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p5.easycam.ts
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p5.easycam.ts
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/*
*
* The p5.EasyCam library - Easy 3D CameraControl for p5.js and WEBGL.
*
* Copyright © 2017-2021 by p5.EasyCam authors
*
* Source: https://github.com/freshfork/p5.EasyCam
*
* MIT License: https://opensource.org/licenses/MIT
*
*
* explanatory notes:
*
* p5.EasyCam is a derivative of the original PeasyCam Library by Jonathan Feinberg
* and combines new useful features with the great look and feel of its parent.
*
*/
"use strict";
import p5 from "p5";
type Vec3 = [number, number, number];
type Vec4 = [number, number, number, number];
/** @namespace */
export namespace Dw {
/**
* EasyCam Library Info
*/
const INFO = {
/** name */ LIBRARY: "p5.EasyCam",
/** version */ VERSION: "1.2.0",
/** author */ AUTHOR: "p5.EasyCam authors",
/** source */ SOURCE: "https://github.com/freshfork/p5.EasyCam",
toString() {
return `${this.LIBRARY} v${this.VERSION} by ${this.AUTHOR} (${this.SOURCE})`;
},
};
/**
* EasyCam
*
* <pre>
*
* new Dw.EasyCam(p5.RendererGL, {
* distance : z, // scalar
* center : [x, y, z], // vector
* rotation : [q0, q1, q2, q3], // quaternion
* viewport : [x, y, w, h], // array
* }
*
* </pre>
*
* @param {p5.RendererGL} renderer - p5 WEBGL renderer
* @param {Object} args - {distance, center, rotation, viewport}
*
*/
export class EasyCam {
public INFO: {
LIBRARY: string;
VERSION: string;
AUTHOR: string;
SOURCE: string;
toString(): string;
};
cam: this;
LOOK: Vec3;
UP: Vec3;
AXIS: { YAW: number; PITCH: number; ALL: any; ROLL: number };
SHIFT_CONSTRAINT: number;
FIXED_CONSTRAINT: number;
DRAG_CONSTRAINT: number;
scale_rotation: number;
scale_pan: number;
scale_zoom: number;
scale_zoomwheel: number;
distance_min_limit: number;
distance_min: number;
distance_max: number;
state: { distance: number; center: Vec3; rotation: Vec4; copy: () => any };
state_reset: any;
state_pushed: any;
viewport: Vec4;
offset: [number, number];
mouse: any;
auto_update: boolean;
dampedPanX: DampedAction;
dampedZoom: DampedAction;
dampedPanY: DampedAction;
pushed_uMVMatrix: any;
dampedRotX: DampedAction;
dampedRotY: DampedAction;
timedRot: Interpolation;
timedPan: Interpolation;
timedzoom: Interpolation;
renderer: any;
graphics: { _pInst: any } | undefined;
P5: {
pixelDensity: () => any;
mouseX: number;
mouseY: number;
registerMethod: (arg0: string, arg1: () => void) => void;
};
camEYE: Vec3;
camLAT: Vec3;
camRUP: Vec3;
dampedRotZ: any;
pushed_uPMatrix: any;
pushed_rendererState: any;
/**
* @constructor
*/
constructor(
renderer: { elt: { getBoundingClientRect: () => any }; width: number; height: number },
args?: {
distance: number;
center: Vec3;
rotation: Vec4;
viewport: Vec4;
offset: [number, number];
},
) {
// WEBGL renderer required
//@ts-ignore
if (!(renderer instanceof p5.RendererGL)) {
console.log("renderer needs to be an instance of p5.RendererGL");
return;
}
let bounds = renderer.elt.getBoundingClientRect();
// define default args
args = {
viewport: [0, 0, renderer.width, renderer.height],
offset: [bounds.x + window.scrollX, bounds.y + window.scrollY],
distance: 500,
center: [0, 0, 0],
rotation: Rotation.identity(),
...args,
};
