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382 lines
14 KiB
C++
382 lines
14 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/base/rendering/renderabletrail.h>
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#include <openspace/documentation/verifier.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/scene/translation.h>
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namespace {
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const char* KeyTranslation = "Translation";
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const char* KeyColor = "Color";
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const char* KeyEnableFade = "EnableFade";
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const char* KeyFade = "Fade";
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const char* KeyLineWidth = "LineWidth";
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const char* KeyPointSize = "PointSize";
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const char* KeyRendering = "Rendering";
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// The possible values for the _renderingModes property
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enum RenderingMode {
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RenderingModeLines = 0,
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RenderingModePoints,
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RenderingModeLinesPoints
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};
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// Fragile! Keep in sync with documentation
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static const std::map<std::string, RenderingMode> RenderingModeConversion = {
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{ "Lines", RenderingModeLines },
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{ "Points", RenderingModePoints },
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{ "Lines+Points", RenderingModeLinesPoints },
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{ "Points+Lines", RenderingModeLinesPoints }
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};
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}
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namespace openspace {
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Documentation RenderableTrail::Documentation() {
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using namespace documentation;
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return {
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"RenderableTrail",
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"base_renderable_renderabletrail",
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{
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{
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KeyTranslation,
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new ReferencingVerifier("core_transform_translation"),
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"This object is used to compute locations along the path. Any "
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"Translation object can be used here.",
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Optional::No
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},
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{
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KeyColor,
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new DoubleVector3Verifier,
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"The main color the for lines and points on this trail. The value is "
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"interpreted as an RGB value.",
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Optional::No
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},
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{
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KeyEnableFade,
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new BoolVerifier,
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"Toggles whether the trail should fade older points out. If this value "
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"is 'true', the 'Fade' parameter determines the speed of fading. If this "
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"value is 'false', the entire trail is rendered at full opacity and "
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"color. The default value is 'true'.",
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Optional::Yes
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},
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{
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KeyFade,
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new DoubleVerifier,
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"The fading factor that is applied to the trail if the 'EnableFade' "
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"value is 'true'. If it is 'false', this setting has no effect. The "
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"higher the number, the less fading is applied. This value defaults to "
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"1.0.",
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Optional::Yes
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},
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{
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KeyLineWidth,
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new DoubleVerifier,
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"This value specifies the line width of the trail if this rendering "
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"method is selected. It defaults to 2.0.",
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Optional::Yes
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},
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{
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KeyPointSize,
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new DoubleVerifier,
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"This value specifies the base size of the points along the line if this "
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"rendering method is selected. If a subsampling of the values is "
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"performed, the subsampled values are half this size. The default value "
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"is 1.0.",
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Optional::Yes
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},
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{
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KeyRendering,
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new StringInListVerifier(
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// Taken from the RenderingModeConversion map above
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{ "Lines", "Points", "Lines+Points", "Points + Lines" }
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),
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"Determines how the trail should be rendered to the screen. If 'Lines' "
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"is selected, only the line part is visible, if 'Points' is selected, "
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"only the corresponding points (and subpoints) are shown. "
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"Lines+Points' shows both parts. On default, only the lines are rendered",
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Optional::Yes
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}
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},
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Exhaustive::No
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};
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}
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RenderableTrail::RenderableTrail(const ghoul::Dictionary& dictionary)
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: Renderable(dictionary)
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, _lineColor("lineColor", "Color", glm::vec3(1.f), glm::vec3(0.f), glm::vec3(1.f))
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, _useLineFade("useLineFade", "Use Line Fade", true)
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, _lineFade("lineFade", "Line Fade", 1.f, 0.f, 20.f)
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, _lineWidth("lineWidth", "Line Width", 2.f, 1.f, 20.f)
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, _pointSize("pointSize", "Point Size", 1, 1, 64)
