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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Sprite Animation Viewer</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: Arial, sans-serif;
}
body {
background-color: #121212;
color: #e0e0e0;
padding: 20px;
display: flex;
flex-direction: column;
align-items: center;
min-height: 100vh;
}
.container {
width: 100%;
max-width: 900px;
background-color: #1e1e1e;
border-radius: 10px;
padding: 20px;
box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}
h1 {
text-align: center;
margin-bottom: 20px;
color: #3498db;
text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}
.settings {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
gap: 10px;
margin-bottom: 20px;
}
.form-group {
margin-bottom: 15px;
}
label {
display: block;
margin-bottom: 5px;
font-weight: bold;
color: #3498db;
}
input[type="number"], input[type="file"], input[type="range"] {
width: 100%;
padding: 8px;
border-radius: 5px;
border: 1px solid #333;
background-color: #2a2a2a;
color: #e0e0e0;
}
button {
background-color: #3498db;
color: #121212;
border: none;
padding: 10px 15px;
border-radius: 5px;
cursor: pointer;
font-weight: bold;
transition: all 0.3s;
margin-right: 10px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}
button:hover {
background-color: #2980b9;
transform: translateY(-2px);
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}
.controls {
display: flex;
justify-content: center;
align-items: center;
margin: 15px 0;
flex-wrap: wrap;
gap: 10px;
}
.canvas-container {
width: 100%;
display: flex;
justify-content: center;
margin-top: 20px;
border: 2px solid #3498db;
border-radius: 8px;
overflow: hidden;
box-shadow: 0 0 20px rgba(52, 152, 219, 0.2);
padding: 10px;
background-color: #0a0a0a;
}
canvas {
background-color: #0a0a0a;
max-width: 100%;
height: auto;
image-rendering: pixelated;
}
.sprite-info {
margin-top: 15px;
padding: 10px;
background-color: #242424;
border-radius: 5px;
border-left: 3px solid #3498db;
}
.fps-display {
margin-left: 10px;
font-weight: bold;
color: #3498db;
}
.preview-container {
margin-top: 20px;
display: flex;
flex-wrap: wrap;
gap: 10px;
justify-content: center;
}
.frame-preview {
border: 2px solid #333;
border-radius: 5px;
overflow: hidden;
cursor: pointer;
transition: transform 0.2s, border-color 0.2s;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}
.frame-preview:hover {
transform: scale(1.05);
}
.frame-preview.active {
border-color: #3498db;
box-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}
.full-sprite-preview-container {
margin-top: 15px;
padding: 15px;
background-color: #242424;
border-radius: 5px;
border-left: 3px solid #3498db;
}
.full-sprite-preview-container h3 {
margin-top: 0;
margin-bottom: 10px;
color: #3498db;
font-size: 16px;
}
.preview-area {
width: 100%;
overflow-x: auto;
overflow-y: auto;
background-color: #1a1a1a;
border-radius: 4px;
padding: 10px;
max-height: 200px;
display: flex;
justify-content: center;
align-items: center;
}
.preview-area img {
max-width: 100%;
max-height: 180px;
object-fit: contain;
image-rendering: pixelated;
}
.no-sprite-message {
color: #666;
text-align: center;
font-style: italic;
}
select.row-select {
width: 100%;
padding: 8px;
border-radius: 5px;
border: 1px solid #333;
background-color: #2a2a2a;
color: #e0e0e0;
cursor: pointer;
}
select.row-select:focus {
border-color: #3498db;
outline: none;
box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.3);
}
input[type="range"].slider {
-webkit-appearance: none;
appearance: none;
width: 100%;
height: 6px;
border-radius: 3px;
background: #1a1a1a;
outline: none;
margin-top: 8px;
}
input[type="range"].slider::-webkit-slider-thumb {
