diff options
Diffstat (limited to 'js/helper-classes/3D/StageLine.js')
| -rwxr-xr-x | js/helper-classes/3D/StageLine.js | 76 |
1 files changed, 43 insertions, 33 deletions
diff --git a/js/helper-classes/3D/StageLine.js b/js/helper-classes/3D/StageLine.js index 787a4568..aaa9f95d 100755 --- a/js/helper-classes/3D/StageLine.js +++ b/js/helper-classes/3D/StageLine.js | |||
| @@ -246,49 +246,59 @@ var StageLine = exports.StageLine = Object.create(Object.prototype, { | |||
| 246 | if (s0 != s1) | 246 | if (s0 != s1) |
| 247 | { | 247 | { |
| 248 | var t = Math.abs(d0)/( Math.abs(d0) + Math.abs(d1) ); | 248 | var t = Math.abs(d0)/( Math.abs(d0) + Math.abs(d1) ); |
| 249 | if (t == 0) | 249 | if (MathUtils.fpSign(t) === 0) |
| 250 | { | 250 | { |
| 251 | if (s1 > 0) // entering the material from the beginning of the line that is to be drawn | 251 | // the first point of the line is on the (infinite) extension of a side of the boundary. |
| 252 | // Make sure the point (pt0) is within the range of the polygon edge | ||
| 253 | var vt0 = vecUtils.vecSubtract(3, pt0, bp0), | ||
| 254 | vt1 = vecUtils.vecSubtract(3, bp1, pt0); | ||
| 255 | var dt0 = vecUtils.vecDot(3, vec, vt0), | ||
| 256 | dt1 = vecUtils.vecDot(3, vec, vt1); | ||
| 257 | var st0 = MathUtils.fpSign(dt0), st1 = MathUtils.fpSign(dt1); | ||
| 258 | if ((st0 >= 0) && (st1 >= 0)) | ||
| 252 | { | 259 | { |
| 253 | // see if the start point of the line is at a corner of the bounded plane | 260 | if (s1 > 0) // entering the material from the beginning of the line that is to be drawn |
| 254 | var lineDir = vecUtils.vecSubtract(3, pt1, pt0); | ||
| 255 | vecUtils.vecNormalize(3, lineDir); | ||
| 256 | var dist = vecUtils.vecDist( 3, pt0, bp1 ); | ||
| 257 | var bp2, bv0, bv1, cross1, cross2, cross3; | ||
| 258 | if ( MathUtils.fpSign(dist) == 0) | ||
| 259 | { | 261 | { |
| 260 | bp2 = boundaryPts[(i+1) % 4]; | 262 | // see if the start point of the line is at a corner of the bounded plane |
| 261 | bv0 = vecUtils.vecSubtract(3, bp2, bp1); | 263 | var lineDir = vecUtils.vecSubtract(3, pt1, pt0); |
| 262 | bv1 = vecUtils.vecSubtract(3, bp0, bp1); | 264 | vecUtils.vecNormalize(3, lineDir); |
| 263 | cross1 = vecUtils.vecCross(3, bv0, lineDir); | 265 | var dist = vecUtils.vecDist( 3, pt0, bp1 ); |
| 264 | cross2 = vecUtils.vecCross(3, lineDir, bv1); | 266 | var bp2, bv0, bv1, cross1, cross2, cross3; |
| 265 | cross3 = vecUtils.vecCross(3, bv0, bv1); | 267 | if ( MathUtils.fpSign(dist) == 0) |
| 266 | if ( (MathUtils.fpSign(vecUtils.vecDot(3, cross1, cross3)) == 0) && (MathUtils.fpSign(vecUtils.vecDot(3, cross2, cross3)) == 0)) | ||
| 267 | { | 268 | { |
