Difference between revisions of "Geometry"

m
(Added example for emulating Quad:setViewport)
Line 45: Line 45:
 
* [[parent::love.graphics]]
 
* [[parent::love.graphics]]
 
* [[love.graphics.draw]]
 
* [[love.graphics.draw]]
 +
 +
== Examples ==
 +
=== Emulate 0.8.0's [[Quad:setViewport]] ===
 +
<source lang="lua">
 +
-- Quad:setViewport doesn't exist in 0.9.0+, but we can still create a function which does the same thing.
 +
-- The original image's width and height are needed as well, unlike with 0.8.0's Quad:setViewport.
 +
function setQuadViewport(geometry, x, y, w, h, sw, sh)
 +
geometry:setVertex(1, 0, 0, x/sw, y/sh)
 +
geometry:setVertex(2, 0, h, x/sw, (y+h)/sh)
 +
geometry:setVertex(3, w, h, (x+w)/sw, (y+h)/sh)
 +
geometry:setVertex(4, w, 0, (x+w)/sw, y/sh)
 +
end
 +
</source>
  
 
[[Category:Types]]
 
[[Category:Types]]

Revision as of 23:26, 21 August 2013

Available since LÖVE 0.9.0
This type is not supported in earlier versions.

A polygonal shape with texture coordinate information.

Geometries can be used to select part of a texture to draw. In this way, one large texture atlas can be loaded, and then split up into sub-images.

Geometries replace the old Quad type completely since they can do the same and more.

Constructors

None.

Functions

Object:release Immediately destroys the object's Lua reference. Added since 11.0
Object:type Gets the type of the object as a string.
Object:typeOf Checks whether an object is of a certain type.

Enums

Supertypes

See Also

Examples

Emulate 0.8.0's Quad:setViewport

-- Quad:setViewport doesn't exist in 0.9.0+, but we can still create a function which does the same thing.
-- The original image's width and height are needed as well, unlike with 0.8.0's Quad:setViewport.
function setQuadViewport(geometry, x, y, w, h, sw, sh)
	geometry:setVertex(1, 0, 0, x/sw, y/sh)
	geometry:setVertex(2, 0, h, x/sw, (y+h)/sh)
	geometry:setVertex(3, w, h, (x+w)/sw, (y+h)/sh)
	geometry:setVertex(4, w, 0, (x+w)/sw, y/sh)
end

Other Languages

--@todo: add Concept:Current to stuffs when done adding stuffs.