-webkit-appearance: none;
appearance: none;
width: 16px;
height: 16px;
border-radius: 50%;
background: #3498db;
cursor: pointer;
transition: all 0.2s;
}
input[type="range"].slider::-webkit-slider-thumb:hover {
background: #2980b9;
transform: scale(1.1);
}
input[type="range"].slider::-moz-range-thumb {
width: 16px;
height: 16px;
border-radius: 50%;
background: #3498db;
cursor: pointer;
border: none;
transition: all 0.2s;
}
input[type="range"].slider::-moz-range-thumb:hover {
background: #2980b9;
transform: scale(1.1);
}
.speed-control {
display: flex;
align-items: center;
gap: 10px;
}
.speed-control input[type="range"] {
flex: 1;
}
</style>
</head>
<body>
<div class="container">
<h1>Sprite Animation Viewer</h1>
<div class="settings">
<div class="form-group">
<label for="spriteFile">Upload Sprite Sheet:</label>
<input type="file" id="spriteFile" accept="image/png,image/jpeg">
</div>
<div class="form-group">
<label for="tileWidth" id="tileWidthLabel">Tile Width (px):</label>
<input type="number" id="tileWidth" value="64" min="1" max="512">
<input type="range" id="tileWidthSlider" min="1" max="512" value="64" class="slider" aria-labelledby="tileWidthLabel">
</div>
<div class="form-group">
<label for="tileHeight" id="tileHeightLabel">Tile Height (px):</label>
<input type="number" id="tileHeight" value="64" min="1" max="512">
<input type="range" id="tileHeightSlider" min="1" max="512" value="64" class="slider" aria-labelledby="tileHeightLabel">
</div>
<div class="form-group">
<label for="frameCount" id="frameCountLabel">Frame Count:</label>
<input type="number" id="frameCount" value="10" min="1" max="50">
<input type="range" id="frameCountSlider" min="1" max="50" value="10" class="slider" aria-labelledby="frameCountLabel">
</div>
<div class="form-group">
<label for="rowSelect">Color Variant:</label>
<select id="rowSelect" class="row-select">
<option value="0">Row 1</option>
<option value="1">Row 2</option>
<option value="2">Row 3</option>
<option value="3">Row 4</option>
<option value="4">Row 5</option>
</select>
</div>
<div class="form-group">
<label for="directionSelect">Animation Direction:</label>
<select id="directionSelect" class="row-select">
<option value="ltr">Left to Right</option>
<option value="rtl">Right to Left</option>
<option value="ttb">Top to Bottom</option>
<option value="btt">Bottom to Top</option>
<option value="alternate">Alternate (Ping-Pong)</option>
<option value="random">Random</option>
</select>
</div>
</div>
<div class="sprite-info" id="spriteInfo">
No sprite loaded yet.
</div>
<div class="full-sprite-preview-container">
<h3>Full Sprite Sheet Preview</h3>
<div class="preview-area" id="fullSpritePreview">
<p class="no-sprite-message">Upload a sprite sheet to see preview</p>
</div>
</div>
<div class="controls">
<button id="playPauseBtn" aria-label="Play animation">Play</button>
<button id="resetBtn" aria-label="Reset animation">Reset</button>
<div class="speed-control">
<label for="fpsRange" id="fpsLabel">Speed: </label>
<input type="range" id="fpsRange" min="1" max="60" value="10" aria-labelledby="fpsLabel">
<span class="fps-display" id="fpsDisplay" aria-live="polite">10 FPS</span>
</div>
</div>
<div class="canvas-container">
<canvas id="animationCanvas" aria-label="Sprite animation display"></canvas>
</div>
<div class="preview-container" id="framePreviewContainer" role="list" aria-label="Animation frames preview"></div>
</div>
<script>
// Get all the DOM elements we'll need
const spriteFileInput = document.getElementById('spriteFile');
const tileWidthInput = document.getElementById('tileWidth');
const tileHeightInput = document.getElementById('tileHeight');
