physics2d

package
v0.0.0-...-5ecc521 Latest Latest
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 Go to latest Published: Oct 31, 2019 License: Zlib Imports: 9 Imported by: 2

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// Defines how big one meter is
	PIXEL_PER_METER float32 = 100.0
	// Defines the size of the world (can be used to remove everything outside of the world)
	WORLD_SIZE mgl32.Vec2
	// The number of velocity iterations of Box2D
	VELOCITY_ITERATIONS = 6
	// The number of position iterations of Box2D
	POSITION_ITERATIONS = 2
)

Functions

func B2Vec2ToVec2 

func B2Vec2ToVec2(vec box2d.B2Vec2) mgl32.Vec2

Converts a physics Vec2 to a pixel Vec2

func ScalarToBox2D 

func ScalarToBox2D(v float32) float64

Converts a pixel scalar value to a physics value

func ScalarToPixel 

func ScalarToPixel(v float64) float32

Converts a physics scalar value to a pixel value

func ToBox2DAngle 

func ToBox2DAngle(angle float32) float64

Converts a pixel angel to physics angle

func ToBox2DCoordinates 

func ToBox2DCoordinates(vec mgl32.Vec2) box2d.B2Vec2

Converts pixel coordinates to physics coordinates

func ToBox2DDirection 

func ToBox2DDirection(vec mgl32.Vec2) box2d.B2Vec2

Converts a pixel direction into a physics direction

func ToPixelAngle 

func ToPixelAngle(angle float64) float32

Converts a physics angle to pixel angle

func ToPixelCoordinates 

func ToPixelCoordinates(vec box2d.B2Vec2) mgl32.Vec2

Converts physics coordinates to pixel coordinates

func ToPixelDirection 

func ToPixelDirection(vec box2d.B2Vec2) mgl32.Vec2

Converts a physics direction into a pixel direction

func Vec2ToB2Vec2 

func Vec2ToB2Vec2(vec mgl32.Vec2) box2d.B2Vec2

Converts a pixel Vec2 to a physics Vec2

Types

type PhysicsConnector2D 

type PhysicsConnector2D struct {
	// The transform to which this object is connected to
	Transform *gohome.TransformableObject2D
	// The body to which this object is connected to
	Body *box2d.B2Body
	// The offset from the body
	Offset mgl32.Vec2
	// contains filtered or unexported fields
}

Connects a transformable object with a body and updates the position and rotation

func (*PhysicsConnector2D) Init 

func (this *PhysicsConnector2D) Init(tobj *gohome.TransformableObject2D, body *box2d.B2Body, pmgr *PhysicsManager2D)

Initialises the values

func (*PhysicsConnector2D) Terminate 

func (this *PhysicsConnector2D) Terminate()

Removes this connector from the manager

func (*PhysicsConnector2D) Update 

func (this *PhysicsConnector2D) Update()

Gets called by the physics manager

type PhysicsDebugDraw2D 

type PhysicsDebugDraw2D struct {
	gohome.NilRenderObject

	// Wether bodies should be drawn
	DrawBodies bool
	// Wether joints shoul be drawn
	DrawJoints bool
	// Wether bounding boxes should be drawn
	DrawAABBs bool
	// Wether only static bodies should be drawn
	OnlyDrawStatic bool
	// Wether only dynamic bodies should be drawn
	OnlyDrawDynamic bool
	// Wether anything should be drawn
	Visible bool
	// contains filtered or unexported fields
}

This struct renders all physics objects to the screen

func (*PhysicsDebugDraw2D) DrawChain 

func (this *PhysicsDebugDraw2D) DrawChain(f *box2d.B2Fixture, xf *box2d.B2Transform)

Loads the data used to render a chain

func (*PhysicsDebugDraw2D) DrawCircle 

func (this *PhysicsDebugDraw2D) DrawCircle(f *box2d.B2Fixture, xf *box2d.B2Transform)

Loads the data used to render a circle

func (*PhysicsDebugDraw2D) DrawEdge 

func (this *PhysicsDebugDraw2D) DrawEdge(f *box2d.B2Fixture, xf *box2d.B2Transform)

