mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-01-08 12:39:49 -06:00
500 lines
22 KiB
C++
500 lines
22 KiB
C++
/*****************************************************************************************
|
|
* *
|
|
* OpenSpace *
|
|
* *
|
|
* Copyright (c) 2014-2016 *
|
|
* *
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
|
|
* software and associated documentation files (the "Software"), to deal in the Software *
|
|
* without restriction, including without limitation the rights to use, copy, modify, *
|
|
* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
|
|
* permit persons to whom the Software is furnished to do so, subject to the following *
|
|
* conditions: *
|
|
* *
|
|
* The above copyright notice and this permission notice shall be included in all copies *
|
|
* or substantial portions of the Software. *
|
|
* *
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
|
|
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
|
|
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
|
|
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
|
|
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
|
|
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
|
|
****************************************************************************************/
|
|
|
|
|
|
#include <modules/globebrowsing/chunk/chunkrenderer.h>
|
|
#include <modules/globebrowsing/globes/chunkedlodglobe.h>
|
|
#include <modules/globebrowsing/globes/renderableglobe.h>
|
|
#include <modules/globebrowsing/layered_rendering/layeredtextures.h>
|
|
#include <modules/globebrowsing/tile/layermanager.h>
|
|
|
|
// open space includes
|
|
#include <openspace/engine/wrapper/windowwrapper.h>
|
|
#include <openspace/engine/openspaceengine.h>
|
|
#include <openspace/rendering/renderengine.h>
|
|
|
|
// ghoul includes
|
|
#include <ghoul/misc/assert.h>
|
|
#include <ghoul/opengl/texture.h>
|
|
#include <ghoul/opengl/textureunit.h>
|
|
|
|
// STL includes
|
|
#include <sstream>
|
|
|
|
#define _USE_MATH_DEFINES
|
|
#include <math.h>
|
|
|
|
namespace {
|
|
const std::string _loggerCat = "ChunkRenderer";
|
|
|
|
const std::string keyFrame = "Frame";
|
|
const std::string keyGeometry = "Geometry";
|
|
const std::string keyShading = "PerformShading";
|
|
|
|
const std::string keyBody = "Body";
|
|
}
|
|
|
|
namespace openspace {
|
|
namespace globebrowsing {
|
|
|
|
ChunkRenderer::ChunkRenderer(
|
|
std::shared_ptr<Grid> grid,
|
|
std::shared_ptr<LayerManager> layerManager)
|
|
: _layerManager(layerManager)
|
|
, _grid(grid)
|
|
{
|
|
_globalRenderingShaderProvider = std::make_shared<LayeredTextureShaderProvider>(
|
|
"GlobalChunkedLodPatch",
|
|
"${MODULE_GLOBEBROWSING}/shaders/globalchunkedlodpatch_vs.glsl",
|
|
"${MODULE_GLOBEBROWSING}/shaders/globalchunkedlodpatch_fs.glsl");
|
|
|
|
_localRenderingShaderProvider = std::make_shared<LayeredTextureShaderProvider>(
|
|
"LocalChunkedLodPatch",
|
|
"${MODULE_GLOBEBROWSING}/shaders/localchunkedlodpatch_vs.glsl",
|
|
"${MODULE_GLOBEBROWSING}/shaders/localchunkedlodpatch_fs.glsl");
|
|
|
|
_globalProgramUniformHandler =
|
|
std::make_shared<LayeredTextureShaderUniformIdHandler>();
|
|
