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[WIP] Add View Cube #27

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[WIP] Add View Cube #27

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62 changes: 61 additions & 1 deletion js/MainPage/CascadeView.js
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,23 @@ var Environment = function (goldenContainer) {
this.goldenContainer.layoutManager.eventHub.emit('Start');
}

// Draw Text to a Texture and spawn it as a Quad
this.createLabel = (text, x, y, z, size, color) => {
let canvas = document.createElement("canvas");
let context = canvas.getContext("2d");
context.font = "bold 96px arial";
context.textAlign = "center";
context.textBaseline = "middle";
context.fillStyle = color;
context.fillText (text, canvas.width / 2, canvas.height / 2);
let texture = new THREE.Texture(canvas); texture.needsUpdate = true;
let material = new THREE.MeshBasicMaterial({ map: texture, transparent: true });
let mesh = new THREE.Mesh(new THREE.PlaneGeometry(size, size, 1, 1), material);
mesh.renderOrder = 101;
mesh.position.set(x, y, z);
return mesh;
}

// Resize the container, canvas, and renderer when the window resizes
this.onWindowResize = function () {
this.goldenContainer.layoutManager.updateSize(window.innerWidth, window.innerHeight -
Expand Down Expand Up @@ -129,6 +146,20 @@ var CascadeEnvironment = function (goldenContainer) {
polygonOffsetFactor: 2.0,
polygonOffsetUnits: 1.0
});

// A special corner gizmo that controls the orientation of the camera
this.viewCube = new THREE.Mesh(
new THREE.BoxGeometry(1, 1, 1),
new THREE.MeshStandardMaterial(
{ color: 0x1f1f1f, depthTest: false, depthWrite: true, transparent: true }));
this.viewCube.renderOrder = 100;
this.viewCube.add(this.environment.createLabel("+X", 0.5, 0.0, 0.0, 1, /*"red" */"white").rotateY( 1.57));
this.viewCube.add(this.environment.createLabel("-X", -0.5, 0.0, 0.0, 1, /*"red" */"white").rotateY(-1.57));
this.viewCube.add(this.environment.createLabel("-Y", 0.0, 0.0, 0.5, 1, /*"green"*/"white"));
this.viewCube.add(this.environment.createLabel("+Y", 0.0, 0.0, -0.5, 1, /*"green"*/"white").rotateY( 3.14));
this.viewCube.add(this.environment.createLabel("+Z", 0.0, 0.5, 0.0, 1, /*"blue" */"white").rotateX(-1.57));
this.viewCube.add(this.environment.createLabel("-Z", 0.0, -0.5, 0.0, 1, /*"blue" */"white").rotateX( 1.57));
this.environment.scene.add(this.viewCube);

// A callback to load the Triangulated Shape from the Worker and add it to the Scene
messageHandlers["combineAndRenderShapes"] = ([facelist, edgelist]) => {
Expand Down Expand Up @@ -288,7 +319,7 @@ var CascadeEnvironment = function (goldenContainer) {
this.mouse = { x: 0, y: 0 };
this.goldenContainer.getElement().get(0).addEventListener('mousemove', (event) => {
this.mouse.x = ( event.offsetX / this.goldenContainer.width ) * 2 - 1;
this.mouse.y = - (event.offsetY / this.goldenContainer.height) * 2 + 1;
this.mouse.y = - ( event.offsetY / this.goldenContainer.height ) * 2 + 1;
}, false );

this.animate = function animatethis() {
Expand Down Expand Up @@ -336,6 +367,35 @@ var CascadeEnvironment = function (goldenContainer) {
this.environment.viewDirty = this.handles[i].dragging || this.environment.viewDirty;
}
}

// Rotate the camera with clicks from the view cube
if (this.targetDirection) {
let fullDelta = new THREE.Quaternion().setFromUnitVectors(
this.environment.camera.getWorldDirection().clone().negate(),
this.targetDirection);
let workingQuat = new THREE.Quaternion();
if (workingQuat.angleTo(fullDelta) > 0.01) {
workingQuat.slerp(fullDelta, 0.2);
} else {
this.targetDirection = null;
}

this.environment.camera.position.copy(this.environment.camera.position.clone()
.sub(this.environment.controls.target)
.applyQuaternion(workingQuat)
.add(this.environment.controls.target));

this.environment.viewDirty = true;
this.environment.controls.update();
}

// Place the View Cube in the Corner and Interpret Clicks
this.environment.camera.updateMatrixWorld();
this.viewCube.position.copy(new THREE.Vector3(-0.75, 0.75, 0.75).unproject(this.environment.camera));
let intersects = this.raycaster.intersectObject(this.viewCube);
if (intersects.length > 0 && this.environment.controls.state === 0) {
this.targetDirection = intersects[0].face.normal;
}

// Only render the Three.js Viewport if the View is Dirty
// This saves on rendering time/cost now, but may
Expand Down