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326 lines
13 KiB
C++
326 lines
13 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2017 *
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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/fieldlinessequence/rendering/renderablefieldlinessequence.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/updatestructures.h>
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#include <ghoul/opengl/programobject.h>
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#include <ghoul/opengl/textureunit.h>
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namespace {
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std::string _loggerCat = "RenderableFieldlinesSequence";
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const GLuint _VA_POSITION = 0; // MUST CORRESPOND TO THE SHADER PROGRAM
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const GLuint _VA_COLOR = 1; // MUST CORRESPOND TO THE SHADER PROGRAM
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const GLuint _VA_MASKING = 2; // MUST CORRESPOND TO THE SHADER PROGRAM
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} // namespace
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namespace openspace {
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void RenderableFieldlinesSequence::deinitialize() {
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glDeleteVertexArrays(1, &_vertexArrayObject);
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_vertexArrayObject = 0;
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glDeleteBuffers(1, &_vertexPositionBuffer);
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_vertexPositionBuffer = 0;
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glDeleteBuffers(1, &_vertexColorBuffer);
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_vertexColorBuffer = 0;
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glDeleteBuffers(1, &_vertexMaskingBuffer);
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_vertexMaskingBuffer = 0;
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RenderEngine& renderEngine = OsEng.renderEngine();
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if (_shaderProgram) {
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renderEngine.removeRenderProgram(_shaderProgram);
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_shaderProgram = nullptr;
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}
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// Stall main thread until thread that's loading states is done!
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while (_isLoadingStateFromDisk) {
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LWARNING("TRYING TO DESTROY CLASS WHEN A THREAD USING IT IS STILL ACTIVE");
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}
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}
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bool RenderableFieldlinesSequence::isReady() const {
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return _isReady;
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}
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void RenderableFieldlinesSequence::render(const RenderData& data, RendererTasks&) {
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if (_activeTriggerTimeIndex != -1) {
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_shaderProgram->activate();
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// Calculate Model View MatrixProjection
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const glm::dmat4 ROT_MAT = glm::dmat4(data.modelTransform.rotation);
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// const glm::mat4 SCALE_TRANSFORM = glm::mat4(1.0); // TODO remove if no use
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const glm::dmat4 MODEL_MAT =
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glm::translate(glm::dmat4(1.0), data.modelTransform.translation) *
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ROT_MAT *
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glm::dmat4(glm::scale(glm::dmat4(1), glm::dvec3(data.modelTransform.scale)));
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const glm::dmat4 MODEL_VIEW_MAT = data.camera.combinedViewMatrix() * MODEL_MAT;
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_shaderProgram->setUniform("modelViewProjection",
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data.camera.sgctInternal.projectionMatrix() * glm::mat4(MODEL_VIEW_MAT));
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_shaderProgram->setUniform("colorMethod", _pColorMethod);
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_shaderProgram->setUniform("lineColor", _pColorUniform);
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_shaderProgram->setUniform("usingDomain", _pDomainEnabled);
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_shaderProgram->setUniform("usingMasking", _pMaskingEnabled);
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if (_pColorMethod == ColorMethod::BY_QUANTITY) {
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ghoul::opengl::TextureUnit textureUnit;
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textureUnit.activate();
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_transferFunction->bind(); // Calls update internally
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_shaderProgram->setUniform("colorTable", textureUnit);
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_shaderProgram->setUniform("colorTableRange",
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_colorTableRanges[_pColorQuantity]);
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}
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if (_pMaskingEnabled) {
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_shaderProgram->setUniform("maskingRange", _maskingRanges[_pMaskingQuantity]);
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}
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_shaderProgram->setUniform("domainLimR", _pDomainR.value() * _scalingFactor);
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_shaderProgram->setUniform("domainLimX", _pDomainX.value() * _scalingFactor);
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_shaderProgram->setUniform("domainLimY", _pDomainY.value() * _scalingFactor);
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_shaderProgram->setUniform("domainLimZ", _pDomainZ.value() * _scalingFactor);
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// Flow/Particles
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_shaderProgram->setUniform("flowColor", _pFlowColor);
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_shaderProgram->setUniform("usingParticles", _pFlowEnabled);
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_shaderProgram->setUniform("particleSize", _pFlowParticleSize);
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_shaderProgram->setUniform("particleSpacing", _pFlowParticleSpacing);
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_shaderProgram->setUniform("particleSpeed", _pFlowSpeed);
