tst/world/FloorTest.cpp

   1 #include "FloorTest.hpp"
   2
   3 #include "../vector_assert.hpp"
   4
   5 #include <world/Floor.hpp>
   6
   7 #include <glm/gtx/io.hpp>
   8
   9 CPPUNIT_TEST_SUITE_REGISTRATION(tacos::test::FloorTest);
  10
  11 namespace tacos {
  12 namespace test {
  13
  14 void FloorTest::setUp() {
  15 }
  16
  17 void FloorTest::tearDown() {
  18 }
  19
  20
  21 void FloorTest::testIntersection() {
  22         Floor floor(33, 33);
  23         Ray ray;
  24         glm::vec3 point;
  25
  26         // default floor has all heights at 0, so a ray within the grid at height 1 pointing
  27         // straight down should intersect it
  28         // this ray hits the triangle somewhere near the middle
  29         ray.origin = glm::vec3(0.5f, 1.0f, 0.75f);
  30         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  31         CPPUNIT_ASSERT_MESSAGE(
  32                 "ray pointing down at a triangle does not intersect floor when it should",
  33                 floor.Intersection(ray, point)
  34         );
  35         AssertEqual(
  36                 "unexpected intersection point",
  37                 glm::vec3(0.5f, 0.0f, 0.75f), point
  38         );
  39         // this ray should hit on the low X edge of the triangle
  40         ray.origin = glm::vec3(0.0f, 1.0f, 0.5f);
  41         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  42         CPPUNIT_ASSERT_MESSAGE(
  43                 "ray pointing down at a low X triangle edge does not intersect floor when it should",
  44                 floor.Intersection(ray, point)
  45         );
  46         AssertEqual(
  47                 "unexpected intersection point",
  48                 glm::vec3(0.0f, 0.0f, 0.5f), point
  49         );
  50         // this ray should hit on the low Z edge of the triangle
  51         ray.origin = glm::vec3(0.5f, 1.0f, 0.0f);
  52         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  53         CPPUNIT_ASSERT_MESSAGE(
  54                 "ray pointing down  at a low Z triangle edgedoes not intersect floor when it should",
  55                 floor.Intersection(ray, point)
  56         );
  57         AssertEqual(
  58                 "unexpected intersection point",
  59                 glm::vec3(0.5f, 0.0f, 0.0f), point
  60         );
  61         // this ray should hit on the diagonal edge of the triangle
  62         ray.origin = glm::vec3(0.5f, 1.0f, 0.5f);
  63         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  64         CPPUNIT_ASSERT_MESSAGE(
  65                 "ray pointing down at a diagonal triangle edgedoes not intersect floor when it should",
  66                 floor.Intersection(ray, point)
  67         );
  68         AssertEqual(
  69                 "unexpected intersection point",
  70                 glm::vec3(0.5f, 0.0f, 0.5f), point
  71         );
  72         // this ray points straight away from the floor, so should not intersect
  73         ray.origin = glm::vec3(0.5f, 1.0f, 0.5f);
  74         ray.direction = glm::vec3(0.0f, 1.0f, 0.0f);
  75         CPPUNIT_ASSERT_MESSAGE(
  76                 "ray pointing up intersects floor when it shouldn't",
  77                 !floor.Intersection(ray, point)
  78         );
  79         // this ray start below the floor and points down, so stays "underground" the whole time
  80         ray.origin = glm::vec3(0.5f, -1.0f, 0.5f);
  81         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  82         CPPUNIT_ASSERT_MESSAGE(
  83                 "ray pointing down intersects floor when it shouldn't",
  84                 !floor.Intersection(ray, point)
  85         );
  86         // this ray start below the floor and points up, that means it intersects, although from the unexpected side
  87         ray.origin = glm::vec3(0.5f, -1.0f, 0.5f);
  88         ray.direction = glm::vec3(0.0f, 1.0f, 0.0f);
  89         CPPUNIT_ASSERT_MESSAGE(
  90                 "ray below the floor pointing up does not intersect floor when it should",
  91                 floor.Intersection(ray, point)
  92         );
  93         AssertEqual(
  94                 "unexpected intersection point",
  95                 glm::vec3(0.5f, 0.0f, 0.5f), point
  96         );
  97
  98         ray.origin = glm::vec3(0.0f, 1.0f, 1.0f);
  99         ray.direction = glm::normalize(glm::vec3(1.0f, -1.0f, 0.0f));
 100         CPPUNIT_ASSERT_MESSAGE(
 101                 "diagonal ray, starts 1 unit above the floor and points down and to the right does not intersect floor when it should",
 102                 floor.Intersection(ray, point)
 103         );
 104         AssertEqual(
 105                 "unexpected intersection point",
 106                 glm::vec3(1.0f, 0.0f, 1.0f), point
 107         );
 108         // the same ray, but with origin outside the XZ grid
 109         ray.origin = glm::vec3(-1.0f, 2.0f, 1.0f);
 110         ray.direction = glm::normalize(glm::vec3(1.0f, -1.0f, 0.0f));
 111         CPPUNIT_ASSERT_MESSAGE(
 112                 "ray entering from the left does not intersect floor when it should",
 113                 floor.Intersection(ray, point)
 114         );
 115         AssertEqual(
 116                 "unexpected intersection point",
 117                 glm::vec3(1.0f, 0.0f, 1.0f), point
 118         );
 119         ray.origin = glm::vec3(3.0f, 2.0f, 1.0f);
 120         ray.direction = glm::normalize(glm::vec3(-1.0f, -1.0f, 0.0f));
 121         CPPUNIT_ASSERT_MESSAGE(
 122                 "ray entering from the right does not intersect floor when it should",
 123                 floor.Intersection(ray, point)
 124         );
 125         AssertEqual(
 126                 "unexpected intersection point",
 127                 glm::vec3(1.0f, 0.0f, 1.0f), point
 128         );
 129         ray.origin = glm::vec3(1.0f, 1.0f, 1.0f);
 130         ray.direction = glm::normalize(glm::vec3(1.0f, 0.0f, 1.0f));
 131         CPPUNIT_ASSERT_MESSAGE(
 132                 "ray parallel to the floor intersects floor when it shouldn't",
 133                 !floor.Intersection(ray, point)
 134         );
 135
 136         ray.origin = glm::vec3(19.993f, 49.947f, 106.518f);
 137         ray.direction = glm::normalize(glm::vec3(-0.07f, -0.528f, -0.846f));
 138         CPPUNIT_ASSERT_MESSAGE(
 139                 "weird ray from interactive testing doesn't intersect :(",
 140                 floor.Intersection(ray, point)
 141         );
 142         AssertEqual(
 143                 "unexpected intersection point",
 144                 glm::vec3(13.37123870f, 0.0f, 26.48928486f), point,
 145                 0.00001f // using custom delta since values above are somewhat rounded/truncated
 146         );
 147         ray.origin = glm::vec3(19.995f, 49.952f, 106.515f);
 148         ray.direction = glm::normalize(glm::vec3(-0.046f, -0.477f, -0.878f));
 149         CPPUNIT_ASSERT_MESSAGE(
 150                 "weird ray from interactive testing doesn't intersect :(",
 151                 floor.Intersection(ray, point)
 152         );
 153         AssertEqual(
 154                 "unexpected intersection point",
 155                 glm::vec3(15.17783f, 0.0f, 14.5698f), point,
 156                 0.00001f
 157         );
 158 }
 159
 160 }
 161 }