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Mesh:setVertexAttribute

Available since LÖVE 0.10.0
This function is not supported in earlier versions.

Sets the properties of a specific attribute within a vertex in the Mesh.

Meshes without a custom vertex format specified in love.graphics.newMesh have position as their first attribute, texture coordinates as their second attribute, and color as their third attribute.

Function

Synopsis

Mesh:setVertexAttribute( vertexindex, attributeindex, value1, value2, ... )

Arguments

number vertexindex: The index of the the vertex to be modified.
number attributeindex: The index of the attribute within the vertex to be modified.
number value1: The new value for the first component of the attribute.
number value2: The new value for the second component of the attribute.
number ...: Any additional vertex attribute components.

Returns

Nothing.

Notes

Attribute components which exist within the attribute but are not specified as arguments default to 0 for attributes with the float data type, and 255 for the byte data type.

Examples

Modify the colors of a standard mesh after it's created.

-- Standard mesh with position, texture coordinates, and color attributes.
mesh = love.graphics.newMesh {
    {0,   0,    0, 0,  255, 255, 255, 255}, -- first vertex positioned at (0, 0)
    {400, 0,    0, 0,  255, 255, 255, 255}, -- second vertex positioned at (400, 0)
    {200, 400,  0, 0,  255, 255, 255, 255}, -- third vertex positioned at (200, 400)
}
 
local time = 0
 
function love.update(dt)
    time = time + dt
 
    for i = 1, mesh:getVertexCount() do
        -- The 3rd vertex attribute for a standard mesh is its color.
        mesh:setVertexAttribute(i, 3, (time * 10) % 255, 255, 255)
    end
end
 
function love.draw()
    love.graphics.draw(mesh)
end