_localProgramUniformHandler =
|
|
std::make_shared<LayeredTextureShaderUniformIdHandler>();
|
|
|
|
}
|
|
|
|
void ChunkRenderer::renderChunk(const Chunk& chunk, const RenderData& data) {
|
|
// A little arbitrary but it works
|
|
if (chunk.tileIndex().level < 10) {
|
|
renderChunkGlobally(chunk, data);
|
|
}
|
|
else {
|
|
renderChunkLocally(chunk, data);
|
|
}
|
|
}
|
|
|
|
void ChunkRenderer::update() {
|
|
// unused atm. Could be used for caching or precalculating
|
|
}
|
|
|
|
void ChunkRenderer::setDepthTransformUniforms(
|
|
std::shared_ptr<LayeredTextureShaderUniformIdHandler> uniformIdHandler,
|
|
LayeredTextures::TextureCategory textureCategory,
|
|
LayeredTextures::BlendLayerSuffixes blendLayerSuffix,
|
|
size_t layerIndex,
|
|
const TileDepthTransform& tileDepthTransform)
|
|
{
|
|
uniformIdHandler->programObject().setUniform(
|
|
uniformIdHandler->getId(
|
|
textureCategory,
|
|
blendLayerSuffix,
|
|
layerIndex,
|
|
LayeredTextures::GlslTileDataId::depthTransform_depthScale),
|
|
tileDepthTransform.depthScale);
|
|
|
|
uniformIdHandler->programObject().setUniform(
|
|
uniformIdHandler->getId(
|
|
textureCategory,
|
|
blendLayerSuffix,
|
|
layerIndex,
|
|
LayeredTextures::GlslTileDataId::depthTransform_depthOffset),
|
|
tileDepthTransform.depthOffset);
|
|
|
|
}
|
|
|
|
void ChunkRenderer::activateTileAndSetTileUniforms(
|
|
std::shared_ptr<LayeredTextureShaderUniformIdHandler> uniformIdHandler,
|
|
LayeredTextures::TextureCategory textureCategory,
|
|
LayeredTextures::BlendLayerSuffixes blendLayerSuffix,
|
|
size_t layerIndex,
|
|
ghoul::opengl::TextureUnit& texUnit,
|
|
const ChunkTile& chunkTile)
|
|
{
|
|
// Blend tile with two parents
|
|
// The texture needs a unit to sample from
|
|
texUnit.activate();
|
|
chunkTile.tile.texture->bind();
|
|
|
|
uniformIdHandler->programObject().setUniform(
|
|
uniformIdHandler->getId(
|
|
textureCategory,
|
|
blendLayerSuffix,
|
|
layerIndex,
|
|
LayeredTextures::GlslTileDataId::textureSampler),
|
|
texUnit);
|
|
uniformIdHandler->programObject().setUniform(
|
|
uniformIdHandler->getId(
|
|
textureCategory,
|
|
blendLayerSuffix,
|
|
layerIndex,
|
|
LayeredTextures::GlslTileDataId::uvTransform_uvScale),
|
|
chunkTile.uvTransform.uvScale);
|
|
uniformIdHandler->programObject().setUniform(
|
|
uniformIdHandler->getId(
|
|
textureCategory,
|
|
blendLayerSuffix,
|
|
layerIndex,
|
|
LayeredTextures::GlslTileDataId::uvTransform_uvOffset),
|
|
chunkTile.uvTransform.uvOffset);
|
|
}
|
|
|
|
void ChunkRenderer::setLayerSettingsUniforms(
|
|
std::shared_ptr<LayeredTextureShaderUniformIdHandler> uniformIdHandler,
|
|
LayeredTextures::TextureCategory textureCategory,
|
|
size_t layerIndex,
|
|
PerLayerSettings settings) {
|
|
|
|
for (int i = 0; i < settings.array().size(); i++) {
|
|
settings.array()[i]->uploadUniform(
|
|
uniformIdHandler->programObject(),
|
|
uniformIdHandler->getSettingsId(
|
|
textureCategory,
|
|
layerIndex,
|
|
LayeredTextures::LayerSettingsIds(i)));
|
|
}
|
|
}
|
|
|
|
ProgramObject* ChunkRenderer::getActivatedProgramWithTileData(
|
|
LayeredTextureShaderProvider* layeredTextureShaderProvider,
|
|
std::shared_ptr<LayeredTextureShaderUniformIdHandler> programUniformHandler,
