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Warning! This version of documentation is OUTDATED, as it describes an older SDK version! Please switch to the documentation for the latest SDK version.
Warning! This version of documentation describes an old SDK version which is no longer supported! Please upgrade to the latest SDK version.

Creating and Attaching a Cloth

Warning
The scope of applications for UnigineScript is limited to implementing materials-related logic (material expressions, scriptable materials, brush materials). Do not use UnigineScript as a language for application logic, please consider C#/C++ instead, as these APIs are the preferred ones. Availability of new Engine features in UnigineScript (beyond its scope of applications) is not guaranteed, as the current level of support assumes only fixing critical issues.

This example shows how to create a cloth pinned to 2 dummy bodies resting on a sphere using a particles joint.

Source code (UnigineScript)
#include <core/scripts/primitives.h>
			
ObjectMeshDynamic MyCloth;
ObjectMeshDynamic MySphere;
ObjectDummy dummy1;
ObjectDummy dummy2;

/// function, creating a named sphere with a specified radius and color at pos	
Object createSphere(string name, float radius, Vec4 color, Vec3 pos)
{
	// creating a dynamic mesh object with a sphere surface
	ObjectMeshDynamic sphere = Unigine::createSphere(radius);

	// setting object's parameters and transformation
	sphere.setWorldTransform(translate(pos));
	sphere.setMaterialParameterFloat4("albedo_color", color, 0);
	sphere.setName(name);

	return sphere;
}

/// function, creating a named cloth body with specified parameters
Object createBodyCloth(string name, float width, float height, float step, float mass, float friction, float restitution, float rigidity, float lrestitution, float arestitution, int num_iterations, Vec4 color, Vec3 pos) 
{
	// creating a dynamic mesh object with a plane surface and passing it to Editor
	ObjectMeshDynamic cloth = Unigine::createPlane(width,height,step);
	
	//assigning a cloth body to the dynamic mesh object and setting cloth parameters
	BodyCloth body = class_remove(new BodyCloth(cloth));
	body.setMass(mass);
	body.setFriction(friction);
	body.setRestitution(restitution);
	body.setLinearRestitution(lrestitution);
	body.setAngularRestitution(arestitution);
	body.setRigidity(rigidity);
	body.setNumIterations(num_iterations);

	// setting object's parameters and transformation
	cloth.setMaterialParameterFloat4("albedo_color", color, 0);	
	cloth.setWorldTransform(pos);
	cloth.setName(name);
	
	return cloth;
}

/// function, creating a named dummy body of a specified size at pos
Object createBodyDummy(string name, Vec3 size, Vec3 pos)
{
	// creating a dummy object and passing it to Editor
	ObjectDummy dummy = new ObjectDummy();
	
	// setting object's parameters
	dummy.setWorldTransform(translate(pos));
	dummy.setName(name);		

	//assigning a dummy body to the dummy object and adding a box shape	to it
	BodyDummy body = class_remove(new BodyDummy(dummy));
	ShapeBox shape = class_remove(new ShapeBox(size));
	body.addShape(shape, translate(0.0f, 0.0f, 0.0f));

	return dummy;
}

int init() {

	// setting up player
	PlayerSpectator player = new PlayerSpectator();
	player.setPosition(Vec3(30.0f,0.0f, 30.5f));
	player.setDirection(Vec3(-1.0f, 0.0f, -0.4f));
	engine.game.setPlayer(player);
	
	// creating a cloth
	MyCloth = createBodyCloth("MyCloth", 20.0f, 20.0f, 1.0f, 10.0f, 0.05f, 0.05f, 0.05f, 0.2f, 0.05f, 8, Vec4(1.0f, 0.1f, 0.1f, 1.0f), translate(Vec3(0.0f, 0.0f, 25.0f)));

	// creating a sphere
	MySphere = createSphere("MySphere", 3.0f, Vec4(1.0f, 0.1f, 0.1f, 1.0f), Vec3(-1.0f, 0.0f, 16.0f));
	
	// creating 2 dummy bodies to attach the cloth to
	dummy1 = createBodyDummy("fixpoint1", Vec3(1.0f, 1.0f, 1.0f), Vec3(-10.0f, -10.0f, 25.0f));
	dummy2 = createBodyDummy("fixpoint2", Vec3(1.0f, 1.0f, 1.0f), Vec3(-10.0f, 10.0f, 25.0f));
	
	// creating 2 particles joints to attach the cloth to dummy bodies
	class_remove(new JointParticles(dummy1.getBody(),MyCloth.getBody(),dummy1.getPosition(),Vec3(1.0f)));
	class_remove(new JointParticles(dummy2.getBody(),MyCloth.getBody(),dummy2.getPosition(),Vec3(1.0f)));
	
	return 1;
}
Last update: 2021-12-13
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