// library info
this.INFO = INFO;
// set renderer, graphics, p5
// this.renderer;
// this.graphics;
// this.P5
this.setCanvas(renderer);
// self reference
let cam = this;
this.cam = cam;
// some constants
this.LOOK = [0, 0, 1];
this.UP = [0, 1, 0];
// principal axes flags
this.AXIS = new (function () {
this.YAW = 0x01;
this.PITCH = 0x02;
this.ROLL = 0x04;
this.ALL = this.YAW | this.PITCH | this.ROLL;
})();
// mouse action constraints
this.SHIFT_CONSTRAINT = 0; // applied when pressing the shift key
this.FIXED_CONSTRAINT = 0; // applied, when set by user and SHIFT_CONSTRAINT is 0
this.DRAG_CONSTRAINT = 0; // depending on SHIFT_CONSTRAINT and FIXED_CONSTRAINT, default is ALL
// mouse action speed
this.scale_rotation = 0.001;
this.scale_pan = 0.0002;
this.scale_zoom = 0.001;
this.scale_zoomwheel = 20.0;
// zoom limits
this.distance_min_limit = 0.01;
this.distance_min = 1.0;
this.distance_max = Number.MAX_VALUE;
// main state
this.state = {
distance: args.distance, // scalar
center: args.center.slice() as Vec3, // vec3
rotation: args.rotation.slice() as Vec4, // quaternion
copy: function (dst?: { distance: number; center: Vec3; rotation: Vec4 }) {
return {
distance: this.distance,
center: this.center.slice(),
rotation: this.rotation.slice(),
...dst,
};
},
};
// backup-state at start
this.state_reset = this.state.copy();
// backup-state, probably not required
this.state_pushed = this.state.copy();
// viewport for the mouse-pointer [x,y,w,h]
this.viewport = args.viewport.slice() as Vec4;
// offset of the canvas in the container
this.offset = args.offset.slice() as [number, number];
// add a handler for window resizing
window.addEventListener("resize", function (e) {
let p = renderer.elt.getBoundingClientRect();
cam.offset = [p.x + window.scrollX, p.y + window.scrollY];
});
// mouse/touch/key action handler
this.mouse = {
cam,
curr: [0, 0, 0],
prev: [0, 0, 0],
dist: [0, 0, 0],
mwheel: 0,
isPressed: false, // true if (istouchdown || ismousedown)
istouchdown: false, // true, if input came from a touch
ismousedown: false, // true, if input came from a mouse
BUTTON: { LMB: 0x01, MMB: 0x02, RMB: 0x04 },
button: 0,
mouseDragLeft: cam.mouseDragRotate.bind(cam),
mouseDragCenter: cam.mouseDragPan.bind(cam),
mouseDragRight: cam.mouseDragZoom.bind(cam),
mouseWheelAction: cam.mouseWheelZoom.bind(cam),
touchmoveSingle: cam.mouseDragRotate.bind(cam),
touchmoveMulti() {
cam.mouseDragPan();
cam.mouseDragZoom();
},
insideViewport(x: number, y: number) {
let x0 = cam.viewport[0],
x1 = x0 + cam.viewport[2];
let y0 = cam.viewport[1],
y1 = y0 + cam.viewport[3];
return x > x0 && x < x1 && y > y0 && y < y1;
},
solveConstraint() {
let dx = this.dist[0];
let dy = this.dist[1];
// YAW, PITCH
if (this.shiftKey && !cam.SHIFT_CONSTRAINT && Math.abs(dx - dy) > 1) {
cam.SHIFT_CONSTRAINT = Math.abs(dx) > Math.abs(dy) ? cam.AXIS.YAW : cam.AXIS.PITCH;
}
// define constraint by increasing priority
cam.DRAG_CONSTRAINT = cam.AXIS.ALL;
if (cam.FIXED_CONSTRAINT) cam.DRAG_CONSTRAINT = cam.FIXED_CONSTRAINT;
if (cam.SHIFT_CONSTRAINT) cam.DRAG_CONSTRAINT = cam.SHIFT_CONSTRAINT;
},
updateInput(x: number, y: number, z: number) {
let mouse = cam.mouse;
let pd = cam.P5.pixelDensity();
mouse.prev[0] = mouse.curr[0];
mouse.prev[1] = mouse.curr[1];