|
|
const Chunk& chunk)
|
|
{
|
|
const TileIndex& tileIndex = chunk.tileIndex();
|
|
|
|
LayeredTexturePreprocessingData layeredTexturePreprocessingData;
|
|
|
|
for (size_t category = 0;
|
|
category < LayeredTextures::NUM_TEXTURE_CATEGORIES;
|
|
category++) {
|
|
|
|
LayeredTextureInfo layeredTextureInfo;
|
|
auto layerGroup = _layerManager->layerGroup(category);
|
|
layeredTextureInfo.lastLayerIdx = layerGroup.activeLayers().size() - 1;
|
|
layeredTextureInfo.layerBlendingEnabled = layerGroup.levelBlendingEnabled;
|
|
|
|
layeredTexturePreprocessingData.layeredTextureInfo[category] = layeredTextureInfo;
|
|
}
|
|
|
|
layeredTexturePreprocessingData.keyValuePairs.push_back(
|
|
std::pair<std::string, std::string>(
|
|
"useAtmosphere",
|
|
std::to_string(chunk.owner().generalProperties().atmosphereEnabled)));
|
|
layeredTexturePreprocessingData.keyValuePairs.push_back(
|
|
std::pair<std::string, std::string>(
|
|
"performShading",
|
|
std::to_string(chunk.owner().generalProperties().performShading)));
|
|
|
|
layeredTexturePreprocessingData.keyValuePairs.push_back(
|
|
std::pair<std::string, std::string>(
|
|
"showChunkEdges",
|
|
std::to_string(chunk.owner().debugProperties().showChunkEdges)));
|
|
|
|
|
|
layeredTexturePreprocessingData.keyValuePairs.push_back(
|
|
std::pair<std::string, std::string>(
|
|
"showHeightResolution",
|
|
std::to_string(chunk.owner().debugProperties().showHeightResolution)));
|
|
|
|
layeredTexturePreprocessingData.keyValuePairs.push_back(
|
|
std::pair<std::string, std::string>(
|
|
"showHeightIntensities",
|
|
std::to_string(chunk.owner().debugProperties().showHeightIntensities)));
|
|
|
|
layeredTexturePreprocessingData.keyValuePairs.push_back(
|
|
std::pair<std::string, std::string>(
|
|
"defaultHeight",
|
|
std::to_string(Chunk::DEFAULT_HEIGHT)));
|
|
|
|
// Now the shader program can be accessed
|
|
ProgramObject* programObject =
|
|
layeredTextureShaderProvider->getUpdatedShaderProgram(
|
|
layeredTexturePreprocessingData);
|
|
|
|
programUniformHandler->updateIdsIfNecessary(layeredTextureShaderProvider);
|
|
|
|
// Activate the shader program
|
|
programObject->activate();
|
|
|
|
// Initialize all texture units
|
|
struct BlendTexUnits {
|
|
ghoul::opengl::TextureUnit blendTexture0;
|
|
ghoul::opengl::TextureUnit blendTexture1;
|
|
ghoul::opengl::TextureUnit blendTexture2;
|
|
};
|
|
std::array<std::vector<BlendTexUnits>, LayeredTextures::NUM_TEXTURE_CATEGORIES> texUnits;
|
|
for (size_t category = 0; category < LayeredTextures::NUM_TEXTURE_CATEGORIES; category++) {
|
|
size_t activeLayers = _layerManager->layerGroup(category).activeLayers().size();
|
|
texUnits[category].resize(activeLayers);
|
|
}
|
|
|
|
// Go through all the categories
|
|
for (size_t category = 0; category < LayeredTextures::NUM_TEXTURE_CATEGORIES; category++) {
|
|
// Go through all the providers in this category
|
|
int i = 0;
|
|
for (const Layer& layer : _layerManager->layerGroup(category).activeLayers()) {
|
|
TileProvider* tileProvider = layer.tileProvider.get();
|
|
// Get the texture that should be used for rendering
|
|
