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https://github.com/OpenSpace/OpenSpace.git
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256 lines
10 KiB
C++
256 lines
10 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 <openspace/engine/openspaceengine.h>
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#include <openspace/rendering/screenspacerenderable.h>
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#include <openspace/util/factorymanager.h>
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namespace {
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const std::string _loggerCat = "ScreenSpaceRenderable";
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const std::string KeyType = "Type";
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}
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namespace openspace {
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ScreenSpaceRenderable* ScreenSpaceRenderable::createFromDictionary(const ghoul::Dictionary& dictionary) {
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std::string renderableType;
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bool success = dictionary.getValue(KeyType, renderableType);
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if (!success) {
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LERROR("ScreenSpaceRenderable did not have key '" << KeyType << "'");
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return nullptr;
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}
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ghoul::TemplateFactory<ScreenSpaceRenderable>* factory
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= FactoryManager::ref().factory<ScreenSpaceRenderable>();
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ScreenSpaceRenderable* result = factory->create(renderableType, dictionary);
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if (result == nullptr) {
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LERROR("Failed to create a ScreenSpaceRenderable object of type '" << renderableType << "'");
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return nullptr;
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}
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return result;
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}
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ScreenSpaceRenderable::ScreenSpaceRenderable()
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:_enabled("enabled", "Is Enabled", true)
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,_useFlatScreen("flatScreen", "Flat Screen", true)
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,_euclideanPosition("euclideanPosition", "Euclidean coordinates", glm::vec2(0),glm::vec2(-4),glm::vec2(4))
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,_sphericalPosition("sphericalPosition", "Spherical coordinates", glm::vec2(0, M_PI_2),glm::vec2(-M_PI),glm::vec2(M_PI))
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,_depth("depth", "Depth", 0, 0, 1)
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,_scale("scale", "Scale" , 0.25, 0, 2)
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,_alpha("alpha", "Alpha" , 1, 0, 1)
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,_delete("delete", "Delete")
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,_quad(0)
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,_vertexPositionBuffer(0)
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,_rendererPath("${SHADERS}/framebuffer/renderframebuffer.frag")
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,_vertexPath("${MODULE_BASE}/shaders/screnspace_vs.glsl")
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,_fragmentPath("${MODULE_BASE}/shaders/screnspace_fs.glsl")
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,_texture(nullptr)
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,_shader(nullptr)
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{
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addProperty(_enabled);
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addProperty(_useFlatScreen);
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addProperty(_euclideanPosition);
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addProperty(_sphericalPosition);
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addProperty(_depth);
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addProperty(_scale);
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addProperty(_alpha);
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addProperty(_delete);
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_rendererData = ghoul::Dictionary();
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_rendererData.setValue("fragmentRendererPath", _rendererPath);
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_rendererData.setValue("windowWidth", OsEng.windowWrapper().currentWindowResolution().x);
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_rendererData.setValue("windowHeight", OsEng.windowWrapper().currentWindowResolution().y);
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_radius = _planeDepth;
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useEuclideanCoordinates(_useFlatScreen.value());
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// Setting spherical/euclidean onchange handler
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_useFlatScreen.onChange([this](){
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if(_useFlatScreen.value()){
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OsEng.gui()._screenSpaceProperty.registerProperty(&_euclideanPosition, &_useFlatScreen);
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OsEng.gui()._screenSpaceProperty.unregisterProperty(&_sphericalPosition);
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} else {
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OsEng.gui()._screenSpaceProperty.unregisterProperty(&_euclideanPosition);
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OsEng.gui()._screenSpaceProperty.registerProperty(&_sphericalPosition, &_useFlatScreen);
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}
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useEuclideanCoordinates(_useFlatScreen.value());
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});
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_delete.onChange([this](){OsEng.renderEngine().unregisterScreenSpaceRenderable(name());});
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}
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ScreenSpaceRenderable::~ScreenSpaceRenderable(){}
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bool ScreenSpaceRenderable::isEnabled() const {
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return _enabled;
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}
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void ScreenSpaceRenderable::createPlane() {
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glGenVertexArrays(1, &_quad); // generate array
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glGenBuffers(1, &_vertexPositionBuffer); // generate buffer
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// ============================
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// GEOMETRY (quad)
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// ============================
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const GLfloat vertex_data[] = { // square of two triangles (sigh)
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// x y z w s t
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-1, -1, 0.0f, 1, 0, 1,
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1, 1, 0.0f, 1, 1, 0,
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-1, 1, 0.0f, 1, 0, 0,
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-1, -1, 0.0f, 1, 0, 1,
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1, -1, 0.0f, 1, 1, 1,
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1, 1, 0.0f, 1, 1, 0,
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};
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glBindVertexArray(_quad); // bind array
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glBindBuffer(GL_ARRAY_BUFFER, _vertexPositionBuffer); // bind buffer
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_data), vertex_data, GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 6, reinterpret_cast<void*>(0));
