void DynamicMarchingTetrahedra::update(GLContext * gl) {
GLContext::Program * prog = gl->getProgram(m_sceneShader.c_str());
prog->use();
Vec3i numBlocks(64);
Vec3i threadBlockSize(4);
Vec3i gridSize = (numBlocks + threadBlockSize - 1) / threadBlockSize;
gl->setUniform(prog->getUniformLoc("cubeInfo"), m_cubeInfo);
gl->setUniform(prog->getUniformLoc("isPrefixSumPass"), true);
gl->setUniform(prog->getUniformLoc("numCubes"), numBlocks);
gl->setUniform(prog->getUniformLoc("sync1"), m_disp1);
gl->setUniform(prog->getUniformLoc("sync2"), m_disp2);
gl->setUniform(prog->getUniformLoc("sync3"), m_disp3);
gl->setUniform(prog->getUniformLoc("sync4"), m_disp4);
gl->setUniform(prog->getUniformLoc("maxTetrahedras"), 6);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 2, m_buffers[DMT_Buffer_Types::INDEX_BUFFER]);
glDispatchCompute(gridSize.x, gridSize.y, gridSize.z);
glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
GPUPrefixScan::scan(gl, m_buffers[DMT_Buffer_Types::INDEX_BUFFER], m_buffers[DMT_Buffer_Types::BLOCK_BUFFER], 100*100*100);
prog->use();
gl->setUniform(prog->getUniformLoc("isPrefixSumPass"), false);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, m_buffers[DMT_Buffer_Types::MESH_BUFFER]);
glDispatchCompute(gridSize.x, gridSize.y, gridSize.z);
glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
m_numTriangles = GPUPrefixScan::getSum(gl, m_buffers[DMT_Buffer_Types::BLOCK_BUFFER]);
}
void App::renderFrame(GLContext* gl)
{
// Setup transformations.
Mat4f worldToCamera = m_cameraCtrl.getWorldToCamera();
Mat4f projection = gl->xformFitToView(Vec2f(-1.0f, -1.0f), Vec2f(2.0f, 2.0f)) * m_cameraCtrl.getCameraToClip();
// Initialize GL state.
glClearColor(0.2f, 0.4f, 0.8f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
if (m_cullMode == CullMode_None)
glDisable(GL_CULL_FACE);
else
{
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glFrontFace((m_cullMode == CullMode_CW) ? GL_CCW : GL_CW);
}
// No mesh => skip.
if (!m_mesh)
{
gl->drawModalMessage("No mesh loaded!");
return;
}
// if we are computing radiosity, refresh mesh colors every 0.5 seconds
if ( m_radiosity->isRunning() && m_updateClock.getElapsed() > 0.5f )
{
m_radiosity->updateMeshColors();
m_radiosity->checkFinish();
// restart cycle
m_updateClock.start();
}
// setup up tone mapping
GLContext::Program* prog = gl->getProgram("MeshBase::draw_generic");
prog->use();
gl->setUniform(prog->getUniformLoc("reinhardLWhite"), m_toneMapWhite);
gl->setUniform(prog->getUniformLoc("tonemapBoost"), m_toneMapBoost);
// Render.
if (!gl->getConfig().isStereo)
renderScene(gl, worldToCamera, projection);
else
{
glDrawBuffer(GL_BACK_LEFT);
renderScene(gl, m_cameraCtrl.getCameraToLeftEye() * worldToCamera, projection);
glDrawBuffer(GL_BACK_RIGHT);
glClear(GL_DEPTH_BUFFER_BIT);
renderScene(gl, m_cameraCtrl.getCameraToRightEye() * worldToCamera, projection);
glDrawBuffer(GL_BACK);
}
m_areaLight->setSize( Vec2f( m_lightSize ) );
m_areaLight->draw( worldToCamera, projection );
// Display status line.
m_commonCtrl.message(sprintf("Triangles = %d, vertices = %d, materials = %d",
m_mesh->numTriangles(),
m_mesh->numVertices(),
m_mesh->numSubmeshes()),
"meshStats");
}