491 lines
17 KiB
JavaScript
491 lines
17 KiB
JavaScript
window.devicePixelRatio = window.devicePixelRatio || 1;
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SolvespaceCamera = function(renderWidth, renderHeight, scale, up, right, offset) {
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THREE.Camera.call(this);
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this.type = 'SolvespaceCamera';
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this.renderWidth = renderWidth;
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this.renderHeight = renderHeight;
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this.zoomScale = scale; /* Avoid namespace collision w/ THREE.Object.scale */
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this.up = up;
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this.right = right;
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this.offset = offset;
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this.depthBias = 0;
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this.updateProjectionMatrix();
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};
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SolvespaceCamera.prototype = Object.create(THREE.Camera.prototype);
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SolvespaceCamera.prototype.constructor = SolvespaceCamera;
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SolvespaceCamera.prototype.updateProjectionMatrix = function() {
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var temp = new THREE.Matrix4();
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var offset = new THREE.Matrix4().makeTranslation(this.offset.x, this.offset.y, this.offset.z);
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// Convert to right handed- do up cross right instead.
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var n = new THREE.Vector3().crossVectors(this.up, this.right);
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var rotate = new THREE.Matrix4().makeBasis(this.right, this.up, n);
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rotate.transpose();
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/* FIXME: At some point we ended up using row-major.
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THREE.js wants column major. Scale/depth correct unaffected b/c diagonal
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matrices remain the same when transposed. makeTranslation also makes
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a column-major matrix. */
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/* TODO: If we want perspective, we need an additional matrix
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here which will modify w for perspective divide. */
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var scale = new THREE.Matrix4().makeScale(2 * this.zoomScale / this.renderWidth,
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2 * this.zoomScale / this.renderHeight, this.zoomScale / 30000.0);
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temp.multiply(scale);
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temp.multiply(rotate);
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temp.multiply(offset);
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this.projectionMatrix.copy(temp);
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};
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SolvespaceCamera.prototype.NormalizeProjectionVectors = function() {
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/* After rotating, up and right may no longer be orthogonal.
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However, their cross product will produce the correct
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rotated plane, and we can recover an orthogonal basis. */
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var n = new THREE.Vector3().crossVectors(this.right, this.up);
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this.up = new THREE.Vector3().crossVectors(n, this.right);
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this.right.normalize();
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this.up.normalize();
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};
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SolvespaceCamera.prototype.rotate = function(right, up) {
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var oldRight = new THREE.Vector3().copy(this.right).normalize();
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var oldUp = new THREE.Vector3().copy(this.up).normalize();
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this.up.applyAxisAngle(oldRight, up);
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this.right.applyAxisAngle(oldUp, right);
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this.NormalizeProjectionVectors();
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}
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SolvespaceCamera.prototype.offsetProj = function(right, up) {
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var shift = new THREE.Vector3(right * this.right.x + up * this.up.x,
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right * this.right.y + up * this.up.y,
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right * this.right.z + up * this.up.z);
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this.offset.add(shift);
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}
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/* Calculate the offset in terms of up and right projection vectors
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that will preserve the world coordinates of the current mouse position after
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the zoom. */
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SolvespaceCamera.prototype.zoomTo = function(x, y, delta) {
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// Get offset components in world coordinates, in terms of up/right.
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var projOffsetX = this.offset.dot(this.right);
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var projOffsetY = this.offset.dot(this.up);
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/* Remove offset before scaling so, that mouse position changes
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proportionally to the model and independent of current offset. */
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var centerRightI = x/this.zoomScale - projOffsetX;
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var centerUpI = y/this.zoomScale - projOffsetY;
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var zoomFactor;
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/* Zoom 20% every 100 delta. */
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if(delta < 0) {
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zoomFactor = (-delta * 0.002 + 1);
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}
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else if(delta > 0) {
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zoomFactor = (delta * (-1.0/600.0) + 1)
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}
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else {
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return;
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}
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this.zoomScale = this.zoomScale * zoomFactor;
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var centerRightF = x/this.zoomScale - projOffsetX;
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var centerUpF = y/this.zoomScale - projOffsetY;
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this.offset.addScaledVector(this.right, centerRightF - centerRightI);
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this.offset.addScaledVector(this.up, centerUpF - centerUpI);
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}
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SolvespaceControls = function(object, domElement) {
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var _this = this;
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this.object = object;
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this.domElement = ( domElement !== undefined ) ? domElement : document;
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var threePan = new Hammer.Pan({event : 'threepan', pointers : 3, enable : false});
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var panAfterTap = new Hammer.Pan({event : 'panaftertap', enable : false});
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this.touchControls = new Hammer.Manager(domElement, {
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recognizers: [
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[Hammer.Pinch, { enable: true }],
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[Hammer.Pan],
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[Hammer.Tap],
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]
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});
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this.touchControls.add(threePan);
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this.touchControls.add(panAfterTap);
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var changeEvent = {
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type: 'change'
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};
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var startEvent = {
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type: 'start'
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};
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var endEvent = {
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type: 'end'
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};
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var _changed = false;
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var _mouseMoved = false;
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//var _touchPoints = new Array();
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var _offsetPrev = new THREE.Vector2(0, 0);
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var _offsetCur = new THREE.Vector2(0, 0);
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var _rotatePrev = new THREE.Vector2(0, 0);
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var _rotateCur = new THREE.Vector2(0, 0);
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// Used during touch events.
