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| import Base from './core/Base';
import glenum from './core/glenum';
import Cache from './core/Cache';
import vendor from './core/vendor';
import glMatrix from './dep/glmatrix';
import BoundingBox from './math/BoundingBox';
var vec3 = glMatrix.vec3;
var mat4 = glMatrix.mat4;
var vec3Create = vec3.create;
var vec3Add = vec3.add;
var vec3Set = vec3.set;
function getArrayCtorByType (type) {
return ({
'byte': vendor.Int8Array,
'ubyte': vendor.Uint8Array,
'short': vendor.Int16Array,
'ushort': vendor.Uint16Array
})[type] || vendor.Float32Array;
}
function makeAttrKey(attrName) {
return 'attr_' + attrName;
}
/**
* Geometry attribute
* @alias clay.Geometry.Attribute
* @constructor
*/
function Attribute(name, type, size, semantic) {
/**
* Attribute name
* @type {string}
*/
this.name = name;
/**
* Attribute type
* Possible values:
* + `'byte'`
* + `'ubyte'`
* + `'short'`
* + `'ushort'`
* + `'float'` Most commonly used.
* @type {string}
*/
this.type = type;
/**
* Size of attribute component. 1 - 4.
* @type {number}
*/
this.size = size;
/**
* Semantic of this attribute.
* Possible values:
* + `'POSITION'`
* + `'NORMAL'`
* + `'BINORMAL'`
* + `'TANGENT'`
* + `'TEXCOORD'`
* + `'TEXCOORD_0'`
* + `'TEXCOORD_1'`
* + `'COLOR'`
* + `'JOINT'`
* + `'WEIGHT'`
*
* In shader, attribute with same semantic will be automatically mapped. For example:
* ```glsl
* attribute vec3 pos: POSITION
* ```
* will use the attribute value with semantic POSITION in geometry, no matter what name it used.
* @type {string}
*/
this.semantic = semantic || '';
/**
* Value of the attribute.
* @type {TypedArray}
*/
this.value = null;
// Init getter setter
switch (size) {
case 1:
this.get = function (idx) {
return this.value[idx];
};
this.set = function (idx, value) {
this.value[idx] = value;
};
// Copy from source to target
this.copy = function (target, source) {
this.value[target] = this.value[target];
};
break;
case 2:
this.get = function (idx, out) {
var arr = this.value;
out[0] = arr[idx * 2];
out[1] = arr[idx * 2 + 1];
return out;
};
this.set = function (idx, val) {
var arr = this.value;
arr[idx * 2] = val[0];
arr[idx * 2 + 1] = val[1];
};
this.copy = function (target, source) {
var arr = this.value;
source *= 2;
target *= 2;
arr[target] = arr[source];
arr[target + 1] = arr[source + 1];
};
break;
case 3:
this.get = function (idx, out) {
var idx3 = idx * 3;
var arr = this.value;
out[0] = arr[idx3];
out[1] = arr[idx3 + 1];
out[2] = arr[idx3 + 2];
return out;
};
this.set = function (idx, val) {
var idx3 = idx * 3;
var arr = this.value;
arr[idx3] = val[0];
arr[idx3 + 1] = val[1];
arr[idx3 + 2] = val[2];
};
this.copy = function (target, source) {
var arr = this.value;
source *= 3;
target *= 3;
arr[target] = arr[source];
arr[target + 1] = arr[source + 1];
arr[target + 2] = arr[source + 2];
};
break;
case 4:
this.get = function (idx, out) {
var arr = this.value;
var idx4 = idx * 4;
out[0] = arr[idx4];
out[1] = arr[idx4 + 1];
out[2] = arr[idx4 + 2];
out[3] = arr[idx4 + 3];
return out;
};
this.set = function (idx, val) {
var arr = this.value;
var idx4 = idx * 4;
arr[idx4] = val[0];
arr[idx4 + 1] = val[1];
arr[idx4 + 2] = val[2];
arr[idx4 + 3] = val[3];
};
this.copy = function (target, source) {
var arr = this.value;
source *= 4;
target *= 4;
// copyWithin is extremely slow
arr[target] = arr[source];
arr[target + 1] = arr[source + 1];
arr[target + 2] = arr[source + 2];
arr[target + 3] = arr[source + 3];
