mirror of
https://github.com/OpenSpace/OpenSpace.git
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226 lines
8.8 KiB
C++
226 lines
8.8 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/configurationmanager.h>
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#include <modules/newhorizons/rendering/renderableshadowcylinder.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/util/powerscaledcoordinate.h>
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#include <openspace/util/spicemanager.h>
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#include <ghoul/filesystem/filesystem>
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#include <ghoul/io/texture/texturereader.h>
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#include <ghoul/opengl/programobject.h>
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#include <ghoul/opengl/texture.h>
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#include <ghoul/opengl/textureunit.h>
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namespace {
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const std::string _loggerCat = "RenderablePlane";
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const std::string _keyType = "TerminatorType";
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const std::string _keyLightSource = "LightSource";
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const std::string _keyObserver = "Observer";
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const std::string _keyBody = "Body";
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const std::string _keyBodyFrame = "BodyFrame";
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const std::string _keyMainFrame = "MainFrame";
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const std::string _keyAberration = "Aberration";
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}
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namespace openspace {
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RenderableShadowCylinder::RenderableShadowCylinder(const ghoul::Dictionary& dictionary)
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: Renderable(dictionary)
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, _numberOfPoints("amountOfPoints", "Points", 190, 1, 300)
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, _shadowLength("shadowLength", "Shadow Length", 0.1, 0.0, 0.5)
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, _shadowColor("shadowColor", "Shadow Color",
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glm::vec4(1.f, 1.f, 1.f, 0.25f), glm::vec4(0.f), glm::vec4(1.f))
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, _shader(nullptr)
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, _vao(0)
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, _vbo(0)
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{
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addProperty(_numberOfPoints);
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addProperty(_shadowLength);
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addProperty(_shadowColor);
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bool success = dictionary.getValue(_keyType, _terminatorType);
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ghoul_assert(success, "");
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success = dictionary.getValue(_keyLightSource, _lightSource);
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ghoul_assert(success, "");
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success = dictionary.getValue(_keyObserver, _observer);
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ghoul_assert(success, "");
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success = dictionary.getValue(_keyBody, _body);
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ghoul_assert(success, "");
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success = dictionary.getValue(_keyBodyFrame, _bodyFrame);
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ghoul_assert(success, "");
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success = dictionary.getValue(_keyMainFrame, _mainFrame);
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ghoul_assert(success, "");
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std::string a = "NONE";
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success = dictionary.getValue(_keyAberration, a);
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_aberration = SpiceManager::AberrationCorrection(a);
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ghoul_assert(success, "");
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}
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RenderableShadowCylinder::~RenderableShadowCylinder() {}
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bool RenderableShadowCylinder::isReady() const {
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bool ready = true;
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if (!_shader)
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ready &= false;
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return ready;
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}
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bool RenderableShadowCylinder::initialize() {
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glGenVertexArrays(1, &_vao); // generate array
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glGenBuffers(1, &_vbo); // generate buffer
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bool completeSuccess = true;
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RenderEngine& renderEngine = OsEng.renderEngine();
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_shader = renderEngine.buildRenderProgram("ShadowProgram",
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"${MODULE_NEWHORIZONS}/shaders/terminatorshadow_vs.glsl",
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"${MODULE_NEWHORIZONS}/shaders/terminatorshadow_fs.glsl");
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if (!_shader)
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return false;
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return completeSuccess;
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}
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bool RenderableShadowCylinder::deinitialize() {
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RenderEngine& renderEngine = OsEng.renderEngine();
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if (_shader) {
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renderEngine.removeRenderProgram(_shader);
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_shader = nullptr;
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}
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glDeleteVertexArrays(1, &_vao);
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_vao = 0;
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glDeleteBuffers(1, &_vbo);
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_vbo = 0;
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return true;
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}
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void RenderableShadowCylinder::render(const RenderData& data){