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var _rotateOrig = new THREE.Vector2(0, 0);
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var _offsetOrig = new THREE.Vector2(0, 0);
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var _prevScale = 1.0;
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this.handleEvent = function(event) {
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if (typeof this[event.type] == 'function') {
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this[event.type](event);
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}
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}
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function mousedown(event) {
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event.preventDefault();
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event.stopPropagation();
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switch (event.button) {
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case 0:
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_rotateCur.set(event.screenX/window.devicePixelRatio, event.screenY/window.devicePixelRatio);
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_rotatePrev.copy(_rotateCur);
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document.addEventListener('mousemove', mousemove, false);
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document.addEventListener('mouseup', mouseup, false);
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break;
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case 2:
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_offsetCur.set(event.screenX/window.devicePixelRatio, event.screenY/window.devicePixelRatio);
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_offsetPrev.copy(_offsetCur);
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document.addEventListener('mousemove', mousemove, false);
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document.addEventListener('mouseup', mouseup, false);
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break;
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default:
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break;
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}
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}
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function wheel( event ) {
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event.preventDefault();
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/* FIXME: Width and height might not be supported universally, but
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can be calculated? */
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var box = _this.domElement.getBoundingClientRect();
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object.zoomTo(event.clientX - box.width/2 - box.left,
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-(event.clientY - box.height/2 - box.top), event.deltaY);
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_changed = true;
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}
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function mousemove(event) {
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switch (event.button) {
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case 0:
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_rotateCur.set(event.screenX/window.devicePixelRatio, event.screenY/window.devicePixelRatio);
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var diff = new THREE.Vector2().subVectors(_rotateCur, _rotatePrev)
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.multiplyScalar(1 / object.zoomScale);
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object.rotate(-0.3 * Math.PI / 180 * diff.x * object.zoomScale,
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-0.3 * Math.PI / 180 * diff.y * object.zoomScale);
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_changed = true;
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_rotatePrev.copy(_rotateCur);
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break;
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case 2:
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_mouseMoved = true;
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_offsetCur.set(event.screenX/window.devicePixelRatio, event.screenY/window.devicePixelRatio);
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var diff = new THREE.Vector2().subVectors(_offsetCur, _offsetPrev)
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.multiplyScalar(1 / object.zoomScale);
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object.offsetProj(diff.x, -diff.y);
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_changed = true;
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_offsetPrev.copy(_offsetCur)
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break;
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}
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}
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function mouseup(event) {
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/* TODO: Opera mouse gestures will intercept this event, making it
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possible to have multiple mousedown events consecutively without
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a corresponding mouseup (so multiple viewports can be rotated/panned
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simultaneously). Disable mouse gestures for now. */
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event.preventDefault();
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event.stopPropagation();
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document.removeEventListener('mousemove', mousemove);
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document.removeEventListener('mouseup', mouseup);
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_this.dispatchEvent(endEvent);
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}
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function pan(event) {
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/* neWcur - prev does not necessarily equal (cur + diff) - prev.
