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349 lines
11 KiB
C++
349 lines
11 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/space/rendering/renderablerings.h>
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#include <openspace/documentation/documentation.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/scenegraphnode.h>
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#include <openspace/scene/scene.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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static const openspace::properties::Property::PropertyInfo TextureInfo = {
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"Texture",
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"Texture",
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"This value is the path to a texture on disk that contains a one-dimensional "
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"texture which is used for these rings."
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};
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static const openspace::properties::Property::PropertyInfo SizeInfo = {
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"Size",
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"Size",
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"This value specifies the radius of the rings in meter."
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};
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static const openspace::properties::Property::PropertyInfo OffsetInfo = {
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"Offset",
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"Offset",
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"This value is used to limit the width of the rings.Each of the two values is a "
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"value between 0 and 1, where 0 is the center of the ring and 1 is the maximum "
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"extent at the radius. If this value is, for example {0.5, 1.0}, the ring is "
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"only shown between radius/2 and radius. It defaults to {0.0, 1.0}."
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};
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static const openspace::properties::Property::PropertyInfo NightFactorInfo = {
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"NightFactor",
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"Night Factor",
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"This value is a multiplicative factor that is applied to the side of the rings "
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"that is facing away from the Sun. If this value is equal to '1', no darkening "
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"of the night side occurs."
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};
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static const openspace::properties::Property::PropertyInfo TransparencyInfo = {
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"Transparency",
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"Transparency",
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"This value determines the transparency of part of the rings depending on the "
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"color values. For this value v, the transparency is equal to length(color) / v."
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};
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} // namespace
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namespace openspace {
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documentation::Documentation RenderableRings::Documentation() {
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using namespace documentation;
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return {
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"Renderable Rings",
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"space_renderable_rings",
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{
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{
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"Type",
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new StringEqualVerifier("RenderableRings"),
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"",
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Optional::No
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},
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{
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TextureInfo.identifier,
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new StringVerifier,
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TextureInfo.description,
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Optional::No
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},
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{
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SizeInfo.identifier,
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new DoubleVerifier,
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SizeInfo.description,
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Optional::No
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},
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{
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OffsetInfo.identifier,
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new DoubleVector2Verifier,
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OffsetInfo.description,
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Optional::Yes
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},
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{
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NightFactorInfo.identifier,
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new DoubleVerifier,
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NightFactorInfo.description,
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Optional::Yes
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},
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{
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TransparencyInfo.identifier,
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new DoubleVerifier,
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TransparencyInfo.description,
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Optional::Yes
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}
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},
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Exhaustive::Yes
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};
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}
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RenderableRings::RenderableRings(const ghoul::Dictionary& dictionary)
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: Renderable(dictionary)
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, _texturePath(TextureInfo)
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, _size(SizeInfo, 1.f, 0.f, 1e25)
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, _offset(OffsetInfo, glm::vec2(0.f, 1.f), glm::vec2(0.f), glm::vec2(1.f))
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, _nightFactor(NightFactorInfo, 0.33f, 0.f, 1.f)
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, _transparency(TransparencyInfo, 0.15f, 0.f, 1.f)
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, _shader(nullptr)
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, _texture(nullptr)
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, _textureFile(nullptr)
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, _textureIsDirty(false)
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, _quad(0)
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, _vertexPositionBuffer(0)
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, _planeIsDirty(false)
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{
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using ghoul::filesystem::File;
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documentation::testSpecificationAndThrow(
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Documentation(),
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dictionary,
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"RenderableRings"
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);
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_size = static_cast<float>(dictionary.value<double>(SizeInfo.identifier));
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setBoundingSphere(_size);
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_size.onChange([&]() { _planeIsDirty = true; });
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addProperty(_size);
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_texturePath = absPath(dictionary.value<std::string>(TextureInfo.identifier));
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_textureFile = std::make_unique<File>(_texturePath);
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if (dictionary.hasKey(OffsetInfo.identifier)) {
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_offset = dictionary.value<glm::vec2>(OffsetInfo.identifier);
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}
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addProperty(_offset);
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_texturePath.onChange([&]() { loadTexture(); });
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addProperty(_texturePath);
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_textureFile->setCallback([&](const File&) { _textureIsDirty = true; });
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if (dictionary.hasKey(NightFactorInfo.identifier)) {
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_nightFactor = static_cast<float>(
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dictionary.value<double>(NightFactorInfo.identifier)
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);