mouse.prev[2] = mouse.curr[2];
mouse.curr[0] = x;
mouse.curr[1] = y;
mouse.curr[2] = z;
mouse.dist[0] = -(mouse.curr[0] - mouse.prev[0]) / pd;
mouse.dist[1] = -(mouse.curr[1] - mouse.prev[1]) / pd;
mouse.dist[2] = -(mouse.curr[2] - mouse.prev[2]) / pd;
},
//////////////////////////////////////////////////////////////////////////
// mouseinput
//////////////////////////////////////////////////////////////////////////
mousedown(event: MouseEvent) {
let mouse = cam.mouse;
// Account for canvas shift:
let offX = cam.offset[0] - window.scrollX;
let offY = cam.offset[1] - window.scrollY;
if (event.button === 0) mouse.button |= mouse.BUTTON.LMB;
if (event.button === 1) mouse.button |= mouse.BUTTON.MMB;
if (event.button === 2) mouse.button |= mouse.BUTTON.RMB;
if (mouse.insideViewport(event.x - offX, event.y - offY)) {
mouse.updateInput(event.x - offX, event.y - offY, event.y - offY);
mouse.ismousedown = mouse.button > 0;
mouse.isPressed = mouse.ismousedown;
cam.SHIFT_CONSTRAINT = 0;
}
},
mousedrag() {
let pd = cam.P5.pixelDensity();
let mouse = cam.mouse;
if (mouse.ismousedown) {
let x = cam.P5.mouseX;
let y = cam.P5.mouseY;
let z = y;
mouse.updateInput(x, y, z);
mouse.solveConstraint();
let LMB = mouse.button & mouse.BUTTON.LMB;
let MMB = mouse.button & mouse.BUTTON.MMB;
let RMB = mouse.button & mouse.BUTTON.RMB;
if (LMB && mouse.mouseDragLeft) mouse.mouseDragLeft();
if (MMB && mouse.mouseDragCenter) mouse.mouseDragCenter();
if (RMB && mouse.mouseDragRight) mouse.mouseDragRight();
}
},
mouseup(event: MouseEvent) {
let mouse = cam.mouse;
if (event.button === 0) mouse.button &= ~mouse.BUTTON.LMB;
if (event.button === 1) mouse.button &= ~mouse.BUTTON.MMB;
if (event.button === 2) mouse.button &= ~mouse.BUTTON.RMB;
mouse.ismousedown = mouse.button > 0;
mouse.isPressed = mouse.istouchdown || mouse.ismousedown;
cam.SHIFT_CONSTRAINT = 0;
},
dblclick(event: MouseEvent) {
// Account for canvas shift:
let offX = cam.offset[0] - window.scrollX,
offY = cam.offset[1] - window.scrollY;
if (cam.mouse.insideViewport(event.x - offX, event.y - offY)) {
cam.reset();
}
},
wheel(event: WheelEvent) {
let x = event.x;
let y = event.y;
let mouse = cam.mouse;
if (mouse.insideViewport(x, y)) {
mouse.mwheel = event.deltaY * 0.01;
if (mouse.mouseWheelAction) mouse.mouseWheelAction();
}
},
//////////////////////////////////////////////////////////////////////////
// touchinput
//////////////////////////////////////////////////////////////////////////
evaluateTouches(event: TouchEvent) {
let touches = event.touches;
let avg_x = 0.0;
let avg_y = 0.0;
let avg_d = 0.0;
let i: number,
dx: number,
dy: number,
count = touches.length;
// Account for canvas shift:
let offX = cam.offset[0] - window.scrollX,
offY = cam.offset[1] - window.scrollY;
// center, averaged touch position
for (i = 0; i < count; i++) {
avg_x += touches[i].clientX - offX;
avg_y += touches[i].clientY - offY;
}
avg_x /= count;
avg_y /= count;
// offset, mean distance to center
for (i = 0; i < count; i++) {
dx = avg_x - (touches[i].clientX - offX);
dy = avg_y - (touches[i].clientY - offY);
avg_d += Math.sqrt(dx * dx + dy * dy);
}
avg_d /= count;
cam.mouse.updateInput(avg_x, avg_y, -avg_d);
},
touchstart(event: TouchEvent) {
event.preventDefault();
event.stopPropagation();