};
}
}
/**
* Set item value at give index. Second parameter val is number if size is 1
* @function
* @name clay.Geometry.Attribute#set
* @param {number} idx
* @param {number[]|number} val
* @example
* geometry.getAttribute('position').set(0, [1, 1, 1]);
*/
/**
* Get item value at give index. Second parameter out is no need if size is 1
* @function
* @name clay.Geometry.Attribute#set
* @param {number} idx
* @param {number[]} [out]
* @example
* geometry.getAttribute('position').get(0, out);
*/
/**
* Initialize attribute with given vertex count
* @param {number} nVertex
*/
Attribute.prototype.init = function (nVertex) {
Eif (!this.value || this.value.length != nVertex * this.size) {
var ArrayConstructor = getArrayCtorByType(this.type);
this.value = new ArrayConstructor(nVertex * this.size);
}
};
/**
* Initialize attribute with given array. Which can be 1 dimensional or 2 dimensional
* @param {Array} array
* @example
* geometry.getAttribute('position').fromArray(
* [-1, 0, 0, 1, 0, 0, 0, 1, 0]
* );
* geometry.getAttribute('position').fromArray(
* [ [-1, 0, 0], [1, 0, 0], [0, 1, 0] ]
* );
*/
Attribute.prototype.fromArray = function (array) {
var ArrayConstructor = getArrayCtorByType(this.type);
var value;
// Convert 2d array to flat
Eif (array[0] && (array[0].length)) {
var n = 0;
var size = this.size;
value = new ArrayConstructor(array.length * size);
for (var i = 0; i < array.length; i++) {
for (var j = 0; j < size; j++) {
value[n++] = array[i][j];
}
}
}
else {
value = new ArrayConstructor(array);
}
this.value = value;
};
Attribute.prototype.clone = function(copyValue) {
var ret = new Attribute(this.name, this.type, this.size, this.semantic);
// FIXME
if (copyValue) {
console.warn('todo');
}
return ret;
};
function AttributeBuffer(name, type, buffer, size, semantic) {
this.name = name;
this.type = type;
this.buffer = buffer;
this.size = size;
this.semantic = semantic;
// To be set in mesh
// symbol in the shader
this.symbol = '';
// Needs remove flag
this.needsRemove = false;
}
function IndicesBuffer(buffer) {
this.buffer = buffer;
this.count = 0;
}
/**
* Geometry in ClayGL contains vertex attributes of mesh. These vertex attributes will be finally provided to the {@link clay.Shader}.
* Different {@link clay.Shader} needs different attributes. Here is a list of attributes used in the builtin shaders.
*
* + position: `clay.basic`, `clay.lambert`, `clay.standard`
* + texcoord0: `clay.basic`, `clay.lambert`, `clay.standard`
* + color: `clay.basic`, `clay.lambert`, `clay.standard`
* + weight: `clay.basic`, `clay.lambert`, `clay.standard`
* + joint: `clay.basic`, `clay.lambert`, `clay.standard`
* + normal: `clay.lambert`, `clay.standard`
* + tangent: `clay.standard`
*
* #### Create a procedural geometry
*
* ClayGL provides a couple of builtin procedural geometries. Inlcuding:
*
* + {@link clay.geometry.Cube}
* + {@link clay.geometry.Sphere}
* + {@link clay.geometry.Plane}
* + {@link clay.geometry.Cylinder}
* + {@link clay.geometry.Cone}
* + {@link clay.geometry.ParametricSurface}
*
* It's simple to create a basic geometry with these classes.
*
```js
var sphere = new clay.geometry.Sphere({
radius: 2
});
```
*
* #### Create the geometry data by yourself
*
* Usually the vertex attributes data are created by the {@link clay.loader.GLTF} or procedural geometries like {@link clay.geometry.Sphere}.
* Besides these, you can create the data manually. Here is a simple example to create a triangle.