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glm::mat4 _transform = glm::mat4(1.0);
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for (int i = 0; i < 3; i++){
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for (int j = 0; j < 3; j++){
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_transform[i][j] = static_cast<float>(_stateMatrix[i][j]);
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}
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}
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glDepthMask(false);
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// Activate shader
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_shader->activate();
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_shader->setUniform("ViewProjection", data.camera.viewProjectionMatrix());
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_shader->setUniform("ModelTransform", _transform);
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_shader->setUniform("shadowColor", _shadowColor);
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setPscUniforms(*_shader.get(), data.camera, data.position);
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glBindVertexArray(_vao);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, static_cast<GLsizei>(_vertices.size()));
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glBindVertexArray(0);
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_shader->deactivate();
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glDepthMask(true);
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}
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void RenderableShadowCylinder::update(const UpdateData& data) {
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_stateMatrix = SpiceManager::ref().positionTransformMatrix(_bodyFrame, _mainFrame, data.time);
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if (_shader->isDirty())
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_shader->rebuildFromFile();
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createCylinder(data.time);
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}
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glm::vec4 psc_addition(glm::vec4 v1, glm::vec4 v2) {
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float k = 10.f;
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float ds = v2.w - v1.w;
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if (ds >= 0) {
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float p = pow(k, -ds);
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return glm::vec4(v1.x*p + v2.x, v1.y*p + v2.y, v1.z*p + v2.z, v2.w);
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}
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else {
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float p = pow(k, ds);
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return glm::vec4(v1.x + v2.x*p, v1.y + v2.y*p, v1.z + v2.z*p, v1.w);
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}
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}
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void RenderableShadowCylinder::createCylinder(double time) {
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double targetEpoch;
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glm::dvec3 observerPosition;
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std::vector<psc> terminatorPoints;
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SpiceManager::TerminatorType t = SpiceManager::terminatorTypeFromString(_terminatorType);
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// if (_terminatorType == "UMBRAL")
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// t = SpiceManager::TerminatorType::Umbral;
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// else if (_terminatorType == "PENUMBRAL")
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// t = SpiceManager::TerminatorType::Penumbral;
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auto res = SpiceManager::ref().terminatorEllipse(_body, _observer, _bodyFrame,
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_lightSource, t, _aberration, time, _numberOfPoints);
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targetEpoch = res.targetEphemerisTime;
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observerPosition = std::move(res.observerPosition);
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std::vector<glm::dvec3> ps = std::move(res.terminatorPoints);
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for (auto&& p : ps) {
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PowerScaledCoordinate psc = PowerScaledCoordinate::CreatePowerScaledCoordinate(p.x, p.y, p.z);
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psc[3] += 3;
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terminatorPoints.push_back(psc);
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}
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double lt;
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glm::dvec3 vecLightSource =
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SpiceManager::ref().targetPosition(_body, _lightSource, _mainFrame, _aberration, time, lt);
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glm::dmat3 _stateMatrix = glm::inverse(SpiceManager::ref().positionTransformMatrix(_bodyFrame, _mainFrame, time));
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vecLightSource = _stateMatrix * vecLightSource;
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vecLightSource *= _shadowLength;
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_vertices.clear();
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psc endpoint = psc::CreatePowerScaledCoordinate(vecLightSource.x, vecLightSource.y, vecLightSource.z);
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for (auto v : terminatorPoints){
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_vertices.push_back(CylinderVBOLayout(v[0], v[1], v[2], v[3]));
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glm::vec4 f = psc_addition(v.vec4(), endpoint.vec4());
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_vertices.push_back(CylinderVBOLayout(f[0], f[1], f[2], f[3]));
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}
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_vertices.push_back(_vertices[0]);
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_vertices.push_back(_vertices[1]);
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glBindVertexArray(_vao); // bind array
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glBindBuffer(GL_ARRAY_BUFFER, _vbo); // bind buffer
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glBufferData(GL_ARRAY_BUFFER, _vertices.size() * sizeof(CylinderVBOLayout), NULL, GL_DYNAMIC_DRAW); // orphaning the buffer, sending NULL data.
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glBufferSubData(GL_ARRAY_BUFFER, 0, _vertices.size() * sizeof(CylinderVBOLayout), &_vertices[0]);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, 0);
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glBindVertexArray(0);
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}
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} // namespace openspace
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