src/net/habraun/sd/SimpleNarrowPhase.scala

   1 /*
   2         Copyright (c) 2009 Hanno Braun <hanno@habraun.net>
   3
   4         Licensed under the Apache License, Version 2.0 (the "License");
   5         you may not use this file except in compliance with the License.
   6         You may obtain a copy of the License at
   7
   8                 http://www.apache.org/licenses/LICENSE-2.0
   9
  10         Unless required by applicable law or agreed to in writing, software
  11         distributed under the License is distributed on an "AS IS" BASIS,
  12         WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13         See the License for the specific language governing permissions and
  14         limitations under the License.
  15 */
  16
  17
  18
  19 package net.habraun.sd
  20
  21
  22
  23 import collision._
  24 import math._
  25
  26
  27
  28 class SimpleNarrowPhase extends NarrowPhase {
  29
  30         var testCircleCircle: CircleCircleTest = new ContinuousCircleCircleTest
  31         var testCircleLineSegment: CircleLineSegmentTest = new ContinuousCircleLineSegmentTest
  32
  33
  34
  35         def inspectCollision(delta: Double, b1: Body, b2: Body) = b1.shape match {
  36                 case s1: Circle =>
  37                         b2.shape match {
  38                                 case s2: Circle =>
  39                                         for (r <- testCircleCircle(s1, s2, b1.position, b2.position, b1.velocity * delta,
  40                                                         b2.velocity * delta)) yield {
  41                                                 Collision(r.t, Contact(b1, r.contact, r.normal, b2),
  42                                                                 Contact(b2, r.contact, -r.normal, b1))
  43                                         }
  44
  45                                 case s2: LineSegment =>
  46                                         for (r <- testCircleLineSegment(s1, s2, b1.position, b2.position, b1.velocity * delta,
  47                                                         b2.velocity * delta)) yield {
  48                                                 Collision(r.t, Contact(b1, r.contact, r.normal, b2),
  49                                                                 Contact(b2, r.contact, -r.normal, b1))
  50                                         }
  51
  52                                 case _ =>
  53                                         None
  54                         }
  55
  56                 case s1: LineSegment =>
  57                         b2.shape match {
  58                                 case s2: Circle =>
  59                                         for (r <- testCircleLineSegment(s2, s1, b2.position, b1.position, b2.velocity * delta,
  60                                                         b1.velocity * delta)) yield {
  61                                                 Collision(r.t, Contact(b1, r.contact, r.normal, b2),
  62                                                                 null)
  63                                         }
  64
  65                                 case s2: LineSegment =>
  66                                         None
  67
  68                                 case _ =>
  69                                         None
  70                         }
  71
  72                 case _ =>
  73                         None
  74         }
  75 }