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Collision detection for double sided mesh faces.

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This commit is contained in:
Nik Van den Wijngaert
2011-07-03 12:14:45 +02:00
parent 78fb8ac6f8
commit 797068131d
1 changed files with 19 additions and 6 deletions
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src/extras/physics/Collisions.js
+19 -6
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@@ -152,7 +152,7 @@ THREE.CollisionSystem.prototype.rayMesh = function( r, me ) {
var p3 = face instanceof THREE.Face4 ? me.mesh.geometry.vertices[ face.d ].position : null;
if (face instanceof THREE.Face3) {
var nd = this.rayTriangle( rt, p0, p1, p2, d, this.collisionNormal );
var nd = this.rayTriangle( rt, p0, p1, p2, d, this.collisionNormal, me.mesh.doubleSided );
if( nd < d ) {
@@ -167,7 +167,7 @@ THREE.CollisionSystem.prototype.rayMesh = function( r, me ) {
else if (face instanceof THREE.Face4) {
var nd = this.rayTriangle( rt, p0, p1, p3, d, this.collisionNormal );
var nd = this.rayTriangle( rt, p0, p1, p3, d, this.collisionNormal, me.mesh.doubleSided );
if( nd < d ) {
@@ -178,7 +178,7 @@ THREE.CollisionSystem.prototype.rayMesh = function( r, me ) {
}
nd = this.rayTriangle( rt, p1, p2, p3, d, this.collisionNormal );
nd = this.rayTriangle( rt, p1, p2, p3, d, this.collisionNormal, me.mesh.doubleSided );
if( nd < d ) {
@@ -188,7 +188,7 @@ THREE.CollisionSystem.prototype.rayMesh = function( r, me ) {
me.normal.normalize();
}
}
}
@@ -197,7 +197,7 @@ THREE.CollisionSystem.prototype.rayMesh = function( r, me ) {
};
THREE.CollisionSystem.prototype.rayTriangle = function( ray, p0, p1, p2, mind, n ) {
THREE.CollisionSystem.prototype.rayTriangle = function( ray, p0, p1, p2, mind, n, doubleSided ) {
var e1 = THREE.CollisionSystem.__v1,
e2 = THREE.CollisionSystem.__v2;
@@ -211,7 +211,20 @@ THREE.CollisionSystem.prototype.rayTriangle = function( ray, p0, p1, p2, mind, n
n.cross( e1, e2 )
var dot = n.dot( ray.direction );
if ( !( dot < 0 ) ) return Number.MAX_VALUE;
if ( !( dot < 0 ) ) {
if ( doubleSided ) {
n.multiplyScalar (-1.0);
dot *= -1.0;
} else {
return Number.MAX_VALUE;
}
}
var d = n.dot( p0 );
var t = d - n.dot( ray.origin );