```js
var TRIANGLE_POSITIONS = [
[-0.5, -0.5, 0],
[0.5, -0.5, 0],
[0, 0.5, 0]
];
var geometry = new clay.StaticGeometry();
// Add triangle vertices to position attribute.
geometry.attributes.position.fromArray(TRIANGLE_POSITIONS);
```
* Then you can use the utility methods like `generateVertexNormals`, `generateTangents` to create the remaining necessary attributes.
*
*
* #### Use with custom shaders
*
* If you wan't to write custom shaders. Don't forget to add SEMANTICS to these attributes. For example
*
```glsl
uniform mat4 worldViewProjection : WORLDVIEWPROJECTION;
uniform mat4 worldInverseTranspose : WORLDINVERSETRANSPOSE;
uniform mat4 world : WORLD;
attribute vec3 position : POSITION;
attribute vec2 texcoord : TEXCOORD_0;
attribute vec3 normal : NORMAL;
```
* These `POSITION`, `TEXCOORD_0`, `NORMAL` are SEMANTICS which will map the attributes in shader to the attributes in the Geometry
*
* Available attributes SEMANTICS includes `POSITION`, `TEXCOORD_0`, `TEXCOORD_1` `NORMAL`, `TANGENT`, `COLOR`, `WEIGHT`, `JOINT`.
*
*
* @constructor clay.Geometry
* @extends clay.core.Base
*/
var Geometry = Base.extend(function () {
return /** @lends clay.Geometry# */ {
/**
* Attributes of geometry. Including:
* + `position`
* + `texcoord0`
* + `texcoord1`
* + `normal`
* + `tangent`
* + `color`
* + `weight`
* + `joint`
* + `barycentric`
*
* @type {Object.<string, clay.Geometry.Attribute>}
*/
attributes: {
position: new Attribute('position', 'float', 3, 'POSITION'),
texcoord0: new Attribute('texcoord0', 'float', 2, 'TEXCOORD_0'),
texcoord1: new Attribute('texcoord1', 'float', 2, 'TEXCOORD_1'),
normal: new Attribute('normal', 'float', 3, 'NORMAL'),
tangent: new Attribute('tangent', 'float', 4, 'TANGENT'),
color: new Attribute('color', 'float', 4, 'COLOR'),
// Skinning attributes
// Each vertex can be bind to 4 bones, because the
// sum of weights is 1, so the weights is stored in vec3 and the last
// can be calculated by 1-w.x-w.y-w.z
weight: new Attribute('weight', 'float', 3, 'WEIGHT'),
joint: new Attribute('joint', 'float', 4, 'JOINT'),
// For wireframe display
// http://codeflow.org/entries/2012/aug/02/easy-wireframe-display-with-barycentric-coordinates/
barycentric: new Attribute('barycentric', 'float', 3, null),
},
/**
* Calculated bounding box of geometry.
* @type {clay.BoundingBox}
*/
boundingBox: null,
/**
* Indices of geometry.
* @type {Uint16Array|Uint32Array}
*/
indices: null,
/**
* Is vertices data dynamically updated.
* Attributes value can't be changed after first render if dyanmic is false.
* @type {boolean}
*/
dynamic: true,
_enabledAttributes: null,
// PENDING
// Init it here to avoid deoptimization when it's assigned in application dynamically
__used: 0
};
}, function() {
// Use cache
this._cache = new Cache();
this._attributeList = Object.keys(this.attributes);
this.__vaoCache = {};
},
/** @lends clay.Geometry.prototype */
{
/**
* Main attribute will be used to count vertex number
* @type {string}
*/
mainAttribute: 'position',
/**
* User defined picking algorithm instead of default
* triangle ray intersection
* x, y are NDC.