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Floating point is not associative. */
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touchDiff = new THREE.Vector2(event.deltaX, event.deltaY);
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_rotateCur.addVectors(_rotateOrig, touchDiff);
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incDiff = new THREE.Vector2().subVectors(_rotateCur, _rotatePrev)
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.multiplyScalar(1 / object.zoomScale);
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object.rotate(-0.3 * Math.PI / 180 * incDiff.x * object.zoomScale,
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-0.3 * Math.PI / 180 * incDiff.y * object.zoomScale);
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_changed = true;
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_rotatePrev.copy(_rotateCur);
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}
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function panstart(event) {
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/* TODO: Dynamically enable pan function? */
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_rotateOrig.copy(_rotateCur);
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}
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function pinchstart(event) {
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_prevScale = event.scale;
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}
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function pinch(event) {
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/* FIXME: Width and height might not be supported universally, but
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can be calculated? */
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var box = _this.domElement.getBoundingClientRect();
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/* 16.6... pixels chosen heuristically... matches my touchpad. */
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if (event.scale < _prevScale) {
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object.zoomTo(event.center.x - box.width/2 - box.left,
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-(event.center.y - box.height/2 - box.top), 100/6.0);
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_changed = true;
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} else if (event.scale > _prevScale) {
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object.zoomTo(event.center.x - box.width/2 - box.left,
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-(event.center.y - box.height/2 - box.top), -100/6.0);
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_changed = true;
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}
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_prevScale = event.scale;
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}
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/* A tap will enable panning/disable rotate. */
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function tap(event) {
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panAfterTap.set({enable : true});
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_this.touchControls.get('pan').set({enable : false});
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}
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function panaftertap(event) {
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touchDiff = new THREE.Vector2(event.deltaX, event.deltaY);
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_offsetCur.addVectors(_offsetOrig, touchDiff);
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incDiff = new THREE.Vector2().subVectors(_offsetCur, _offsetPrev)
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.multiplyScalar(1 / object.zoomScale);
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object.offsetProj(incDiff.x, -incDiff.y);
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_changed = true;
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_offsetPrev.copy(_offsetCur);
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}
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function panaftertapstart(event) {
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_offsetOrig.copy(_offsetCur);
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}
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function panaftertapend(event) {
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panAfterTap.set({enable : false});
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_this.touchControls.get('pan').set({enable : true});
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}
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function contextmenu(event) {
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event.preventDefault();
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}
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this.update = function() {
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if (_changed) {
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_this.dispatchEvent(changeEvent);
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_changed = false;
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}
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}
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this.domElement.addEventListener('mousedown', mousedown, false);
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this.domElement.addEventListener('wheel', wheel, false);
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this.domElement.addEventListener('contextmenu', contextmenu, false);
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/* Hammer.on wraps addEventListener */
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// Rotate
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this.touchControls.on('pan', pan);
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this.touchControls.on('panstart', panstart);
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// Zoom
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this.touchControls.on('pinch', pinch);
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this.touchControls.on('pinchstart', pinchstart);
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//Pan
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this.touchControls.on('tap', tap);
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this.touchControls.on('panaftertapstart', panaftertapstart);
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this.touchControls.on('panaftertap', panaftertap);
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this.touchControls.on('panaftertapend', panaftertapend);
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}
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SolvespaceControls.prototype = Object.create(THREE.EventDispatcher.prototype);
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SolvespaceControls.prototype.constructor = SolvespaceControls;
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solvespace = function(obj, params) {
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var scene, edgeScene, camera, edgeCamera, renderer;
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var geometry, controls, material, mesh, edges;
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var width, height, scale, offset;
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var directionalLightArray = [];
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if (typeof params === "undefined" || !("width" in params)) {
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width = window.innerWidth;
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} else {
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width = params.width;
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}
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if (typeof params === "undefined" || !("height" in params)) {
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height = window.innerHeight;
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} else {
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height = params.height;
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}
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if (typeof params === "undefined" || !("scale" in params)) {
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scale = 5;
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} else {
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scale = params.scale;
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}
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if (typeof params === "undefined" || !("offset" in params)) {
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offset = new THREE.Vector3(0, 0, 0);
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} else {
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offset = params.offset;
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}
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width *= window.devicePixelRatio;
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height *= window.devicePixelRatio;
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domElement = init();
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render();
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return domElement;
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function init() {
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scene = new THREE.Scene();
