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https://github.com/OpenSpace/OpenSpace.git
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428 lines
19 KiB
C++
428 lines
19 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/globebrowsing/chunk/chunkrenderer.h>
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#include <modules/globebrowsing/chunk/chunkedlodglobe.h>
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#include <modules/globebrowsing/tile/layeredtextures.h>
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// open space includes
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#include <openspace/engine/wrapper/windowwrapper.h>
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#include <openspace/engine/openspaceengine.h>
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#include <openspace/rendering/renderengine.h>
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// ghoul includes
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#include <ghoul/misc/assert.h>
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#include <ghoul/opengl/texture.h>
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#include <ghoul/opengl/textureunit.h>
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// STL includes
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#include <sstream>
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#define _USE_MATH_DEFINES
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#include <math.h>
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namespace {
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const std::string _loggerCat = "PatchRenderer";
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const std::string keyFrame = "Frame";
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const std::string keyGeometry = "Geometry";
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const std::string keyShading = "PerformShading";
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const std::string keyBody = "Body";
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}
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namespace openspace {
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ChunkRenderer::ChunkRenderer(
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std::shared_ptr<Grid> grid,
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std::shared_ptr<TileProviderManager> tileProviderManager)
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: _tileProviderManager(tileProviderManager)
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, _grid(grid)
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{
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_globalRenderingShaderProvider = std::shared_ptr<LayeredTextureShaderProvider>
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(new LayeredTextureShaderProvider(
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"GlobalChunkedLodPatch",
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"${MODULE_GLOBEBROWSING}/shaders/globalchunkedlodpatch_vs.glsl",
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"${MODULE_GLOBEBROWSING}/shaders/globalchunkedlodpatch_fs.glsl"));
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_localRenderingShaderProvider = std::shared_ptr<LayeredTextureShaderProvider>
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(new LayeredTextureShaderProvider(
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"LocalChunkedLodPatch",
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"${MODULE_GLOBEBROWSING}/shaders/localchunkedlodpatch_vs.glsl",
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"${MODULE_GLOBEBROWSING}/shaders/localchunkedlodpatch_fs.glsl"));
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_globalProgramUniformHandler = std::shared_ptr<LayeredTextureShaderUniformIdHandler>
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(new LayeredTextureShaderUniformIdHandler());
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_localProgramUniformHandler = std::shared_ptr<LayeredTextureShaderUniformIdHandler>
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(new LayeredTextureShaderUniformIdHandler());
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}
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void ChunkRenderer::renderChunk(const Chunk& chunk, const RenderData& data) {
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if (chunk.index().level < 10) {
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renderChunkGlobally(chunk, data);
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}
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else {
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renderChunkLocally(chunk, data);
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}
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}
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void ChunkRenderer::update() {
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// unued atm. Could be used for caching or precalculating
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}
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void ChunkRenderer::setDepthTransformUniforms(
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std::shared_ptr<LayeredTextureShaderUniformIdHandler> uniformIdHandler,
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LayeredTextures::TextureCategory textureCategory,
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LayeredTextureShaderUniformIdHandler::BlendLayerSuffix blendLayerSuffix,
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size_t layerIndex,
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const TileDepthTransform& tileDepthTransform)
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{
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uniformIdHandler->programObject().setUniform(
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uniformIdHandler->getId(
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textureCategory,
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blendLayerSuffix,
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layerIndex,
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LayeredTextureShaderUniformIdHandler::GlslTileDataId::depthTransform_depthScale),
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tileDepthTransform.depthScale);
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uniformIdHandler->programObject().setUniform(
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uniformIdHandler->getId(
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textureCategory,
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blendLayerSuffix,
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layerIndex,
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LayeredTextureShaderUniformIdHandler::GlslTileDataId::depthTransform_depthOffset),
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tileDepthTransform.depthOffset);
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}
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void ChunkRenderer::activateTileAndSetTileUniforms(
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std::shared_ptr<LayeredTextureShaderUniformIdHandler> uniformIdHandler,
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LayeredTextures::TextureCategory textureCategory,
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LayeredTextureShaderUniformIdHandler::BlendLayerSuffix blendLayerSuffix,
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size_t layerIndex,
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ghoul::opengl::TextureUnit& texUnit,
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const TileAndTransform& tileAndTransform)
