Viewport

Supported platforms:
Available since: Gideros 2016.04
Inherits from: Sprite

Description

A Viewport sprite allows to display another view of a tree hierarchy already on stage. Sprites can't have two parents, but thanks to Viewport you can display the same Sprite twice on the stage.

Useful for split screen games, mini maps and so on.

Example

Displaying same Bitmap in multiple views

-- content we want to display in multiple views
local content = Bitmap.new(Texture.new("ball.png"))

-- now setup view 1 as a 300x300 window
view1=Viewport.new()
view1:setClip(0,0,300,300)
view1:setContent(content)
-- add some transformations, just to see the difference
view1:setTransform(Matrix.new(1.7320507764816, -1.0000001192093, 1.0000001192093, 1.7320507764816, 50, 50))
-- add view to stage
stage:addChild(view1)

-- now setup view 2 as a 200x200 window
view2=Viewport.new()
view2:setClip(0,0,200,200)
view2:setPosition(0,300) -- lower down the screen
view2:setContent(content)
-- add some transformations, just to see the difference
view2:setTransform(Matrix.new(0.32139378786087, -0.38302224874496, 0.38302224874496, 0.32139378786087, 30, 30))
-- add view to stage
stage:addChild(view2)

Methods Viewport.new creates a new viewport Viewport:lookAngles sets up the viewport look angle transform matrix (eye position, pitch, yaw and roll angles) Viewport:lookAt sets up the viewport look at transform matrix (eye, target position and up direction) Viewport:setClip sets the viewport size Viewport:setContent sets the viewport content (sprite) Viewport:setProjection specifies a projection matrix to use when displaying the content Viewport:setTarget sets a rt as target Viewport:setTransform sets the content transform matrix before it being displayed

Events Constants

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