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aframe-particle-system-component.js
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/******/ (function(modules) { // webpackBootstrap
/******/ // The module cache
/******/ var installedModules = {};
/******/
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/
/******/ // Check if module is in cache
/******/ if(installedModules[moduleId]) {
/******/ return installedModules[moduleId].exports;
/******/ }
/******/ // Create a new module (and put it into the cache)
/******/ var module = installedModules[moduleId] = {
/******/ i: moduleId,
/******/ l: false,
/******/ exports: {}
/******/ };
/******/
/******/ // Execute the module function
/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
/******/ // Flag the module as loaded
/******/ module.l = true;
/******/
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/
/******/
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = modules;
/******/
/******/ // expose the module cache
/******/ __webpack_require__.c = installedModules;
/******/
/******/ // define getter function for harmony exports
/******/ __webpack_require__.d = function(exports, name, getter) {
/******/ if(!__webpack_require__.o(exports, name)) {
/******/ Object.defineProperty(exports, name, {
/******/ configurable: false,
/******/ enumerable: true,
/******/ get: getter
/******/ });
/******/ }
/******/ };
/******/
/******/ // getDefaultExport function for compatibility with non-harmony modules
/******/ __webpack_require__.n = function(module) {
/******/ var getter = module && module.__esModule ?
/******/ function getDefault() { return module['default']; } :
/******/ function getModuleExports() { return module; };
/******/ __webpack_require__.d(getter, 'a', getter);
/******/ return getter;
/******/ };
/******/
/******/ // Object.prototype.hasOwnProperty.call
/******/ __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
/******/
/******/ // __webpack_public_path__
/******/ __webpack_require__.p = "";
/******/
/******/ // Load entry module and return exports
/******/ return __webpack_require__(__webpack_require__.s = 0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports, __webpack_require__) {
/**
* Particles component for A-Frame.
*
* ShaderParticleEngine by Squarefeet (https://github.com/squarefeet).
*/
var SPE = __webpack_require__(1);
if (typeof AFRAME === 'undefined') {
throw new Error('Component attempted to register before AFRAME was available.');
}
AFRAME.registerComponent('particle-system', {
schema: {
preset: {
type: 'string',
default: '',
oneOf: ['default', 'dust', 'snow', 'rain']
},
maxAge: {
type: 'number',
default: 6
},
positionSpread: {
type: 'vec3',
default: { x: 0, y: 0, z: 0 }
},
type: {
type: 'number',
default: SPE.distributions.BOX
},
rotationAxis: {
type: 'string',
default: 'x'
},
rotationAngle: {
type: 'number',
default: 0
},
rotationAngleSpread: {
type: 'number',
default: 0
},
accelerationValue: {
type: 'vec3',
default: { x: 0, y: -10, z: 0 }
},
accelerationSpread: {
type: 'vec3',
default: { x: 10, y: 0, z: 10 }
},
velocityValue: {
type: 'vec3',
default: { x: 0, y: 25, z: 0 }
},
velocitySpread: {
type: 'vec3',
default: { x: 10, y: 7.5, z: 10 }
},
dragValue: {
type: 'number',
default: 0
},
dragSpread: {
type: 'number',
default: 0
},
dragRandomise: {
type: 'boolean',
default: false
},
color: {
type: 'array',
default: [ '#0000FF', '#FF0000' ]
},
size: {
type: 'number',
default: 1
},
direction: {
type: 'number',
default: 1
},
duration: {
type: 'number',
default: null
},
particleCount: {
type: 'number',
default: 1000
},
texture: {
type: 'asset',
default: 'https://cdn.rawgit.com/IdeaSpaceVR/aframe-particle-system-component/master/dist/images/star2.png'
},
randomise: {
type: 'boolean',
default: false
},
opacity: {
type: 'array',
default: [ '1' ]
},
maxParticleCount: {
type: 'number',
default: 250000
},
blending: {
type: 'number',
default: THREE.AdditiveBlending,
oneOf: [THREE.NoBlending,THREE.NormalBlending,THREE.AdditiveBlending,THREE.SubtractiveBlending,THREE.MultiplyBlending]