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{
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// Blend tile with two parents
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// The texture needs a unit to sample from
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texUnit.activate();
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tileAndTransform.tile.texture->bind();
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uniformIdHandler->programObject().setUniform(
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uniformIdHandler->getId(
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textureCategory,
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blendLayerSuffix,
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layerIndex,
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LayeredTextureShaderUniformIdHandler::GlslTileDataId::textureSampler),
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texUnit);
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uniformIdHandler->programObject().setUniform(
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uniformIdHandler->getId(
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textureCategory,
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blendLayerSuffix,
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layerIndex,
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LayeredTextureShaderUniformIdHandler::GlslTileDataId::uvTransform_uvScale),
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tileAndTransform.uvTransform.uvScale);
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uniformIdHandler->programObject().setUniform(
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uniformIdHandler->getId(
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textureCategory,
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blendLayerSuffix,
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layerIndex,
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LayeredTextureShaderUniformIdHandler::GlslTileDataId::uvTransform_uvOffset),
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tileAndTransform.uvTransform.uvOffset);
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}
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ProgramObject* ChunkRenderer::getActivatedProgramWithTileData(
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LayeredTextureShaderProvider* layeredTextureShaderProvider,
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std::shared_ptr<LayeredTextureShaderUniformIdHandler> programUniformHandler,
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const Chunk& chunk)
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{
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const ChunkIndex& chunkIndex = chunk.index();
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std::array<std::vector<std::shared_ptr<TileProvider> >,
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LayeredTextures::NUM_TEXTURE_CATEGORIES> tileProviders;
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LayeredTexturePreprocessingData layeredTexturePreprocessingData;
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for (size_t category = 0; category < LayeredTextures::NUM_TEXTURE_CATEGORIES; category++)
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{
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tileProviders[category] = _tileProviderManager->getActivatedLayerCategory(
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LayeredTextures::TextureCategory(category));
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LayeredTextureInfo layeredTextureInfo;
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layeredTextureInfo.lastLayerIdx = tileProviders[category].size() - 1;
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layeredTextureInfo.layerBlendingEnabled = chunk.owner()->blendProperties[category];
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layeredTexturePreprocessingData.layeredTextureInfo[category] = layeredTextureInfo;
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}
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layeredTexturePreprocessingData.keyValuePairs.push_back(
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std::pair<std::string, std::string>(
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"useAtmosphere",
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std::to_string(chunk.owner()->atmosphereEnabled)));
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layeredTexturePreprocessingData.keyValuePairs.push_back(
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std::pair<std::string, std::string>(
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"showChunkEdges",
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std::to_string(chunk.owner()->showChunkEdges)));
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// Now the shader program can be accessed
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ProgramObject* programObject =
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layeredTextureShaderProvider->getUpdatedShaderProgram(
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layeredTexturePreprocessingData);
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programUniformHandler->updateIdsIfNecessary(layeredTextureShaderProvider);
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// Activate the shader program
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programObject->activate();
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// Initialize all texture units
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struct BlendTexUnits {
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ghoul::opengl::TextureUnit blendTexture0;
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ghoul::opengl::TextureUnit blendTexture1;
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ghoul::opengl::TextureUnit blendTexture2;
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};
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std::array<std::vector<BlendTexUnits>,
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LayeredTextures::NUM_TEXTURE_CATEGORIES> texUnits;
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for (size_t category = 0; category < LayeredTextures::NUM_TEXTURE_CATEGORIES; category++) {
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texUnits[category].resize(tileProviders[category].size());
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}
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// Go through all the categories
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for (size_t category = 0; category < LayeredTextures::NUM_TEXTURE_CATEGORIES; category++)
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{
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// Go through all the providers in this category
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int i = 0;
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for (auto it = tileProviders[category].begin(); it != tileProviders[category].end(); it++)
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{
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auto tileProvider = it->get();
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// Get the texture that should be used for rendering
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TileAndTransform tileAndTransform = TileSelector::getHighestResolutionTile(tileProvider, chunkIndex);
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if (tileAndTransform.tile.status == Tile::Status::Unavailable) {
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// don't render if no tile was available
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programObject->deactivate();