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_shaderProgram->setUniform("time", OsEng.runTime() * (_pFlowReversed ? -1 : 1));
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bool additiveBlending = false;
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if (_pColorABlendEnabled) {
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const auto RENDERER = OsEng.renderEngine().rendererImplementation();
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bool usingFBufferRenderer = RENDERER ==
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RenderEngine::RendererImplementation::Framebuffer;
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bool usingABufferRenderer = RENDERER ==
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RenderEngine::RendererImplementation::ABuffer;
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if (usingABufferRenderer) {
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_shaderProgram->setUniform("usingAdditiveBlending", _pColorABlendEnabled);
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}
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additiveBlending = usingFBufferRenderer;
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if (additiveBlending) {
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glDepthMask(false);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE);
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}
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}
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glBindVertexArray(_vertexArrayObject);
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glMultiDrawArrays(
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GL_LINE_STRIP, //_drawingOutputType,
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_states[_activeStateIndex].lineStart().data(),
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_states[_activeStateIndex].lineCount().data(),
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static_cast<GLsizei>(_states[_activeStateIndex].lineStart().size())
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);
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glBindVertexArray(0);
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_shaderProgram->deactivate();
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if (additiveBlending) {
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glDepthMask(true);
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}
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}
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}
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void RenderableFieldlinesSequence::update(const UpdateData& data) {
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if (_shaderProgram->isDirty()) {
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_shaderProgram->rebuildFromFile();
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}
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// This node shouldn't do anything if its been disabled from the gui!
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if (_enabled) {
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const double CURRENT_TIME = data.time.j2000Seconds();
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// Check if current time in OpenSpace is within sequence interval
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if (isWithinSequenceInterval(CURRENT_TIME)) {
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const int NEXT_IDX = _activeTriggerTimeIndex + 1;
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if (_activeTriggerTimeIndex < 0 // true => Previous frame was not within the sequence interval
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|| CURRENT_TIME < _startTimes[_activeTriggerTimeIndex] // true => OpenSpace has stepped back to a time represented by another state
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|| (NEXT_IDX < _nStates && CURRENT_TIME >= _startTimes[NEXT_IDX])) { // true => OpenSpace has stepped forward to a time represented by another state
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updateActiveTriggerTimeIndex(CURRENT_TIME);
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if (_loadingStatesDynamically) {
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_mustLoadNewStateFromDisk = true;
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} else {
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_needsUpdate = true;
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_activeStateIndex = _activeTriggerTimeIndex;
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}
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} // else {we're still in same state as previous frame (no changes needed)}
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} else {
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// Not in interval => set everything to false
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_activeTriggerTimeIndex = -1;
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_mustLoadNewStateFromDisk = false;
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_needsUpdate = false;
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}
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if (_mustLoadNewStateFromDisk) {
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if (!_isLoadingStateFromDisk && !_newStateIsReady) {
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_isLoadingStateFromDisk = true;
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_mustLoadNewStateFromDisk = false;
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const std::string FILEPATH = _sourceFiles[_activeTriggerTimeIndex];
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std::thread readBinaryThread([this, FILEPATH] {
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this->readNewState(FILEPATH);
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});
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readBinaryThread.detach();
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}
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}
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if (_needsUpdate || _newStateIsReady) {
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if (_loadingStatesDynamically) {
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_states[0] = std::move(*_newState);
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}
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updateVertexPositionBuffer();
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if (_states[_activeStateIndex].nExtraQuantities() > 0) {
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_shouldUpdateColorBuffer = true;
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_shouldUpdateMaskingBuffer = true;
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} else {
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_pColorMethod = ColorMethod::UNIFORM;
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}
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// Everything is set and ready for rendering!
