Pixel:setTexture
From GiderosMobile
Available since: Gideros 2016.12
Class: Pixel
Description
Associates a texture to the Pixel.
Pixel:setTexture(texture,slot,matrix)
Please note: slot is only useful in conjonction with Shader
Parameters
texture: (TextureBase or TextureRegion) the texture to associate to the pixel, or nil to deassociate
slot: (number) the texture slot that the texture should be associated to. Leave empty or set to 0 for main texture, or if you don't use a specific shader optional
matrix: (Matrix) an optional transform for the texture optional
Examples
2 textures masked in a Pixel
--!NEEDS:luashader/luashader.lua
application:setBackgroundColor(0x909090)
function vshaderpixslot(vVertex,vColor,vTexCoord) : Shader
local vertex = hF4(vVertex,0.0,1.0)
fTexCoord = vTexCoord
return vMatrix*vertex
end
function fshaderpixslot() : Shader
local frag = texture2D(fTexture, fTexCoord)
local frag2 = texture2D(fTexture2, fTexCoord)
return frag * frag2 -- mask
end
local shaderpixslot=Shader.lua(vshaderpixslot,fshaderpixslot,0,
{
{name="vMatrix", type=Shader.CMATRIX, sys=Shader.SYS_WVP, vertex=true},
{name="fTexture", type=Shader.CTEXTURE, vertex=false},
{name="fTexture2", type=Shader.CTEXTURE, vertex=false},
},
{
{name="vVertex", type=Shader.DFLOAT, mult=2, slot=0, offset=0},
{name="vColor", type=Shader.DUBYTE, mult=4, slot=1, offset=0},
{name="vTexCoord", type=Shader.DFLOAT, mult=2, slot=2, offset=0},
},
{
{name="fTexCoord", type=Shader.CFLOAT2},
}
)
local tex=Texture.new("gfx/test.png")
local tex2=Texture.new("gfx/arrow_0001.png")
local texw, texh = tex:getWidth(), tex:getHeight()
local px = Pixel.new(nil, texw, texh)
px:setTexture(tex, 0)
px:setTexture(tex2, 1)
px:setShader(shaderpixslot)
stage:addChild(px)
Change Pixel Texture slots on mouse hover
--!NEEDS:luashader/luashader.lua
-- bg
application:setBackgroundColor(0x00007f)
-- shader
function vshaderpixelslot(vVertex, vColor, vTexCoord) : Shader
local vertex = hF4(vVertex, 0.0, 1.0)
fTexCoord = vTexCoord
return vMatrix*vertex
end
function fshaderpixelslot() : Shader
local frag = texture2D(fTexture, fTexCoord)
local frag2 = texture2D(fTexture2, fTexCoord)
if slot == 0 then return frag
else return frag2
end
end
local shaderpixelslot=Shader.lua(vshaderpixelslot, fshaderpixelslot, 0,
{
{name="vMatrix", type=Shader.CMATRIX, sys=Shader.SYS_WVP, vertex=true},
{name="fTexture", type=Shader.CTEXTURE, vertex=false},
{name="fTexture2", type=Shader.CTEXTURE, vertex=false},
{name="slot", type=Shader.CINT, vertex=false},
},
{
{name="vVertex", type=Shader.DFLOAT, mult=2, slot=0, offset=0},
{name="vColor", type=Shader.DUBYTE, mult=4, slot=1, offset=0},
{name="vTexCoord", type=Shader.DFLOAT, mult=2, slot=2, offset=0},
},
{
{name="fTexCoord", type=Shader.CFLOAT2},
}
)
-- textures
local texbtnup=Texture.new("gfx/ui/btn_01_up.png")
local texbtndown=Texture.new("gfx/ui/btn_01_down.png")
-- objects
local px = Pixel.new(texbtnup)
-- params
px:setTexture(texbtndown, 1) -- texture, slot
px:setShader(shaderpixelslot)
-- position
px:setPosition(8*4, 8*16)
-- order
stage:addChild(px)
-- listeners
local onenter, moving, onexit
px:addEventListener(Event.MOUSE_HOVER, function(ev)
if px:hitTestPoint(ev.x, ev.y, true) then -- enter
-- execute code only once *
onenter = not onenter
if not onenter then moving = true end
if not moving then
-- execute action only once
px:setShaderConstant("slot", Shader.CINT, 1, 1) -- button Down texture
else
onexit = true
end
else -- exit
onenter = false
moving = false
if onexit then
-- execute exit action only once
onexit = false
px:setShaderConstant("slot", Shader.CINT, 1, 0) -- button Up texture
end
end
ev:stopPropagation()
end)