let mouse = cam.mouse;
mouse.evaluateTouches(event);
mouse.istouchdown = mouse.insideViewport(mouse.curr[0], mouse.curr[1]);
mouse.isPressed = cam.mouse.istouchdown || cam.mouse.ismousedown;
mouse.dbltap(event);
},
touchmove(event: TouchEvent) {
event.preventDefault();
event.stopPropagation();
let mouse = cam.mouse;
if (mouse.istouchdown) {
mouse.evaluateTouches(event);
mouse.solveConstraint();
if (event.touches.length === 1) {
mouse.touchmoveSingle();
} else {
mouse.touchmoveMulti();
mouse.tapcount = 0;
}
}
},
touchend(event: TouchEvent) {
event.preventDefault();
event.stopPropagation();
let mouse = cam.mouse;
(mouse.istouchdown = false), (mouse.isPressed = mouse.istouchdown || mouse.ismousedown);
cam.SHIFT_CONSTRAINT = 0;
if (mouse.tapcount >= 2) {
if (mouse.insideViewport(mouse.curr[0], mouse.curr[1])) {
cam.reset();
}
mouse.tapcount = 0;
}
},
tapcount: 0,
dbltap(event: TouchEvent) {
if (cam.mouse.tapcount++ === 0) {
setTimeout(function () {
cam.mouse.tapcount = 0;
}, 350);
}
},
//////////////////////////////////////////////////////////////////////////
// keyingput
//////////////////////////////////////////////////////////////////////////
// key-event for shift constraints
shiftKey: false,
keydown(event: KeyboardEvent) {
let mouse = cam.mouse;
if (!mouse.shiftKey) {
mouse.shiftKey = event.keyCode === 16;
}
},
keyup(event: KeyboardEvent) {
let mouse = cam.mouse;
if (mouse.shiftKey) {
mouse.shiftKey = event.keyCode !== 16;
if (!mouse.shiftKey) {
cam.SHIFT_CONSTRAINT = 0;
}
}
},
};
// camera mouse listeners
this.attachMouseListeners();
// P5 registered callbacks, TODO unregister on dispose
this.auto_update = true;
this.P5.registerMethod("pre", function () {
if (cam.auto_update) {
cam.update();
}
});
// damped camera transition
this.dampedZoom = new DampedAction(function (d: number) {
cam.zoom(d * cam.getZoomMult());
});
this.dampedPanX = new DampedAction(function (d: number) {
cam.panX(d * cam.getPanMult());
});
this.dampedPanY = new DampedAction(function (d: number) {
cam.panY(d * cam.getPanMult());
});
this.dampedRotX = new DampedAction(function (d: number) {
cam.rotateX(d * cam.getRotationMult());
});
this.dampedRotY = new DampedAction(function (d: number) {
cam.rotateY(d * cam.getRotationMult());
});
this.dampedRotY = new DampedAction(function (d: number) {
cam.rotateZ(d * cam.getRotationMult());
});
// interpolated camera transition
this.timedRot = new Interpolation(cam.setInterpolatedRotation.bind(cam));
this.timedPan = new Interpolation(cam.setInterpolatedCenter.bind(cam));
this.timedzoom = new Interpolation(cam.setInterpolatedDistance.bind(cam));
}
/**
* sets the WEBGL renderer the camera is working on
*
* @param {p5.RendererGL} renderer ... p5 WEBGL renderer
*/
//@ts-ignore
setCanvas(renderer: p5.RendererGL) {
//@ts-ignore
if (renderer instanceof p5.RendererGL) {
// p5js seems to be not very clear about this
// ... a bit confusing, so i guess this could change in future releases
this.renderer = renderer;
//@ts-ignore
if (renderer._pInst instanceof p5) {
this.graphics = renderer;
} else {
this.graphics = renderer._pInst;
}
this.P5 = this.graphics?._pInst;
} else {
this.graphics = undefined;
this.renderer = undefined;
}
}
/** @return {p5.RendererGL} the currently used renderer */
//@ts-ignore
