/* build a canonical LR(1) parse table */
int BuildLRParser(GRAMMAR_TABLE grammar,
LR_TABLE* parser)
{
FindNullableNonterminals(&grammar);
BuildFirstSets(&grammar);
BuildFollowSets(&grammar);
// building the collection of item sets for an LR(1) grammar
LR_ITEM_COLLECTION* C = CanonicalCollection(&grammar);
//PrintCollection(C, &grammar);
RemoveEpsilons(&grammar);
*parser = ConstructTable(C, &grammar);
FreeCollection(C);
return 0;
}
/**
* Construct the scene
*/
void ConstructScene()
{
// Construct the lighting shader node
LightingShaderNode* lightingShader = new LightingShaderNode();
if (!lightingShader->Create("phong.vert", "phong.frag") ||
!lightingShader->GetLocations())
exit(-1);
int positionLoc = lightingShader->GetPositionLoc();
int normalLoc = lightingShader->GetNormalLoc();
// -------------------- Geometry -------------------- //
// Construct a unit square - use less subdivisions to see how
// phong shading improves the lighting
UnitSquareSurface* unitSquare = new UnitSquareSurface(2, positionLoc, normalLoc);
// Construct a unit box
SceneNode* box = ConstructUnitBox(unitSquare);
// Construct a unit cylinder surface
ConicSurface* cylinder = new ConicSurface(1.0f, 1.0f, 18, 4, positionLoc, normalLoc);
// Construct a torus
TorusSurface* torus = new TorusSurface(20.0f, 5.0f, 18, 18, positionLoc, normalLoc);
// Teapot
MeshTeapot* teapot = new MeshTeapot(3, positionLoc, normalLoc);
// Sphere
SphereSection* sphere = new SphereSection(-90.0f, 90.0f, 18,
-180.0f, 180.0f, 36, 1.0f, positionLoc, normalLoc);
//-------------------- Materials ------------------------- //
// Wood
PresentationNode* wood = new PresentationNode;
wood->SetMaterialAmbientAndDiffuse(Color4(0.55f, 0.45f, 0.15f));
wood->SetMaterialSpecular(Color4(0.3f, 0.3f, 0.3f));
wood->SetMaterialShininess(64.0f);
// Silver
PresentationNode* silver = new PresentationNode;
silver->SetMaterialAmbient(Color4(0.19225f, 0.19225f, 0.19225f));
silver->SetMaterialDiffuse(Color4(0.50754f, 0.50754f, 0.50754f));
silver->SetMaterialSpecular(Color4(0.508273f, 0.508273f, 0.508273f));
silver->SetMaterialShininess(51.2f);
// Black, shiny
PresentationNode* shinyBlack = new PresentationNode;
shinyBlack->SetMaterialAmbient(Color4(0.0f, 0.0f, 0.0f));
shinyBlack->SetMaterialDiffuse(Color4(0.01f, 0.01f, 0.01f));
shinyBlack->SetMaterialSpecular(Color4(0.5f, 0.5f, 0.5f));
shinyBlack->SetMaterialShininess(32.0f);
// Shiny blue
PresentationNode* shinyBlue = new PresentationNode;
shinyBlue->SetMaterialAmbient(Color4(0.05f, 0.05f, 0.2f));
shinyBlue->SetMaterialDiffuse(Color4(0.2f, 0.2f, 0.6f));
shinyBlue->SetMaterialSpecular(Color4(0.75f, 0.75, 0.75f));
shinyBlue->SetMaterialShininess(76.8f);
// ------------------ Transformations ------------------- //
// Position the table in the room
TransformNode* tableTransform = new TransformNode;
tableTransform->Translate(-50.0f, 50.0f, 0.0f);
tableTransform->Rotate(30.0f, 0.0f, 0.0f, 1.0f);
// Teapot transform
TransformNode* teapotTransform = new TransformNode;