ChunkTile chunkTile = TileSelector::getHighestResolutionTile(tileProvider, tileIndex);
|
|
if (chunkTile.tile.status == Tile::Status::Unavailable) {
|
|
chunkTile.tile = tileProvider->getDefaultTile();
|
|
chunkTile.uvTransform.uvOffset = { 0, 0 };
|
|
chunkTile.uvTransform.uvScale = { 1, 1 };
|
|
}
|
|
|
|
activateTileAndSetTileUniforms(
|
|
programUniformHandler,
|
|
LayeredTextures::TextureCategory(category),
|
|
LayeredTextures::BlendLayerSuffixes::none,
|
|
i,
|
|
texUnits[category][i].blendTexture0,
|
|
chunkTile);
|
|
|
|
// If blending is enabled, two more textures are needed
|
|
if (layeredTexturePreprocessingData.layeredTextureInfo[category].layerBlendingEnabled) {
|
|
ChunkTile chunkTileParent1 = TileSelector::getHighestResolutionTile(tileProvider, tileIndex, 1);
|
|
if (chunkTileParent1.tile.status == Tile::Status::Unavailable) {
|
|
chunkTileParent1 = chunkTile;
|
|
}
|
|
activateTileAndSetTileUniforms(
|
|
programUniformHandler,
|
|
LayeredTextures::TextureCategory(category),
|
|
LayeredTextures::BlendLayerSuffixes::Parent1,
|
|
i,
|
|
texUnits[category][i].blendTexture1,
|
|
chunkTileParent1);
|
|
|
|
ChunkTile chunkTileParent2 = TileSelector::getHighestResolutionTile(tileProvider, tileIndex, 2);
|
|
if (chunkTileParent2.tile.status == Tile::Status::Unavailable) {
|
|
chunkTileParent2 = chunkTileParent1;
|
|
}
|
|
activateTileAndSetTileUniforms(
|
|
programUniformHandler,
|
|
LayeredTextures::TextureCategory(category),
|
|
LayeredTextures::BlendLayerSuffixes::Parent2,
|
|
i,
|
|
texUnits[category][i].blendTexture2,
|
|
chunkTileParent2);
|
|
}
|
|
|
|
setLayerSettingsUniforms(
|
|
programUniformHandler,
|
|
LayeredTextures::TextureCategory(category),
|
|
i,
|
|
layer.settings);
|
|
|
|
/*
|
|
if (category == LayeredTextures::HeightMaps && chunkTile.tile.preprocessData) {
|
|
//auto preprocessingData = chunkTile.tile.preprocessData;
|
|
//float noDataValue = preprocessingData->noDataValues[0];
|
|
programObject->setUniform(
|
|
"minimumValidHeight[" + std::to_string(i) + "]",
|
|
-100000);
|
|
}
|
|
*/
|
|
i++;
|
|
}
|
|
}
|
|
|
|
// Go through all the height maps and set depth tranforms
|
|
int i = 0;
|
|
const auto& heightLayers = _layerManager->layerGroup(LayeredTextures::HeightMaps).activeLayers();
|
|
|
|
for (const Layer& heightLayer : heightLayers) {
|
|
TileDepthTransform depthTransform = heightLayer.tileProvider->depthTransform();
|
|
setDepthTransformUniforms(
|
|
programUniformHandler,
|
|
LayeredTextures::TextureCategory::HeightMaps,
|
|
LayeredTextures::BlendLayerSuffixes::none,
|
|
i,
|
|
depthTransform);
|
|
i++;
|
|
}
|
|
|
|
// The length of the skirts is proportional to its size
|
|
programObject->setUniform("skirtLength", min(static_cast<float>(chunk.surfacePatch().halfSize().lat * 1000000), 8700.0f));
|
|
programObject->setUniform("xSegments", _grid->xSegments());
|
|
|
|
if (chunk.owner().debugProperties().showHeightResolution) {
|
|
programObject->setUniform("vertexResolution", glm::vec2(_grid->xSegments(), _grid->ySegments()));
|
|
}
|
|
|
|
return programObject;
|
|
}
|
|
|
|
void ChunkRenderer::renderChunkGlobally(const Chunk& chunk, const RenderData& data){
|
|
|
|