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_needsUpdate = false;
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_newStateIsReady = false;
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}
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if (_shouldUpdateColorBuffer) {
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updateVertexColorBuffer();
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_shouldUpdateColorBuffer = false;
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}
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if (_shouldUpdateMaskingBuffer) {
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updateVertexMaskingBuffer();
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_shouldUpdateMaskingBuffer = false;
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}
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}
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}
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inline bool RenderableFieldlinesSequence::isWithinSequenceInterval(const double CURRENT_TIME) const {
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return (CURRENT_TIME >= _startTimes[0]) && (CURRENT_TIME < _sequenceEndTime);
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}
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// Assumes we already know that CURRENT_TIME is within the sequence interval
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void RenderableFieldlinesSequence::updateActiveTriggerTimeIndex(const double CURRENT_TIME) {
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auto iter = std::upper_bound(_startTimes.begin(), _startTimes.end(), CURRENT_TIME);
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if (iter != _startTimes.end()) {
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if ( iter != _startTimes.begin()) {
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_activeTriggerTimeIndex =
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static_cast<int>(std::distance(_startTimes.begin(), iter)) - 1;
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} else {
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_activeTriggerTimeIndex = 0;
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}
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} else {
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_activeTriggerTimeIndex = static_cast<int>(_nStates) - 1;
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}
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}
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// Reading state from disk. Must be thread safe!
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void RenderableFieldlinesSequence::readNewState(const std::string& FILEPATH) {
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_newState = std::make_unique<FieldlinesState>();
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if (_newState->loadStateFromOsfls(FILEPATH)) {
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_newStateIsReady = true;
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}
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_isLoadingStateFromDisk = false;
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}
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// Unbind buffers and arrays
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inline void unbindGL() {
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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}
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void RenderableFieldlinesSequence::updateVertexPositionBuffer() {
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glBindVertexArray(_vertexArrayObject);
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glBindBuffer(GL_ARRAY_BUFFER, _vertexPositionBuffer);
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const std::vector<glm::vec3>& VERTEX_POS_VEC =
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_states[_activeStateIndex].vertexPositions();
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glBufferData(GL_ARRAY_BUFFER, VERTEX_POS_VEC.size() * sizeof(glm::vec3),
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&VERTEX_POS_VEC.front(), GL_STATIC_DRAW);
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glEnableVertexAttribArray(_VA_POSITION);
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glVertexAttribPointer(_VA_POSITION, 3, GL_FLOAT, GL_FALSE, 0, 0);
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unbindGL();
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}
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void RenderableFieldlinesSequence::updateVertexColorBuffer() {
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glBindVertexArray(_vertexArrayObject);
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glBindBuffer(GL_ARRAY_BUFFER, _vertexColorBuffer);
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bool isSuccessful;
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const std::vector<float>& QUANTITY_VEC =
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_states[_activeStateIndex].extraQuantity(_pColorQuantity, isSuccessful);
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if (isSuccessful) {
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glBufferData(GL_ARRAY_BUFFER, QUANTITY_VEC.size() * sizeof(float),
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&QUANTITY_VEC.front(), GL_STATIC_DRAW);
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glEnableVertexAttribArray(_VA_COLOR);
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glVertexAttribPointer(_VA_COLOR, 1, GL_FLOAT, GL_FALSE, 0, 0);
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unbindGL();
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}
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}
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void RenderableFieldlinesSequence::updateVertexMaskingBuffer() {
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glBindVertexArray(_vertexArrayObject);
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glBindBuffer(GL_ARRAY_BUFFER, _vertexMaskingBuffer);
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bool isSuccessful;
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const std::vector<float>& QUANTITY_VEC =
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_states[_activeStateIndex].extraQuantity(_pMaskingQuantity, isSuccessful);
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if (isSuccessful) {
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glBufferData(GL_ARRAY_BUFFER, QUANTITY_VEC.size() * sizeof(float),
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&QUANTITY_VEC.front(), GL_STATIC_DRAW);
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glEnableVertexAttribArray(_VA_MASKING);
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glVertexAttribPointer(_VA_MASKING, 1, GL_FLOAT, GL_FALSE, 0, 0);
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unbindGL();
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}
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}
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} // namespace openspace
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