},
enabled: {
type:'boolean',
default:true
}
},
init: function() {
this.presets = {};
/* preset settings can be overwritten */
this.presets['dust'] = {
maxAge: 20,
positionSpread: {x:100,y:100,z:100},
rotationAngle: 3.14,
accelerationValue: {x: 0, y: 0, z: 0},
accelerationSpread: {x: 0, y: 0, z: 0},
velocityValue: {x: 1, y: 0.3, z: 1},
velocitySpread: {x: 0.5, y: 1, z: 0.5},
color: ['#FFFFFF'],
particleCount: 100,
texture: 'https://cdn.rawgit.com/IdeaSpaceVR/aframe-particle-system-component/master/dist/images/smokeparticle.png'
};
this.presets['snow'] = {
maxAge: 20,
positionSpread: {x:100,y:100,z:100},
rotationAngle: 3.14,
accelerationValue: {x: 0, y: 0, z: 0},
accelerationSpread: {x: 0.2, y: 0, z: 0.2},
velocityValue: {x: 0, y: 8, z: 0},
velocitySpread: {x: 2, y: 0, z: 2},
color: ['#FFFFFF'],
particleCount: 200,
texture: 'https://cdn.rawgit.com/IdeaSpaceVR/aframe-particle-system-component/master/dist/images/smokeparticle.png'
};
this.presets['rain'] = {
maxAge: 1,
positionSpread: {x:100,y:100,z:100},
rotationAngle: 3.14,
accelerationValue: {x: 0, y: 3, z: 0},
accelerationSpread: {x: 2, y: 1, z: 2},
velocityValue: {x: 0, y: 75, z: 0},
velocitySpread: {x: 10, y: 50, z: 10},
color: ['#FFFFFF'],
size: 0.4,
texture: 'https://cdn.rawgit.com/IdeaSpaceVR/aframe-particle-system-component/master/dist/images/raindrop.png'
};
},
update: function (oldData) {
// Remove old particle group.
if (this.particleGroup) {
this.el.removeObject3D('particle-system');
}
// Set the selected preset, if any, or use an empty object to keep schema defaults
this.preset = this.presets[this.data.preset] || {};
// Get custom, preset, or default data for each property defined in the schema
for (var key in this.data) {
this.data[key] = this.applyPreset(key);
}
this.initParticleSystem(this.data);
if(this.data.enabled === true) {
this.startParticles()
} else {
this.stopParticles()
}
},
applyPreset: function (key) {
// !this.attrValue[key] = the user did not set a custom value
// this.preset[key] = there exists a value for this key in the selected preset
if (!this.attrValue[key] && this.preset[key]) {
return this.preset[key];
} else {
// Otherwise stick to the user or schema default value
return this.data[key];
}
},
tick: function(time, dt) {
this.particleGroup.tick(dt / 1000);
},
remove: function() {
// Remove particle system.
if (!this.particleGroup) { return; }
this.el.removeObject3D('particle-system');
},
startParticles: function() {
this.particleGroup.emitters.forEach(function(em) { em.enable() });
},
stopParticles: function() {
this.particleGroup.emitters.forEach(function(em) { em.disable() });
},
initParticleSystem: function(settings) {
var loader = new THREE.TextureLoader();
var particle_texture = loader.load(
settings.texture,
function (texture) {
return texture;
},
function (xhr) {
console.log((xhr.loaded / xhr.total * 100) + '% loaded');
},
function (xhr) {
console.log('An error occurred');
}
);
this.particleGroup = new SPE.Group({
texture: {
value: particle_texture
},
maxParticleCount: settings.maxParticleCount,
blending: settings.blending
});
var emitter = new SPE.Emitter({
maxAge: {
value: settings.maxAge
},
type: {
value: settings.type
},
position: {
spread: new THREE.Vector3(settings.positionSpread.x, settings.positionSpread.y, settings.positionSpread.z),
randomise: settings.randomise
//spreadClamp: new THREE.Vector3( 2, 2, 2 ),
//radius: 4
},
rotation: {
axis: (settings.rotationAxis=='x'?new THREE.Vector3(1, 0, 0):(settings.rotationAxis=='y'?new THREE.Vector3(0, 1, 0):(settings.rotationAxis=='z'?new THREE.Vector3(0, 0, 1):new THREE.Vector3(0, 1, 0)))),
angle: settings.rotationAngle,
angleSpread: settings.rotationAngleSpread,
static: true
},
acceleration: {
value: new THREE.Vector3(settings.accelerationValue.x, settings.accelerationValue.y, settings.accelerationValue.z),
spread: new THREE.Vector3(settings.accelerationSpread.x, settings.accelerationSpread.y, settings.accelerationSpread.z)
},
velocity: {
value: new THREE.Vector3(settings.velocityValue.x, settings.velocityValue.y, settings.velocityValue.z),
