Unigine::PhysicsIntersection Class

// AppWorldLogic.cpp
#include <UnigineEditor.h>
#include <UniginePhysics.h>
#include <UnigineGame.h>
#include <UnigineApp.h>
#include <UnigineObjects.h>

using namespace Unigine;
using namespace Math;

int AppWorldLogic::init() {
	
	// create a mesh instance with a box surface
	MeshPtr mesh = Mesh::create();
	mesh->addBoxSurface("box", vec3(0.2f));

	// create a new dynamic mesh from the Mesh instance and add it to editor
	ObjectMeshDynamicPtr dynamic_mesh = ObjectMeshDynamic::create(mesh);
	dynamic_mesh->release();
	Editor::get()->addNode(dynamic_mesh->getNode());

	// assign a material to the dynamic mesh
	dynamic_mesh->setWorldTransform(translate(Vec3(0.0f, 0.0f, 2.0f)));
	dynamic_mesh->setMaterial("mesh_base", "*");

	// assign a body and a shape to the dynamic mesh
	BodyRigidPtr body = BodyRigid::create(dynamic_mesh->getObject());
	ShapeBoxPtr shape = ShapeBox::create(body->getBody(), vec3(0.2f));

	return 1;
}

// start of the main loop
int AppWorldLogic::update() {
	
	// initialize points of the mouse direction
	Vec3 p0, p1;

	// get the current player (camera)
	PlayerPtr player = Game::get()->getPlayer();
	if (player.get() == NULL)
		return 0;
	// get width and height of the current application window
	int width = App::get()->getWidth();
	int height = App::get()->getHeight();
	// get the current X and Y coordinates of the mouse pointer
	int mouse_x = App::get()->getMouseX();
	int mouse_y = App::get()->getMouseY();
	// get the mouse direction from the player's position (p0) to the mouse cursor pointer (p1)
	player->getDirectionFromScreen(p0, p1, mouse_x, mouse_y, width, height);

	// create the instance of the PhysicsIntersection object to save the information about the intersection
	PhysicsIntersectionPtr intersection = PhysicsIntersection::create();
	// get an intersection
	ObjectPtr object = Physics::get()->getIntersection(p0, p1, 1, intersection);

	// if the intersection has been occurred, change the parameter of the object's material    
	if (object)
	{
		for (int i = 0; i < object->getNumSurfaces(); i++)
		{
			object->setMaterialParameter("albedo_color", vec4(1.0f, 1.0f, 0.0f, 1.0f), i);
		}

		// if the intersected object has a shape, show the information about the intersection   
		ShapePtr shape = intersection->getShape();
		if (shape)
		{
			Log::message("physics intersection info: point: (%f %f %f) shape: %s\n", intersection->getPoint().x, intersection.getPoint().y, intersection.getPoint().z, typeid(shape->getType()).name());
		}
	}

	return 1;
}