This page has been translated automatically.
UnigineEditor
Interface Overview
Assets Workflow
Settings and Preferences
Adjusting Node Parameters
Setting Up Materials
Setting Up Properties
Landscape Tool
Using Editor Tools for Specific Tasks
FAQ
Программирование
Fundamentals
Setting Up Development Environment
Usage Examples
UnigineScript
C++
C#
UUSL (Unified UNIGINE Shader Language)
File Formats
Rebuilding the Engine and Tools
GUI
Double Precision Coordinates
API
Containers
Common Functionality
Controls-Related Classes
Engine-Related Classes
Filesystem Functionality
GUI-Related Classes
Math Functionality
Node-Related Classes
Networking Functionality
Pathfinding-Related Classes
Plugins-Related Classes
CIGI Client Plugin
Rendering-Related Classes
Внимание! Эта версия документация УСТАРЕЛА, поскольку относится к более ранней версии SDK! Пожалуйста, переключитесь на самую актуальную документацию для последней версии SDK.
Внимание! Эта версия документации описывает устаревшую версию SDK, которая больше не поддерживается! Пожалуйста, обновитесь до последней версии SDK.

Unigine::PhysicsIntersectionNormal Class

Header:#include <UniginePhysics.h>
Inherits:PhysicsIntersection

This class stores the normal of the physics intersection point.

Usage Example

The following example shows how you can get the normal of the intersection point by using the PhysicsIntersectionNormal class. In this example the line is an invisible traced line from the point of the camera (vec3 p0) to the point of the mouse pointer (vec3 p1). The executing sequence is the following:

  • Define and initialize two points (p0 and p1) by using the Player::getDirectionFromScreen() function.
  • Create an instance of the PhysicsIntersectionNormal class to get the normal of the intersection point.
  • Check, if there is a intersection with an object.
  • In this example, when the object intersects with the traced line, all the surfaces of the intersected object change their material parameters. The PhysicsIntersectionNormal class instance gets the normal of the intersection point. You can get it by using getNormal() function.
Source code (C++)
// 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 and a property to the dynamic mesh
	dynamic_mesh->setWorldTransform(translate(Vec3(0.0f, 0.0f, 2.0f)));
	dynamic_mesh->setMaterial("mesh_base", "*");
	dynamic_mesh->setProperty("surface_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 PhysicsIntersectionNormal object to save the information about the intersection
	PhysicsIntersectionNormalPtr intersection = PhysicsIntersectionNormal::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 normal  
		ShapePtr shape = intersection->getShape();
		if (shape)
		{
			Log::message("Normal: type %s coordinates (%f %f %f)\n", typeid(intersection->getNormal()).name(),
				intersection->getNormal().x,
				intersection->getNormal().y,
				intersection->getNormal().z);
		}
	}

	return 1;
}

PhysicsIntersectionNormal Class

Members


static PhysicsIntersectionNormalPtr create()

The PhysicsIntersectionNormal constructor.

void setNormal(const Math::vec3 & normal)

Sets the new normal of the intersection point.

Arguments

  • const Math::vec3 & normal - Normal of the intersection point.

Math::vec3 getNormal()

Returns the normal of the intersection point.

Return value

Normal of the intersection point.
Last update: 04.06.2018
Build: ()