getCanvas(): p5.RendererGL {
return this.renderer;
}
attachListener(
el: any,
ev: any,
fx: { el: { addEventListener: (arg0: any, arg1: any, arg2: any) => void }; ev: any; op: any },
op: any,
) {
if (!el || el === fx.el) {
return;
}
//@ts-ignore
this.detachListener(fx);
fx.el = el;
fx.ev = ev;
fx.op = op;
fx.el.addEventListener(fx.ev, fx, fx.op);
}
detachListener(fx: {
el: { removeEventListener: (arg0: any, arg1: any, arg2: any) => void } | undefined;
ev: any;
op: any;
}) {
if (fx.el) {
fx.el.removeEventListener(fx.ev, fx, fx.op);
fx.el = undefined;
}
}
/** attaches input-listeners (mouse, touch, key) to the used renderer */
attachMouseListeners(renderer?: { elt: any }) {
let cam = this.cam;
let mouse = cam.mouse;
renderer = renderer ?? cam.renderer;
if (renderer) {
let op = { passive: false };
let el = renderer.elt;
cam.attachListener(el, "mousedown", mouse.mousedown, op);
cam.attachListener(el, "mouseup", mouse.mouseup, op);
cam.attachListener(el, "dblclick", mouse.dblclick, op);
cam.attachListener(el, "wheel", mouse.wheel, op);
cam.attachListener(el, "touchstart", mouse.touchstart, op);
cam.attachListener(el, "touchend", mouse.touchend, op);
cam.attachListener(el, "touchmove", mouse.touchmove, op);
cam.attachListener(window, "keydown", mouse.keydown, op);
cam.attachListener(window, "keyup", mouse.keyup, op);
}
}
/** detaches all attached input-listeners */
removeMouseListeners() {
let cam = this.cam;
let mouse = cam.mouse;
cam.detachListener(mouse.mousedown);
cam.detachListener(mouse.mouseup);
cam.detachListener(mouse.dblclick);
cam.detachListener(mouse.wheel);
cam.detachListener(mouse.keydown);
cam.detachListener(mouse.keyup);
cam.detachListener(mouse.touchstart);
cam.detachListener(mouse.touchend);
cam.detachListener(mouse.touchmove);
}
/** Disposes/releases the camera. */
dispose() {
// TODO: p5 unregister 'pre', ... not available in 0.5.16
this.removeMouseListeners(); // Don't know, but type tells me do this.
}
/** @return {boolean} the current autoUpdate state */
getAutoUpdate(): boolean {
return this.auto_update;
}
/**
* If true, the EasyCam will update automatically in a pre-draw step.
* This updates the camera state and updates the renderers
* modelview/camera matrix.
*
* If false, the update() needs to be called manually. */
setAutoUpdate(status: boolean) {
this.auto_update = status;
}
/**
* Updates the camera state (interpolated / damped animations) and updates
* the renderers' modelview/camera matrix.
*
* if "auto_update" is true, this is called automatically in a pre-draw call.
*/
update() {
let cam = this.cam;
let mouse = cam.mouse;
mouse.mousedrag();
let b_update = false;
b_update ||= cam.dampedZoom.update();
b_update ||= cam.dampedPanX.update();
b_update ||= cam.dampedPanY.update();
b_update ||= cam.dampedRotX.update();
b_update ||= cam.dampedRotY.update();
b_update ||= cam.dampedRotZ.update();
// interpolated actions have lower priority then damped actions
if (b_update) {
cam.timedRot.stop();
cam.timedPan.stop();
cam.timedzoom.stop();
} else {
cam.timedRot.update();
cam.timedPan.update();
cam.timedzoom.update();
}
cam.apply();
}
/**
* Applies the current camera state to the renderers' modelview/camera matrix.
* If no argument is given, then the cameras currently set renderer is used.