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 6, reinterpret_cast<void*>(sizeof(GLfloat) * 4));
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}
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void ScreenSpaceRenderable::useEuclideanCoordinates(bool b){
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_useEuclideanCoordinates = b;
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if(_useEuclideanCoordinates){
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_euclideanPosition.set(toEuclidean(_sphericalPosition.value(), _radius));
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} else {
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_sphericalPosition.set(toSpherical(_euclideanPosition.value()));
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}
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}
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glm::vec2 ScreenSpaceRenderable::toEuclidean(glm::vec2 polar, float r){
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float x = r*sin(polar[0])*sin(polar[1]);
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float y = r*cos(polar[1]);
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return glm::vec2(x, y);
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}
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glm::vec2 ScreenSpaceRenderable::toSpherical(glm::vec2 euclidean){
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_radius = -sqrt(pow(euclidean[0],2)+pow(euclidean[1],2)+pow(_planeDepth,2));
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float theta = atan2(-_planeDepth,euclidean[0])-M_PI/2.0;
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float phi = acos(euclidean[1]/_radius);
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return glm::vec2(theta, phi);
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}
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void ScreenSpaceRenderable::registerProperties(){
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OsEng.gui()._screenSpaceProperty.registerProperty(&_enabled);
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OsEng.gui()._screenSpaceProperty.registerProperty(&_useFlatScreen);
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OsEng.gui()._screenSpaceProperty.registerProperty(&_euclideanPosition);
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OsEng.gui()._screenSpaceProperty.registerProperty(&_depth);
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OsEng.gui()._screenSpaceProperty.registerProperty(&_scale);
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OsEng.gui()._screenSpaceProperty.registerProperty(&_alpha);
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OsEng.gui()._screenSpaceProperty.registerProperty(&_delete);
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}
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void ScreenSpaceRenderable::unregisterProperties(){
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OsEng.gui()._screenSpaceProperty.unregisterProperties(name());
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}
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void ScreenSpaceRenderable::createShaders(){
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if(!_shader) {
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ghoul::Dictionary dict = ghoul::Dictionary();
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dict.setValue("rendererData", _rendererData);
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dict.setValue("fragmentPath", _fragmentPath);
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_shader = ghoul::opengl::ProgramObject::Build("ScreenSpaceProgram",
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_vertexPath,
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"${SHADERS}/render.frag",
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dict
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);
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}
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}
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glm::mat4 ScreenSpaceRenderable::scaleMatrix(){
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glm::mat4 scale(1.0);
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glm::vec2 resolution = OsEng.windowWrapper().currentWindowResolution();
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//to scale the plane
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float textureRatio = (float(_texture->height())/float(_texture->width()));
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float scalingRatioX = _originalViewportSize[0]/ resolution[0];
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float scalingRatioY = _originalViewportSize[1]/ resolution[1];
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scale = glm::scale(scale, glm::vec3(_scale.value() * scalingRatioX,
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_scale.value() * scalingRatioY * textureRatio,
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1));
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return scale;
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}
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glm::mat4 ScreenSpaceRenderable::rotationMatrix(){
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glm::mat4 rotation(1.0);
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if(!_useEuclideanCoordinates){
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glm::vec2 position = _sphericalPosition.value();
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float theta = position.x;
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float phi = position.y - M_PI/2.0;
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rotation = glm::rotate(rotation, position.x, glm::vec3(0.0f, 1.0f, 0.0f));
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rotation = glm::rotate(rotation, (float) (position.y - M_PI/2.0) , glm::vec3(1.0f, 0.0f, 0.0f));
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}
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return rotation;
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}
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glm::mat4 ScreenSpaceRenderable::translationMatrix(){
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glm::mat4 translation(1.0);
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if(!_useEuclideanCoordinates){
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translation = glm::translate(translation, glm::vec3(0.0f, 0.0f, _planeDepth));
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}else{
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translation = glm::translate(glm::mat4(1.f), glm::vec3(_euclideanPosition.value(), _planeDepth));
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}
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return translation;
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}
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void ScreenSpaceRenderable::draw(glm::mat4 modelTransform){
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float occlusionDepth = 1-_depth.value();
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glEnable(GL_DEPTH_TEST);
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glDisable(GL_CULL_FACE);
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_shader->activate();
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_shader->setUniform("OcclusionDepth", occlusionDepth);
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_shader->setUniform("Alpha", _alpha);
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_shader->setUniform("ModelTransform",modelTransform);
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_shader->setUniform("ViewProjectionMatrix", OsEng.renderEngine().camera()->viewProjectionMatrix());
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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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glBindVertexArray(_quad);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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glEnable(GL_CULL_FACE);
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_shader->deactivate();
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}
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}// namespace openspace
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