ProgramObject* programObject = getActivatedProgramWithTileData(
|
|
_globalRenderingShaderProvider.get(),
|
|
_globalProgramUniformHandler,
|
|
chunk);
|
|
if (programObject == nullptr) {
|
|
return;
|
|
}
|
|
|
|
const Ellipsoid& ellipsoid = chunk.owner().ellipsoid();
|
|
|
|
bool performAnyBlending = false;
|
|
|
|
|
|
for (int i = 0; i < LayeredTextures::NUM_TEXTURE_CATEGORIES; ++i) {
|
|
const LayerGroup& layerGroup = _layerManager->layerGroup(i);
|
|
if(layerGroup.levelBlendingEnabled && layerGroup.activeLayers().size() > 0){
|
|
performAnyBlending = true;
|
|
break;
|
|
}
|
|
}
|
|
if (performAnyBlending) {
|
|
// Calculations are done in the reference frame of the globe. Hence, the camera
|
|
// position needs to be transformed with the inverse model matrix
|
|
glm::dmat4 inverseModelTransform = chunk.owner().inverseModelTransform();
|
|
glm::dvec3 cameraPosition =
|
|
glm::dvec3(inverseModelTransform * glm::dvec4(data.camera.positionVec3(), 1));
|
|
float distanceScaleFactor = chunk.owner().generalProperties().lodScaleFactor * ellipsoid.minimumRadius();
|
|
programObject->setUniform("cameraPosition", vec3(cameraPosition));
|
|
programObject->setUniform("distanceScaleFactor", distanceScaleFactor);
|
|
programObject->setUniform("chunkLevel", chunk.tileIndex().level);
|
|
}
|
|
|
|
// Calculate other uniform variables needed for rendering
|
|
Geodetic2 swCorner = chunk.surfacePatch().getCorner(Quad::SOUTH_WEST);
|
|
auto patchSize = chunk.surfacePatch().size();
|
|
|
|
dmat4 modelTransform = chunk.owner().modelTransform();
|
|
dmat4 viewTransform = data.camera.combinedViewMatrix();
|
|
mat4 modelViewTransform = mat4(viewTransform * modelTransform);
|
|
mat4 modelViewProjectionTransform = data.camera.projectionMatrix() * modelViewTransform;
|
|
|
|
// Upload the uniform variables
|
|
programObject->setUniform("modelViewProjectionTransform", modelViewProjectionTransform);
|
|
programObject->setUniform("minLatLon", vec2(swCorner.toLonLatVec2()));
|
|
programObject->setUniform("lonLatScalingFactor", vec2(patchSize.toLonLatVec2()));
|
|
programObject->setUniform("radiiSquared", vec3(ellipsoid.radiiSquared()));
|
|
|
|
if (_layerManager->layerGroup(
|
|
LayeredTextures::NightTextures).activeLayers().size() > 0 ||
|
|
_layerManager->layerGroup(
|
|
LayeredTextures::WaterMasks).activeLayers().size() > 0 ||
|
|
chunk.owner().generalProperties().atmosphereEnabled ||
|
|
chunk.owner().generalProperties().performShading) {
|
|
glm::vec3 directionToSunWorldSpace =
|
|
glm::normalize(-data.modelTransform.translation);
|
|
glm::vec3 directionToSunCameraSpace =
|
|
(viewTransform * glm::dvec4(directionToSunWorldSpace, 0));
|
|
data.modelTransform.translation;
|
|
programObject->setUniform("modelViewTransform", modelViewTransform);
|
|
programObject->setUniform("lightDirectionCameraSpace", -directionToSunCameraSpace);
|
|
}
|
|
|
|
// OpenGL rendering settings
|
|
glEnable(GL_DEPTH_TEST);
|
|
glEnable(GL_CULL_FACE);
|
|
glCullFace(GL_BACK);
|
|
|
|
// render
|
|
_grid->geometry().drawUsingActiveProgram();
|
|
|
|
// disable shader
|
|
programObject->deactivate();
|
|
}
|
|
|
|
|
|
|
|
void ChunkRenderer::renderChunkLocally(const Chunk& chunk, const RenderData& data) {
