFs.glsl";
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const std::string _loggerCat = "Renderable Galaxy";
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}
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namespace openspace {
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RenderableGalaxy::RenderableGalaxy(const ghoul::Dictionary& dictionary)
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: Renderable(dictionary)
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, _scalingExponent("scalingExponent", "Scaling Exponent", 1, -10, 20)
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, _stepSize("stepSize", "Step Size", 0.002, 0.001, 0.05)
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, _scaling("scaling", "Scaling", glm::vec3(1.0, 1.0, 1.0), glm::vec3(0.0), glm::vec3(10.0))
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, _translation("translation", "Translation", glm::vec3(0.0, 0.0, 0.0), glm::vec3(0.0), glm::vec3(10.0))
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, _rotation("rotation", "Euler rotation", glm::vec3(0.0, 0.0, 0.0), glm::vec3(0), glm::vec3(6.28)) {
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float scalingExponent, stepSize;
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glm::vec3 scaling, translation, rotation;
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glm::vec4 color;
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ghoul::Dictionary volumeDictionary, pointsDictionary;
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if (dictionary.getValue("ScalingExponent", scalingExponent)) {
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_scalingExponent = scalingExponent;
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}
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if (dictionary.getValue("Scaling", scaling)) {
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_scaling = scaling;
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}
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if (dictionary.getValue("Translation", translation)) {
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_translation = translation;
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}
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if (dictionary.getValue("Rotation", rotation)) {
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_rotation = rotation;
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}
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if (dictionary.getValue("StepSize", stepSize)) {
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_stepSize = stepSize;
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}
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if (dictionary.getValue("Volume", volumeDictionary)) {
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std::string volumeFilename;
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if (volumeDictionary.getValue("Filename", volumeFilename)) {
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_volumeFilename = absPath(volumeFilename);
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} else {
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LERROR("No volume filename specified.");
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}
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glm::vec3 volumeDimensions;
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if (volumeDictionary.getValue("Dimensions", volumeDimensions)) {
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_volumeDimensions = static_cast<glm::ivec3>(volumeDimensions);
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} else {
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LERROR("No volume dimensions specified.");
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}
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} else {
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LERROR("No volume dictionary specified.");
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}
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if (dictionary.getValue("Points", pointsDictionary)) {
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std::string pointsFilename;
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if (pointsDictionary.getValue("Filename", pointsFilename)) {
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_pointsFilename = absPath(pointsFilename);
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} else {
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LERROR("No points filename specified.");
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}
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} else {
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LERROR("No points dictionary specified.");
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}
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}
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RenderableGalaxy::~RenderableGalaxy() {}
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bool RenderableGalaxy::initialize() {
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// Aspect is currently hardcoded to cubic voxels.
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_aspect = static_cast<glm::vec3>(_volumeDimensions);
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_aspect = _aspect / std::max(std::max(_aspect.x, _aspect.y), _aspect.z);
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RawVolumeReader<glm::tvec4<GLfloat>> reader(_volumeFilename, _volumeDimensions);
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_volume = reader.read();
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_texture = std::make_unique<ghoul::opengl::Texture>(
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_volumeDimensions,
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ghoul::opengl::Texture::Format::RGBA,
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GL_RGBA32F,
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GL_FLOAT,
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ghoul::opengl::Texture::FilterMode::Linear,
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ghoul::opengl::Texture::WrappingMode::Clamp);
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_texture->setPixelData(reinterpret_cast<char*>(_volume->data()), ghoul::opengl::Texture::TakeOwnership::No);
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_texture->setDimensions(_volume->dimensions());
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_texture->uploadTexture();
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_raycaster = std::make_unique<GalaxyRaycaster>(*_texture);
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_raycaster->initialize();
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OsEng.renderEngine().raycasterManager().attachRaycaster(*_raycaster.get());
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std::function<void(bool)> onChange = [&](bool enabled) {
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if (enabled) {
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OsEng.renderEngine().raycasterManager().attachRaycaster(*_raycaster.get());
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}
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else {
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OsEng.renderEngine().raycasterManager().detachRaycaster(*_raycaster.get());
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}
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};
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onEnabledChange(onChange);
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addProperty(_scaling);
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addProperty(_scalingExponent);
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addProperty(_stepSize);
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addProperty(_translation);
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addProperty(_rotation);
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// initialize points.
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std::ifstream pointFile(_pointsFilename, std::ios::in);
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std::vector<glm::vec3> pointPositions;
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std::vector<glm::vec3> pointColors;
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std::string format;
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pointFile >> format >> _nPoints;
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// temporarily decrease number of points.
