297 lines
9.7 KiB
HTML
297 lines
9.7 KiB
HTML
<!doctype html>
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<!-- prototyped this in ~24 hours to help so i don't have to manually enter lists of coordinates for gameboy sprite animations -->
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<html>
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<head>
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<title>curve editor for gameboy animation</title>
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<style>
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body {
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display: flex;
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flex-direction: row;
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gap: 1em;
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}
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#controls {
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display: flex;
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flex-direction: column;
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gap: 1em;
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}
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</style>
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</head>
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<body>
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<svg
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viewBox="0 0 176 176"
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style="border: 1px solid black; display: block; max-height: 700px"
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xmlns:xlink="http://www.w3.org/1999/xlink">
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<defs>
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<g id="point">
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<rect id="sprite" x="-0.5" y="-0.5" width="8" height="8" stroke="none" fill="gray" fill-opacity="25%"/>
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<circle cx="0.5" cy="0.5" r="2" fill="black" fill-opacity="25%"/>
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<circle cx="0.5" cy="0.5" r="0.5" fill="black" fill-opacity="100%"/>
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</g>
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<pattern id="smallGrid" width="1" height="1" patternUnits="userSpaceOnUse">
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<path d="M 1 0 L 0 0 0 1" fill="none" stroke="darkseagreen" stroke-width="0.25"/>
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</pattern>
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<pattern id="grid" width="8" height="8" patternUnits="userSpaceOnUse">
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<rect width="8" height="8" fill="url(#smallGrid)"/>
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<path d="M 8 0 L 0 0 0 8" fill="none" stroke="darkseagreen" stroke-width="0.5"/>
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</pattern>
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</defs>
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<image
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id="background-container"
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width="160"
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height="144"
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x="8" y="16"
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opacity="50%"
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xlink:href="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" />
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<rect width="100%" height="100%" fill="url(#grid)" />
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<rect x="8" y="16" width="160" height="144" style="fill: none; stroke: darkseagreen; stroke-width: 0.5"/>
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<g id="lines">
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</g>
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<g id="sequence">
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</g>
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</svg>
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<div id="controls">
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<label for="background-selector">file for background</label>
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<input type="file" id="background-selector" name="background-selector"/>
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<fieldset>
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<legend>control mode</legend>
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<div>
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<input type="radio" name="mode" id="add" value="add" checked/>
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<label for="add"><strong>a</strong>dd points</label>
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</div>
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<div>
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<input type="radio" name="mode" id="delete" value="delete"/>
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<label for="delete"><strong>d</strong>elete points</label>
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</div>
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<div>
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<input type="radio" name="mode" id="move" value="move"/>
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<label for="move"><strong>g</strong>rab and move points</label>
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</div>
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</fieldset>
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<div>
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<label for="sprite_width">width in 8x8 sprites:</label>
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<input type="number"
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id="sprite_width"
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name="sprite_width"
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min="1" max="16" step="1" value="1"
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onchange="sprite_dims_change()"/>
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</div>
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<div>
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<label for="sprite_height">height in 8x8 sprites:</label>
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<input type="number"
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id="sprite_height"
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name="sprite_height"
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min="1" max="16" step="1" value="1"
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onchange="sprite_dims_change()"/>
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</div>
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<p>output is a length-prefixed list of y,x pairs.</p>
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<textarea id="output">db 0,</textarea>
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</div>
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</body>
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<script>
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var svg = null;
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var svg_group = null;
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var text_output = null;
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var moving_point_index = -1;
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var the_list = [];
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function length(dx, dy) {return Math.sqrt(dx*dx + dy*dy);}
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const clicksvg = (event) => {
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const mode = document.querySelector('input[name=mode]:checked').value; // either 'add', 'delete', or 'move'
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const {x, y} = dom_to_svg_coords(svg, event.clientX, event.clientY);
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if (mode == "add") {
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the_list.push({x: Number((x-0.5).toFixed()),y: Number((y-0.5).toFixed())});
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console.log(Number(x.toFixed()))
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regenerate_svg_list();
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regenerate_text_list();
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}
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if (mode == "delete") {
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let closest = -1;
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let distance = 3;
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the_list.forEach((point, index) => {
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let new_distance = length(point.x-x, point.y-y);
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if (new_distance < distance) {
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distance = new_distance;
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closest = index;
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}
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});
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if (closest != -1) {
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the_list.splice(closest, 1);
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}
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regenerate_svg_list();
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regenerate_text_list();
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}
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if (mode == "move" && moving_point_index != -1) {
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const elem = document.querySelector(`g#sequence use:nth-child(${moving_point_index+1})`);
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let newX = Number(Number(elem.getAttributeNS(null, "x")).toFixed());
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let newY = Number(Number(elem.getAttributeNS(null, "y")).toFixed());
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the_list[moving_point_index] = {x: newX, y: newY};
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moving_point_index = -1;
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regenerate_svg_list();
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regenerate_text_list();
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}
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}
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const mousemovesvg = (event) => {
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const mode = document.querySelector('input[name=mode]:checked').value; // either 'add', 'delete', or 'move'
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const {x, y} = dom_to_svg_coords(svg, event.clientX, event.clientY);
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if (mode == 'move' && moving_point_index != -1) {
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const previous_mouse_location = {x: event.clientX - event.movementX, y: event.clientY - event.movementY};