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, _renderingModes(
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"renderingMode",
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"Rendering Mode",
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properties::OptionProperty::DisplayType::Dropdown
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)
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{
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_translation = std::unique_ptr<Translation>(Translation::createFromDictionary(
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dictionary.value<ghoul::Dictionary>(KeyTranslation)
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));
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addPropertySubOwner(_translation.get());
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_lineColor = dictionary.value<glm::vec3>(KeyColor);
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addProperty(_lineColor);
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if (dictionary.hasKeyAndValue<bool>(KeyEnableFade)) {
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_useLineFade = dictionary.value<bool>(KeyEnableFade);
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}
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addProperty(_useLineFade);
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if (dictionary.hasKeyAndValue<double>(KeyFade)) {
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_lineFade = dictionary.value<double>(KeyFade);
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}
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addProperty(_lineFade);
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if (dictionary.hasKeyAndValue<double>(KeyLineWidth)) {
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_lineWidth = dictionary.value<double>(KeyLineWidth);
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}
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addProperty(_lineWidth);
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if (dictionary.hasKeyAndValue<double>(KeyPointSize)) {
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_pointSize = dictionary.value<double>(KeyPointSize);
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}
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addProperty(_pointSize);
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_renderingModes.addOptions({
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{ RenderingModeLines, "Lines" },
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{ RenderingModePoints, "Points" },
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{ RenderingModeLinesPoints, "Lines+Points" }
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});
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// This map is not accessed out of order as long as the Documentation is adapted
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// whenever the map changes. The documentation will check for valid values
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if (dictionary.hasKeyAndValue<std::string>(KeyRendering)) {
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_renderingModes = RenderingModeConversion.at(
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dictionary.value<std::string>(KeyRendering)
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);
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}
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else {
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_renderingModes = RenderingModeLines;
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}
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addProperty(_renderingModes);
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}
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bool RenderableTrail::initialize() {
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RenderEngine& renderEngine = OsEng.renderEngine();
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_programObject = renderEngine.buildRenderProgram(
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"EphemerisProgram",
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"${MODULE_BASE}/shaders/renderabletrail_vs.glsl",
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"${MODULE_BASE}/shaders/renderabletrail_fs.glsl"
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);
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setRenderBin(Renderable::RenderBin::Overlay);
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return true;
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}
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bool RenderableTrail::deinitialize() {
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RenderEngine& renderEngine = OsEng.renderEngine();
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if (_programObject) {
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renderEngine.removeRenderProgram(_programObject);
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_programObject = nullptr;
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}
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return true;
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}
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bool RenderableTrail::isReady() const {
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return _programObject != nullptr;
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}
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void RenderableTrail::render(const RenderData & data) {
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_programObject->activate();
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glm::dmat4 modelTransform =
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glm::translate(glm::dmat4(1.0), data.modelTransform.translation) *
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glm::dmat4(data.modelTransform.rotation) *
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glm::dmat4(glm::scale(glm::dmat4(1.0), glm::dvec3(data.modelTransform.scale)));
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_programObject->setUniform("projectionTransform", data.camera.projectionMatrix());
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_programObject->setUniform("color", _lineColor);
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_programObject->setUniform("useLineFade", _useLineFade);
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if (_useLineFade) {
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_programObject->setUniform("lineFade", _lineFade);
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}
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static std::map<RenderInformation::VertexSorting, int> SortingMapping = {
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// Fragile! Keep in sync with shader
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{ RenderInformation::VertexSorting::NewestFirst, 0 },
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{ RenderInformation::VertexSorting::OldestFirst, 1 },
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{ RenderInformation::VertexSorting::NoSorting, 2}
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};
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bool usingFramebufferRenderer =
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OsEng.renderEngine().rendererImplementation() ==
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RenderEngine::RendererImplementation::Framebuffer;
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if (usingFramebufferRenderer) {
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glDepthMask(false);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE);
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}
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bool renderLines =
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_renderingModes == RenderingModeLines |
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_renderingModes == RenderingModeLinesPoints;
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bool renderPoints =
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_renderingModes == RenderingModePoints |
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_renderingModes == RenderingModeLinesPoints;
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if (renderLines) {
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glLineWidth(_lineWidth);
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}
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if (renderPoints) {
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glEnable(GL_PROGRAM_POINT_SIZE);