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_nPoints = std::min(static_cast<size_t>(100000), _nPoints);
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float x, y, z, r, g, b, a;
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for (size_t i = 0; i < _nPoints; ++i) {
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pointFile >> x >> y >> z >> r >> g >> b >> a;
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if (pointFile.good()) {
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pointPositions.push_back(glm::vec3(x, y, z));
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pointColors.push_back(glm::vec3(r, g, b));
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}
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else {
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LERROR("Could not read points.");
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break;
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}
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}
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pointFile.close();
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glGenVertexArrays(1, &_pointsVao);
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glGenBuffers(1, &_positionVbo);
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glGenBuffers(1, &_colorVbo);
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glBindVertexArray(_pointsVao);
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glBindBuffer(GL_ARRAY_BUFFER, _positionVbo);
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glBufferData(GL_ARRAY_BUFFER,
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pointPositions.size()*sizeof(glm::vec3),
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pointPositions.data(),
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GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, _colorVbo);
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glBufferData(GL_ARRAY_BUFFER,
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pointColors.size()*sizeof(glm::vec3),
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pointColors.data(),
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GL_STATIC_DRAW);
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RenderEngine& renderEngine = OsEng.renderEngine();
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_pointsProgram = renderEngine.buildRenderProgram("Galaxy points",
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"${MODULE_GALAXY}/shaders/points.vs",
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"${MODULE_GALAXY}/shaders/points.fs");
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GLint positionAttrib = _pointsProgram->attributeLocation("inPosition");
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GLint colorAttrib = _pointsProgram->attributeLocation("inColor");
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glBindBuffer(GL_ARRAY_BUFFER, _positionVbo);
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glEnableVertexAttribArray(positionAttrib);
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glVertexAttribPointer(positionAttrib, 3, GL_FLOAT, GL_FALSE, 0, 0);
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glBindBuffer(GL_ARRAY_BUFFER, _colorVbo);
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glEnableVertexAttribArray(colorAttrib);
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glVertexAttribPointer(colorAttrib, 3, GL_FLOAT, GL_FALSE, 0, 0);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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return true;
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}
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bool RenderableGalaxy::deinitialize() {
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if (_raycaster) {
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OsEng.renderEngine().raycasterManager().detachRaycaster(*_raycaster.get());
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_raycaster = nullptr;
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}
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return true;
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}
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bool RenderableGalaxy::isReady() const {
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return true;
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}
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void RenderableGalaxy::update(const UpdateData& data) {
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if (_raycaster) {
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glm::mat4 transform = glm::translate(glm::mat4(1.0), static_cast<glm::vec3>(_translation) * std::powf(10.0, static_cast<float>(_scalingExponent)));
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glm::vec3 eulerRotation = static_cast<glm::vec3>(_rotation);
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transform = glm::rotate(transform, eulerRotation.x, glm::vec3(1, 0, 0));
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transform = glm::rotate(transform, eulerRotation.y, glm::vec3(0, 1, 0));
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transform = glm::rotate(transform, eulerRotation.z, glm::vec3(0, 0, 1));
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transform = glm::scale(transform, _aspect * static_cast<glm::vec3>(_scaling) * std::powf(10.0, static_cast<float>(_scalingExponent)));
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_raycaster->setStepSize(_stepSize);
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_raycaster->setAspect(_aspect);
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_raycaster->setModelTransform(transform);
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_raycaster->setTime(data.time);
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}
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}
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void RenderableGalaxy::render(const RenderData& data, RendererTasks& tasks) {
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RaycasterTask task{ _raycaster.get(), data };
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tasks.raycasterTasks.push_back(task);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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_pointsProgram->activate();
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setPscUniforms(*_pointsProgram.get(), data.camera, data.position);
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glm::mat4 modelMatrix = glm::mat4(1.0);
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glm::mat4 viewMatrix = data.camera.viewMatrix();
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glm::mat4 projectionMatrix = data.camera.projectionMatrix();
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_pointsProgram->setUniform("model", modelMatrix);
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_pointsProgram->setUniform("view", viewMatrix);
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_pointsProgram->setUniform("projection", projectionMatrix);
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glBindVertexArray(_pointsVao);
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glDepthMask(false);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE);
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glDrawArrays(GL_POINTS, 0, _nPoints);
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glBindVertexArray(0);
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glDepthMask(true);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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}
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