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edgeScene = new THREE.Scene();
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camera = new SolvespaceCamera(width/window.devicePixelRatio,
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height/window.devicePixelRatio, scale, new THREE.Vector3(0, 1, 0),
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new THREE.Vector3(0.5, 0, -0.5).normalize(), offset);
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mesh = createMesh(obj);
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scene.add(mesh);
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edges = createEdges(obj);
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edgeScene.add(edges);
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for (var i = 0; i < obj.lights.d.length; i++) {
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var lightColor = new THREE.Color(obj.lights.d[i].intensity,
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obj.lights.d[i].intensity, obj.lights.d[i].intensity);
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var directionalLight = new THREE.DirectionalLight(lightColor, 1);
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directionalLight.position.set(obj.lights.d[i].direction[0],
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obj.lights.d[i].direction[1], obj.lights.d[i].direction[2]);
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directionalLightArray.push(directionalLight);
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scene.add(directionalLight);
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}
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var lightColor = new THREE.Color(obj.lights.a, obj.lights.a, obj.lights.a);
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var ambientLight = new THREE.AmbientLight(lightColor.getHex());
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scene.add(ambientLight);
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renderer = new THREE.WebGLRenderer({ antialias: true});
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renderer.setSize(width, height);
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renderer.autoClear = false;
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renderer.domElement.style = "width:"+width/window.devicePixelRatio+"px;height:"+height/window.devicePixelRatio+"px;";
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controls = new SolvespaceControls(camera, renderer.domElement);
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controls.addEventListener("change", render);
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controls.addEventListener("change", lightUpdate);
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animate();
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return renderer.domElement;
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}
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function animate() {
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requestAnimationFrame(animate);
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controls.update();
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}
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function render() {
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var context = renderer.getContext();
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camera.updateProjectionMatrix();
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renderer.clear();
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context.depthRange(0.1, 1);
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renderer.render(scene, camera);
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context.depthRange(0.1-(2/60000.0), 1-(2/60000.0));
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renderer.render(edgeScene, camera);
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}
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function lightUpdate() {
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var changeBasis = new THREE.Matrix4();
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// The original light positions were in camera space.
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// Project them into standard space using camera's basis
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// vectors (up, target, and their cross product).
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n = new THREE.Vector3().crossVectors(camera.up, camera.right);
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changeBasis.makeBasis(camera.right, camera.up, n);
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for (var i = 0; i < 2; i++) {
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var newLightPos = changeBasis.applyToVector3Array(
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[obj.lights.d[i].direction[0], obj.lights.d[i].direction[1],
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obj.lights.d[i].direction[2]]);
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directionalLightArray[i].position.set(newLightPos[0],
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newLightPos[1], newLightPos[2]);
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}
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}
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function createMesh(meshObj) {
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var geometry = new THREE.Geometry();
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var materialIndex = 0;
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var materialList = [];
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var opacitiesSeen = {};
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for (var i = 0; i < meshObj.points.length; i++) {
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geometry.vertices.push(new THREE.Vector3(meshObj.points[i][0],
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meshObj.points[i][1], meshObj.points[i][2]));
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}
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for (var i = 0; i < meshObj.faces.length; i++) {
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var currOpacity = ((meshObj.colors[i] & 0xFF000000) >>> 24) / 255.0;
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if (opacitiesSeen[currOpacity] === undefined) {
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opacitiesSeen[currOpacity] = materialIndex;
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materialIndex++;
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materialList.push(new THREE.MeshLambertMaterial({
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vertexColors: THREE.FaceColors,
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opacity: currOpacity,
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transparent: true,
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side: THREE.DoubleSide
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}));
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}
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geometry.faces.push(new THREE.Face3(meshObj.faces[i][0],
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meshObj.faces[i][1], meshObj.faces[i][2],
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[new THREE.Vector3(meshObj.normals[i][0][0],
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meshObj.normals[i][0][1], meshObj.normals[i][0][2]),
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new THREE.Vector3(meshObj.normals[i][1][0],
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meshObj.normals[i][1][1], meshObj.normals[i][1][2]),
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new THREE.Vector3(meshObj.normals[i][2][0],
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meshObj.normals[i][2][1], meshObj.normals[i][2][2])],
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new THREE.Color(meshObj.colors[i] & 0x00FFFFFF),
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opacitiesSeen[currOpacity]));
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}
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geometry.computeBoundingSphere();
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return new THREE.Mesh(geometry, new THREE.MultiMaterial(materialList));
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}
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function createEdges(meshObj) {
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var geometry = new THREE.Geometry();
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var material = new THREE.LineBasicMaterial();
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for (var i = 0; i < meshObj.edges.length; i++) {
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geometry.vertices.push(new THREE.Vector3(meshObj.edges[i][0][0],
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meshObj.edges[i][0][1], meshObj.edges[i][0][2]),
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new THREE.Vector3(meshObj.edges[i][1][0],
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meshObj.edges[i][1][1], meshObj.edges[i][1][2]));
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}
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geometry.computeBoundingSphere();
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return new THREE.LineSegments(geometry, material);
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}
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};
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