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/*
* Copyright (C) 2020, Inria
* GRAPHDECO research group, https://team.inria.fr/graphdeco
* All rights reserved.
*
* This software is free for non-commercial, research and evaluation use
* under the terms of the LICENSE.md file.
*
* For inquiries contact [email protected] and/or [email protected]
*/
# include "Config.hpp"
# include <core/assets/Resources.hpp>
# include <map>
# include "ULRV2Renderer.hpp"
#include "core/system/String.hpp"
namespace sibr {
ULRV2Renderer::ULRV2Renderer(const std::vector<InputCamera::Ptr> & cameras, const uint w, const uint h, const unsigned int maxCams, const std::string & fShader, const std::string & vShader, const bool facecull)
{
// Count how many cameras are active in the scene.
unsigned int numActiveCams = 0;
for (auto & cam : cameras) {
if (cam->isActive()) {
++numActiveCams;
}
}
_numCams = maxCams == 0 ? numActiveCams : std::min(maxCams, numActiveCams);
setupULRshader(fShader,vShader);
_depthRT.reset(new sibr::RenderTargetRGBA32F(w, h));
_doOccl = true;
_areMasksBinary = true;
_doInvertMasks = false;
_discardBlackPixels = true;
_shouldCull = facecull;
_epsilonOcclusion = 1e-2f;
_soft_visibility_threshold = 30.0f;
soft_visibility_maps = nullptr;
}
void ULRV2Renderer::setupULRshader(const std::string & fShader, const std::string & vShader)
{
std::cerr << "[ULRV2Renderer] Trying to initialize shaders for at most " << _numCams << " cameras." << std::endl;
/// \todo TODO SR: handle the case were we require more shader texture slots than we are allowed too.
/// Seems to be around 90 on Quadro K4200. We can either do multiple passes (fi 40 cams per pass),
/// or try to use texture arrays to avoid this problem.
/// If this happens to you, lower the maximum number of cameras picked by the ulr algo.
GLShader::Define::List defines;
defines.emplace_back("NUM_CAMS", _numCams);
_ulrShader.init("ULRV2",
sibr::loadFile(sibr::getShadersDirectory("") + "/" + vShader + ".vert"),
sibr::loadFile(sibr::getShadersDirectory("") + "/" + fShader + ".frag", defines));
_depthShader.init("ULRV2Depth",
sibr::loadFile(sibr::getShadersDirectory("ulr") + "/ulr_intersect.vert"),
sibr::loadFile(sibr::getShadersDirectory("ulr") + "/ulr_intersect.frag", defines));
_proj.init(_depthShader, "proj");
_ncamPos.init(_ulrShader, "ncam_pos");
_occTest.init(_ulrShader, "occ_test");
_areMasksBinaryGL.init(_ulrShader, "is_binary_mask");
_doInvertMasksGL.init(_ulrShader, "invert_mask");
_discardBlackPixelsGL.init(_ulrShader, "discard_black_pixels");
_doMask.init(_ulrShader, "doMasking");
_camCount.init(_ulrShader, "camsCount");
_use_soft_visibility.init(_ulrShader, "useSoftVisibility");
_soft_visibility_threshold.init(_ulrShader, "softVisibilityThreshold");
_epsilonOcclusion.init(_ulrShader, "epsilonOcclusion");
_icamProj.resize(_numCams);
_icamPos.resize(_numCams);
_icamDir.resize(_numCams);
_inputRGB.resize(_numCams);
_masks.resize(_numCams);
_selected_cams.resize(_numCams);
_ulrShader.begin();
for (uint i = 0; i<(uint)_numCams; i++)
{
_icamProj[i].init(_ulrShader, sibr::sprint("icam_proj[%d]", i));
_icamPos[i].init(_ulrShader, sibr::sprint("icam_pos[%d]", i));
_icamDir[i].init(_ulrShader, sibr::sprint("icam_dir[%d]", i));
_selected_cams[i].init(_ulrShader, sibr::sprint("selected_cams[%d]", i));
_inputRGB[i].init(_ulrShader, sibr::sprint("input_rgb[%d]", i));
_inputRGB[i].set(i + 2); // location 0 and 1 reserved.s
_masks[i].init(_ulrShader, sibr::sprint("masks[%d]", i));
_masks[i].set(GLuint(_numCams + i + 2));
}
_ulrShader.end();
}
void
ULRV2Renderer::process(const std::vector<uint>& imgs_ulr, const sibr::Camera& eye,
const sibr::BasicIBRScene::Ptr& scene,
std::shared_ptr<sibr::Mesh>& altMesh,
const std::vector<std::shared_ptr<RenderTargetRGBA32F> >& inputRTs,
IRenderTarget& dst)
{
// Get a new camera with z_near ~ 0
sibr::Camera new_cam = eye;
//new_cam.znear(0.001f);
glViewport(0, 0, _depthRT->w(), _depthRT->h());
_depthRT->bind();
glClearColor(0, 0, 0, 1);
glClearDepth(1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
_depthShader.begin();
_proj.set(new_cam.viewproj());
if (altMesh != nullptr) {
altMesh->render(true, _shouldCull); // enable depth test - disable back culling
} else {
scene->proxies()->proxy().render(true, _shouldCull);
}
_depthShader.end();
_depthRT->unbind();
glViewport(0, 0, dst.w(), dst.h());
dst.clear();
dst.bind();
_ulrShader.begin();
_ncamPos.set(eye.position());
_occTest.set(_doOccl);
_areMasksBinaryGL.set(_areMasksBinary);
_doInvertMasksGL.set(_doInvertMasks);
_discardBlackPixelsGL.set(_discardBlackPixels);
_doMask.set(useMasks());
_epsilonOcclusion.send();
CHECK_GL_ERROR
_use_soft_visibility.set(soft_visibility_maps != nullptr && soft_visibility_maps->handle());
CHECK_GL_ERROR
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, _depthRT->texture());
CHECK_GL_ERROR
if (_use_soft_visibility) {
//std::cout << "using soft visib" << std::endl;
_soft_visibility_threshold.send();
CHECK_GL_ERROR;
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D_ARRAY, soft_visibility_maps->handle());
CHECK_GL_ERROR;
}
CHECK_GL_ERROR;
int usedCamerasCount = 0;
for (int i = 0; i < std::min(imgs_ulr.size(), _numCams); ++i) {
if (!scene->cameras()->inputCameras()[imgs_ulr[i]]->isActive()) {
continue;
}
auto& cam = *scene->cameras()->inputCameras()[imgs_ulr[i]];
_icamPos[usedCamerasCount].set(cam.position());
_icamDir[usedCamerasCount].set(cam.dir());
_icamProj[usedCamerasCount].set(cam.viewproj());
_selected_cams[usedCamerasCount].set((int)imgs_ulr[i]);
glActiveTexture(GL_TEXTURE0 + usedCamerasCount + 2);
glBindTexture(GL_TEXTURE_2D, inputRTs[imgs_ulr[i]]->texture());
if (useMasks()) {
glActiveTexture(GL_TEXTURE0 + (int)_numCams + usedCamerasCount + 2);
glBindTexture(GL_TEXTURE_2D, getMasks()[imgs_ulr[i]]->texture());
}
++usedCamerasCount;
}
CHECK_GL_ERROR;
_camCount.set(usedCamerasCount);
CHECK_GL_ERROR;
//glDisable(GL_DEPTH_TEST);
RenderUtility::renderScreenQuad();
CHECK_GL_ERROR;
_ulrShader.end();
dst.unbind();
}
} /*namespace sibr*/
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