* ```typescript
* (x, y, renderer, camera, renderable, out) => boolean
* ```
* @type {?Function}
*/
pick: null,
/**
* User defined ray picking algorithm instead of default
* triangle ray intersection
* ```typescript
* (ray: clay.Ray, renderable: clay.Renderable, out: Array) => boolean
* ```
* @type {?Function}
*/
pickByRay: null,
/**
* Update boundingBox of Geometry
*/
updateBoundingBox: function () {
var bbox = this.boundingBox;
Iif (!bbox) {
bbox = this.boundingBox = new BoundingBox();
}
var posArr = this.attributes.position.value;
Eif (posArr && posArr.length) {
var min = bbox.min;
var max = bbox.max;
var minArr = min.array;
var maxArr = max.array;
vec3.set(minArr, posArr[0], posArr[1], posArr[2]);
vec3.set(maxArr, posArr[0], posArr[1], posArr[2]);
for (var i = 3; i < posArr.length;) {
var x = posArr[i++];
var y = posArr[i++];
var z = posArr[i++];
if (x < minArr[0]) { minArr[0] = x; }
Iif (y < minArr[1]) { minArr[1] = y; }
if (z < minArr[2]) { minArr[2] = z; }
if (x > maxArr[0]) { maxArr[0] = x; }
if (y > maxArr[1]) { maxArr[1] = y; }
if (z > maxArr[2]) { maxArr[2] = z; }
}
min._dirty = true;
max._dirty = true;
}
},
/**
* Mark attributes and indices in geometry needs to update.
* Usually called after you change the data in attributes.
*/
dirty: function () {
var enabledAttributes = this.getEnabledAttributes();
for (var i = 0; i < enabledAttributes.length; i++) {
this.dirtyAttribute(enabledAttributes[i]);
}
this.dirtyIndices();
this._enabledAttributes = null;
this._cache.dirty('any');
},
/**
* Mark the indices needs to update.
*/
dirtyIndices: function () {
this._cache.dirtyAll('indices');
},
/**
* Mark the attributes needs to update.
* @param {string} [attrName]
*/
dirtyAttribute: function (attrName) {
this._cache.dirtyAll(makeAttrKey(attrName));
this._cache.dirtyAll('attributes');
},
/**
* Get indices of triangle at given index.
* @param {number} idx
* @param {Array.<number>} out
* @return {Array.<number>}
*/
getTriangleIndices: function (idx, out) {
if (idx < this.triangleCount && idx >= 0) {
if (!out) {
out = vec3Create();
}
var indices = this.indices;
out[0] = indices[idx * 3];
out[1] = indices[idx * 3 + 1];
out[2] = indices[idx * 3 + 2];
return out;
}
},
/**
* Set indices of triangle at given index.
* @param {number} idx
* @param {Array.<number>} arr
*/
setTriangleIndices: function (idx, arr) {
var indices = this.indices;
indices[idx * 3] = arr[0];
indices[idx * 3 + 1] = arr[1];
indices[idx * 3 + 2] = arr[2];
},
isUseIndices: function () {
return !!this.indices;
},
/**
* Initialize indices from an array.
* @param {Array} array
*/
initIndicesFromArray: function (array) {
var value;
var ArrayConstructor = this.vertexCount > 0xffff
? vendor.Uint32Array : vendor.Uint16Array;
// Convert 2d array to flat
Eif (array[0] && (array[0].length)) {
var n = 0;
var size = 3;
value = new ArrayConstructor(array.length * size);
for (var i = 0; i < array.length; i++) {
for (var j = 0; j < size; j++) {
value[n++] = array[i][j];
}
}
}
else {
value = new ArrayConstructor(array);
}
this.indices = value;
},
/**
* Create a new attribute
* @param {string} name
* @param {string} type
* @param {number} size
* @param {string} [semantic]
*/
createAttribute: function (name, type, size, semantic) {
var attrib = new Attribute(name, type, size, semantic);
if (this.attributes[name]) {
this.removeAttribute(name);
}
this.attributes[name] = attrib;
this._attributeList.push(name);
return attrib;
},
/**
* Remove attribute
* @param {string} name
*/
removeAttribute: function (name) {
var attributeList = this._attributeList;
