How to show Mesh?

Artiom

Hello,
I have a some trouble with Mesh, can't figure out how to show it.
My code:

local screenOffsetX = application:getLogicalTranslateX() / application:getLogicalScaleX()
local screenOffsetY = application:getLogicalTranslateY() / application:getLogicalScaleY()

local backgroundMesh = Mesh.new()

backgroundMesh:setVertex(1, 0 - screenOffsetX, 0 - screenOffsetY)
backgroundMesh:setVertex(2, application:getLogicalWidth() - screenOffsetX, 0 - screenOffsetY)
backgroundMesh:setVertex(3, application:getLogicalWidth() - screenOffsetX, application:getLogicalHeight() - screenOffsetY)

backgroundMesh:setColor(1, 0x127ef8)
backgroundMesh:setColor(2, 0x127ef8)
backgroundMesh:setColor(3, 0x127ef8)

stage:addChildAt(backgroundMesh, 1)

I can't see anything, what I'm doing wrong?
Thank you

ar2rsawseen

@Artiom only thing you need to add is to set the index array

backgroundMesh:setIndexArray(1,2,3)

Artiom

Oh.. thank you, that works

Artiom

Mesh can be only triangle? Can I make quad?

ar2rsawseen

Unfortunately no, thats is the limitation of the Mesh, that it can only be draw in triangles, thus you will need a triangulation algorithm to draw complex shapes.
For rectangle you would need two triangles.

local w, h = application:getContentWidth(), application:getContentHeight()   -- ------------------------------------------ -- Create Mesh -- ------------------------------------------   -- Create a new mesh object local mesh = Mesh.new()   -- set Vertices mesh:setVertices( 1, w*.25, h*.25, 2, w*.75, h*.25, 3, w*.75, h*.75, 4, w*.25, h*.75 )   -- set Indices mesh:setIndexArray( 1, 2, 3, 1, 3, 4 )   -- set Colors mesh:setColorArray( 0x000000, 1, 0x000000, 1, 0x00FFFF, 1, 0x00FFFF, 1 )   -- get bounds local x, y, w, h = mesh:getBounds(mesh)   -- create mesh-parent-stage hierarchy local parent = Sprite.new() parent:addChild(mesh) stage:addChild(parent)   -- calculate the center local cx = x + w / 2 local cy = y + h / 2   -- set the center parent:setPosition(cx, cy) mesh:setPosition(-cx, -cy)