spread: new THREE.Vector3(settings.velocitySpread.x, settings.velocitySpread.y, settings.velocitySpread.z)
},
drag: {
value: new THREE.Vector3(settings.dragValue.x, settings.dragValue.y, settings.dragValue.z),
spread: new THREE.Vector3(settings.dragSpread.x, settings.dragSpread.y, settings.dragSpread.z),
randomise: settings.dragRandomise
},
color: {
value: settings.color.map(function(c) { return new THREE.Color(c); })
},
size: {
value: settings.size
},
/*wiggle: { value: 4, spread: 2 }, //settings.wiggle,*/
/*drag: {
value: settings.drag
},*/
direction: {
value: settings.direction
},
duration: settings.duration,
opacity: { value: settings.opacity.map(function (o) { return parseFloat(o); }) },
particleCount: settings.particleCount
});
this.particleGroup.addEmitter(emitter);
this.particleGroup.mesh.frustumCulled = false;
this.el.setObject3D('particle-system', this.particleGroup.mesh);
}
});
/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {
var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_RESULT__;/* shader-particle-engine 1.0.5
*
* (c) 2015 Luke Moody (http://www.github.com/squarefeet)
* Originally based on Lee Stemkoski's original work (https://github.com/stemkoski/stemkoski.github.com/blob/master/Three.js/js/ParticleEngine.js).
*
* shader-particle-engine may be freely distributed under the MIT license (See LICENSE at root of this repository.)
*/
/**
* @typedef {Number} distribution
* @property {Number} SPE.distributions.BOX Values will be distributed within a box.
* @property {Number} SPE.distributions.SPHERE Values will be distributed within a sphere.
* @property {Number} SPE.distributions.DISC Values will be distributed within a 2D disc.
*/
/**
* Namespace for Shader Particle Engine.
*
* All SPE-related code sits under this namespace.
*
* @type {Object}
* @namespace
*/
var SPE = {
/**
* A map of supported distribution types used
* by SPE.Emitter instances.
*
* These distribution types can be applied to
* an emitter globally, which will affect the
* `position`, `velocity`, and `acceleration`
* value calculations for an emitter, or they
* can be applied on a per-property basis.
*
* @enum {Number}
*/
distributions: {
/**
* Values will be distributed within a box.
* @type {Number}
*/
BOX: 1,
/**
* Values will be distributed on a sphere.
* @type {Number}
*/
SPHERE: 2,
/**
* Values will be distributed on a 2d-disc shape.
* @type {Number}
*/
DISC: 3,
},
/**
* Set this value to however many 'steps' you
* want value-over-lifetime properties to have.
*
* It's adjustable to fix an interpolation problem:
*
* Assuming you specify an opacity value as [0, 1, 0]
* and the `valueOverLifetimeLength` is 4, then the
* opacity value array will be reinterpolated to
* be [0, 0.66, 0.66, 0].
* This isn't ideal, as particles would never reach
* full opacity.
*
* NOTE:
* This property affects the length of ALL
* value-over-lifetime properties for ALL
* emitters and ALL groups.
*
* Only values >= 3 && <= 4 are allowed.
*
* @type {Number}
*/
valueOverLifetimeLength: 4
};
// Module loader support:
if ( true ) {
!(__WEBPACK_AMD_DEFINE_FACTORY__ = (SPE),
__WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?
(__WEBPACK_AMD_DEFINE_FACTORY__.call(exports, __webpack_require__, exports, module)) :
__WEBPACK_AMD_DEFINE_FACTORY__),
__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
}
else if ( typeof exports !== 'undefined' && typeof module !== 'undefined' ) {
module.exports = SPE;
}
/**
* A helper class for TypedArrays.
*
* Allows for easy resizing, assignment of various component-based
* types (Vector2s, Vector3s, Vector4s, Mat3s, Mat4s),
* as well as Colors (where components are `r`, `g`, `b`),
* Numbers, and setting from other TypedArrays.
*
* @author Luke Moody
* @constructor
* @param {Function} TypedArrayConstructor The constructor to use (Float32Array, Uint8Array, etc.)
* @param {Number} size The size of the array to create
* @param {Number} componentSize The number of components per-value (ie. 3 for a vec3, 9 for a Mat3, etc.)