var idx = attributeList.indexOf(name);
if (idx >= 0) {
attributeList.splice(idx, 1);
delete this.attributes[name];
return true;
}
return false;
},
/**
* Get attribute
* @param {string} name
* @return {clay.Geometry.Attribute}
*/
getAttribute: function (name) {
return this.attributes[name];
},
/**
* Get enabled attributes name list
* Attribute which has the same vertex number with position is treated as a enabled attribute
* @return {string[]}
*/
getEnabledAttributes: function () {
var enabledAttributes = this._enabledAttributes;
var attributeList = this._attributeList;
// Cache
if (enabledAttributes) {
return enabledAttributes;
}
var result = [];
var nVertex = this.vertexCount;
for (var i = 0; i < attributeList.length; i++) {
var name = attributeList[i];
var attrib = this.attributes[name];
if (attrib.value) {
Eif (attrib.value.length === nVertex * attrib.size) {
result.push(name);
}
}
}
this._enabledAttributes = result;
return result;
},
getBufferChunks: function (renderer) {
var cache = this._cache;
cache.use(renderer.__uid__);
var isAttributesDirty = cache.isDirty('attributes');
var isIndicesDirty = cache.isDirty('indices');
if (isAttributesDirty || isIndicesDirty) {
this._updateBuffer(renderer.gl, isAttributesDirty, isIndicesDirty);
var enabledAttributes = this.getEnabledAttributes();
for (var i = 0; i < enabledAttributes.length; i++) {
cache.fresh(makeAttrKey(enabledAttributes[i]));
}
cache.fresh('attributes');
cache.fresh('indices');
}
cache.fresh('any');
return cache.get('chunks');
},
_updateBuffer: function (_gl, isAttributesDirty, isIndicesDirty) {
var cache = this._cache;
var chunks = cache.get('chunks');
var firstUpdate = false;
Eif (!chunks) {
chunks = [];
// Intialize
chunks[0] = {
attributeBuffers: [],
indicesBuffer: null
};
cache.put('chunks', chunks);
firstUpdate = true;
}
var chunk = chunks[0];
var attributeBuffers = chunk.attributeBuffers;
var indicesBuffer = chunk.indicesBuffer;
Eif (isAttributesDirty || firstUpdate) {
var attributeList = this.getEnabledAttributes();
var attributeBufferMap = {};
Iif (!firstUpdate) {
for (var i = 0; i < attributeBuffers.length; i++) {
attributeBufferMap[attributeBuffers[i].name] = attributeBuffers[i];
}
}
// FIXME If some attributes removed
for (var k = 0; k < attributeList.length; k++) {
var name = attributeList[k];
var attribute = this.attributes[name];
var bufferInfo;
Iif (!firstUpdate) {
bufferInfo = attributeBufferMap[name];
}
var buffer;
Iif (bufferInfo) {
buffer = bufferInfo.buffer;
}
else {
buffer = _gl.createBuffer();
}
Eif (cache.isDirty(makeAttrKey(name))) {
// Only update when they are dirty.
// TODO: Use BufferSubData?
_gl.bindBuffer(_gl.ARRAY_BUFFER, buffer);
_gl.bufferData(_gl.ARRAY_BUFFER, attribute.value, this.dynamic ? glenum.DYNAMIC_DRAW : glenum.STATIC_DRAW);
}
attributeBuffers[k] = new AttributeBuffer(name, attribute.type, buffer, attribute.size, attribute.semantic);
}
// Remove unused attributes buffers.
// PENDING
for (var i = k; i < attributeBuffers.length; i++) {
_gl.deleteBuffer(attributeBuffers[i].buffer);
}
attributeBuffers.length = k;
}
Eif (this.isUseIndices() && (isIndicesDirty || firstUpdate)) {
Eif (!indicesBuffer) {
indicesBuffer = new IndicesBuffer(_gl.createBuffer());
chunk.indicesBuffer = indicesBuffer;
}
indicesBuffer.count = this.indices.length;
_gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, indicesBuffer.buffer);
_gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, this.indices, this.dynamic ? glenum.DYNAMIC_DRAW : glenum.STATIC_DRAW);
}
},
/**
* Generate normals per vertex.