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}
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addProperty(_nightFactor);
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if (dictionary.hasKey(TransparencyInfo.identifier)) {
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_transparency = static_cast<float>(
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dictionary.value<double>(TransparencyInfo.identifier)
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);
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}
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addProperty(_transparency);
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}
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bool RenderableRings::isReady() const {
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return _shader && _texture;
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}
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bool RenderableRings::initialize() {
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if (!_shader) {
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RenderEngine& renderEngine = OsEng.renderEngine();
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_shader = renderEngine.buildRenderProgram("RingProgram",
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"${MODULE_SPACE}/shaders/rings_vs.glsl",
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"${MODULE_SPACE}/shaders/rings_fs.glsl"
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);
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_shader->setIgnoreUniformLocationError(
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ghoul::opengl::ProgramObject::IgnoreError::Yes
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);
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}
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glGenVertexArrays(1, &_quad);
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glGenBuffers(1, &_vertexPositionBuffer);
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createPlane();
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loadTexture();
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return isReady();
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}
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bool RenderableRings::deinitialize() {
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glDeleteVertexArrays(1, &_quad);
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_quad = 0;
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glDeleteBuffers(1, &_vertexPositionBuffer);
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_vertexPositionBuffer = 0;
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_textureFile = nullptr;
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_texture = nullptr;
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OsEng.renderEngine().removeRenderProgram(_shader);
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_shader = nullptr;
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return true;
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}
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void RenderableRings::render(const RenderData& data, RendererTasks&) {
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_shader->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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glm::dmat4 modelViewTransform = data.camera.combinedViewMatrix() * modelTransform;
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_shader->setUniform(
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"modelViewProjectionTransform",
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data.camera.projectionMatrix() * glm::mat4(modelViewTransform)
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);
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_shader->setUniform("textureOffset", _offset);
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_shader->setUniform("transparency", _transparency);
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_shader->setUniform("_nightFactor", _nightFactor);
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_shader->setUniform(
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"sunPosition",
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_sunPosition
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);
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setPscUniforms(*_shader, data.camera, data.position);
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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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glDisable(GL_CULL_FACE);
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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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void RenderableRings::update(const UpdateData& data) {
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if (_shader->isDirty()) {
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_shader->rebuildFromFile();
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}
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if (_planeIsDirty) {
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createPlane();
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_planeIsDirty = false;
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}
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if (_textureIsDirty) {
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loadTexture();
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_textureIsDirty = false;
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}
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_sunPosition = OsEng.renderEngine().scene()->sceneGraphNode("Sun")->worldPosition() -
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data.modelTransform.translation;
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}
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void RenderableRings::loadTexture() {
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if (_texturePath.value() != "") {
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std::unique_ptr<ghoul::opengl::Texture> texture =
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ghoul::io::TextureReader::ref().loadTexture(absPath(_texturePath));
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if (texture) {
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LDEBUGC(
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"RenderableRings",
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"Loaded texture from '" << absPath(_texturePath) << "'"
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);
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_texture = std::move(texture);
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_texture->uploadTexture();
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_texture->setFilter(ghoul::opengl::Texture::FilterMode::AnisotropicMipMap);
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_textureFile = std::make_unique<ghoul::filesystem::File>(_texturePath);
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_textureFile->setCallback(
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[&](const ghoul::filesystem::File&) { _textureIsDirty = true; }
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);
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}
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}
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}
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void RenderableRings::createPlane() {
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const GLfloat size = _size.value();
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struct VertexData {
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GLfloat x;
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GLfloat y;
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GLfloat s;
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GLfloat t;
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};
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VertexData data[] = {
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{ -size, -size, 0.f, 0.f },
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{ size, size, 1.f, 1.f },
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{ -size, size, 0.f, 1.f },
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{ -size, -size, 0.f, 0.f },
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{ size, -size, 1.f, 0.f },
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{ size, size, 1.f, 1.f },
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};
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glBindVertexArray(_quad);
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glBindBuffer(GL_ARRAY_BUFFER, _vertexPositionBuffer);
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glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(
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0,
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2,
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GL_FLOAT,
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GL_FALSE,
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sizeof(VertexData),
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reinterpret_cast<void*>(0)
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);
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(
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1,
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2,
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GL_FLOAT,
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GL_FALSE,
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sizeof(VertexData),
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reinterpret_cast<void*>(offsetof(VertexData, s))
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);
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}
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} // namespace openspace
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