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Compass = {

connectors={},

map = nil,

widget = nil,

renderImage = nil,

helper = nil,

previousPosX = 0,

previousPosY = 0,

updateFrameCountDown = -1, --this is used for triggering delayed render updates. If it's more than zero, it's decreased each frame until it's zero, and a render is then carried out. If it's below zero nothing is done.

zoomInButton = nil,

anchor = nil

}

 

function Compass.Refresh_Clicked(args)

        Compass.helper:refresh()

        Compass.helper:getMap():render()

        return true

end

 

function Compass.ZoomIn_Clicked(args)

        local newResolution = Compass.helper:getMap():getResolution() - 0.2

        --prevent the user from zooming in to much (at which point only one pixel from the head of the avatar will be seen

        if newResolution > 0.2 then

                Compass.helper:getMap():setResolution(newResolution)

                Compass.helper:getMap():render()

                Compass.helper:refresh()

        end

        return true

end

function Compass.ZoomOut_Clicked(args)

        local newResolution = Compass.helper:getMap():getResolution() + 0.2

        --we'll use the arbitrary resolution of 5 as the max

        if newResolution < 5 then

                Compass.helper:getMap():setResolution(Compass.helper:getMap():getResolution() + 0.2)

                Compass.helper:getMap():render()

                Compass.helper:refresh()

        end

        return true

end

 

 

 

function Compass.repositionAtAvatar()

        local pos = emberOgre:getAvatar():getAvatarSceneNode():getPosition()

        Compass.helper:reposition(pos.x, pos.z)

end

 

function Compass.framestarted(frameEvent)

        if Compass.updateFrameCountDown > 0 then

                Compass.updateFrameCountDown = Compass.updateFrameCountDown - 1

                if Compass.updateFrameCountDown == 0 then

                        --if we haven't created any anchor yet, it means that the whole compass is uninitialized and needs to be shown, else we can just rerender the map

                        if Compass.anchor == nil then

                                Compass.initialize()

                        else

                                Compass.helper:getMap():render()

                                Compass.helper:refresh()

                        end

                        Compass.updateFrameCountDown = -1

                end

        end

end

 

function Compass.TerrainPageGeometryUpdated(page)

        --wait six frames until we rerender the map. This is a hack because apparently the event this listens for doesn't actually guarantee that the page will be rendered next frame. We need to add another event which is emitted when a page actually is rendered the first time.

        Compass.updateFrameCountDown = 6

end

 

function Compass.initialize()

        Compass.anchor = EmberOgre.Gui.CompassThirdPersonCameraAnchor:new_local(Compass.helper, emberOgre:getMainCamera():getCamera(), emberOgre:getMainCamera():getRootNode())

        if Compass.widget ~= nil then

                Compass.widget:show()

        end

end

 

function Compass.CreatedAvatarEntity(avatarEntity)

        connect(Compass.connectors, guiManager.EventFrameStarted, "Compass.framestarted")

end

 

function Compass.buildWidget()

        Compass.helperImpl = EmberOgre.Gui.RenderedCompassImpl:new_local()

 

        Compass.helper = EmberOgre.Gui.Compass:new_local(Compass.helperImpl)

        Compass.map = Compass.helper:getMap()

        

        

        Compass.buildCEGUIWidget()

        

        --don't show the compass here, instead wait until we've gotten some terrain (by listening 

        connect(Compass.connectors, emberOgre.EventCreatedAvatarEntity, "Compass.CreatedAvatarEntity")

        connect(Compass.connectors, emberOgre:getTerrainGenerator().EventTerrainPageGeometryUpdated, "Compass.TerrainPageGeometryUpdated")

 

end

 

-- Call this method to build the cegui widget.

function Compass.buildCEGUIWidget()

        Compass.widget = guiManager:createWidget()

        Compass.widget:loadMainSheet("Compass.layout", "Compass/")

        Compass.widget:setIsActiveWindowOpaque(false)

        Compass.renderImage = Compass.widget:getWindow("RenderImage")

        Compass.pointerImage = Compass.widget:getWindow("Pointer")

        

        local assetManager = EmberOgre.Gui.AssetsManager:new_local()

        

        --set up the main background image

        local texturePair = assetManager:createTextureImage(Compass.helperImpl:getTexture(), "CompassMap")

        if texturePair:hasData() then 

                Compass.renderImage:setProperty("Image", CEGUI.PropertyHelper:imageToString(texturePair:getTextureImage()))

        end

        

        --also set up the pointer image

        texturePair = assetManager:createTextureImage(Compass.helperImpl:getPointerTexture(), "CompassPointer")

        if texturePair:hasData() then 

                Compass.pointerImage:setProperty("Image", CEGUI.PropertyHelper:imageToString(texturePair:getTextureImage()))

        end

        

        Compass.widget:hide()

end

 

 

 

Compass.buildWidget()