*/
generateVertexNormals: function () {
Iif (!this.vertexCount) {
return;
}
var indices = this.indices;
var attributes = this.attributes;
var positions = attributes.position.value;
var normals = attributes.normal.value;
Eif (!normals || normals.length !== positions.length) {
normals = attributes.normal.value = new vendor.Float32Array(positions.length);
}
else {
// Reset
for (var i = 0; i < normals.length; i++) {
normals[i] = 0;
}
}
var p1 = vec3Create();
var p2 = vec3Create();
var p3 = vec3Create();
var v21 = vec3Create();
var v32 = vec3Create();
var n = vec3Create();
var len = indices ? indices.length : this.vertexCount;
var i1, i2, i3;
for (var f = 0; f < len;) {
Eif (indices) {
i1 = indices[f++];
i2 = indices[f++];
i3 = indices[f++];
}
else {
i1 = f++;
i2 = f++;
i3 = f++;
}
vec3Set(p1, positions[i1*3], positions[i1*3+1], positions[i1*3+2]);
vec3Set(p2, positions[i2*3], positions[i2*3+1], positions[i2*3+2]);
vec3Set(p3, positions[i3*3], positions[i3*3+1], positions[i3*3+2]);
vec3.sub(v21, p1, p2);
vec3.sub(v32, p2, p3);
vec3.cross(n, v21, v32);
// Already be weighted by the triangle area
for (var i = 0; i < 3; i++) {
normals[i1*3+i] = normals[i1*3+i] + n[i];
normals[i2*3+i] = normals[i2*3+i] + n[i];
normals[i3*3+i] = normals[i3*3+i] + n[i];
}
}
for (var i = 0; i < normals.length;) {
vec3Set(n, normals[i], normals[i+1], normals[i+2]);
vec3.normalize(n, n);
normals[i++] = n[0];
normals[i++] = n[1];
normals[i++] = n[2];
}
this.dirty();
},
/**
* Generate normals per face.
*/
generateFaceNormals: function () {
Iif (!this.vertexCount) {
return;
}
Eif (!this.isUniqueVertex()) {
this.generateUniqueVertex();
}
var indices = this.indices;
var attributes = this.attributes;
var positions = attributes.position.value;
var normals = attributes.normal.value;
var p1 = vec3Create();
var p2 = vec3Create();
var p3 = vec3Create();
var v21 = vec3Create();
var v32 = vec3Create();
var n = vec3Create();
Iif (!normals) {
normals = attributes.normal.value = new Float32Array(positions.length);
}
var len = indices ? indices.length : this.vertexCount;
var i1, i2, i3;
for (var f = 0; f < len;) {
Eif (indices) {
i1 = indices[f++];
i2 = indices[f++];
i3 = indices[f++];
}
else {
i1 = f++;
i2 = f++;
i3 = f++;
}
vec3Set(p1, positions[i1*3], positions[i1*3+1], positions[i1*3+2]);
vec3Set(p2, positions[i2*3], positions[i2*3+1], positions[i2*3+2]);
vec3Set(p3, positions[i3*3], positions[i3*3+1], positions[i3*3+2]);
vec3.sub(v21, p1, p2);
vec3.sub(v32, p2, p3);
vec3.cross(n, v21, v32);
vec3.normalize(n, n);
for (var i = 0; i < 3; i++) {
normals[i1*3 + i] = n[i];
normals[i2*3 + i] = n[i];
normals[i3*3 + i] = n[i];
}
}
this.dirty();
},
/**
* Generate tangents attributes.