const frameCountInput = document.getElementById('frameCount');
const tileWidthSlider = document.getElementById('tileWidthSlider');
const tileHeightSlider = document.getElementById('tileHeightSlider');
const frameCountSlider = document.getElementById('frameCountSlider');
const rowSelectInput = document.getElementById('rowSelect');
const directionSelectInput = document.getElementById('directionSelect');
const playPauseBtn = document.getElementById('playPauseBtn');
const resetBtn = document.getElementById('resetBtn');
const fpsRange = document.getElementById('fpsRange');
const fpsDisplay = document.getElementById('fpsDisplay');
const canvas = document.getElementById('animationCanvas');
const ctx = canvas.getContext('2d');
const spriteInfo = document.getElementById('spriteInfo');
const framePreviewContainer = document.getElementById('framePreviewContainer');
const fullSpritePreview = document.getElementById('fullSpritePreview');
// Animation state
let spriteImage = null;
let currentFrame = 0;
let isPlaying = false;
let animationInterval = null;
let fps = 10;
let currentRow = 0; // Track which row/color variant is selected
let direction = 'ltr'; // Animation direction
let isReversing = false; // For alternating animation
// Initialize with default sizes
canvas.width = 128;
canvas.height = 128;
// Handle file upload
spriteFileInput.addEventListener('change', (e) => {
const file = e.target.files[0];
if (file) {
// Create image from uploaded file
const reader = new FileReader();
reader.onload = (event) => {
spriteImage = new Image();
spriteImage.onload = () => {
updateSpriteInfo();
updateFullSpritePreview();
reset();
createFramePreviews();
};
spriteImage.src = event.target.result;
};
reader.readAsDataURL(file);
}
});
// Update the full sprite sheet preview
function updateFullSpritePreview() {
fullSpritePreview.innerHTML = '';
if (!spriteImage) {
fullSpritePreview.innerHTML = '<p class="no-sprite-message">Upload a sprite sheet to see preview</p>';
return;
}
// Create a copy of the sprite image for the preview
const previewImg = document.createElement('img');
previewImg.src = spriteImage.src;
previewImg.alt = 'Full sprite sheet preview';
// Add the image to the preview container
fullSpritePreview.appendChild(previewImg);
}
// Update sprite sheet information display
function updateSpriteInfo() {
if (!spriteImage) return;
const tileWidth = parseInt(tileWidthInput.value);
const tileHeight = parseInt(tileHeightInput.value);
const frameCount = parseInt(frameCountInput.value);
// Update canvas size to match tile size (scaled up by 2x for better visibility)
canvas.width = tileWidth * 2;
canvas.height = tileHeight * 2;
// Calculate how many frames can fit in the image
const framesPerRow = Math.floor(spriteImage.width / tileWidth);
const totalRows = Math.floor(spriteImage.height / tileHeight);
const maxPossibleFrames = framesPerRow * totalRows;
// Update the row selector to match the actual number of rows in the sprite sheet
rowSelectInput.innerHTML = '';
for (let i = 0; i < totalRows; i++) {
const option = document.createElement('option');
option.value = i;
option.textContent = `Row ${i+1} ${i === 0 ? '(Top)' : i === totalRows-1 ? '(Bottom)' : ''}`;
rowSelectInput.appendChild(option);
}
spriteInfo.innerHTML = `
Sprite Sheet: ${spriteImage.width}x${spriteImage.height}px<br>
Tile Size: ${tileWidth}x${tileHeight}px<br>
Frames: ${frameCount} per row<br>
Rows/Variants: ${totalRows}<br>
Layout: ${framesPerRow} frames per row<br>
Animation: ${getDirectionDescription()}
`;
// Set current row to match the select value
currentRow = parseInt(rowSelectInput.value);
}
// Get a user-friendly description of the current animation direction