* @param {Number} indexOffset The index in the array from which to start assigning values. Default `0` if none provided
*/
SPE.TypedArrayHelper = function( TypedArrayConstructor, size, componentSize, indexOffset ) {
'use strict';
this.componentSize = componentSize || 1;
this.size = ( size || 1 );
this.TypedArrayConstructor = TypedArrayConstructor || Float32Array;
this.array = new TypedArrayConstructor( size * this.componentSize );
this.indexOffset = indexOffset || 0;
};
SPE.TypedArrayHelper.constructor = SPE.TypedArrayHelper;
/**
* Sets the size of the internal array.
*
* Delegates to `this.shrink` or `this.grow` depending on size
* argument's relation to the current size of the internal array.
*
* Note that if the array is to be shrunk, data will be lost.
*
* @param {Number} size The new size of the array.
*/
SPE.TypedArrayHelper.prototype.setSize = function( size, noComponentMultiply ) {
'use strict';
var currentArraySize = this.array.length;
if ( !noComponentMultiply ) {
size = size * this.componentSize;
}
if ( size < currentArraySize ) {
return this.shrink( size );
}
else if ( size > currentArraySize ) {
return this.grow( size );
}
else {
console.info( 'TypedArray is already of size:', size + '.', 'Will not resize.' );
}
};
/**
* Shrinks the internal array.
*
* @param {Number} size The new size of the typed array. Must be smaller than `this.array.length`.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.shrink = function( size ) {
'use strict';
this.array = this.array.subarray( 0, size );
this.size = size;
return this;
};
/**
* Grows the internal array.
* @param {Number} size The new size of the typed array. Must be larger than `this.array.length`.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.grow = function( size ) {
'use strict';
var existingArray = this.array,
newArray = new this.TypedArrayConstructor( size );
newArray.set( existingArray );
this.array = newArray;
this.size = size;
return this;
};
/**
* Perform a splice operation on this array's buffer.
* @param {Number} start The start index of the splice. Will be multiplied by the number of components for this attribute.
* @param {Number} end The end index of the splice. Will be multiplied by the number of components for this attribute.
* @returns {Object} The SPE.TypedArrayHelper instance.
*/
SPE.TypedArrayHelper.prototype.splice = function( start, end ) {
'use strict';
start *= this.componentSize;
end *= this.componentSize;
var data = [],
array = this.array,
size = array.length;
for ( var i = 0; i < size; ++i ) {
if ( i < start || i >= end ) {
data.push( array[ i ] );
}
// array[ i ] = 0;
}
this.setFromArray( 0, data );
return this;
};
/**
* Copies from the given TypedArray into this one, using the index argument
* as the start position. Alias for `TypedArray.set`. Will automatically resize
* if the given source array is of a larger size than the internal array.
*
* @param {Number} index The start position from which to copy into this array.
* @param {TypedArray} array The array from which to copy; the source array.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setFromArray = function( index, array ) {
'use strict';
var sourceArraySize = array.length,
newSize = index + sourceArraySize;
if ( newSize > this.array.length ) {
this.grow( newSize );
}
else if ( newSize < this.array.length ) {
this.shrink( newSize );
}
this.array.set( array, this.indexOffset + index );
return this;
};
/**
* Set a Vector2 value at `index`.
*
* @param {Number} index The index at which to set the vec2 values from.
* @param {Vector2} vec2 Any object that has `x` and `y` properties.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setVec2 = function( index, vec2 ) {
'use strict';
return this.setVec2Components( index, vec2.x, vec2.y );
};
/**
* Set a Vector2 value using raw components.
*
* @param {Number} index The index at which to set the vec2 values from.
* @param {Number} x The Vec2's `x` component.
* @param {Number} y The Vec2's `y` component.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setVec2Components = function( index, x, y ) {
'use strict';
var array = this.array,
i = this.indexOffset + ( index * this.componentSize );
array[ i ] = x;
array[ i + 1 ] = y;
return this;
};
/**
* Set a Vector3 value at `index`.
*
* @param {Number} index The index at which to set the vec3 values from.
* @param {Vector3} vec2 Any object that has `x`, `y`, and `z` properties.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setVec3 = function( index, vec3 ) {
'use strict';
return this.setVec3Components( index, vec3.x, vec3.y, vec3.z );
};
/**
* Set a Vector3 value using raw components.
*
* @param {Number} index The index at which to set the vec3 values from.
* @param {Number} x The Vec3's `x` component.
* @param {Number} y The Vec3's `y` component.