*/
generateTangents: function () {
Iif (!this.vertexCount) {
return;
}
var nVertex = this.vertexCount;
var attributes = this.attributes;
Eif (!attributes.tangent.value) {
attributes.tangent.value = new Float32Array(nVertex * 4);
}
var texcoords = attributes.texcoord0.value;
var positions = attributes.position.value;
var tangents = attributes.tangent.value;
var normals = attributes.normal.value;
Iif (!texcoords) {
console.warn('Geometry without texcoords can\'t generate tangents.');
return;
}
var tan1 = [];
var tan2 = [];
for (var i = 0; i < nVertex; i++) {
tan1[i] = [0.0, 0.0, 0.0];
tan2[i] = [0.0, 0.0, 0.0];
}
var sdir = [0.0, 0.0, 0.0];
var tdir = [0.0, 0.0, 0.0];
var indices = this.indices;
var len = indices ? indices.length : this.vertexCount;
var i1, i2, i3;
for (var i = 0; i < len;) {
Eif (indices) {
i1 = indices[i++];
i2 = indices[i++];
i3 = indices[i++];
}
else {
i1 = i++;
i2 = i++;
i3 = i++;
}
var st1s = texcoords[i1 * 2],
st2s = texcoords[i2 * 2],
st3s = texcoords[i3 * 2],
st1t = texcoords[i1 * 2 + 1],
st2t = texcoords[i2 * 2 + 1],
st3t = texcoords[i3 * 2 + 1],
p1x = positions[i1 * 3],
p2x = positions[i2 * 3],
p3x = positions[i3 * 3],
p1y = positions[i1 * 3 + 1],
p2y = positions[i2 * 3 + 1],
p3y = positions[i3 * 3 + 1],
p1z = positions[i1 * 3 + 2],
p2z = positions[i2 * 3 + 2],
p3z = positions[i3 * 3 + 2];
var x1 = p2x - p1x,
x2 = p3x - p1x,
y1 = p2y - p1y,
y2 = p3y - p1y,
z1 = p2z - p1z,
z2 = p3z - p1z;
var s1 = st2s - st1s,
s2 = st3s - st1s,
t1 = st2t - st1t,
t2 = st3t - st1t;
var r = 1.0 / (s1 * t2 - t1 * s2);
sdir[0] = (t2 * x1 - t1 * x2) * r;
sdir[1] = (t2 * y1 - t1 * y2) * r;
sdir[2] = (t2 * z1 - t1 * z2) * r;
tdir[0] = (s1 * x2 - s2 * x1) * r;
tdir[1] = (s1 * y2 - s2 * y1) * r;
tdir[2] = (s1 * z2 - s2 * z1) * r;
vec3Add(tan1[i1], tan1[i1], sdir);
vec3Add(tan1[i2], tan1[i2], sdir);
vec3Add(tan1[i3], tan1[i3], sdir);
vec3Add(tan2[i1], tan2[i1], tdir);
vec3Add(tan2[i2], tan2[i2], tdir);
vec3Add(tan2[i3], tan2[i3], tdir);
}
var tmp = vec3Create();
var nCrossT = vec3Create();
var n = vec3Create();
for (var i = 0; i < nVertex; i++) {
n[0] = normals[i * 3];
n[1] = normals[i * 3 + 1];
n[2] = normals[i * 3 + 2];
var t = tan1[i];
// Gram-Schmidt orthogonalize
vec3.scale(tmp, n, vec3.dot(n, t));
vec3.sub(tmp, t, tmp);
vec3.normalize(tmp, tmp);
// Calculate handedness.
vec3.cross(nCrossT, n, t);
tangents[i * 4] = tmp[0];
tangents[i * 4 + 1] = tmp[1];
tangents[i * 4 + 2] = tmp[2];
// PENDING can config ?
tangents[i * 4 + 3] = vec3.dot(nCrossT, tan2[i]) < 0.0 ? -1.0 : 1.0;
}
this.dirty();
},
/**
* If vertices are not shared by different indices.
*/
isUniqueVertex: function () {
Eif (this.isUseIndices()) {
return this.vertexCount === this.indices.length;
}
else {
return true;
}
},
/**
* Create a unique vertex for each index.
*/
generateUniqueVertex: function () {
Iif (!this.vertexCount || !this.indices) {
return;
}
Iif (this.indices.length > 0xffff) {
this.indices = new vendor.Uint32Array(this.indices);
}
var attributes = this.attributes;
var indices = this.indices;
var attributeNameList = this.getEnabledAttributes();
var oldAttrValues = {};
for (var a = 0; a < attributeNameList.length; a++) {
var name = attributeNameList[a];
oldAttrValues[name] = attributes[name].value;
attributes[name].init(this.indices.length);
}
var cursor = 0;
for (var i = 0; i < indices.length; i++) {
var ii = indices[i];
for (var a = 0; a < attributeNameList.length; a++) {
var name = attributeNameList[a];
var array = attributes[name].value;
var size = attributes[name].size;
for (var k = 0; k < size; k++) {
array[cursor * size + k] = oldAttrValues[name][ii * size + k];
}
}
indices[i] = cursor;
cursor++;
}
this.dirty();
},
/**
* Generate barycentric coordinates for wireframe draw.
