* Documented Box3.applyMatrix4 doesn't work on empty boxes.

- See #8620

* Updated math Box classes' docs, style consistency.

Add high quality rand() function to common.glsl and an example to show off the noise textures. (#8603)

* create procedural glsl and an example to show off the noise textures.

* add to files.js

* adopt noise procedural in PMREMGenerator.

* fix page title per @arose's suggestion.

* more adoption of procedural.glsl

* remove procedural.glsl, add a single line to common.glsl.  Update other files as needed.

* cleanup shaders to use common.glsl

* tabify.

* avoid collapsing into a single function - @WestLangley recommendations

* more adoption of tabs.

* fix tabs.

sprite plugin: do not check texture.image, it allows to used textures created by RenderTarget (#8619)

* MatrixN: Deprecated .flattenToArrayOffset.

Instead .toArray consistently allows array and offset to be passed.

* Updated math classes' docs .toArray / .fromArray.

* Automated uniform.<name>.type.

* WebGLRenderer: Added .setTexture deprecation stub.

* Updated ShaderMaterial docs, uniform types.

* Updated Quaternion docs .toArray / .fromArray.

* Updated Quaternion docs, static .slerpFlat.

* Updated math classes' docs, style consistency.

* Updated ShaderMaterial docs, style consistency.

This helps when when the bounding box is not computed from an object, but comes from elsewhere

When Wrap Mode data is missing, fallback to Collada spec default repeated wrapping. Without this change the wrapping is clamped to edge which should not be the default behaviour.

* Examples: Fix Firefox error in "webgl_interactive_cubes_gpu"

* Revert "Examples: Fix Firefox error in "webgl_interactive_cubes_gpu""

This reverts commit f2130cc1afb18794ac30a7a85d69795e6b23dd40.

* WebGLRenderer: Ensure valid read requests in .readRenderTargetPixels

* remove ability to set depth formula on MeshDepthMaterial.

* remove depth formulas

* decouple PerspectiveCamera parameters in ObjectLoader. see comment: https://github.com/mrdoob/three.js/pull/8561/files/7eea5d47d86a6376175761cddab2742f17de177f#r59205742

* null -> undefined checking of data.view

* only export view if defined.

I noticed this was missing after updating from an older version of ColladaLoader.js. This fixes the face materialIndex not being set.

* WebGLProgram: Rewrote uniform name parser.

* Revised structured uniforms.

- Allowed arbitrary nesting
- Removed map iteration

This allows users to specify an offset angle for the alpha value. Can be used to set an initial view direction when the device orientation controls are called.

(Also ran it through whitespace checker)

This PR replaces the deprecated .center with .target for all
THREE.OrbitControls objects.

* working on depth texture

* working on depth texture

* support depth texture in webgl1 and webgl2

* fix comments

* reset build to avoid diff noise

* add check for webgl2 context

* fix depth texture example

* animation for example

* add file

* add depthTexture to WebGLRenderTarget

* ensure depth format returns correct GL parmaeter

* use null for initial depthTexture value

* add some commented out code

* remove non existent property "dynamic"

* colorsNeedUpdate required for face3 color updates

* documents groupsNeedUpdate

* document areaWeighted parameter of method computeVertexNormals