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const prev_location_in_gbspace = dom_to_svg_coords(svg, previous_mouse_location.x, previous_mouse_location.y);
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const gb_movement = {x: x - prev_location_in_gbspace.x, y: y - prev_location_in_gbspace.y};
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const point = the_list[moving_point_index];
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const elem = document.querySelector(`g#sequence use:nth-child(${moving_point_index+1})`);
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let newX = Number(elem.getAttributeNS(null, "x")) + gb_movement.x;
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let newY = Number(elem.getAttributeNS(null, 'y')) + gb_movement.y;
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elem.setAttributeNS(null, "x", newX);
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elem.setAttributeNS(null, "y", newY);
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const lineTo = document.querySelector(`g#lines line:nth-child(${moving_point_index})`);
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if (lineTo) {
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lineTo.setAttributeNS(null, "x2", newX+0.5);
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lineTo.setAttributeNS(null, "y2", newY+0.5);
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}
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const lineFrom = document.querySelector(`g#lines line:nth-child(${moving_point_index+1})`);
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if (lineFrom) {
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lineFrom.setAttributeNS(null, "x1", newX+0.5);
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lineFrom.setAttributeNS(null, "y1", newY+0.5);
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}
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}
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}
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const mousedownsvg = (event) => {
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const mode = document.querySelector('input[name=mode]:checked').value; // either 'add', 'delete', or 'move'
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const {x, y} = dom_to_svg_coords(svg, event.clientX, event.clientY);
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let closest = -1;
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let distance = 3;
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the_list.forEach((point, index) => {
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let new_distance = length(point.x-x, point.y-y);
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if (new_distance < distance) {
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distance = new_distance;
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closest = index;
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}
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});
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if (mode == 'move') {
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moving_point_index = closest;
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}
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}
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const changetextarea = (event) => {
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let raw = event.target.value;
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let stripped = raw.replace(/db [0-9]+,/, "");
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let pairs = stripped.matchAll(/ ?[0-9]+, ?[0-9]+/g);
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let splits = pairs.map((x) => x[0].split(/,/));
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let numbers = splits.map(([a, b]) => { return {y: Number(a), x: Number(b)}; } );
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the_list = [... numbers];
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regenerate_svg_list();
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regenerate_text_list();
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}
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const sprite_dims_change = (event) => {
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const width = document.querySelector('input#sprite_width').value;
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const height = document.querySelector('input#sprite_height').value;
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const rect = document.querySelector('g#point rect#sprite')
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rect.setAttributeNS(null, "width", width*8);
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rect.setAttributeNS(null, "height", height*8);
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}
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function regenerate_svg_list() {
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svg_group.textContent = '';
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for (const {x, y} of the_list) {
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const newcircle = document.createElementNS("http://www.w3.org/2000/svg", "use");
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newcircle.setAttributeNS(null, "href", "#point");
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newcircle.setAttributeNS(null, "x", x);
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newcircle.setAttributeNS(null, "y", y);
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svg_group.appendChild(newcircle);
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}
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document.querySelector('g#lines').textContent = '';
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for (const [second, first] of the_list.slice(1, the_list.length).map((e,i) => [e, the_list[i]])) {
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const newline = document.createElementNS("http://www.w3.org/2000/svg", "line");
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newline.setAttributeNS(null, "x1", first.x+0.5);
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newline.setAttributeNS(null, "y1", first.y+0.5);
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newline.setAttributeNS(null, "x2", second.x+0.5);
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newline.setAttributeNS(null, "y2", second.y+0.5);
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newline.setAttributeNS(null, "stroke", "black");
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newline.setAttributeNS(null, "stroke-width", "0.25");
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newline.setAttributeNS(null, "stroke-opacity", "50%");
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document.querySelector('g#lines').appendChild(newline);
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}
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}
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function regenerate_text_list() {
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s = `db ${the_list.length}, `;
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for (const {x, y} of the_list) {
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s += `${y}, ${x}, `;
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}
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text_output.value = s;
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}
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function dom_to_svg_coords(s, clientX, clientY) {
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// thanks to https://www.sitepoint.com/how-to-translate-from-dom-to-svg-coordinates-and-back-again/
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const pt = s.createSVGPoint();
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pt.x = clientX;
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pt.y = clientY;
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const svgP = pt.matrixTransform( s.getScreenCTM().inverse() );
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return svgP;
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}
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window.onload = () => {
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svg = document.querySelector('svg');
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svg.onclick = clicksvg;
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svg.onmousemove = mousemovesvg;
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svg.onmousedown = mousedownsvg;
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svg_group = document.querySelector('g#sequence');
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text_output = document.querySelector('textarea#output');
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text_output.onchange = changetextarea;
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sprite_dims_change();
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let filePicker = document.querySelector('input#background-selector');
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filePicker.onchange = (event) => {
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var file = event.target.files[0];
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// setting up the reader
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var reader = new FileReader();
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reader.readAsDataURL(file,'UTF-8');
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// here we tell the reader what to do when it's done reading...
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reader.onload = readerEvent => {
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var content = readerEvent.target.result; // this is the content!
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document
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.querySelector('image#background-container')
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.setAttributeNS("http://www.w3.org/1999/xlink", "href", content);
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}
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}
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if (filePicker.files[0]) {
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filePicker.onchange( {target: filePicker} );
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}
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document.onkeyup = (event) => {
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const add_radio = document.querySelector('input[name=mode]#add'); // either 'add', 'delete', or 'move'
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const delete_radio = document.querySelector('input[name=mode]#delete');
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const move_radio = document.querySelector('input[name=mode]#move');
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if (event.key == 'a') { add_radio.checked = true; }
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if (event.key == 'd') { delete_radio.checked = true; }
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if (event.key == 'g') { move_radio.checked = true; }
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}
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}
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</script>
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</html> |