*/
apply(renderer?: {
_curCamera: {
camera: (
arg0: any,
arg1: any,
arg2: any,
arg3: any,
arg4: any,
arg5: any,
arg6: any,
arg7: any,
arg8: any,
) => void;
};
camera: (
arg0: any,
arg1: any,
arg2: any,
arg3: any,
arg4: any,
arg5: any,
arg6: any,
arg7: any,
arg8: any,
) => void;
}) {
let cam = this.cam;
renderer = renderer || cam.renderer;
if (renderer) {
this.camEYE = this.getPosition(this.camEYE);
this.camLAT = this.getCenter(this.camLAT);
this.camRUP = this.getUpVector(this.camRUP);
if (undefined === renderer._curCamera)
renderer.camera(
this.camEYE[0],
this.camEYE[1],
this.camEYE[2],
this.camLAT[0],
this.camLAT[1],
this.camLAT[2],
this.camRUP[0],
this.camRUP[1],
this.camRUP[2],
);
else
renderer._curCamera.camera(
this.camEYE[0],
this.camEYE[1],
this.camEYE[2],
this.camLAT[0],
this.camLAT[1],
this.camLAT[2],
this.camRUP[0],
this.camRUP[1],
this.camRUP[2],
);
}
}
/** */
setViewport(viewport: Vec4) {
this.viewport = viewport.slice() as Vec4;
}
/** @returns {[number, number, number,number]} the current viewport-def, as [x,y,w,h] */
getViewport(): Vec4 {
return this.viewport;
}
//
// mouse state changes
//
/** implemented zoom-cb for mouswheel handler.*/
mouseWheelZoom() {
let cam = this;
let mouse = cam.mouse;
cam.dampedZoom.addForce(mouse.mwheel * cam.scale_zoomwheel);
}
/** implemented zoom-cb for mousedrag/touch handler.*/
mouseDragZoom() {
let cam = this;
let mouse = cam.mouse;
cam.dampedZoom.addForce(-mouse.dist[2]);
}
/** implemented pan-cb for mousedrag/touch handler.*/
mouseDragPan() {
let cam = this;
let mouse = cam.mouse;
cam.dampedPanX.addForce(cam.DRAG_CONSTRAINT & cam.AXIS.YAW ? mouse.dist[0] : 0);
cam.dampedPanY.addForce(cam.DRAG_CONSTRAINT & cam.AXIS.PITCH ? mouse.dist[1] : 0);
}
/** implemented rotate-cb for mousedrag/touch handler.*/
mouseDragRotate() {
let cam = this;
let mouse = cam.mouse;
let mx = mouse.curr[0],
my = mouse.curr[1];
let dx = mouse.dist[0],
dy = mouse.dist[1];
// mouse [-1, +1]
let mxNdc = Math.min(Math.max((mx - cam.viewport[0]) / cam.viewport[2], 0), 1) * 2 - 1;
let myNdc = Math.min(Math.max((my - cam.viewport[1]) / cam.viewport[3], 0), 1) * 2 - 1;
if (cam.DRAG_CONSTRAINT & cam.AXIS.YAW) {
cam.dampedRotY.addForce(+dx * (1.0 - myNdc * myNdc));
}
if (cam.DRAG_CONSTRAINT & cam.AXIS.PITCH) {
cam.dampedRotX.addForce(-dy * (1.0 - mxNdc * mxNdc));
}
if (cam.DRAG_CONSTRAINT & cam.AXIS.ROLL) {
cam.dampedRotZ.addForce(-dx * myNdc);
cam.dampedRotZ.addForce(+dy * mxNdc);
}
}
//
// damped multipliers
//
/** (private) returns the used zoom -multiplier for damped actions. */
getZoomMult() {
return this.state.distance * this.scale_zoom;
}
/** (private) returns the used pan-multiplier for damped actions. */
getPanMult() {
return this.state.distance * this.scale_pan;
}
/** (private) returns the used rotate-multiplier for damped actions. */
getRotationMult() {
return Math.pow(Math.log10(1 + this.state.distance), 0.5) * this.scale_rotation;
}
//
// damped state changes
//
/** Applies a change to the current zoom. */
zoom(dz: number) {
let cam = this.cam;
let distance_tmp = cam.state.distance + dz;
// check lower bound
if (distance_tmp < cam.distance_min) {
distance_tmp = cam.distance_min;
cam.dampedZoom.stop();
}
// check upper bound
if (distance_tmp > cam.distance_max) {
distance_tmp = cam.distance_max;
cam.dampedZoom.stop();
}
cam.state.distance = distance_tmp;
}
/** Applies a change to the current pan-xValue. */
panX(dx: number) {
let state = this.cam.state;
if (dx) {
let val = Rotation.applyToVec3(state.rotation, [dx, 0, 0]);
Vec3.add(state.center, val, state.center);
}
}
/** Applies a change to the current pan-yValue. */
panY(dy: number) {
let state = this.cam.state;
if (dy) {
let val = Rotation.applyToVec3(state.rotation, [0, dy, 0]);
