org.jbox2d.common

Interface IViewportTransform

All Known Implementing Classes:

OBBViewportTransform

public interface IViewportTransform

This is the viewport transform used from drawing. Use yFlip if you are drawing from the top-left corner.

Author:

daniel

Method Summary

Modifier and Type	Method and Description
Vec2	getCenter() center of the viewport.
Vec2	getExtents() This is the half-width and half-height.
void	getScreenToWorld(Vec2 argScreen, Vec2 argWorld) takes the screen coordinates (argScreen) and puts the corresponding world coordinates in argWorld.
void	getScreenVectorToWorld(Vec2 argScreen, Vec2 argWorld) Transforms the given directional screen vector back to the world direction.
void	getWorldToScreen(Vec2 argWorld, Vec2 argScreen) takes the world coordinate (argWorld) puts the corresponding screen coordinate in argScreen.
void	getWorldVectorToScreen(Vec2 argWorld, Vec2 argScreen) Transforms the given directional vector by the viewport transform (not positional)
boolean	isYFlip()
void	setCamera(float x, float y, float scale) Sets the transform's center to the given x and y coordinates, and using the given scale.
void	setCenter(float x, float y) sets the center of the viewport.
void	setCenter(Vec2 argPos) sets the center of the viewport.
void	setExtents(float argHalfWidth, float argHalfHeight) This sets the half-width and half-height of the viewport.
void	setExtents(Vec2 argExtents) This sets the half-width and half-height.
void	setYFlip(boolean yFlip)

Method Detail

isYFlip

boolean isYFlip()

Returns:

if the transform flips the y axis

setYFlip

void setYFlip(boolean yFlip)

Parameters:

yFlip - if we flip the y axis when transforming

getExtents

Vec2 getExtents()

This is the half-width and half-height. This should be the actual half-width and half-height, not anything transformed or scaled. Not a copy.

Returns:

setExtents

void setExtents(Vec2 argExtents)

This sets the half-width and half-height. This should be the actual half-width and half-height, not anything transformed or scaled.

Parameters:

argExtents -

setExtents

void setExtents(float argHalfWidth,
                float argHalfHeight)

This sets the half-width and half-height of the viewport. This should be the actual half-width and half-height, not anything transformed or scaled.

Parameters:

argHalfWidth -

argHalfHeight -

getCenter

Vec2 getCenter()

center of the viewport. Not a copy.

Returns:

setCenter

void setCenter(Vec2 argPos)

sets the center of the viewport.

Parameters:

argPos -

setCenter

void setCenter(float x,
               float y)

sets the center of the viewport.

Parameters:

x -

y -

setCamera

void setCamera(float x,
               float y,
               float scale)

Sets the transform's center to the given x and y coordinates, and using the given scale.

Parameters:

x -

y -

scale -

getWorldVectorToScreen

void getWorldVectorToScreen(Vec2 argWorld,
                            Vec2 argScreen)

Transforms the given directional vector by the viewport transform (not positional)

Parameters:

argVec -

argOut -

getScreenVectorToWorld

void getScreenVectorToWorld(Vec2 argScreen,
                            Vec2 argWorld)

Transforms the given directional screen vector back to the world direction.

Parameters:

argVec -

argOut -

getWorldToScreen

void getWorldToScreen(Vec2 argWorld,
                      Vec2 argScreen)

takes the world coordinate (argWorld) puts the corresponding screen coordinate in argScreen. It should be safe to give the same object as both parameters.

Parameters:

argWorld -

argScreen -

getScreenToWorld

void getScreenToWorld(Vec2 argScreen,
                      Vec2 argWorld)

takes the screen coordinates (argScreen) and puts the corresponding world coordinates in argWorld. It should be safe to give the same object as both parameters.

Parameters:

argScreen -

argWorld -