| 268 | gotEnter = true; | 269 | bp2 = boundaryPts[(i+1) % 4]; |
| 269 | this.addIntersection( plane, t, 1 ); | 270 | bv0 = vecUtils.vecSubtract(3, bp2, bp1); |
| 271 | bv1 = vecUtils.vecSubtract(3, bp0, bp1); | ||
| 272 | cross1 = vecUtils.vecCross(3, bv0, lineDir); | ||
| 273 | cross2 = vecUtils.vecCross(3, lineDir, bv1); | ||
| 274 | cross3 = vecUtils.vecCross(3, bv0, bv1); | ||
| 275 | if ( (MathUtils.fpSign(vecUtils.vecDot(3, cross1, cross3)) == 0) && (MathUtils.fpSign(vecUtils.vecDot(3, cross2, cross3)) == 0)) | ||
| 276 | { | ||
| 277 | gotEnter = true; | ||
| 278 | this.addIntersection( plane, t, 1 ); | ||
| 279 | } | ||
| 270 | } | 280 | } |
| 271 | } | 281 | else if (MathUtils.fpSign( vecUtils.vecDist(3, pt0, bp0)) === 0) |
| 272 | else if (MathUtils.fpSign( vecUtils.vecDist(3, pt0, bp0)) === 0) | ||
| 273 | { | ||
| 274 | bp2 = boundaryPts[(i+2) % 4]; | ||
| 275 | bv0 = vecUtils.vecSubtract(3, bp2, bp0); | ||
| 276 | bv1 = vecUtils.vecSubtract(3, bp1, bp0); | ||
| 277 | cross1 = vecUtils.vecCross(3, bv0, lineDir); | ||
| 278 | cross2 = vecUtils.vecCross(3, lineDir, bv1); | ||
| 279 | cross3 = vecUtils.vecCross(3, bv0, bv1); | ||
| 280 | if ( (MathUtils.fpSign(vecUtils.vecDot(3, cross1, cross3)) == 0) && (MathUtils.fpSign(vecUtils.vecDot(3, cross2, cross3)) == 0)) | ||
| 281 | { | 282 | { |
| 283 | bp2 = boundaryPts[(i+2) % 4]; | ||
| 284 | bv0 = vecUtils.vecSubtract(3, bp2, bp0); | ||
| 285 | bv1 = vecUtils.vecSubtract(3, bp1, bp0); | ||
| 286 | cross1 = vecUtils.vecCross(3, bv0, lineDir); | ||
| 287 | cross2 = vecUtils.vecCross(3, lineDir, bv1); | ||
| 288 | cross3 = vecUtils.vecCross(3, bv0, bv1); | ||
| 289 | if ( (MathUtils.fpSign(vecUtils.vecDot(3, cross1, cross3)) == 0) && (MathUtils.fpSign(vecUtils.vecDot(3, cross2, cross3)) == 0)) | ||
| 290 | { | ||
| 291 | gotEnter = true; | ||
| 292 | this.addIntersection( plane, t, 1 ); | ||
| 293 | } | ||
| 294 | } | ||
| 295 | else | ||
| 296 | { | ||
| 297 | // check if the line is on the edge of the boundary or goes to the interior | ||
| 282 | gotEnter = true; | 298 | gotEnter = true; |
| 283 | this.addIntersection( plane, t, 1 ); | 299 | this.addIntersection( plane, t, 1 ); |
| 284 | } | 300 | } |
| 285 | } | 301 | } |
| 286 | else | ||
| 287 | { | ||
| 288 | // check if the line is on the edge of the boundary or goes to the interior | ||
| 289 | gotEnter = true; | ||
| 290 | this.addIntersection( plane, t, 1 ); | ||
| 291 | } | ||
| 292 | } | 302 | } |
| 293 | } | 303 | } |
| 294 | else if ( (MathUtils.fpSign(t) > 0) && (MathUtils.fpCmp(t,1.0) <= 0)) | 304 | else if ( (MathUtils.fpSign(t) > 0) && (MathUtils.fpCmp(t,1.0) <= 0)) |