// Copyright (c) 2019 OPEN CASCADE SAS // // This file is part of the examples of the Open CASCADE Technology software library. // // 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 "WasmOcctView.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define THE_CANVAS_ID "canvas" namespace { //! Auxiliary wrapper for loading model. struct ModelAsyncLoader { std::string Name; std::string Path; ModelAsyncLoader (const char* theName, const char* thePath) : Name (theName), Path (thePath) {} //! File data read event. static void onDataRead (void* theOpaque, void* theBuffer, int theDataLen) { const ModelAsyncLoader* aTask = (ModelAsyncLoader* )theOpaque; WasmOcctView::openFromMemory (aTask->Name, reinterpret_cast(theBuffer), theDataLen, false); delete aTask; } //! File read error event. static void onReadFailed (void* theOpaque) { const ModelAsyncLoader* aTask = (ModelAsyncLoader* )theOpaque; Message::DefaultMessenger()->Send (TCollection_AsciiString("Error: unable to load file ") + aTask->Path.c_str(), Message_Fail); delete aTask; } }; //! Auxiliary wrapper for loading cubemap. struct CubemapAsyncLoader { //! Image file read event. static void onImageRead (const char* theFilePath) { Handle(Graphic3d_CubeMapPacked) aCubemap; Handle(Image_AlienPixMap) anImage = new Image_AlienPixMap(); if (anImage->Load (theFilePath)) { aCubemap = new Graphic3d_CubeMapPacked (anImage); } WasmOcctView::Instance().View()->SetBackgroundCubeMap (aCubemap, true, false); WasmOcctView::Instance().UpdateView(); } //! Image file failed read event. static void onImageFailed (const char* theFilePath) { Message::DefaultMessenger()->Send (TCollection_AsciiString("Error: unable to load image ") + theFilePath, Message_Fail); } }; } // ================================================================ // Function : Instance // Purpose : // ================================================================ WasmOcctView& WasmOcctView::Instance() { static WasmOcctView aViewer; return aViewer; } // ================================================================ // Function : WasmOcctView // Purpose : // ================================================================ WasmOcctView::WasmOcctView() : myDevicePixelRatio (1.0f), myNbUpdateRequests (0) { addActionHotKeys (Aspect_VKey_NavForward, Aspect_VKey_W, Aspect_VKey_W | Aspect_VKeyFlags_SHIFT); addActionHotKeys (Aspect_VKey_NavBackward , Aspect_VKey_S, Aspect_VKey_S | Aspect_VKeyFlags_SHIFT); addActionHotKeys (Aspect_VKey_NavSlideLeft, Aspect_VKey_A, Aspect_VKey_A | Aspect_VKeyFlags_SHIFT); addActionHotKeys (Aspect_VKey_NavSlideRight, Aspect_VKey_D, Aspect_VKey_D | Aspect_VKeyFlags_SHIFT); addActionHotKeys (Aspect_VKey_NavRollCCW, Aspect_VKey_Q, Aspect_VKey_Q | Aspect_VKeyFlags_SHIFT); addActionHotKeys (Aspect_VKey_NavRollCW, Aspect_VKey_E, Aspect_VKey_E | Aspect_VKeyFlags_SHIFT); addActionHotKeys (Aspect_VKey_NavSpeedIncrease, Aspect_VKey_Plus, Aspect_VKey_Plus | Aspect_VKeyFlags_SHIFT, Aspect_VKey_Equal, Aspect_VKey_NumpadAdd, Aspect_VKey_NumpadAdd | Aspect_VKeyFlags_SHIFT); addActionHotKeys (Aspect_VKey_NavSpeedDecrease, Aspect_VKey_Minus, Aspect_VKey_Minus | Aspect_VKeyFlags_SHIFT, Aspect_VKey_NumpadSubtract, Aspect_VKey_NumpadSubtract | Aspect_VKeyFlags_SHIFT); // arrow keys conflict with browser page scrolling, so better be avoided in non-fullscreen mode addActionHotKeys (Aspect_VKey_NavLookUp, Aspect_VKey_Numpad8); // Aspect_VKey_Up addActionHotKeys (Aspect_VKey_NavLookDown, Aspect_VKey_Numpad2); // Aspect_VKey_Down addActionHotKeys (Aspect_VKey_NavLookLeft, Aspect_VKey_Numpad4); // Aspect_VKey_Left addActionHotKeys (Aspect_VKey_NavLookRight, Aspect_VKey_Numpad6); // Aspect_VKey_Right addActionHotKeys (Aspect_VKey_NavSlideLeft, Aspect_VKey_Numpad1); // Aspect_VKey_Left |Aspect_VKeyFlags_SHIFT addActionHotKeys (Aspect_VKey_NavSlideRight, Aspect_VKey_Numpad3); // Aspect_VKey_Right|Aspect_VKeyFlags_SHIFT addActionHotKeys (Aspect_VKey_NavSlideUp, Aspect_VKey_Numpad9); // Aspect_VKey_Up |Aspect_VKeyFlags_SHIFT addActionHotKeys (Aspect_VKey_NavSlideDown, Aspect_VKey_Numpad7); // Aspect_VKey_Down |Aspect_VKeyFlags_SHIFT } // ================================================================ // Function : ~WasmOcctView // Purpose : // ================================================================ WasmOcctView::~WasmOcctView() { } // ================================================================ // Function : run // Purpose : // ================================================================ void WasmOcctView::run() { initWindow(); initViewer(); initDemoScene(); if (myView.IsNull()) { return; } myView->MustBeResized(); myView->Redraw(); // There is no infinite message loop, main() will return from here immediately. // Tell that our Module should be left loaded and handle events through callbacks. //emscripten_set_main_loop (redrawView, 60, 1); //emscripten_set_main_loop (redrawView, -1, 1); EM_ASM(Module['noExitRuntime'] = true); } // ================================================================ // Function : initWindow // Purpose : // ================================================================ void WasmOcctView::initWindow() { myDevicePixelRatio = emscripten_get_device_pixel_ratio(); myCanvasId = THE_CANVAS_ID; const char* aTargetId = !myCanvasId.IsEmpty() ? myCanvasId.ToCString() : EMSCRIPTEN_EVENT_TARGET_WINDOW; const EM_BOOL toUseCapture = EM_TRUE; emscripten_set_resize_callback (EMSCRIPTEN_EVENT_TARGET_WINDOW, this, toUseCapture, onResizeCallback); emscripten_set_mousedown_callback (aTargetId, this, toUseCapture, onMouseCallback); // bind these events to window to track mouse movements outside of canvas //emscripten_set_mouseup_callback (aTargetId, this, toUseCapture, onMouseCallback); //emscripten_set_mousemove_callback (aTargetId, this, toUseCapture, onMouseCallback); //emscripten_set_mouseleave_callback (aTargetId, this, toUseCapture, onMouseCallback); emscripten_set_mouseup_callback (EMSCRIPTEN_EVENT_TARGET_WINDOW, this, toUseCapture, onMouseCallback); emscripten_set_mousemove_callback (EMSCRIPTEN_EVENT_TARGET_WINDOW, this, toUseCapture, onMouseCallback); emscripten_set_dblclick_callback (aTargetId, this, toUseCapture, onMouseCallback); emscripten_set_click_callback (aTargetId, this, toUseCapture, onMouseCallback); emscripten_set_mouseenter_callback (aTargetId, this, toUseCapture, onMouseCallback); emscripten_set_wheel_callback (aTargetId, this, toUseCapture, onWheelCallback); emscripten_set_touchstart_callback (aTargetId, this, toUseCapture, onTouchCallback); emscripten_set_touchend_callback (aTargetId, this, toUseCapture, onTouchCallback); emscripten_set_touchmove_callback (aTargetId, this, toUseCapture, onTouchCallback); emscripten_set_touchcancel_callback(aTargetId, this, toUseCapture, onTouchCallback); //emscripten_set_keypress_callback (aTargetId, this, toUseCapture, onKeyCallback); emscripten_set_keydown_callback (aTargetId, this, toUseCapture, onKeyDownCallback); emscripten_set_keyup_callback (aTargetId, this, toUseCapture, onKeyUpCallback); //emscripten_set_focus_callback (aTargetId, this, toUseCapture, onFocusCallback); //emscripten_set_focusin_callback (aTargetId, this, toUseCapture, onFocusCallback); emscripten_set_focusout_callback (aTargetId, this, toUseCapture, onFocusCallback); } // ================================================================ // Function : dumpGlInfo // Purpose : // ================================================================ void WasmOcctView::dumpGlInfo (bool theIsBasic) { TColStd_IndexedDataMapOfStringString aGlCapsDict; myView->DiagnosticInformation (aGlCapsDict, theIsBasic ? Graphic3d_DiagnosticInfo_Basic : Graphic3d_DiagnosticInfo_Complete); if (theIsBasic) { TCollection_AsciiString aViewport; aGlCapsDict.FindFromKey ("Viewport", aViewport); aGlCapsDict.Clear(); aGlCapsDict.Add ("Viewport", aViewport); } aGlCapsDict.Add ("Display scale", TCollection_AsciiString(myDevicePixelRatio)); // beautify