teapotTransform->Translate(0.0f, 0.0f, 26.0f);
teapotTransform->Scale(2.5f, 2.5f, 2.5f);
// Torus
TransformNode* torusTransform = new TransformNode;
torusTransform->Translate(0.0f, 90.0f, 20.0f);
torusTransform->Rotate(60.0f, 1.0f, 0.0f, 0.0f);
// Sphere
TransformNode* sphereTransform = new TransformNode;
sphereTransform->Translate(80.0f, 20.0f, 10.0f);
sphereTransform->Scale(10.0f, 10.0f, 10.0f);
// --------------------------- Camera ----------------------- //
MyCamera = new CameraNode;
MyCamera->SetPosition(Point3(0.0f, -100.0f, 20.0f));
MyCamera->SetLookAtPt(Point3(0.0f, 0.0f, 20.0f));
MyCamera->SetViewUp(Vector3(0.0, 0.0, 1.0));
MyCamera->SetPerspective(50.0, 1.0, 1.0, 300.0);
// -------------------- Lighting --------------------------/
// Set the global light ambient
Color4 globalAmbient(0.4f, 0.4f, 0.4f, 1.0f);
lightingShader->SetGlobalAmbient(globalAmbient);
// Light 0 - point light source in back right corner
LightNode* light0 = new LightNode(0);
light0->SetDiffuse(Color4(0.5f, 0.5f, 0.5f, 1.0f));
light0->SetSpecular(Color4(0.5f, 0.5f, 0.5f, 1.0f));
light0->SetPosition(HPoint3(90.0f, 90.0f, 30.f, 1.0f));
light0->Enable();
// Light1 - directional light from the ceiling
LightNode* light1 = new LightNode(1);
light1->SetDiffuse(Color4(0.7f, 0.7f, 0.7f, 1.0f ));
light1->SetSpecular(Color4(0.7f, 0.7f, 0.7f, 1.0f));
light1->SetPosition(HPoint3(0.0f, 0.0f, 1.0f, 0.0f));
light1->Enable();
// Spotlight - reddish spotlight - we will place at the camera location
// shining along -VPN
Spotlight = new LightNode(2);
Spotlight->SetDiffuse(Color4(0.5f, 0.1f, 0.1f, 1.0f ));
Spotlight->SetSpecular(Color4(0.5f, 0.1f, 0.1f, 1.0f));
Point3 pos = MyCamera->GetPosition();
Spotlight->SetPosition(HPoint3(pos.x, pos.y, pos.z, 1.0f));
Vector3 dir = MyCamera->GetViewPlaneNormal() * -1.0f;
Spotlight->SetSpotlight(dir, 32.0f, 30.0f);
Spotlight->Enable();
// --------------------- Scene construction ----------------- //
// Construct the scene root node
SceneRoot = new SceneNode;
SceneRoot->AddChild(lightingShader);
lightingShader->AddChild(MyCamera);
// Add the lights as the children of the camera
MyCamera->AddChild(light0);
light0->AddChild(light1);
light1->AddChild(Spotlight);
// Create a scene node to hold all scene objects (other than camera
// and lights)
SceneNode* myScene = new SceneNode;
// Add the scene under the last light
Spotlight->AddChild(myScene);
// Construct the room (walls, floor, ceiling)
ConstructRoom(myScene, unitSquare);
// Construct the table
SceneNode* table = ConstructTable(box, cylinder);
myScene->AddChild(wood);
wood->AddChild(tableTransform);
tableTransform->AddChild(table);
// Place a teapot on the table
tableTransform->AddChild(teapotTransform);
teapotTransform->AddChild(silver);
silver->AddChild(teapot);
// Place a torus
myScene->AddChild(shinyBlack);
shinyBlack->AddChild(torusTransform);
torusTransform->AddChild(torus);
// Place a sphere
myScene->AddChild(shinyBlue);
shinyBlue->AddChild(sphereTransform);
sphereTransform->AddChild(sphere);
}
