Package Exports

slide-along-wall
slide-along-wall/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (slide-along-wall) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

slide-along-wall

slide a point along a wall / implicit surface / triangle mesh [eg for games, slide camera along wall upon collision]

Installation

npm i slide-along-wall

Usage

var saw = require('slide-along-wall');

var camera_oldPosition = [0,10,0]; //old camera position [x,y,z]
var camera_newPosition = [0,-10,0]; //desired camera position after some movement

//usage with list of triangles:

var triangles = [ triangle1, triangle2, ... ]; //each triangle = [[x,y,z],[x,y,z],[x,y,z]]
var camera_positionAfterSliding = 
    saw.slideAlongTriangles(camera_newPosition, camera_oldPosition, triangles) 

// optional raytracingFunction param: 
// saw.slideAlongTriangles(camera_newPosition, camera_oldPosition, triangles, raytracingFunction)
////   raytracingFunction is auto-generated if not provided, 
////   and can be pulled out after and reused with saw.getRecentTracingFunction(),
////   or you can generate one separately with saw.generateTracingFunction(triangles)
    

//usage with implicit surface / distance function:

var distanceFunction = function(x,y,z){
    return y; //this function represents a "floor"
}

var camera_positionAfterSliding = 
    saw.slideAlongDistanceFunction(camera_newPosition, camera_oldPosition, distanceFunction);