function getDirectionDescription() {
switch (directionSelectInput.value) {
case 'ltr': return 'Left to Right';
case 'rtl': return 'Right to Left';
case 'ttb': return 'Top to Bottom';
case 'btt': return 'Bottom to Top';
case 'alternate': return 'Alternating (Ping-Pong)';
case 'random': return 'Random Frame Order';
default: return 'Left to Right';
}
}
// Create individual frame previews
function createFramePreviews() {
framePreviewContainer.innerHTML = '';
if (!spriteImage) return;
const tileWidth = parseInt(tileWidthInput.value);
const tileHeight = parseInt(tileHeightInput.value);
const frameCount = parseInt(frameCountInput.value);
const row = currentRow;
for (let i = 0; i < frameCount; i++) {
// Create a canvas for each frame preview
const previewCanvas = document.createElement('canvas');
previewCanvas.width = tileWidth;
previewCanvas.height = tileHeight;
previewCanvas.style.width = '64px'; // Smaller display size
previewCanvas.style.height = '64px';
previewCanvas.className = 'frame-preview';
previewCanvas.setAttribute('role', 'listitem');
previewCanvas.setAttribute('aria-label', `Frame ${i+1}`);
if (i === currentFrame) {
previewCanvas.classList.add('active');
previewCanvas.setAttribute('aria-current', 'true');
}
const previewCtx = previewCanvas.getContext('2d');
previewCtx.imageSmoothingEnabled = false;
// Calculate position in sprite sheet
const framesPerRow = Math.floor(spriteImage.width / tileWidth);
const col = i % framesPerRow;
// Draw the frame from the current row
previewCtx.drawImage(
spriteImage,
col * tileWidth,
row * tileHeight,
tileWidth,
tileHeight,
0,
0,
tileWidth,
tileHeight
);
// Add click handler to select frame
previewCanvas.addEventListener('click', () => {
currentFrame = i;
updateActivePreviews();
drawFrame();
});
framePreviewContainer.appendChild(previewCanvas);
}
}
// Update which preview is marked as active
function updateActivePreviews() {
const previews = document.querySelectorAll('.frame-preview');
previews.forEach((preview, index) => {
if (index === currentFrame) {
preview.classList.add('active');
preview.setAttribute('aria-current', 'true');
} else {
preview.classList.remove('active');
preview.removeAttribute('aria-current');
}
});
}
// Draw the current frame
function drawFrame() {
if (!spriteImage) return;
ctx.clearRect(0, 0, canvas.width, canvas.height);
const tileWidth = parseInt(tileWidthInput.value);
const tileHeight = parseInt(tileHeightInput.value);
const frameCount = parseInt(frameCountInput.value);
const row = currentRow;
// Ensure currentFrame is within bounds
currentFrame = currentFrame % frameCount;
// Calculate position in sprite sheet
const framesPerRow = Math.floor(spriteImage.width / tileWidth);
const col = currentFrame % framesPerRow;
// Draw the frame - maintain crisp pixel art by using imageSmoothingEnabled = false
ctx.imageSmoothingEnabled = false;
ctx.drawImage(
spriteImage,
col * tileWidth,
row * tileHeight,
tileWidth,
tileHeight,
0,
0,
canvas.width,
canvas.height
);
updateActivePreviews();
// Update canvas aria-label for accessibility
canvas.setAttribute('aria-label', `Sprite animation display - Frame ${currentFrame + 1} of ${frameCount}, Row ${currentRow + 1}, Direction: ${getDirectionDescription()}`);
}
// Animation loop
function animate() {
if (!isPlaying) return;
clearInterval(animationInterval);
animationInterval = setInterval(() => {
// Update the current frame based on direction
updateFrameBasedOnDirection();
drawFrame();
}, 1000 / fps);
}
// Update the frame based on selected direction
function updateFrameBasedOnDirection() {
const frameCount = parseInt(frameCountInput.value);
direction = directionSelectInput.value;
switch (direction) {
