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/* <copyright>
This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
(c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved.
</copyright> */
///////////////////////////////////////////////////////////////////////
// Class GLPath
// GL representation of a path.
// Derived from class GLGeomObj
// The position and dimensions of the stroke, fill, and inner Radius should be in pixels
///////////////////////////////////////////////////////////////////////
function GLPath()
{
// initialize the inherited members
this.inheritedFrom = GLGeomObj;
this.inheritedFrom();
this.init = function( world, dataArray, typeArray, strokeWidth, strokeColor, strokeMaterial )
{
///////////////////////////////////////////////////////////////////////
// Instance variables
///////////////////////////////////////////////////////////////////////
// stroke
this._strokeWidth = 0.25;
this._strokeColor = strokeColor;
this._strokeMaterial = strokeMaterial;
// data
this._dataArray = dataArray.slice(0);
this._typeArray = typeArray.slice(0);
this._world = world;
}
///////////////////////////////////////////////////////////////////////
// Property Accessors
///////////////////////////////////////////////////////////////////////
this.getStrokeWidth = function() { return this._strokeWidth; }
this.setStrokeWidth = function(w) { this._strokeWidth = w; }
this.getStrokeMaterial = function() { return this._strokeMaterial; }
this.setStrokeMaterial = function(m) { this._strokeMaterial = m; }
this.getWorld = function() { return this._world; }
this.setWorld = function(w) { this._world = w; }
this.geomType = function() { return this.GEOM_TYPE_PATH; }
///////////////////////////////////////////////////////////////////////
// Methods
///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////
// update the "color of the material
this.getStrokeColor = function()
{
return this._strokeColor;
}
// this.setStrokeColor = function(c)
// {
// this._strokeColor = c;
// }
///////////////////////////////////////////////////////////////////////
this.buildBuffers = function()
{
// currently no GL representation
}
this.render = function()
{
// get the world
var world = this.getWorld();
if (!world) throw( "null world in buildBuffers" );
// get the context
var ctx = world.get2DContext();
if (!ctx) return;
// create the matrix
var lineWidth = this._strokeWidth;
// set up the stroke style
ctx.beginPath();
ctx.lineWidth = lineWidth;
ctx.strokeStyle = "#0000ff";
if (this._strokeColor)
ctx.strokeStyle = MathUtils.colorToHex( this._strokeColor );
// declarations
var pt, p0, p1, p2;
// draw the stroke
var index = 0;
var dataIndex = 0;
var n = this._typeArray.length;
while (index < n)
{
var type = this._typeArray[index];
index++;
switch (type)
{
case 0: // moveTo
pt = this._dataArray[dataIndex];
dataIndex++;
ctx.moveTo( pt[0], pt[1] );
break;
case 1: // line
pt = this._dataArray[dataIndex];
dataIndex++;
ctx.lineTo( pt[0], pt[1] );
break;
case 2: // quadratic Bezier
p0 = this._dataArray[dataIndex]; dataIndex++;
p1 = this._dataArray[dataIndex]; dataIndex++;
ctx.quadraticCurveTo( p0[0], p0[1], p1[0], p1[1] );
break;
case 3: // cubic Bezier
p0 = this._dataArray[dataIndex]; dataIndex++;
p1 = this._dataArray[dataIndex]; dataIndex++;
p2 = this._dataArray[dataIndex]; dataIndex++;
ctx.bezierCurveTo( p0[0], p0[1], p1[0], p1[1], p2[0], p2[1] );
break;
default:
console.log( "unsupported path type: " + type );
break;
}
}
// render the stroke
ctx.stroke();
}
this.export = function()
{
var rtnStr = "type: " + this.geomType() + "\n";
rtnStr += "strokeWidth: " + this._strokeWidth + "\n";
rtnStr += "strokeMat: ";
if (this._strokeMaterial)
rtnStr += this._strokeMaterial.getName();
else
rtnStr += "flatMaterial";
rtnStr += "\n";
return rtnStr;
}
this.import = function( importStr )
{
this._strokeWidth = this.getPropertyFromString( "strokeWidth: ", importStr );
var strokeMaterialName = this.getPropertyFromString( "strokeMat: ", importStr );
var strokeMat = MaterialsLibrary.getMaterial( strokeMaterialName );
if (!strokeMat)
{
console.log( "object material not found in library: " + strokeMaterialName );
strokeMat = new FlatMaterial();
}
this._strokeMaterial = strokeMat;
}
this.collidesWithPoint = function( x, y )
{
return false;
}
this.containsPoint = function( pt, dir )
{
return false;
}
this.getNearPoint = function( pt, dir )
{
var world = this.getWorld();
if (!world) throw( "null world in getNearPoint" );
// get a point on the plane of the circle
// the point is in NDC, as is the input parameters
var mat = this.getMatrix();
var plane = [0,0,1,0];
plane = MathUtils.transformPlane( plane, mat );
var projPt = MathUtils.vecIntersectPlane ( pt, dir, plane );
// transform the projected point back to the XY plane
//var invMat = mat.inverse();
var invMat = glmat4.inverse( mat, [] );
var planePt = MathUtils.transformPoint( projPt, invMat );
// get the normalized device coordinates (NDC) for
// the position and radii.
var vpw = world.getViewportWidth(), vph = world.getViewportHeight();
var xNDC = 2*this._xOffset/vpw, yNDC = 2*this._yOffset/vph;
var projMat = world.makePerspectiveMatrix();
var z = -world.getViewDistance();
var planePtNDC = planePt.slice(0);
planePtNDC[2] = z;
planePtNDC = MathUtils.transformHomogeneousPoint( planePtNDC, projMat );
planePtNDC = MathUtils.applyHomogeneousCoordinate( planePtNDC );
// get the gl coordinates
var aspect = world.getAspect();
var zn = world.getZNear(), zf = world.getZFar();
var t = zn * Math.tan(world.getFOV() * Math.PI / 360.0),
b = -t,
r = aspect*t,
l = -r;
// convert to GL coordinates
var objPt = [0, 0, 0];
objPt[0] = -z*(r-l)/(2.0*zn)*objPt[0];
objPt[1] = -z*(t-b)/(2.0*zn)*objPt[1];
// re-apply the transform
objPt = MathUtils.transformPoint( objPt, mat );
return objPt;
}
}
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