X-Git-Url: https://gitweb.ps.run/cloth_sim/blobdiff_plain/19d9f67e228e9925958489574339448bb608c9db..959c350fb8cddf7d1b31907fcc1f7f99dad52f3e:/Scripts/cloth.js diff --git a/Scripts/cloth.js b/Scripts/cloth.js deleted file mode 100644 index db07ac3..0000000 --- a/Scripts/cloth.js +++ /dev/null @@ -1,147 +0,0 @@ -const MASS = 0.1; - -class Constraint { - constructor(p1, p2, distance) { - this.p1 = p1; - this.p2 = p2; - this.distance = distance; - } -} - -class Particle { - constructor(x, y, z, mass) { - this.position = new THREE.Vector3(x, y, z); - this.previous = new THREE.Vector3(x, y, z); - this.acceleration = new THREE.Vector3(0, 0, 0); - this.mass = mass; - } - addForce(force) { - - } - verlet(dt) { - - } -} - -class Cloth { - constructor(width, height, numPointsWidth, numPointsHeight) { - this.width = width; - this.height = height; - this.numPointsWidth = numPointsWidth; - this.numPointsHeight = numPointsHeight; - - /** - * distance between two vertices horizontally/vertically - * divide by the number of points minus one - * because there are (n - 1) lines between n vertices - */ - let stepWidth = width / (numPointsWidth - 1); - let stepHeight = height / (numPointsHeight - 1); - - /** - * iterate over the number of vertices in x/y axis - * and add a new Particle to "particles" - */ - this.particles = []; - for (let y = 0; y < numPointsHeight; y++) { - for (let x = 0; x < numPointsWidth; x++) { - this.particles.push( - new Particle( - (x - ((numPointsWidth-1)/2)) * stepWidth, - height - (y + ((numPointsHeight-1)/2)) * stepHeight, - 0, - MASS) - ); - } - } - - const REST_DIST_X = width / (numPointsWidth-1); - const REST_DIST_Y = height / (numPointsHeight-1); - - /** - * generate constraints (springs) - */ - this.constraints = []; - for (let y = 0; y < numPointsHeight; y++) { - for (let x = 0; x < numPointsWidth; x++) { - if (x < numPointsWidth-1) { - this.constraints.push(new Constraint( - this.particles[this.getVertexIndex(x, y)], - this.particles[this.getVertexIndex(x+1, y)], - REST_DIST_X - )); - } - if (x < numPointsWidth-1) { - this.constraints.push(new Constraint( - this.particles[this.getVertexIndex(x, y)], - this.particles[this.getVertexIndex(x, y+1)], - REST_DIST_Y - )); - } - } - } - } - generateGeometry() { - const geometry = new THREE.BufferGeometry(); - - const vertices = []; - const normals = []; - const indices = []; - - for (let particle of this.particles) { - vertices.push( - particle.position.x, - particle.position.y, - particle.position.z); - } - - const numPointsWidth = this.numPointsWidth; - const numPointsHeight = this.numPointsHeight; - - /** - * generate faces based on 4 vertices - * and 6 springs each - */ - for (let y = 0; y < numPointsHeight - 1; y++) { - for (let x = 0; x < numPointsWidth - 1; x++) { - indices.push( - this.getVertexIndex(x, y), - this.getVertexIndex(x+1, y), - this.getVertexIndex(x+1, y+1) - ); - indices.push( - this.getVertexIndex(x, y), - this.getVertexIndex(x+1, y+1), - this.getVertexIndex(x, y+1) - ); - } - } - - geometry.setIndex(indices); - geometry.setAttribute('position', new THREE.Float32BufferAttribute(vertices, 3)); - //geometry.setAttribute('normal', new THREE.Float32BufferAttribute(normals, 3)); - geometry.computeBoundingSphere(); - geometry.computeVertexNormals(); - - return geometry; - } - updateGeometry(geometry) { - - } - satisfyConstraints() { - - } - simulate() { - - } - /** - * helper function to calculate index of vertex - * in "vertices" array based on its x and y positions - * in the mesh - * @param {number} x - x index of vertex - * @param {number} y - y index of vertex - */ - getVertexIndex(x, y) { - return y * this.numPointsWidth + x; - } -} \ No newline at end of file