case 'ltr':
// Left to right (increment frame horizontally)
currentFrame = (currentFrame + 1) % frameCount;
break;
case 'rtl':
// Right to left (decrement frame horizontally)
currentFrame = (currentFrame - 1 + frameCount) % frameCount;
break;
case 'ttb':
// Top to bottom (increment row)
currentFrame = currentFrame; // Keep the same frame
const totalRows = Math.floor(spriteImage.height / parseInt(tileHeightInput.value));
currentRow = (currentRow + 1) % totalRows;
break;
case 'btt':
// Bottom to top (decrement row)
currentFrame = currentFrame; // Keep the same frame
const rows = Math.floor(spriteImage.height / parseInt(tileHeightInput.value));
currentRow = (currentRow - 1 + rows) % rows;
break;
case 'alternate':
// Ping-pong between first and last frame
if (!isReversing) {
currentFrame++;
if (currentFrame >= frameCount - 1) {
isReversing = true;
}
} else {
currentFrame--;
if (currentFrame <= 0) {
isReversing = false;
}
}
break;
case 'random':
// Jump to a random frame
let newFrame;
do {
newFrame = Math.floor(Math.random() * frameCount);
} while (newFrame === currentFrame && frameCount > 1);
currentFrame = newFrame;
break;
}
}
// Play/Pause button
playPauseBtn.addEventListener('click', () => {
isPlaying = !isPlaying;
playPauseBtn.textContent = isPlaying ? 'Pause' : 'Play';
playPauseBtn.setAttribute('aria-label', isPlaying ? 'Pause animation' : 'Play animation');
if (isPlaying) {
animate();
} else {
clearInterval(animationInterval);
}
});
// Reset button
resetBtn.addEventListener('click', reset);
function reset() {
currentFrame = 0;
isReversing = false; // Reset the alternating direction state
drawFrame();
}
// FPS (speed) control
fpsRange.addEventListener('input', (e) => {
fps = parseInt(e.target.value);
fpsDisplay.textContent = `${fps} FPS`;
if (isPlaying) {
animate();
}
});
// Update when parameters change
tileWidthInput.addEventListener('input', () => {
tileWidthSlider.value = tileWidthInput.value;
updateSpriteInfo();
createFramePreviews();
drawFrame();
});
tileHeightInput.addEventListener('input', () => {
tileHeightSlider.value = tileHeightInput.value;
updateSpriteInfo();
createFramePreviews();
drawFrame();
});
frameCountInput.addEventListener('input', () => {
frameCountSlider.value = frameCountInput.value;
updateSpriteInfo();
createFramePreviews();
drawFrame();
});
// Slider event listeners
tileWidthSlider.addEventListener('input', () => {
tileWidthInput.value = tileWidthSlider.value;
updateSpriteInfo();
createFramePreviews();
drawFrame();
});
tileHeightSlider.addEventListener('input', () => {
tileHeightInput.value = tileHeightSlider.value;
updateSpriteInfo();
createFramePreviews();
drawFrame();
});
frameCountSlider.addEventListener('input', () => {
frameCountInput.value = frameCountSlider.value;
updateSpriteInfo();
createFramePreviews();
drawFrame();
});
// Listen for row selection changes
rowSelectInput.addEventListener('change', () => {
currentRow = parseInt(rowSelectInput.value);
createFramePreviews();
drawFrame();
});
// Listen for direction selection changes
directionSelectInput.addEventListener('change', () => {
// Update direction - the actual change happens in the animation loop
direction = directionSelectInput.value;
// Reset alternating state when changing direction
isReversing = false;
// Create new frame previews if we've changed to a vertical animation
if (direction === 'ttb' || direction === 'btt') {
createFramePreviews();
}
// If we're actively playing, restart the animation with the new direction
if (isPlaying) {
animate();
}
// Update the sprite info to show the new direction
if (spriteImage) {
updateSpriteInfo();
}
});
// Initial drawing
drawFrame();
</script>
</body>
</html> |