movPlane

作者: 浪巅 | 来源:发表于2018-08-31 14:50 被阅读0次

    ThreeUI.prototype.draw = function() {

    if (!this.shouldReDraw) return;

    // Reset canvas

    if (this.clearRect) {

    this.context.clearRect(this.clearRect.x, this.clearRect.y, this.clearRect.width, this.clearRect.height);

    } else {

            this.context.clearRect(0, 0, this.width, this.height);

            this.contextMov.clearRect(0, 0, this.width, this.height);

    }

    var self = this;

    var length = this.displayObjects.length;

    for (var i = 0;i < length;i++) {

            if (!this.displayObjects[i].isMov)

                this.displayObjects[i].render(self.context);

            else

                this.displayObjects[i].render(self.contextMov);

    }

        // Make sure the texture gets re-drawn

    if (this.renderOnQuad) {

            this.texture.needsUpdate = true;

            this.textureMov.needsUpdate = true;

    }

    this.shouldReDraw = false;

    };

    clickHandler{

    coords = this.windowToUISpace(coords.x, coords.y);

        if (this.planeMov){

            var coordsMov = {x:coords.x,

                y: coords.y + this.planeMov.position.y/DPR + (this.planeMov.geometry.parameters.height/DPR - this.height)/2 };

        }

    var callbackQueue = [], callbackQueueMov = [];

    this.eventListeners.click.forEach(function(listener) {

    var displayObject = listener.displayObject;

    if (!displayObject.shouldReceiveEvents()) return;

    var bounds = displayObject.getBounds();

    if (!displayObject.isMov && ThreeUI.isInBoundingBox(coords.x, coords.y, bounds.x, bounds.y, bounds.width, bounds.height)) {

    // Put listeners in a queue first, so state changes do not impact checking other click handlers

    callbackQueue.push(listener);

            }

            else if (displayObject.isMov && ThreeUI.isInBoundingBox(coordsMov.x, coordsMov.y, bounds.x, bounds.y, bounds.width, bounds.height)) {

    // Put listeners in a queue first, so state changes do not impact checking other click handlers

    callbackQueueMov.push(listener);

    }

    });

    callbackQueue.forEach(function(listener){

    listener.callback.bind(listener.displayObject)();

        });

        if (callbackQueue.length === 0)

            callbackQueueMov.forEach(function(listener){

                listener.callback.bind(listener.displayObject)();

            });

    }

    var scope;

    var DPR = window.devicePixelRatio

    ThreeUI.prototype.addPlaneMov = function() {

        scope = this;

        this.startY = 0;

        this.enableMov();

        this.setPlaneMovHeight(this.height)

    }

    ThreeUI.prototype.setPlaneMovHeight = function(newHeight) {

        this.scene.remove(this.planeMov)

    var canvasMov = document.createElement('canvas');

    canvasMov.width = this.width * DPR

        canvasMov.height = newHeight * DPR

    this.contextMov = canvasMov.getContext('2d');

        this.contextMov.scale(DPR, DPR)

    this.textureMov = new THREE.Texture(canvasMov);

    var material = new THREE.MeshBasicMaterial({ map: this.textureMov });

        material.transparent = true;

        material.map.minFilter = THREE.LinearFilter;

    var planeGeo = new THREE.PlaneGeometry(canvasMov.width, canvasMov.height);

        this.planeMov = new THREE.Mesh(planeGeo, material);

        this.planeMov.matrixAutoUpdate = false;

        this.planeMov.translateY(-0.5*(newHeight - this.height)*DPR)

        this.planeMov.translateZ(-1)

        this.planeMov.updateMatrix()

        this.scene.add(this.planeMov);

    }

    ThreeUI.prototype.enableMov = function() {

        window.addEventListener('mousedown', onDown);

    }

    ThreeUI.prototype.disableMov = function() {

        window.removeEventListener('mousedown', onDown);

        window.removeEventListener('mousemove',onMove);

        window.removeEventListener('mouseup',onUp);       

    }

    function onDown(e) {

        scope.startY = e.clientY

        startPosY = scope.planeMov.position.y

        window.addEventListener('mousemove',onMove);

        window.addEventListener('mouseup',onUp);

    }

    function onMove(e) {

        moveY = scope.startY - e.clientY;

        moveY *= DPR

        scope.planeMov.position.y = startPosY + moveY;    scope.planeMov.updateMatrix()

        // console.log(scope.planeMov.position)

    }

    function onUp(e) {

        moveY = scope.startY - e.clientY;

        var maxY = (scope.planeMov.geometry.parameters.height - scope.height*DPR)/2

        var minY = -maxY

        if (scope.planeMov.position.y < minY) {

            scope.planeMov.position.y = minY;  scope.planeMov.updateMatrix()

        } else if (scope.planeMov.position.y > maxY) {

            scope.planeMov.position.y = maxY;  scope.planeMov.updateMatrix()

        }

        window.removeEventListener('mousemove',onMove);

        window.removeEventListener('mouseup',onUp);   

    };

    DisplayObject.prototype.setMovParent = function(parent) {

        this.parent = parent;

        this.isMov = true;

        var bounds = this.getBounds();

        if (bounds.y + bounds.height > this.ui.planeMov.geometry.parameters.height/window.devicePixelRatio){

            this.ui.setPlaneMovHeight(bounds.y + bounds.height)

        }

    }

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