* @param {Number} z The Vec3's `z` component.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setVec3Components = function( index, x, y, z ) {
'use strict';
var array = this.array,
i = this.indexOffset + ( index * this.componentSize );
array[ i ] = x;
array[ i + 1 ] = y;
array[ i + 2 ] = z;
return this;
};
/**
* Set a Vector4 value at `index`.
*
* @param {Number} index The index at which to set the vec4 values from.
* @param {Vector4} vec2 Any object that has `x`, `y`, `z`, and `w` properties.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setVec4 = function( index, vec4 ) {
'use strict';
return this.setVec4Components( index, vec4.x, vec4.y, vec4.z, vec4.w );
};
/**
* Set a Vector4 value using raw components.
*
* @param {Number} index The index at which to set the vec4 values from.
* @param {Number} x The Vec4's `x` component.
* @param {Number} y The Vec4's `y` component.
* @param {Number} z The Vec4's `z` component.
* @param {Number} w The Vec4's `w` component.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setVec4Components = function( index, x, y, z, w ) {
'use strict';
var array = this.array,
i = this.indexOffset + ( index * this.componentSize );
array[ i ] = x;
array[ i + 1 ] = y;
array[ i + 2 ] = z;
array[ i + 3 ] = w;
return this;
};
/**
* Set a Matrix3 value at `index`.
*
* @param {Number} index The index at which to set the matrix values from.
* @param {Matrix3} mat3 The 3x3 matrix to set from. Must have a TypedArray property named `elements` to copy from.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setMat3 = function( index, mat3 ) {
'use strict';
return this.setFromArray( this.indexOffset + ( index * this.componentSize ), mat3.elements );
};
/**
* Set a Matrix4 value at `index`.
*
* @param {Number} index The index at which to set the matrix values from.
* @param {Matrix4} mat3 The 4x4 matrix to set from. Must have a TypedArray property named `elements` to copy from.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setMat4 = function( index, mat4 ) {
'use strict';
return this.setFromArray( this.indexOffset + ( index * this.componentSize ), mat4.elements );
};
/**
* Set a Color value at `index`.
*
* @param {Number} index The index at which to set the vec3 values from.
* @param {Color} color Any object that has `r`, `g`, and `b` properties.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setColor = function( index, color ) {
'use strict';
return this.setVec3Components( index, color.r, color.g, color.b );
};
/**
* Set a Number value at `index`.
*
* @param {Number} index The index at which to set the vec3 values from.
* @param {Number} numericValue The number to assign to this index in the array.
* @return {SPE.TypedArrayHelper} Instance of this class.
*/
SPE.TypedArrayHelper.prototype.setNumber = function( index, numericValue ) {
'use strict';
this.array[ this.indexOffset + ( index * this.componentSize ) ] = numericValue;
return this;
};
/**
* Returns the value of the array at the given index, taking into account
* the `indexOffset` property of this class.
*
* Note that this function ignores the component size and will just return a
* single value.
*
* @param {Number} index The index in the array to fetch.
* @return {Number} The value at the given index.
*/
SPE.TypedArrayHelper.prototype.getValueAtIndex = function( index ) {
'use strict';
return this.array[ this.indexOffset + index ];
};
/**
* Returns the component value of the array at the given index, taking into account
* the `indexOffset` property of this class.
*
* If the componentSize is set to 3, then it will return a new TypedArray
* of length 3.
*
* @param {Number} index The index in the array to fetch.
* @return {TypedArray} The component value at the given index.
*/
SPE.TypedArrayHelper.prototype.getComponentValueAtIndex = function( index ) {
'use strict';
return this.array.subarray( this.indexOffset + ( index * this.componentSize ) );
};
/**
* A helper to handle creating and updating a THREE.BufferAttribute instance.
*
* @author Luke Moody
* @constructor
* @param {String} type The buffer attribute type. See SPE.ShaderAttribute.typeSizeMap for valid values.
* @param {Boolean=} dynamicBuffer Whether this buffer attribute should be marked as dynamic or not.
* @param {Function=} arrayType A reference to a TypedArray constructor. Defaults to Float32Array if none provided.
*/
SPE.ShaderAttribute = function( type, dynamicBuffer, arrayType ) {
'use strict';
var typeMap = SPE.ShaderAttribute.typeSizeMap;
this.type = typeof type === 'string' && typeMap.hasOwnProperty( type ) ? type : 'f';
this.componentSize = typeMap[ this.type ];
this.arrayType = arrayType || Float32Array;
this.typedArray = null;
this.bufferAttribute = null;
this.dynamicBuffer = !!dynamicBuffer;
this.updateMin = 0;
this.updateMax = 0;
};
SPE.ShaderAttribute.constructor = SPE.ShaderAttribute;
/**
* A map of uniform types to their component size.