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return nullptr;
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}
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activateTileAndSetTileUniforms(
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programUniformHandler,
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LayeredTextures::TextureCategory(category),
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LayeredTextureShaderUniformIdHandler::BlendLayerSuffix::none,
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i,
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texUnits[category][i].blendTexture0,
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tileAndTransform);
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// If blending is enabled, two more textures are needed
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if (layeredTexturePreprocessingData.layeredTextureInfo[category].layerBlendingEnabled) {
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TileAndTransform tileAndTransformParent1 = TileSelector::getHighestResolutionTile(tileProvider, chunkIndex, 1);
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if (tileAndTransformParent1.tile.status == Tile::Status::Unavailable) {
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tileAndTransformParent1 = tileAndTransform;
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}
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activateTileAndSetTileUniforms(
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programUniformHandler,
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LayeredTextures::TextureCategory(category),
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LayeredTextureShaderUniformIdHandler::BlendLayerSuffix::Parent1,
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i,
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texUnits[category][i].blendTexture1,
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tileAndTransformParent1);
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TileAndTransform tileAndTransformParent2 = TileSelector::getHighestResolutionTile(tileProvider, chunkIndex, 2);
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if (tileAndTransformParent2.tile.status == Tile::Status::Unavailable) {
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tileAndTransformParent2 = tileAndTransformParent1;
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}
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activateTileAndSetTileUniforms(
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programUniformHandler,
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LayeredTextures::TextureCategory(category),
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LayeredTextureShaderUniformIdHandler::BlendLayerSuffix::Parent2,
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i,
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texUnits[category][i].blendTexture2,
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tileAndTransformParent2);
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}
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i++;
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}
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}
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// Go through all the height maps and set depth tranforms
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int i = 0;
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for (auto it = tileProviders[LayeredTextures::HeightMaps].begin();
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it != tileProviders[LayeredTextures::HeightMaps].end(); it++) {
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auto tileProvider = *it;
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TileDepthTransform depthTransform = tileProvider->depthTransform();
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setDepthTransformUniforms(
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programUniformHandler,
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LayeredTextures::TextureCategory::HeightMaps,
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LayeredTextureShaderUniformIdHandler::BlendLayerSuffix::none,
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i,
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depthTransform);
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i++;
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}
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// The length of the skirts is proportional to its size
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programObject->setUniform("skirtLength", min(static_cast<float>(chunk.surfacePatch().halfSize().lat * 1000000), 8700.0f));
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programObject->setUniform("xSegments", _grid->xSegments());
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return programObject;
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}
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void ChunkRenderer::renderChunkGlobally(const Chunk& chunk, const RenderData& data){
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ProgramObject* programObject = getActivatedProgramWithTileData(
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_globalRenderingShaderProvider.get(),
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_globalProgramUniformHandler,
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chunk);
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if (programObject == nullptr) {
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return;
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}
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const Ellipsoid& ellipsoid = chunk.owner()->ellipsoid();
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bool performAnyBlending = false;
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auto& categoriesBlendingEnabled = chunk.owner()->blendProperties;
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for (int i = 0; i < categoriesBlendingEnabled.size(); ++i) {
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LayeredTextures::TextureCategory category = (LayeredTextures::TextureCategory)i;
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if(categoriesBlendingEnabled[category] && _tileProviderManager->getActivatedLayerCategory(category).size() > 0){
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performAnyBlending = true;
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break;
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}
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}
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if(performAnyBlending) {
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float distanceScaleFactor = chunk.owner()->lodScaleFactor * ellipsoid.minimumRadius();
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programObject->setUniform("cameraPosition", vec3(data.camera.positionVec3()));
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programObject->setUniform("distanceScaleFactor", distanceScaleFactor);
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programObject->setUniform("chunkLevel", chunk.index().level);
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}
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// Calculate other uniform variables needed for rendering
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Geodetic2 swCorner = chunk.surfacePatch().getCorner(Quad::SOUTH_WEST);
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auto patchSize = chunk.surfacePatch().size();
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// TODO : Model transform should be fetched as a matrix directly.
