Difference between revisions of "love.graphics.line"
(→Draw a line from the center of the screen to the mouse pointer) |
(→Draw a zigzag line from a single table) |
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Line 62: | Line 62: | ||
end | end | ||
</source> | </source> | ||
+ | |||
+ | |||
+ | === Draw grid === | ||
+ | <source lang="lua"> | ||
+ | w = love.graphics.getWidth() -- window width | ||
+ | h = love.graphics.getHeight() -- window height | ||
+ | grid = {} | ||
+ | distance = 30 -- distance between lines | ||
+ | for x = distance, w, distance do | ||
+ | local line = {x, 0, x, h} -- vertical line | ||
+ | table.insert (grid, line) | ||
+ | end | ||
+ | for y = distance, h, distance do | ||
+ | local line = {0, y, w, y} -- horizontal line | ||
+ | table.insert (grid, line) | ||
+ | end | ||
+ | |||
+ | function draw_lines (lines) | ||
+ | for i, line in pairs (lines) do | ||
+ | love.graphics.line(line) | ||
+ | end | ||
+ | end | ||
+ | |||
+ | function love.draw() | ||
+ | draw_lines (grid) | ||
+ | end | ||
+ | </source> | ||
+ | |||
== See Also == | == See Also == | ||
* [[parent::love.graphics]] | * [[parent::love.graphics]] |
Revision as of 13:58, 13 June 2021
Draws lines between points.
Function
Synopsis
love.graphics.line( x1, y1, x2, y2, ... )
Arguments
number x1
- The position of first point on the x-axis.
number y1
- The position of first point on the y-axis.
number x2
- The position of second point on the x-axis.
number y2
- The position of second point on the y-axis.
number ...
- You can continue passing point positions to draw a polyline.
Returns
Nothing.
Function
Synopsis
love.graphics.line( points )
Arguments
table points
- A table of point positions, as described above.
Returns
Nothing.
Examples
Draw the outline of a simple trapezoid
function love.draw()
love.graphics.line(200,50, 400,50, 500,300, 100,300, 200,50) -- last pair is a repeat to complete the trapezoid
end
Draw a line from the center of the screen to the mouse pointer
w = love.graphics.getWidth() / 2 -- half the window width
h = love.graphics.getHeight() / 2 -- half the window height
function love.draw()
local mx, my = love.mouse.getPosition() -- current position of the mouse
love.graphics.line(w, h, mx, my)
end
Draw horizontal and vertical lines to the mouse pointer
w = love.graphics.getWidth() -- window width
h = love.graphics.getHeight() -- window height
function love.draw()
local mx, my = love.mouse.getPosition() -- current position of the mouse
love.graphics.line(0, my, w, my) -- horizontal line
love.graphics.line(mx, 0, mx, h) -- vertical line
end
Draw a zigzag line from a single table
sometable = {
100, 100,
200, 200,
300, 100,
400, 200,
}
function love.draw()
love.graphics.line(sometable)
end
Draw grid
w = love.graphics.getWidth() -- window width
h = love.graphics.getHeight() -- window height
grid = {}
distance = 30 -- distance between lines
for x = distance, w, distance do
local line = {x, 0, x, h} -- vertical line
table.insert (grid, line)
end
for y = distance, h, distance do
local line = {0, y, w, y} -- horizontal line
table.insert (grid, line)
end
function draw_lines (lines)
for i, line in pairs (lines) do
love.graphics.line(line)
end
end
function love.draw()
draw_lines (grid)
end
See Also
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