51 lines
No EOL
3 KiB
HTML
51 lines
No EOL
3 KiB
HTML
<!doctype html>
|
||
<html lang="en">
|
||
<head>
|
||
<meta charset="utf-8">
|
||
<meta name="viewport" content="width=device-width, initial-scale=1">
|
||
<title>Screen.put_pixel — Ludic</title>
|
||
<meta name="description" content="Set a single pixel at a pixel coordinate to one color.">
|
||
<link rel="stylesheet" href="base.css">
|
||
<link rel="stylesheet" href="docs.css">
|
||
</head>
|
||
<body>
|
||
<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
|
||
<main class="wrap item">
|
||
<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-screen.html">Screen — drawing</a> <span>›</span> <span class="here">Screen.put_pixel</span></div>
|
||
<div class="item-head">
|
||
<span class="kind-badge kind-method">method</span>
|
||
<h1 id="top">Screen.put_pixel</h1>
|
||
</div>
|
||
<code class="sig">Screen.put_pixel(x, y, color)</code>
|
||
<div class="desc"><p>Sets exactly one pixel at <code>(x, y)</code> to the given color — the finest-grained drawing operation Ludic offers. Reach for it when you are plotting individual points such as stars, particles, a scatter of sparks, or hand-drawn curves where a full rectangle would be too coarse. For anything larger than a point prefer <code>Screen.fill_rectangle</code>, since one call per pixel is far more expensive than one call per block. Coordinates are pixels from the top-left of the screen, and out-of-range coordinates are ignored.</p></div>
|
||
<div class="params"><h2>Parameters</h2><div class="param" id="param-x"><code class="pname">x</code><span class="pdesc">the pixel column, in pixels from the left of the screen</span></div><div class="param" id="param-y"><code class="pname">y</code><span class="pdesc">the pixel row, in pixels from the top of the screen</span></div><div class="param" id="param-color"><code class="pname">color</code><span class="pdesc">the pixel color, e.g. a <code>Color.*</code> name or a <code>0xRRGGBB</code> literal</span></div></div>
|
||
<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Starfield {
|
||
property Position { column: int = 0, row: int = 0 }
|
||
model Star { Position }
|
||
|
||
handler SeedStars phase Start {
|
||
Random.seed(value: 1)
|
||
for spawn_index in 0 .. 40 {
|
||
spawn Star {
|
||
Position {
|
||
column: Random.range(low: 0, high: 255),
|
||
row: Random.range(low: 0, high: 223)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
handler DrawWorld phase Render {
|
||
Screen.clear(Color.MidnightBlue)
|
||
for (Position) in query [Position, {Star}] {
|
||
Screen.put_pixel(x: Position.column, y: Position.row, color: Color.White)
|
||
}
|
||
Screen.show()
|
||
}
|
||
}</pre></div>
|
||
|
||
<a class="back" href="api.html">← All symbols</a>
|
||
</main>
|
||
<script src="ludic-highlight.js"></script>
|
||
<script>Ludic.highlightAll(); Ludic.installCards(); Ludic.flashTarget();</script>
|
||
</body></html> |