output { TCollection_AsciiString* aGlVer = aGlCapsDict.ChangeSeek ("GLversion"); TCollection_AsciiString* aGlslVer = aGlCapsDict.ChangeSeek ("GLSLversion"); if (aGlVer != NULL && aGlslVer != NULL) { *aGlVer = *aGlVer + " [GLSL: " + *aGlslVer + "]"; aGlslVer->Clear(); } } TCollection_AsciiString anInfo; for (TColStd_IndexedDataMapOfStringString::Iterator aValueIter (aGlCapsDict); aValueIter.More(); aValueIter.Next()) { if (!aValueIter.Value().IsEmpty()) { if (!anInfo.IsEmpty()) { anInfo += "\n"; } anInfo += aValueIter.Key() + ": " + aValueIter.Value(); } } ::Message::DefaultMessenger()->Send (anInfo, Message_Warning); } // ================================================================ // Function : initPixelScaleRatio // Purpose : // ================================================================ void WasmOcctView::initPixelScaleRatio() { SetTouchToleranceScale (myDevicePixelRatio); if (!myView.IsNull()) { myView->ChangeRenderingParams().Resolution = (unsigned int )(96.0 * myDevicePixelRatio + 0.5); } if (!myContext.IsNull()) { myContext->SetPixelTolerance (int(myDevicePixelRatio * 6.0)); if (!myViewCube.IsNull()) { static const double THE_CUBE_SIZE = 60.0; myViewCube->SetSize (myDevicePixelRatio * THE_CUBE_SIZE, false); myViewCube->SetBoxFacetExtension (myViewCube->Size() * 0.15); myViewCube->SetAxesPadding (myViewCube->Size() * 0.10); myViewCube->SetFontHeight (THE_CUBE_SIZE * 0.16); if (myViewCube->HasInteractiveContext()) { myContext->Redisplay (myViewCube, false); } } } } // ================================================================ // Function : initViewer // Purpose : // ================================================================ bool WasmOcctView::initViewer() { // Build with "--preload-file MyFontFile.ttf" option // and register font in Font Manager to use custom font(s). /*const char* aFontPath = "MyFontFile.ttf"; if (Handle(Font_SystemFont) aFont = Font_FontMgr::GetInstance()->CheckFont (aFontPath)) { Font_FontMgr::GetInstance()->RegisterFont (aFont, true); } else { Message::DefaultMessenger()->Send (TCollection_AsciiString ("Error: font '") + aFontPath + "' is not found", Message_Fail); }*/ Handle(Aspect_DisplayConnection) aDisp; Handle(OpenGl_GraphicDriver) aDriver = new OpenGl_GraphicDriver (aDisp, false); aDriver->ChangeOptions().buffersNoSwap = true; // swap has no effect in WebGL aDriver->ChangeOptions().buffersOpaqueAlpha = true; // avoid unexpected blending of canvas with page background if (!aDriver->InitContext()) { Message::DefaultMessenger()->Send (TCollection_AsciiString ("Error: EGL initialization failed"), Message_Fail); return false; } Handle(V3d_Viewer) aViewer = new V3d_Viewer (aDriver); aViewer->SetComputedMode (false); aViewer->SetDefaultShadingModel (Graphic3d_TypeOfShadingModel_Phong); aViewer->SetDefaultLights(); aViewer->SetLightOn(); for (V3d_ListOfLight::Iterator aLightIter (aViewer->ActiveLights()); aLightIter.More(); aLightIter.Next()) { const Handle(V3d_Light)& aLight = aLightIter.Value(); if (aLight->Type() == Graphic3d_TypeOfLightSource_Directional) { aLight->SetCastShadows (true); } } Handle(Wasm_Window) aWindow = new Wasm_Window (THE_CANVAS_ID); aWindow->Size (myWinSizeOld.x(), myWinSizeOld.y()); myTextStyle = new Prs3d_TextAspect(); myTextStyle->SetFont (Font_NOF_ASCII_MONO); myTextStyle->SetHeight (12); myTextStyle->Aspect()->SetColor (Quantity_NOC_GRAY95); myTextStyle->Aspect()->SetColorSubTitle (Quantity_NOC_BLACK); myTextStyle->Aspect()->SetDisplayType (Aspect_TODT_SHADOW); myTextStyle->Aspect()->SetTextFontAspect (Font_FA_Bold); myTextStyle->Aspect()->SetTextZoomable (false); myTextStyle->SetHorizontalJustification (Graphic3d_HTA_LEFT); myTextStyle->SetVerticalJustification (Graphic3d_VTA_BOTTOM); myView = new V3d_View (aViewer); myView->Camera()->SetProjectionType (Graphic3d_Camera::Projection_Perspective); myView->SetImmediateUpdate (false); myView->ChangeRenderingParams().IsShadowEnabled = false; myView->ChangeRenderingParams().Resolution = (unsigned int )(96.0 * myDevicePixelRatio + 0.5); myView->ChangeRenderingParams().ToShowStats = true; myView->ChangeRenderingParams().StatsTextAspect = myTextStyle->Aspect(); myView->ChangeRenderingParams().StatsTextHeight = (int )myTextStyle->Height(); myView->SetWindow (aWindow); dumpGlInfo (false); myContext = new AIS_InteractiveContext (aViewer); initPixelScaleRatio(); return true; } // ================================================================ // Function : initDemoScene // Purpose : // ================================================================ void WasmOcctView::initDemoScene() { if (myContext.IsNull()) { return; } //myView->TriedronDisplay (Aspect_TOTP_LEFT_LOWER, Quantity_NOC_GOLD, 0.08, V3d_WIREFRAME); myViewCube = new AIS_ViewCube(); // presentation parameters initPixelScaleRatio(); myViewCube->SetTransformPersistence (new Graphic3d_TransformPers (Graphic3d_TMF_TriedronPers, Aspect_TOTP_RIGHT_LOWER, Graphic3d_Vec2i (100, 100))); myViewCube->Attributes()->SetDatumAspect (new Prs3d_DatumAspect()); myViewCube->Attributes()->DatumAspect()->SetTextAspect (myTextStyle); // animation parameters myViewCube->SetViewAnimation (myViewAnimation); myViewCube->SetFixedAnimationLoop (false); myViewCube->SetAutoStartAnimation (true); myContext->Display (myViewCube, false); // Build with "--preload-file MySampleFile.brep" option to load some shapes here. } // ================================================================ // Function : ProcessInput // Purpose : // ================================================================ void WasmOcctView::ProcessInput() { if (!myView.IsNull()) { // Queue onRedrawView()/redrawView callback to redraw canvas after all user input is flushed by browser. // Redrawing viewer on every single message would be a pointless waste of resources, // as user will see only the last drawn frame due to WebGL implementation details. // -1 in emscripten_async_call() redirects to requestAnimationFrame(); // requestPostAnimationFrame() is a better under development alternative. if (++myNbUpdateRequests == 1) { emscripten_async_call (onRedrawView, this, -1); } } } // ================================================================ // Function : UpdateView // Purpose : // ================================================================ void WasmOcctView::UpdateView() { if (!myView.IsNull()) { myView->Invalidate(); // queue next onRedrawView()/redrawView() ProcessInput(); } } // ================================================================ // Function : redrawView // Purpose : // ================================================================ void WasmOcctView::redrawView() { if (!myView.IsNull()) { myNbUpdateRequests = 0; FlushViewEvents (myContext, myView, true); } } // ================================================================ // Function : handleViewRedraw // Purpose : // ================================================================ void WasmOcctView::handleViewRedraw (const Handle(AIS_InteractiveContext)& theCtx, const Handle(V3d_View)& theView) { AIS_ViewController::handleViewRedraw (theCtx, theView); if (myToAskNextFrame) { // ask more frames if (++myNbUpdateRequests == 1) { emscripten_async_call (onRedrawView, this, -1); } } } // ================================================================ // Function : onResizeEvent // Purpose : // ================================================================ EM_BOOL WasmOcctView::onResizeEvent (int theEventType, const EmscriptenUiEvent* theEvent) { (void )theEventType; // EMSCRIPTEN_EVENT_RESIZE or EMSCRIPTEN_EVENT_CANVASRESIZED (void )theEvent; if (myView.IsNull()) { return EM_FALSE; } Handle(Wasm_Window) aWindow = Handle(Wasm_Window)::DownCast (myView->Window()); Graphic3d_Vec2i aWinSizeNew; aWindow->DoResize(); aWindow->Size (aWinSizeNew.x(), aWinSizeNew.y()); const float aPixelRatio = emscripten_get_device_pixel_ratio(); if (aWinSizeNew != myWinSizeOld || aPixelRatio != myDevicePixelRatio) { myWinSizeOld = aWinSizeNew; if (myDevicePixelRatio != aPixelRatio) { myDevicePixelRatio = aPixelRatio; initPixelScaleRatio(); } myView->MustBeResized(); myView->Invalidate(); myView->Redraw(); dumpGlInfo (true); } return EM_TRUE; } //! Update canvas bounding rectangle. EM_JS(void, jsUpdateBoundingClientRect, (), { Module._myCanvasRect = Module.canvas.getBoundingClientRect(); }); //! Get canvas bounding top. EM_JS(int, jsGetBoundingClientTop, (), { return Math.round(Module._myCanvasRect.top); }); //! Get canvas bounding left. EM_JS(int, jsGetBoundingClientLeft, (), { return Math.round(Module._myCanvasRect.left); }); // ================================================================ // Function : onMouseEvent // Purpose : // ================================================================ EM_BOOL WasmOcctView::onMouseEvent (int theEventType, const EmscriptenMouseEvent* theEvent) { if (myView.IsNull()) { return EM_FALSE; } Handle(Wasm_Window) aWindow = Handle(Wasm_Window)::DownCast (myView->Window()); if (theEventType == EMSCRIPTEN_EVENT_MOUSEMOVE || theEventType == EMSCRIPTEN_EVENT_MOUSEUP) { // these events are bound to EMSCRIPTEN_EVENT_TARGET_WINDOW, and coordinates should be converted jsUpdateBoundingClientRect(); EmscriptenMouseEvent anEvent = *theEvent; anEvent.targetX -= jsGetBoundingClientLeft(); anEvent.targetY -= jsGetBoundingClientTop(); aWindow->ProcessMouseEvent (*this, theEventType, &anEvent); return EM_FALSE; } return aWindow->ProcessMouseEvent (*this, theEventType, theEvent) ? EM_TRUE : EM_FALSE; } // ================================================================ // Function : onWheelEvent // Purpose : // ================================================================ EM_BOOL WasmOcctView::onWheelEvent (int theEventType, const EmscriptenWheelEvent* theEvent) { if (myView.IsNull() || theEventType != EMSCRIPTEN_EVENT_WHEEL) { return EM_FALSE; } Handle(Wasm_Window) aWindow = Handle(Wasm_Window)::DownCast (myView->Window()); return aWindow->ProcessWheelEvent (*this, theEventType, theEvent) ? EM_TRUE : EM_FALSE; } // ================================================================ // Function : onTouchEvent // Purpose : // ================================================================ EM_BOOL WasmOcctView::onTouchEvent (int theEventType, const EmscriptenTouchEvent* theEvent) { if (myView.IsNull()) { return EM_FALSE; } Handle(Wasm_Window) aWindow = Handle(Wasm_Window)::DownCast (myView->Window()); return aWindow->ProcessTouchEvent (*this, theEventType, theEvent) ? EM_TRUE : EM_FALSE; } // ================================================================ // Function : navigationKeyModifierSwitch // Purpose : // ================================================================ bool WasmOcctView::navigationKeyModifierSwitch (unsigned int theModifOld, unsigned int theModifNew, double theTimeStamp) { bool hasActions = false; for (unsigned int aKeyIter = 0; aKeyIter < Aspect_VKey_ModifiersLower; ++aKeyIter) { if (!myKeys.IsKeyDown (aKeyIter)) { continue; } Aspect_VKey anActionOld = Aspect_VKey_UNKNOWN, anActionNew = Aspect_VKey_UNKNOWN; myNavKeyMap.Find (aKeyIter | theModifOld, anActionOld); myNavKeyMap.Find (aKeyIter | theModifNew, anActionNew); if (anActionOld == anActionNew) { continue; } if (anActionOld != Aspect_VKey_UNKNOWN) { myKeys.KeyUp (anActionOld, theTimeStamp); } if (anActionNew != Aspect_VKey_UNKNOWN) { hasActions = true; myKeys.KeyDown (anActionNew, theTimeStamp); } } return hasActions; } // ================================================================ // Function : onFocusEvent // Purpose : // ================================================================ EM_BOOL WasmOcctView::onFocusEvent (int theEventType, const EmscriptenFocusEvent* theEvent) { if (myView.IsNull() || (theEventType != EMSCRIPTEN_EVENT_FOCUS && theEventType != EMSCRIPTEN_EVENT_FOCUSIN // about to receive focus && theEventType != EMSCRIPTEN_EVENT_FOCUSOUT)) { return EM_FALSE; } Handle(Wasm_Window) aWindow = Handle(Wasm_Window)::DownCast (myView->Window()); return aWindow->ProcessFocusEvent (*this, theEventType, theEvent) ? EM_TRUE : EM_FALSE; } // ================================================================ // Function : onKeyDownEvent // Purpose : // ================================================================ EM_BOOL WasmOcctView::onKeyDownEvent (int theEventType, const EmscriptenKeyboardEvent* theEvent) { if (myView.IsNull() || theEventType != EMSCRIPTEN_EVENT_KEYDOWN) // EMSCRIPTEN_EVENT_KEYPRESS { return EM_FALSE; } Handle(Wasm_Window) aWindow = Handle(Wasm_Window)::DownCast (myView->Window()); return aWindow->ProcessKeyEvent (*this, theEventType, theEvent) ? EM_TRUE : EM_FALSE; } //======================================================================= //function : KeyDown //purpose : //======================================================================= void WasmOcctView::KeyDown (Aspect_VKey theKey, double theTime, double thePressure) { const unsigned int aModifOld = myKeys.Modifiers(); AIS_ViewController::KeyDown (theKey, theTime, thePressure); const unsigned int aModifNew = myKeys.Modifiers(); if (aModifNew != aModifOld && navigationKeyModifierSwitch (aModifOld, aModifNew, theTime)) { // modifier key just pressed } Aspect_VKey anAction = Aspect_VKey_UNKNOWN; if (myNavKeyMap.Find (theKey | myKeys.Modifiers(), anAction) && anAction != Aspect_VKey_UNKNOWN) { AIS_ViewController::KeyDown (anAction, theTime, thePressure); } } // ================================================================ // Function : onKeyUpEvent // Purpose : // ================================================================ EM_BOOL WasmOcctView::onKeyUpEvent (int theEventType, const EmscriptenKeyboardEvent* theEvent) { if (myView.IsNull() || theEventType != EMSCRIPTEN_EVENT_KEYUP) { return EM_FALSE; } Handle(Wasm_Window) aWindow = Handle(Wasm_Window)::DownCast (myView->Window()); return aWindow->ProcessKeyEvent (*this, theEventType, theEvent) ? EM_TRUE : EM_FALSE; } //======================================================================= //function : KeyUp //purpose : //======================================================================= void WasmOcctView::KeyUp (Aspect_VKey theKey, double theTime) { const unsigned int aModifOld = myKeys.Modifiers(); AIS_ViewController::KeyUp (theKey, theTime); Aspect_VKey anAction = Aspect_VKey_UNKNOWN; if (myNavKeyMap.Find (theKey | myKeys.Modifiers(), anAction) && anAction != Aspect_VKey_UNKNOWN) { AIS_ViewController::KeyUp (anAction, theTime); processKeyPress (anAction); } const unsigned int aModifNew = myKeys.Modifiers(); if (aModifNew != aModifOld && navigationKeyModifierSwitch (aModifOld, aModifNew, theTime)) { // modifier key released } processKeyPress (theKey | aModifNew); } //============================================================================== //function : processKeyPress //purpose : //============================================================================== bool WasmOcctView::processKeyPress (Aspect_VKey theKey) { switch (theKey) { case Aspect_VKey_F: { myView->FitAll (0.01, false); UpdateView(); return true; } } return false; } // ================================================================ // Function : setCubemapBackground // Purpose : // ================================================================ void WasmOcctView::setCubemapBackground (const std::string& theImagePath) { if (!theImagePath.empty()) { emscripten_async_wget (theImagePath.c_str(), "/emulated/cubemap.jpg", CubemapAsyncLoader::onImageRead, CubemapAsyncLoader::onImageFailed); } else { WasmOcctView::Instance().View()->SetBackgroundCubeMap (Handle(Graphic3d_CubeMapPacked)(), true, false); WasmOcctView::Instance().UpdateView(); } } // ================================================================ // Function : fitAllObjects // Purpose : // ================================================================ void WasmOcctView::fitAllObjects (bool theAuto) { WasmOcctView& aViewer = Instance(); if (theAuto) { aViewer.FitAllAuto (aViewer.Context(), aViewer.View()); } else { aViewer.View()->FitAll (0.01, false); } aViewer.UpdateView(); } // ================================================================ // Function : removeAllObjects // Purpose : // ================================================================ void WasmOcctView::removeAllObjects() { WasmOcctView& aViewer = Instance(); for (NCollection_IndexedDataMap::Iterator anObjIter (aViewer.myObjects); anObjIter.More(); anObjIter.Next()) { aViewer.Context()->Remove (anObjIter.Value(), false); } aViewer.myObjects.Clear(); aViewer.UpdateView(); } // ================================================================ // Function : removeObject // Purpose : // ================================================================ bool WasmOcctView::removeObject (const std::string& theName) { WasmOcctView& aViewer = Instance(); Handle(AIS_InteractiveObject) anObj; if (!theName.empty() && !aViewer.myObjects.FindFromKey (theName.c_str(), anObj)) { return false; } aViewer.Context()->Remove (anObj, false); aViewer.myObjects.RemoveKey (theName.c_str()); aViewer.UpdateView(); return true; } // ================================================================ // Function : eraseObject // Purpose : // ================================================================ bool WasmOcctView::eraseObject (const std::string& theName) { WasmOcctView& aViewer = Instance(); Handle(AIS_InteractiveObject) anObj; if (!theName.empty() && !aViewer.myObjects.FindFromKey (theName.c_str(), anObj)) { return false; } aViewer.Context()->Erase (anObj, false); aViewer.UpdateView(); return true; } // ================================================================ // Function : displayObject // Purpose : // ================================================================ bool WasmOcctView::displayObject (const std::string& theName) { WasmOcctView& aViewer = Instance(); Handle(AIS_InteractiveObject) anObj; if (!theName.empty() && !aViewer.myObjects.FindFromKey (theName.c_str(), anObj)) { return false; } aViewer.Context()->Display (anObj, false); aViewer.UpdateView(); return true; } // ================================================================ // Function : openFromUrl // Purpose : // ================================================================ void WasmOcctView::openFromUrl (const std::string& theName, const std::string& theModelPath) { ModelAsyncLoader* aTask = new ModelAsyncLoader (theName.c_str(), theModelPath.c_str()); emscripten_async_wget_data (theModelPath.c_str(), (void* )aTask, ModelAsyncLoader::onDataRead, ModelAsyncLoader::onReadFailed); } // ================================================================ // Function : openFromMemory // Purpose : // ================================================================ bool WasmOcctView::openFromMemory (const std::string& theName, uintptr_t theBuffer, int theDataLen, bool theToFree) { removeObject (theName); char* aBytes = reinterpret_cast(theBuffer); if (aBytes == nullptr || theDataLen <= 0) { return false; } // Function to check if specified data stream starts with specified header. #define dataStartsWithHeader(theData, theHeader) (::strncmp(theData, theHeader, sizeof(theHeader) - 1) == 0) if (dataStartsWithHeader(aBytes, "DBRep_DrawableShape")) { return openBRepFromMemory (theName, theBuffer, theDataLen, theToFree); } else if (dataStartsWithHeader(aBytes, "glTF")) { //return openGltfFromMemory (theName, theBuffer, theDataLen, theToFree); } if (theToFree) { free (aBytes); } Message::SendFail() << "Error: file '" << theName.c_str() << "' has unsupported format"; return false; } // ================================================================ // Function : openBRepFromMemory // Purpose : // ================================================================ bool WasmOcctView::openBRepFromMemory (const std::string& theName, uintptr_t theBuffer, int theDataLen, bool theToFree) { removeObject (theName); WasmOcctView& aViewer = Instance(); TopoDS_Shape aShape; BRep_Builder aBuilder; bool isLoaded = false; { char* aRawData = reinterpret_cast(theBuffer); Standard_ArrayStreamBuffer aStreamBuffer (aRawData, theDataLen); std::istream aStream (&aStreamBuffer); BRepTools::Read (aShape, aStream, aBuilder); if (theToFree) { free (aRawData); } isLoaded = true; } if (!isLoaded) { return false; } Handle(AIS_Shape) aShapePrs = new AIS_Shape (aShape); if (!theName.empty()) { aViewer.myObjects.Add (theName.c_str(), aShapePrs); } aShapePrs->SetMaterial (Graphic3d_NameOfMaterial_Silver); aViewer.Context()->Display (aShapePrs, AIS_Shaded, 0, false); aViewer.View()->FitAll (0.01, false); aViewer.UpdateView(); Message::DefaultMessenger()->Send (TCollection_AsciiString("Loaded file ") + theName.c_str(), Message_Info); Message::DefaultMessenger()->Send (OSD_MemInfo::PrintInfo(), Message_Trace); return true; } // ================================================================ // Function : displayGround // Purpose : // ================================================================ void WasmOcctView::displayGround (bool theToShow) { static Handle(AIS_Shape) aGroundPrs = new AIS_Shape (TopoDS_Shape()); WasmOcctView& aViewer = Instance(); Bnd_Box aBox; if (theToShow) { aViewer.Context()->Remove (aGroundPrs, false); aBox = aViewer.View()->View()->MinMaxValues(); } if (aBox.IsVoid() || aBox.IsZThin (Precision::Confusion())) { if (!aGroundPrs.IsNull() && aGroundPrs->HasInteractiveContext()) { aViewer.Context()->Remove (aGroundPrs, false); aViewer.UpdateView(); } return; } const gp_XYZ aSize = aBox.CornerMax().XYZ() - aBox.CornerMin().XYZ(); const double aRadius = Max (aSize.X(), aSize.Y()); const double aZValue = aBox.CornerMin().Z() - Min (10.0, aSize.Z() * 0.01); const double aZSize = aRadius * 0.01; gp_XYZ aGroundCenter ((aBox.CornerMin().X() + aBox.CornerMax().X()) * 0.5, (aBox.CornerMin().Y() + aBox.CornerMax().Y()) * 0.5, aZValue); TopoDS_Compound aGround; gp_Trsf aTrsf1, aTrsf2; aTrsf1.SetTranslation (gp_Vec (aGroundCenter - gp_XYZ(0.0, 0.0, aZSize))); aTrsf2.SetTranslation (gp_Vec (aGroundCenter)); Prs3d_ToolCylinder aCylTool (aRadius, aRadius, aZSize, 50, 1); Prs3d_ToolDisk aDiskTool (0.0, aRadius, 50, 1); TopoDS_Face aCylFace, aDiskFace1, aDiskFace2; BRep_Builder().MakeFace (aCylFace, aCylTool .CreatePolyTriangulation (aTrsf1)); BRep_Builder().MakeFace (aDiskFace1, aDiskTool.CreatePolyTriangulation (aTrsf1)); BRep_Builder().MakeFace (aDiskFace2, aDiskTool.CreatePolyTriangulation (aTrsf2)); BRep_Builder().MakeCompound (aGround); BRep_Builder().Add (aGround, aCylFace); BRep_Builder().Add (aGround, aDiskFace1); BRep_Builder().Add (aGround, aDiskFace2); aGroundPrs->SetShape (aGround); aGroundPrs->SetToUpdate(); aGroundPrs->SetMaterial (Graphic3d_NameOfMaterial_Stone); aGroundPrs->SetInfiniteState (false); aViewer.Context()->Display (aGroundPrs, AIS_Shaded, -1, false); aGroundPrs->SetInfiniteState (true); aViewer.UpdateView(); } // Module exports EMSCRIPTEN_BINDINGS(OccViewerModule) { emscripten::function("setCubemapBackground", &WasmOcctView::setCubemapBackground); emscripten::function("fitAllObjects", &WasmOcctView::fitAllObjects); emscripten::function("removeAllObjects", &WasmOcctView::removeAllObjects); emscripten::function("removeObject", &WasmOcctView::removeObject); emscripten::function("eraseObject", &WasmOcctView::eraseObject); emscripten::function("displayObject", &WasmOcctView::displayObject); emscripten::function("displayGround", &WasmOcctView::displayGround); emscripten::function("openFromUrl", &WasmOcctView::openFromUrl); emscripten::function("openFromMemory", &WasmOcctView::openFromMemory, emscripten::allow_raw_pointers()); emscripten::function("openBRepFromMemory", &WasmOcctView::openBRepFromMemory, emscripten::allow_raw_pointers()); }