*/
generateBarycentric: function () {
Iif (!this.vertexCount) {
return;
}
Eif (!this.isUniqueVertex()) {
this.generateUniqueVertex();
}
var attributes = this.attributes;
var array = attributes.barycentric.value;
var indices = this.indices;
// Already existed;
Iif (array && array.length === indices.length * 3) {
return;
}
array = attributes.barycentric.value = new Float32Array(indices.length * 3);
for (var i = 0; i < (indices ? indices.length : this.vertexCount / 3);) {
for (var j = 0; j < 3; j++) {
var ii = indices ? indices[i++] : (i * 3 + j);
array[ii * 3 + j] = 1;
}
}
this.dirty();
},
/**
* Apply transform to geometry attributes.
* @param {clay.Matrix4} matrix
*/
applyTransform: function (matrix) {
var attributes = this.attributes;
var positions = attributes.position.value;
var normals = attributes.normal.value;
var tangents = attributes.tangent.value;
matrix = matrix.array;
// Normal Matrix
var inverseTransposeMatrix = mat4.create();
mat4.invert(inverseTransposeMatrix, matrix);
mat4.transpose(inverseTransposeMatrix, inverseTransposeMatrix);
var vec3TransformMat4 = vec3.transformMat4;
var vec3ForEach = vec3.forEach;
vec3ForEach(positions, 3, 0, null, vec3TransformMat4, matrix);
Eif (normals) {
vec3ForEach(normals, 3, 0, null, vec3TransformMat4, inverseTransposeMatrix);
}
Iif (tangents) {
vec3ForEach(tangents, 4, 0, null, vec3TransformMat4, inverseTransposeMatrix);
}
Eif (this.boundingBox) {
this.updateBoundingBox();
}
},
/**
* Dispose geometry data in GL context.
* @param {clay.Renderer} renderer
*/
dispose: function (renderer) {
var cache = this._cache;
cache.use(renderer.__uid__);
var chunks = cache.get('chunks');
Eif (chunks) {
for (var c = 0; c < chunks.length; c++) {
var chunk = chunks[c];
for (var k = 0; k < chunk.attributeBuffers.length; k++) {
var attribs = chunk.attributeBuffers[k];
renderer.gl.deleteBuffer(attribs.buffer);
}
Eif (chunk.indicesBuffer) {
renderer.gl.deleteBuffer(chunk.indicesBuffer.buffer);
}
}
}
Eif (this.__vaoCache) {
var vaoExt = renderer.getGLExtension('OES_vertex_array_object');
for (var id in this.__vaoCache) {
var vao = this.__vaoCache[id].vao;
Eif (vao) {
vaoExt.deleteVertexArrayOES(vao);
}
}
}
this.__vaoCache = {};
cache.deleteContext(renderer.__uid__);
}
});
Eif (Object.defineProperty) {
/**
* @name clay.Geometry#vertexCount
* @type {number}
* @readOnly
*/
Object.defineProperty(Geometry.prototype, 'vertexCount', {
enumerable: false,
get: function () {
var mainAttribute = this.attributes[this.mainAttribute];
Iif (!mainAttribute || !mainAttribute.value) {
return 0;
}
return mainAttribute.value.length / mainAttribute.size;
}
});
/**
* @name clay.Geometry#triangleCount
* @type {number}
* @readOnly
*/
Object.defineProperty(Geometry.prototype, 'triangleCount', {
enumerable: false,
get: function () {
var indices = this.indices;
if (!indices) {
return 0;
}
else {
return indices.length / 3;
}
}
});
}
Geometry.STATIC_DRAW = glenum.STATIC_DRAW;
Geometry.DYNAMIC_DRAW = glenum.DYNAMIC_DRAW;
Geometry.STREAM_DRAW = glenum.STREAM_DRAW;
Geometry.AttributeBuffer = AttributeBuffer;
Geometry.IndicesBuffer = IndicesBuffer;
Geometry.Attribute = Attribute;
export default Geometry;
|