|
|
|
|
ProgramObject* programObject = getActivatedProgramWithTileData(
|
|
_localRenderingShaderProvider.get(),
|
|
_localProgramUniformHandler,
|
|
chunk);
|
|
if (programObject == nullptr) {
|
|
return;
|
|
}
|
|
|
|
using namespace glm;
|
|
|
|
const Ellipsoid& ellipsoid = chunk.owner().ellipsoid();
|
|
|
|
|
|
bool performAnyBlending = false;
|
|
for (int i = 0; i < LayeredTextures::NUM_TEXTURE_CATEGORIES; ++i) {
|
|
LayeredTextures::TextureCategory category = (LayeredTextures::TextureCategory)i;
|
|
if (_layerManager->layerGroup(i).levelBlendingEnabled && _layerManager->layerGroup(category).activeLayers().size() > 0) {
|
|
performAnyBlending = true;
|
|
break;
|
|
}
|
|
}
|
|
if (performAnyBlending) {
|
|
float distanceScaleFactor = chunk.owner().generalProperties().lodScaleFactor * chunk.owner().ellipsoid().minimumRadius();
|
|
programObject->setUniform("distanceScaleFactor", distanceScaleFactor);
|
|
programObject->setUniform("chunkLevel", chunk.tileIndex().level);
|
|
}
|
|
|
|
// Calculate other uniform variables needed for rendering
|
|
dmat4 modelTransform = chunk.owner().modelTransform();
|
|
dmat4 viewTransform = data.camera.combinedViewMatrix();
|
|
dmat4 modelViewTransform = viewTransform * modelTransform;
|
|
|
|
std::vector<std::string> cornerNames = { "p01", "p11", "p00", "p10" };
|
|
std::vector<Vec3> cornersCameraSpace(4);
|
|
for (int i = 0; i < 4; ++i) {
|
|
Quad q = (Quad)i;
|
|
Geodetic2 corner = chunk.surfacePatch().getCorner(q);
|
|
Vec3 cornerModelSpace = ellipsoid.cartesianSurfacePosition(corner);
|
|
Vec3 cornerCameraSpace = Vec3(dmat4(modelViewTransform) * glm::dvec4(cornerModelSpace, 1));
|
|
cornersCameraSpace[i] = cornerCameraSpace;
|
|
programObject->setUniform(cornerNames[i], vec3(cornerCameraSpace));
|
|
}
|
|
|
|
vec3 patchNormalCameraSpace = normalize(
|
|
cross(cornersCameraSpace[Quad::SOUTH_EAST] - cornersCameraSpace[Quad::SOUTH_WEST],
|
|
cornersCameraSpace[Quad::NORTH_EAST] - cornersCameraSpace[Quad::SOUTH_WEST]));
|
|
|
|
programObject->setUniform("patchNormalCameraSpace", patchNormalCameraSpace);
|
|
programObject->setUniform("projectionTransform", data.camera.projectionMatrix());
|
|
|
|
if (_layerManager->layerGroup(
|
|
LayeredTextures::NightTextures).activeLayers().size() > 0 ||
|
|
_layerManager->layerGroup(
|
|
LayeredTextures::WaterMasks).activeLayers().size() > 0 ||
|
|
chunk.owner().generalProperties().atmosphereEnabled ||
|
|
chunk.owner().generalProperties().performShading) {
|
|
glm::vec3 directionToSunWorldSpace =
|
|
glm::normalize(-data.modelTransform.translation);
|
|
glm::vec3 directionToSunCameraSpace =
|
|
(viewTransform * glm::dvec4(directionToSunWorldSpace, 0));
|
|
data.modelTransform.translation;
|
|
programObject->setUniform("lightDirectionCameraSpace", -directionToSunCameraSpace);
|
|
}
|
|
|
|
|
|
// OpenGL rendering settings
|
|
glEnable(GL_DEPTH_TEST);
|
|
glEnable(GL_CULL_FACE);
|
|
glCullFace(GL_BACK);
|
|
|
|
// render
|
|
_grid->geometry().drawUsingActiveProgram();
|
|
|
|
// disable shader
|
|
programObject->deactivate();
|
|
}
|
|
} // namespace globebrowsing
|
|
} // namespace openspace
|