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}
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auto render = [renderLines, renderPoints, p = _programObject.get(), &data,
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&modelTransform, pointSize = _pointSize.value()]
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(RenderInformation& info, int nVertices, int offset)
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{
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// We pass in the model view transformation matrix as double in order to maintain
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// high precision for vertices; especially for the trails, a high vertex precision
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// is necessary as they are usually far away from their reference
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p->setUniform(
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"modelViewTransform",
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data.camera.combinedViewMatrix() * modelTransform * info._localTransform
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);
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// The vertex sorting method is used to tweak the fading along the trajectory
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p->setUniform(
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"vertexSortingMethod",
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SortingMapping[info.sorting]
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);
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// This value is subtracted from the vertex id in the case of a potential ring
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// buffer (as used in RenderableTrailOrbit) to keep the first vertex at its
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// brightest
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p->setUniform(
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"idOffset",
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offset
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);
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p->setUniform("nVertices", nVertices);
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if (renderPoints) {
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// The stride parameter determines the distance between larger points and
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// smaller ones
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p->setUniform("stride", info.stride);
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p->setUniform("pointSize", pointSize);
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}
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// Fragile! Keep in sync with fragment shader
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enum RenderPhase {
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RenderPhaseLines = 0,
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RenderPhasePoints
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};
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glBindVertexArray(info._vaoID);
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if (renderLines) {
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p->setUniform("renderPhase", RenderPhaseLines);
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// Subclasses of this renderer might be using the index array or might now be
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// so we check if there is data available and if there isn't, we use the
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// glDrawArrays draw call; otherwise the glDrawElements
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if (info._iBufferID == 0) {
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glDrawArrays(
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GL_LINE_STRIP,
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info.first,
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info.count
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);
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}
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else {
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glDrawElements(
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GL_LINE_STRIP,
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info.count,
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GL_UNSIGNED_INT,
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reinterpret_cast<void*>(info.first * sizeof(unsigned int))
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);
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}
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}
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if (renderPoints) {
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// Subclasses of this renderer might be using the index array or might now be
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// so we check if there is data available and if there isn't, we use the
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// glDrawArrays draw call; otherwise the glDrawElements
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p->setUniform("renderPhase", RenderPhasePoints);
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if (info._iBufferID == 0) {
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glDrawArrays(GL_POINTS, info.first, info.count);
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}
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else {
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glDrawElements(
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GL_POINTS,
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info.count,
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GL_UNSIGNED_INT,
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reinterpret_cast<void*>(info.first * sizeof(unsigned int))
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);
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}
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}
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};
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// The combined size of vertices; -1 because we duplicate the penultimate point
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int totalNumber =
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_primaryRenderInformation.count + _floatingRenderInformation.count - 1;
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// The primary information might use an index buffer, so we might need to start at an
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// offset
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int primaryOffset =
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_primaryRenderInformation._iBufferID == 0 ? 0 : _primaryRenderInformation.first;
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// Render the primary batch of vertices
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render(_primaryRenderInformation, totalNumber, primaryOffset);
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// The secondary batch is optional,. so we need to check whether we have any data here
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if (_floatingRenderInformation._vaoID == 0 || _floatingRenderInformation.count == 0) {
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render(
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_floatingRenderInformation,
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totalNumber,
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// -1 because we duplicate the penultimate point between the vertices
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primaryOffset + _primaryRenderInformation.count - 1
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);
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}
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if (renderPoints) {
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glDisable(GL_PROGRAM_POINT_SIZE);
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}
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glBindVertexArray(0);
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if (usingFramebufferRenderer) {
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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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_programObject->deactivate();
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}
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} // namespace openspace
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