* @enum {Number}
*/
SPE.ShaderAttribute.typeSizeMap = {
/**
* Float
* @type {Number}
*/
f: 1,
/**
* Vec2
* @type {Number}
*/
v2: 2,
/**
* Vec3
* @type {Number}
*/
v3: 3,
/**
* Vec4
* @type {Number}
*/
v4: 4,
/**
* Color
* @type {Number}
*/
c: 3,
/**
* Mat3
* @type {Number}
*/
m3: 9,
/**
* Mat4
* @type {Number}
*/
m4: 16
};
/**
* Calculate the minimum and maximum update range for this buffer attribute using
* component size independant min and max values.
*
* @param {Number} min The start of the range to mark as needing an update.
* @param {Number} max The end of the range to mark as needing an update.
*/
SPE.ShaderAttribute.prototype.setUpdateRange = function( min, max ) {
'use strict';
this.updateMin = Math.min( min * this.componentSize, this.updateMin * this.componentSize );
this.updateMax = Math.max( max * this.componentSize, this.updateMax * this.componentSize );
};
/**
* Calculate the number of indices that this attribute should mark as needing
* updating. Also marks the attribute as needing an update.
*/
SPE.ShaderAttribute.prototype.flagUpdate = function() {
'use strict';
var attr = this.bufferAttribute,
range = attr.updateRange;
range.offset = this.updateMin;
range.count = Math.min( ( this.updateMax - this.updateMin ) + this.componentSize, this.typedArray.array.length );
// console.log( range.offset, range.count, this.typedArray.array.length );
// console.log( 'flagUpdate:', range.offset, range.count );
attr.needsUpdate = true;
};
/**
* Reset the index update counts for this attribute
*/
SPE.ShaderAttribute.prototype.resetUpdateRange = function() {
'use strict';
this.updateMin = 0;
this.updateMax = 0;
};
SPE.ShaderAttribute.prototype.resetDynamic = function() {
'use strict';
this.bufferAttribute.dynamic = this.dynamicBuffer;
};
/**
* Perform a splice operation on this attribute's buffer.
* @param {Number} start The start index of the splice. Will be multiplied by the number of components for this attribute.
* @param {Number} end The end index of the splice. Will be multiplied by the number of components for this attribute.
*/
SPE.ShaderAttribute.prototype.splice = function( start, end ) {
'use strict';
this.typedArray.splice( start, end );
// Reset the reference to the attribute's typed array
// since it has probably changed.
this.forceUpdateAll();
};
SPE.ShaderAttribute.prototype.forceUpdateAll = function() {
'use strict';
this.bufferAttribute.array = this.typedArray.array;
this.bufferAttribute.updateRange.offset = 0;
this.bufferAttribute.updateRange.count = -1;
this.bufferAttribute.dynamic = false;
this.bufferAttribute.needsUpdate = true;
};
/**
* Make sure this attribute has a typed array associated with it.
*
* If it does, then it will ensure the typed array is of the correct size.
*
* If not, a new SPE.TypedArrayHelper instance will be created.
*
* @param {Number} size The size of the typed array to create or update to.
*/
SPE.ShaderAttribute.prototype._ensureTypedArray = function( size ) {
'use strict';
// Condition that's most likely to be true at the top: no change.
if ( this.typedArray !== null && this.typedArray.size === size * this.componentSize ) {
return;
}
// Resize the array if we need to, telling the TypedArrayHelper to
// ignore it's component size when evaluating size.
else if ( this.typedArray !== null && this.typedArray.size !== size ) {
this.typedArray.setSize( size );
}
// This condition should only occur once in an attribute's lifecycle.
else if ( this.typedArray === null ) {
this.typedArray = new SPE.TypedArrayHelper( this.arrayType, size, this.componentSize );
}
};
/**
* Creates a THREE.BufferAttribute instance if one doesn't exist already.
*
* Ensures a typed array is present by calling _ensureTypedArray() first.
*
* If a buffer attribute exists already, then it will be marked as needing an update.
*
* @param {Number} size The size of the typed array to create if one doesn't exist, or resize existing array to.
*/
SPE.ShaderAttribute.prototype._createBufferAttribute = function( size ) {
'use strict';