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https://github.com/robonen/canvas-3d.git
synced 2026-03-20 02:44:40 +00:00
feat(engine): integration rendering and inputs
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@@ -21,26 +21,48 @@ onMounted(() => {
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const centerX = sizeX / 2;
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const centerY = sizeY / 2;
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const figureSizeH = 200;
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const figureSizeW = 200;
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const points: Point[] = [
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[500, 500, 500, 1],
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[500, 500, 700, 1],
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[500, 700, 500, 1],
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[500, 700, 700, 1],
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[700, 500, 500, 1],
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[700, 500, 700, 1],
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[700, 700, 500, 1],
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[700, 700, 700, 1],
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[0, 0, figureSizeH, 1],
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[0, 100, 0, 1],
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[95.1, 30.9, 0, 1],
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[58.8, -80.9, 0, 1],
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[-58.8, -80.9, 0, 1],
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[-95.1, 30.9, 0, 1],
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];
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const faces: [number, number, number, number][] = [
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[0, 1, 3, 2],
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[0, 1, 5, 4],
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[0, 2, 6, 4],
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[1, 3, 7, 5],
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[2, 3, 7, 6],
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[4, 5, 7, 6],
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const faces = [
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[0, 1, 2],
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[0, 2, 3],
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[0, 3, 4],
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[0, 4, 5],
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[0, 5, 1],
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[1, 2, 3, 4, 5],
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];
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// Cube
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// const points: Point[] = [
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// [0, 0, 0, 1],
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// [0, 0, 100, 1],
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// [0, 100, 0, 1],
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// [0, 100, 100, 1],
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// [100, 0, 0, 1],
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// [100, 0, 100, 1],
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// [100, 100, 0, 1],
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// [100, 100, 100, 1],
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// ];
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//
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// const faces = [
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// [0, 1, 3, 2],
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// [0, 1, 5, 4],
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// [0, 2, 6, 4],
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// [1, 3, 7, 5],
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// [2, 3, 7, 6],
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// [4, 5, 7, 6],
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// ];
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// Rotate around X axis
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const rotateX = (angle: number): Point[] => {
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const rad = (angle * Math.PI) / 180;
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@@ -83,12 +105,35 @@ onMounted(() => {
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];
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};
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const rotate = (x: number, y: number, z: number): Point[] => {
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return mul([rotateX(x), rotateY(y), rotateZ(z)]);
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};
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// Translate
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const translate = (x: number, y: number, z: number): Point[] => {
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return [
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[1, 0, 0, x],
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[0, 1, 0, y],
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[0, 0, 1, z],
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[1, 0, 0, 0],
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[0, 1, 0, 0],
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[0, 0, 1, 0],
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[x, y, z, 1],
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];
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};
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// Scale
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const scaleMatrix = (x: number, y: number, z: number): Point[] => {
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return [
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[x, 0, 0, 0],
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[0, y, 0, 0],
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[0, 0, z, 0],
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[0, 0, 0, 1],
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];
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};
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const axonometryIsometric = (): Point[] => {
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return [
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[0.707, -0.408, 0, 0],
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[0, 0.816, 0, 0],
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[-0.707, -0.408, 1, 0],
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[0, 0, 0, 1],
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];
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};
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@@ -116,46 +161,52 @@ onMounted(() => {
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return result;
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};
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const mul = (matrices: Point[][]) => {
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let result = matrices[0];
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for (let i = 1; i < matrices.length; i++) {
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result = multiply(result, matrices[i]);
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}
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return result;
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};
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// Draw figure
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const drawFigure = (
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points: Point[],
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faces: [number, number, number, number][]
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) => {
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const drawFigure = (points: Point[], faces: number[][]) => {
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ctx.clearRect(0, 0, sizeX, sizeY);
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faces.forEach((face) => {
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for (const face of faces) {
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ctx.beginPath();
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ctx.moveTo(points[face[0]][0], points[face[0]][1]);
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ctx.lineTo(points[face[1]][0], points[face[1]][1]);
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ctx.lineTo(points[face[2]][0], points[face[2]][1]);
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ctx.lineTo(points[face[3]][0], points[face[3]][1]);
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for (let i = 0; i < face.length; i++) {
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const [x, y] = points[face[i]];
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if (i === 0) {
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ctx.moveTo(x, y);
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} else {
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ctx.lineTo(x, y);
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}
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}
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ctx.closePath();
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ctx.stroke();
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});
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}
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};
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// Rotation animation all axis in the center of the canvas
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let angle = 0;
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const animate = () => {
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const matrix = multiply(
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multiply(
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multiply(translate(centerX, centerY, 0), rotateX(angle)),
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rotateY(angle)
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),
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rotateZ(angle)
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useTransformations((translation, rotation, scale) => {
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drawFigure(
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mul([
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points,
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scaleMatrix(scale[0], scale[1], scale[2]),
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rotate(rotation[0], rotation[1], rotation[2]),
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translate(translation[0], translation[1], translation[2]),
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rotateX(-90),
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axonometryIsometric(),
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translate(centerX, centerY + figureSizeH / 2, 0),
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]),
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faces
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);
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const rotatedPoints = multiply(points, matrix);
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drawFigure(rotatedPoints, faces);
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angle += angle < 360 ? 1 : -360;
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requestAnimationFrame(animate);
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};
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animate();
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});
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});
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</script>
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@@ -26,6 +26,11 @@ const onChange = (event: Event) => {
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value.value = target.valueAsNumber;
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emit('change', value.value);
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};
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const reset = () => {
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value.value = defaultValue;
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emit('change', value.value);
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};
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</script>
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<template>
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@@ -51,7 +56,7 @@ const onChange = (event: Event) => {
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class="range__input"
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type="range"
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@input="onChange"
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@dblclick="value = defaultValue"
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@click.middle="reset"
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/>
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<div class="range__border">{{ max }}</div>
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</div>
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