mirror of
https://github.com/OpenSpace/OpenSpace.git
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220 lines
9.0 KiB
C++
220 lines
9.0 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/rendering/patchrenderer.h>
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#include <modules/globebrowsing/rendering/clipmapgeometry.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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#define _USE_MATH_DEFINES
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#include <math.h>
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namespace {
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const std::string _loggerCat = "LatLonPatch";
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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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//////////////////////////////////////////////////////////////////////////////////////
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// PATCH RENDERER //
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//////////////////////////////////////////////////////////////////////////////////////
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PatchRenderer::PatchRenderer(shared_ptr<Geometry> geometry)
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: _geometry(geometry)
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{
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}
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PatchRenderer::~PatchRenderer() {
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if (_programObject) {
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RenderEngine& renderEngine = OsEng.renderEngine();
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renderEngine.removeRenderProgram(_programObject);
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_programObject = nullptr;
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}
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}
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void PatchRenderer::setFrustrumCuller(std::shared_ptr<FrustrumCuller> fc) {
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_frustrumCuller = fc;
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}
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//////////////////////////////////////////////////////////////////////////////////////
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// LATLON PATCH RENDERER //
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//////////////////////////////////////////////////////////////////////////////////////
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LatLonPatchRenderer::LatLonPatchRenderer(shared_ptr<Geometry> geometry)
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: PatchRenderer(geometry)
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{
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_programObject = OsEng.renderEngine().buildRenderProgram(
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"LatLonSphereMappingProgram",
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"${MODULE_GLOBEBROWSING}/shaders/latlonpatch_spheremapping_vs.glsl",
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"${MODULE_GLOBEBROWSING}/shaders/simple_fs.glsl");
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ghoul_assert(_programObject != nullptr, "Failed to initialize programObject!");
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using IgnoreError = ghoul::opengl::ProgramObject::IgnoreError;
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_programObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
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}
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void LatLonPatchRenderer::renderPatch(
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const LatLonPatch& patch, const RenderData& data, double radius)
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{
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// activate shader
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_programObject->activate();
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using namespace glm;
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// Get camera transform matrix
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// TODO : Should only need to fetch the camera transform and use directly
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// but this is not currently possible in the camera class.
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vec3 cameraPosition = data.camera.unsynchedPosition().vec3();
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mat4 viewTransform = inverse(translate(mat4(1.0), cameraPosition));
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viewTransform = mat4(data.camera.viewRotationMatrix()) * viewTransform;
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// TODO : Model transform should be fetched as a matrix directly.
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mat4 modelTransform = translate(mat4(1), data.position.vec3());
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mat4 modelViewProjectionTransform = data.camera.projectionMatrix()
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* viewTransform * modelTransform;
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// View frustrum culling
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if (_frustrumCuller != nullptr) {
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//LatLon center = patch.center;
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//vec3 centerPoint = radius * center.asUnitCartesian();
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if (!_frustrumCuller->isVisible(patch, radius, modelViewProjectionTransform)) {
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// dont render the patch
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return;
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}
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}
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// Get the textures that should be used for rendering
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glm::ivec3 tileIndex = tileSet.getTileIndex(patch);
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LatLonPatch tilePatch = tileSet.getTilePositionAndScale(tileIndex);
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TextureTile tile00 = tileSet.getTile(tileIndex);
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// Upload the tile to the GPU (a lot of caching things should be done)
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LatLon swCorner = patch.southWestCorner();
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_programObject->setUniform("modelViewProjectionTransform", modelViewProjectionTransform);
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_programObject->setUniform("minLatLon", vec2(swCorner.lat, swCorner.lon));
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_programObject->setUniform("latLonScalingFactor", 2.0f * vec2(patch.halfSize.asVec2()));
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_programObject->setUniform("globeRadius", float(radius));
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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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_geometry->drawUsingActiveProgram();
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// disable shader
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_programObject->deactivate();
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}
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//////////////////////////////////////////////////////////////////////////////////////
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// CLIPMAP PATCH RENDERER //
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//////////////////////////////////////////////////////////////////////////////////////
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ClipMapPatchRenderer::ClipMapPatchRenderer()
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: PatchRenderer(shared_ptr<ClipMapGeometry>(new ClipMapGeometry(32)))
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{
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_programObject = OsEng.renderEngine().buildRenderProgram(
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"LatLonSphereMappingProgram",
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"${MODULE_GLOBEBROWSING}/shaders/clipmappatch_spheremapping_vs.glsl",
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"${MODULE_GLOBEBROWSING}/shaders/simple_fs.glsl");
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ghoul_assert(_programObject != nullptr, "Failed to initialize programObject!");
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using IgnoreError = ghoul::opengl::ProgramObject::IgnoreError;
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_programObject->setIgnoreSubroutineUniformLocationError(IgnoreError::Yes);
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}
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void ClipMapPatchRenderer::renderPatch(
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const LatLonPatch& patch, const RenderData& data, double radius)
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{
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// activate shader
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_programObject->activate();
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using namespace glm;
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Vec3 cameraPos = data.camera.position().dvec3();
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// Get camera transform matrix
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// TODO : Should only need to fetch the camera transform and use directly
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// but this is not currently possible in the camera class.
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vec3 cameraPosition = data.camera.position().vec3();
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mat4 viewTransform = inverse(translate(mat4(1.0), cameraPosition));
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viewTransform = mat4(data.camera.viewRotationMatrix()) * viewTransform;
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// TODO : Model transform should be fetched as a matrix directly.
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mat4 modelTransform = translate(mat4(1), data.position.vec3());
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// Snap patch position
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int segmentsPerPatch = 32;
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LatLon stepSize = LatLon(
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patch.halfSize.lat * 2 / segmentsPerPatch,
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patch.halfSize.lon * 2 / segmentsPerPatch);
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ivec2 patchesToCoverGlobe = ivec2(
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M_PI / (patch.halfSize.lat * 2) + 0.5,
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M_PI * 2 / (patch.halfSize.lon * 2) + 0.5);
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ivec2 intSnapCoord = ivec2(
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patch.center.lat / (M_PI * 2) * segmentsPerPatch * patchesToCoverGlobe.y,
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patch.center.lon / (M_PI) * segmentsPerPatch * patchesToCoverGlobe.x);
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LatLon swCorner = LatLon(
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stepSize.lat * intSnapCoord.x - patch.halfSize.lat,
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stepSize.lon * intSnapCoord.y - patch.halfSize.lon);
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ivec2 contraction = ivec2(intSnapCoord.y % 2, intSnapCoord.x % 2);
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//LDEBUG("patch.center = [ " << patch.center.lat << " , " << patch.center.lon << " ]");
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//LDEBUG("intSnapCoord = [ " << intSnapCoord.x << " , " << intSnapCoord.y << " ]");
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//LDEBUG("contraction = [ " << contraction.x << " , " << contraction.y << " ]");
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_programObject->setUniform("modelViewProjectionTransform", data.camera.projectionMatrix() * viewTransform * modelTransform);
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_programObject->setUniform("minLatLon", vec2(swCorner.lat, swCorner.lon));
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_programObject->setUniform("latLonScalingFactor", 2.0f * vec2(patch.halfSize.lat, patch.halfSize.lon));
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_programObject->setUniform("globeRadius", float(radius));
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_programObject->setUniform("contraction", contraction);
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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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_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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