Loads the data used to render an edge

func (*PhysicsDebugDraw2D) DrawFixture 

func (this *PhysicsDebugDraw2D) DrawFixture(f *box2d.B2Fixture, xf *box2d.B2Transform, awake bool)

Loads the data used to render a Fixture

func (*PhysicsDebugDraw2D) DrawJoint 

func (this *PhysicsDebugDraw2D) DrawJoint(j box2d.B2JointInterface)

Loads the data used to render a joint

func (*PhysicsDebugDraw2D) DrawPolygon 

func (this *PhysicsDebugDraw2D) DrawPolygon(f *box2d.B2Fixture, xf *box2d.B2Transform)

Loads the data used to render a polygon

func (*PhysicsDebugDraw2D) GetType 

func (this *PhysicsDebugDraw2D) GetType() gohome.RenderType

Returns TYPE_2D_NORMAL

func (*PhysicsDebugDraw2D) IsVisible 

func (this *PhysicsDebugDraw2D) IsVisible() bool

Returns wether anything should be drawn

func (*PhysicsDebugDraw2D) Render 

func (this *PhysicsDebugDraw2D) Render()

Creates all shapes and renders them

func (*PhysicsDebugDraw2D) RendersLast 

func (this *PhysicsDebugDraw2D) RendersLast() bool

Returns true

type PhysicsManager2D 

type PhysicsManager2D struct {
	// The Box2D world
	World box2d.B2World
	// Wether the world is paused (no movement)
	Paused bool
	// contains filtered or unexported fields
}

The manager that handles all 2D physics

func (*PhysicsManager2D) CreateDynamicBox 

func (this *PhysicsManager2D) CreateDynamicBox(pos mgl32.Vec2, size mgl32.Vec2) *box2d.B2Body

Creates a box that can move around

func (*PhysicsManager2D) CreateDynamicCircle 

func (this *PhysicsManager2D) CreateDynamicCircle(pos mgl32.Vec2, radius float32) *box2d.B2Body

Creates a circle that can move around

func (*PhysicsManager2D) CreateEllipse 

func (this *PhysicsManager2D) CreateEllipse(X, Y, Width, Height float64) *box2d.B2Body

Creates an ellipse

func (*PhysicsManager2D) CreatePolygon 

func (this *PhysicsManager2D) CreatePolygon(X, Y float64, poly *tmx.Polygon) *box2d.B2Body

Creates a polygon from a tmx polygon

func (*PhysicsManager2D) CreatePolyline 

func (this *PhysicsManager2D) CreatePolyline(X, Y float64, line *tmx.Polyline) *box2d.B2Body

Creates a polyline from a tmx polyline

func (*PhysicsManager2D) CreateRectangle 

func (this *PhysicsManager2D) CreateRectangle(X, Y, Width, Height float64) *box2d.B2Body

Creates a rectangle

func (*PhysicsManager2D) CreateStaticBox 

func (this *PhysicsManager2D) CreateStaticBox(pos mgl32.Vec2, size mgl32.Vec2) *box2d.B2Body

Creates a box that sticks to a position

func (*PhysicsManager2D) CreateStaticCircle 

func (this *PhysicsManager2D) CreateStaticCircle(pos mgl32.Vec2, radius float32) *box2d.B2Body

Creates a circle that sticks to a position

func (*PhysicsManager2D) GetDebugDraw 

func (this *PhysicsManager2D) GetDebugDraw() PhysicsDebugDraw2D

Returns a new debug drawer

func (*PhysicsManager2D) Init 

func (this *PhysicsManager2D) Init(gravity mgl32.Vec2)

Initialises the world and everything using a gravity value

func (*PhysicsManager2D) LayerToCollision 

func (this *PhysicsManager2D) LayerToCollision(tiledmap *gohome.TiledMap, layerName string) (bodies []*box2d.B2Body)

Converts the objects of a tmx map layer to static collision objects

func (*PhysicsManager2D) Terminate 

func (this *PhysicsManager2D) Terminate()

Destroys all bodies and the world

func (*PhysicsManager2D) Update 

func (this *PhysicsManager2D) Update(delta_time float32)

Gets called every frame and updates the physics

Source Files

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