Extracts the planes for a WebGL viewing frustum
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README.md

extract-frustum-planes

Returns a list of frustum planes from a given WebGL matrix (assuming the matrix is stored in the same format as used by gl-matrix).

Install

npm install extract-frustum-planes

Example

var getPlanes = require("extract-frustum-planes")

var glm = require("gl-matrix")
var m = glm.mat4.perspective()

API

require("extract-frustum-planes")(worldToClip[, zNear, zFar])

Extracts the frustum planes of the combined world to clip coordinate matrix for WebGL

  • worldToClip is the concatenated model-view-projection matrix in the same format as expected by WebGL (ie compatible with gl-matrix)
  • zNear is the near clip plane distance as set by gl.depthRange (default 0.0)
  • zFar is the far clip plane distance as set by gl.depthRange

Returns An array of 6 planes encoding the view frustum stored in the order:

  • left
  • right
  • top
  • bottom
  • near
  • far

Credits

(c) 2013 Mikola Lysenko. MIT License