Resource:Object preview

From Multi Theft Auto: Wiki

This resource lets you create an object that will be drawn on the screen provided size and position - just like when drawing an image. This way it is easy to create object preview on GUI (supports drawing in a separate render target). Works with peds, world objects and vehicles.

Overview

The resource itself adds exported client-side functions:

Exported functions

createObjectPreview

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Client

Creates the preview for provided world,ped or vehicle element. 

bool exports.object_preview:createObjectPreview(element object, float rotX, rotY, rotZ, projPosX, projPosY, projSizeX, projSizeY [, bool isRelative = false, postGUI = false, isSecRT = true])

Required Arguments

  • float rotX, rotY, rotZ: Object rotation in camera space.
  • float projPosX, projPosY: Projector left corner on the screen.
  • float projSizeX, projSizeY: Projector size.

Optional Arguments

  • bool isRelative: Are the projector parameters relative.
  • bool postGUI: Should the object be drawn before or after MTA GUI elements.
  • isSecRT: Should the object be drawin to second render target.

Returns

The function returns the element if set successfully, 'false' otherwise.

destroyObjectPreview

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Client

Destroys previously created preview - without destroying the object it was applied to. 

bool exports.object_preview:destroyObjectPreview(element objectPreviewElement)

Required Arguments

  • element objectPreviewElement: A previously declared preview element.

Returns

The function returns true if set successfully, false otherwise.

saveRTToFile

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Client

Save render target to png file. (Only when drawing to second render target is enabled) 

bool exports.object_preview:saveRTToFile(element objectPreviewElement, string path)

Required Arguments

  • element objectPreviewElement: A previously declared preview element.
  • string path: An exact client resource path the file is to be saved to.

Returns

The function returns true if set successfully, false otherwise. It saves the image in client resource path.

setRotation

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Client

This function sets object rotation. 

bool exports.object_preview:setRotation(element objectPreviewElement,float rotX, rotX, rotZ)

Required Arguments

  • element objectPreviewElement: A previously declared preview element.
  • float rotX, rotX, rotZ: Object rotation in camera space.

Returns

The function returns true if set successfully, false otherwise.

setProjection

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Client

This function sets object on screen position and size. 

bool exports.object_preview:setProjection(element objectPreviewElement, float projPosY, projSizeX, projSizeY [, bool isRelative = false])

Required Arguments

  • element objectPreviewElement: A previously declared preview element.
  • float projPosX, projPosY: Projector left corner on the screen.
  • float projSizeX, projSizeY: Projector size.

Optional Arguments

  • bool isRelative: Are the projector parameters relative.

Returns

The function returns true if set successfully, false otherwise.

setAlpha

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Client

This function sets object alpha transparency. 

bool exports.object_preview:setAlpha(element objectPreviewElement,int alpha)

Required Arguments

  • element objectPreviewElement: A previously declared preview element.
  • int alpha: Object alpha (0 - 255).

Returns

The function returns true if set successfully, false otherwise.

getRenderTarget

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Client

This function returns a renderTarget (Only when drawing to second render target is enabled) 

bool exports.object_preview:getRenderTarget()

Returns

The function returns render target if set successfully, false otherwise.

setDistanceSpread

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Client

This function sets the difference between object to camera distance set by MTA and that set by shader. 

bool exports.object_preview:setDistanceSpread(element objectPreviewElement,float zSpread)

Required Arguments

  • element objectPreviewElement: A previously declared preview element.
  • float zSpread: Object Distance spread.

Returns

The function returns true if set successfully, false otherwise.

setPositionOffsets

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Client

This function sets object position to camera offsets (standard is 0,0,0) 

bool exports.object_preview:setPositionOffsets(element objectPreviewElement,float posX, posX, posX)

Required Arguments

  • element objectPreviewElement: A previously declared preview element.
  • float posX, posX, posX: Object position to camera offsets.

Returns

The function returns true if set successfully, false otherwise.

setRotationOffsets

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Client

This function sets object rotation centre offsets (standard is 0,0,0) 

bool exports.object_preview:setRotationOffsets(element objectPreviewElement,float posX, posX, posX)

Required Arguments

  • element objectPreviewElement: A previously declared preview element.
  • float posX, posX, posX: Object rotation centre offsets.

Returns

The function returns true if set successfully, false otherwise.

Example

local scx, scy = guiGetScreenSize ()
local myObject,myElement, guiWindow = nil, nil, nil
local myRotation = {0,0,0}

addEventHandler("onClientResourceStart", getResourceRootElement( getThisResource()), function()
	local x1, y1, z1 = getCameraMatrix()
	myElement = createVehicle (429, x1, y1, z1)

	myObject = exports.objectPreview:createObjectPreview(myElement,0, 0, 0, 0.5, 0.5, 1, 1, true, true, true)
	guiWindow = guiCreateWindow((scx/2)-100,(scy/2) - 100,200,200, "Test area", false, false)
	guiSetAlpha(guiWindow, 0.05 + 0.2)
	local projPosX, projPosY = guiGetPosition(guiWindow,true)
	local projSizeX, projSizeY = guiGetSize(guiWindow, true)	
	exports.object_preview:setProjection(myObject,projPosX, projPosY, projSizeX, projSizeY,true,true)
	exports.object_preview:setRotation(myObject,myRotation[1], myRotation[2], myRotation[3])
	
	bindKey ( "num_4", "down", function() myRotation[1] = myRotation[1] - 5 end)
	bindKey ( "num_6", "down", function() myRotation[1] = myRotation[1] + 5 end)
	bindKey ( "num_add", "down", function() myRotation[2] = myRotation[2] - 5 end)
	bindKey ( "num_sub", "down", function() myRotation[2] = myRotation[2] + 5 end)
	bindKey ( "num_2", "down", function() myRotation[3] = myRotation[3] - 5 end)
	bindKey ( "num_8", "down", function() myRotation[3] = myRotation[3] + 5 end)
	bindKey ( "o", "down", function() exports.object_preview:saveRTToFile(myObject,math.random(100)..".png") end)
end)

addEventHandler("onClientPreRender", root, function()
	if not myElement or not myObject then return end
	local projPosX, projPosY = guiGetPosition(guiWindow,true)
	local projSizeX, projSizeY = guiGetSize(guiWindow, true)
	exports.object_preview:setProjection(myObject,projPosX, projPosY, projSizeX, projSizeY, true, true)
end, true, "high" )

addEventHandler("onClientResourceStop", getResourceRootElement( getThisResource()), function()
	exports.object_preview:destroyObjectPreview(myObject)
end
)

This creates a vehicle, applies object preview and scales it using dimensions of a window element.

Of course when you want to use these functions in your resources you have to include the object_preview resource in meta.

See Also

Object Preview resource on community

Retrieved from "https://wiki.multitheftauto.com/index.php?title=Resource:Object_preview&oldid=63879"