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dmat4 modelTransform = dmat4(chunk.owner()->stateMatrix()); // Rotation
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modelTransform = translate(dmat4(1), data.position.dvec3()) * modelTransform; // Translation
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dmat4 viewTransform = data.camera.combinedViewMatrix();
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mat4 modelViewTransform = mat4(viewTransform * modelTransform);
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mat4 modelViewProjectionTransform = data.camera.projectionMatrix() * modelViewTransform;
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// Upload the uniform variables
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programObject->setUniform("modelViewProjectionTransform", modelViewProjectionTransform);
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programObject->setUniform("minLatLon", vec2(swCorner.toLonLatVec2()));
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programObject->setUniform("lonLatScalingFactor", vec2(patchSize.toLonLatVec2()));
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programObject->setUniform("radiiSquared", vec3(ellipsoid.radiiSquared()));
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if (_tileProviderManager->getActivatedLayerCategory(LayeredTextures::NightTextures).size() > 0) {
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programObject->setUniform("modelViewTransform", modelViewTransform);
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}
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// OpenGL rendering settings
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE);
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glCullFace(GL_BACK);
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// render
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_grid->geometry().drawUsingActiveProgram();
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// disable shader
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programObject->deactivate();
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}
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void ChunkRenderer::renderChunkLocally(const Chunk& chunk, const RenderData& data) {
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ProgramObject* programObject = getActivatedProgramWithTileData(
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_localRenderingShaderProvider.get(),
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_localProgramUniformHandler,
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chunk);
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if (programObject == nullptr) {
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return;
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}
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using namespace glm;
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const Ellipsoid& ellipsoid = chunk.owner()->ellipsoid();
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bool performAnyBlending = false;
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auto& categoriesBlendingEnabled = chunk.owner()->blendProperties;
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for (int i = 0; i < categoriesBlendingEnabled.size(); ++i) {
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LayeredTextures::TextureCategory category = (LayeredTextures::TextureCategory)i;
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if (categoriesBlendingEnabled[category] && _tileProviderManager->getActivatedLayerCategory(category).size() > 0) {
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performAnyBlending = true;
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break;
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}
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}
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if (performAnyBlending) {
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float distanceScaleFactor = chunk.owner()->lodScaleFactor * chunk.owner()->ellipsoid().minimumRadius();
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programObject->setUniform("distanceScaleFactor", distanceScaleFactor);
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programObject->setUniform("chunkLevel", chunk.index().level);
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}
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// Calculate other uniform variables needed for rendering
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// TODO : Model transform should be fetched as a matrix directly.
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dmat4 modelTransform = translate(dmat4(1), data.position.dvec3());
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dmat4 viewTransform = data.camera.combinedViewMatrix();
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dmat4 modelViewTransform = viewTransform * modelTransform;
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std::vector<std::string> cornerNames = { "p01", "p11", "p00", "p10" };
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std::vector<Vec3> cornersCameraSpace(4);
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for (int i = 0; i < 4; ++i) {
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Quad q = (Quad)i;
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Geodetic2 corner = chunk.surfacePatch().getCorner(q);
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Vec3 cornerModelSpace = ellipsoid.cartesianSurfacePosition(corner);
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Vec3 cornerCameraSpace = Vec3(dmat4(modelViewTransform) * glm::dvec4(cornerModelSpace, 1));
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cornersCameraSpace[i] = cornerCameraSpace;
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programObject->setUniform(cornerNames[i], vec3(cornerCameraSpace));
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}
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vec3 patchNormalCameraSpace = normalize(
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cross(cornersCameraSpace[Quad::SOUTH_EAST] - cornersCameraSpace[Quad::SOUTH_WEST],
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cornersCameraSpace[Quad::NORTH_EAST] - cornersCameraSpace[Quad::SOUTH_WEST]));
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programObject->setUniform("patchNormalCameraSpace", patchNormalCameraSpace);
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programObject->setUniform("projectionTransform", data.camera.projectionMatrix());
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// OpenGL rendering settings
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE);
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glCullFace(GL_BACK);
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// render
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_grid->geometry().drawUsingActiveProgram();
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// disable shader
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programObject->deactivate();
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}
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} // namespace openspace
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