Vec3.add(state.center, val, state.center);
}
}
/** Applies a change to the current pan-value. */
pan(dx: number, dy: number) {
this.cam.panX(dx);
this.cam.panY(dx);
}
/** Applies a change to the current xRotation. */
rotateX(rx: number) {
this.cam.rotate([1, 0, 0], rx);
}
/** Applies a change to the current yRotation. */
rotateY(ry: number) {
this.cam.rotate([0, 1, 0], ry);
}
/** Applies a change to the current zRotation. */
rotateZ(rz: number) {
this.cam.rotate([0, 0, 1], rz);
}
/** Applies a change to the current rotation, using the given axis/angle. */
rotate(axis: Vec3, angle?: number) {
let state = this.cam.state;
if (angle) {
let new_rotation = Rotation.create({ axis, angle }) as Vec4;
Rotation.applyToRotation(state.rotation, new_rotation, state.rotation);
}
}
//
// interpolated states
//
/** Sets the new camera-distance, interpolated (t) between given A and B. */
setInterpolatedDistance(valA: number, valB: number, t: number) {
this.cam.state.distance = Scalar.mix(valA, valB, Scalar.smoothstep(t));
}
/** Sets the new camera-center, interpolated (t) between given A and B. */
setInterpolatedCenter(valA: Vec3, valB: Vec3, t: number) {
//@ts-ignore
this.cam.state.center = Vec3.mix(valA, valB, Scalar.smoothstep(t));
}
/** Sets the new camera-rotation, interpolated (t) between given A and B. */
setInterpolatedRotation(valA: Vec4, valB: Vec4, t: number) {
//@ts-ignore
this.cam.state.rotation = Rotation.slerp(valA, valB, t);
}
//
// DISTANCE
//
/** Sets the minimum camera distance. */
setDistanceMin(distance_min: number) {
this.distance_min = Math.max(distance_min, this.distance_min_limit);
this.zoom(0); // update, to ensure new minimum
}
/** Sets the maximum camera distance. */
setDistanceMax(distance_max: number) {
this.distance_max = distance_max;
this.zoom(0); // update, to ensure new maximum
}
/**
* Sets the new camera distance.
*
* @param {double} distance new distance.
* @param {long} duration animation time in millis.
*/
setDistance(distance: number, duration: number) {
this.timedzoom.start(this.state.distance, distance, duration, [this.dampedZoom]);
}
/** @returns {double} the current camera distance. */
getDistance(): number {
return this.state.distance;
}
//
// CENTER / LOOK AT
//
/**
* Sets the new camera center.
*
*/
setCenter(center: Vec3, duration: number) {
this.timedPan.start(this.state.center, center, duration, [this.dampedPanX, this.dampedPanY]);
}
/** @returns {double[]} the current camera center. */
getCenter(...args: any[][]): Vec3 {
return this.state.center;
}
//
// ROTATION
//
/**
* Sets the new camera rotation (quaternion).
*
*/
setRotation(rotation: Vec4, duration: number) {
this.timedRot.start(this.state.rotation, rotation, duration, [this.dampedRotX, this.dampedRotY, this.dampedRotZ]);
}
/** @returns {double[]} the current camera rotation as quat[q0,q1,q2,q3]. */
getRotation(): Vec4 {
return this.state.rotation;
}
//
// CAMERA POSITION/EYE
//
/** @returns {double[]} the current camera position, aka. the eye position. */
getPosition(dst: Vec3): Vec3 {
let cam = this.cam;
let state = cam.state;
dst = Vec3.assert(dst);
Rotation.applyToVec3(state.rotation, cam.LOOK, dst);
Vec3.mult(dst, state.distance, dst);
Vec3.add(dst, state.center, dst);
return dst;
}
//
// CAMERA UP
//
/** @returns {double[]} the current camera up vector. */
getUpVector(dst: Vec3): Vec3 {
let cam = this.cam;
let state = cam.state;
dst = Vec3.assert(dst);
Rotation.applyToVec3(state.rotation, cam.UP, dst);
return dst;
}
//
// STATE (rotation, center, distance)
//
/** @returns {Object} a copy of the camera state {distance,center,rotation} */
getState(): {
distance: number;
center: Vec3;
rotation: Vec4;
copy: () => any;