tst/world/FloorTest.cpp

   1 #include "FloorTest.hpp"
   2
   3 #include "../vector_assert.hpp"
   4
   5 #include <world/Floor.hpp>
   6
   7 CPPUNIT_TEST_SUITE_REGISTRATION(tacos::test::FloorTest);
   8
   9 namespace tacos {
  10 namespace test {
  11
  12 void FloorTest::setUp() {
  13 }
  14
  15 void FloorTest::tearDown() {
  16 }
  17
  18
  19 void FloorTest::testIntersection() {
  20         Floor floor(33, 33);
  21         Ray ray;
  22         glm::vec3 point;
  23
  24         // default floor has all heights at 0, so a ray within the grid at height 1 pointing
  25         // straight down should intersect it
  26         // this ray hits the triangle somewhere near the middle
  27         ray.origin = glm::vec3(0.5f, 1.0f, 0.75f);
  28         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  29         CPPUNIT_ASSERT_MESSAGE(
  30                 "ray pointing down at a triangle does not intersect floor when it should",
  31                 floor.Intersection(ray, point)
  32         );
  33         AssertEqual(
  34                 "unexpected intersection point",
  35                 glm::vec3(0.5f, 0.0f, 0.75f), point
  36         );
  37         // this ray should hit on the low X edge of the triangle
  38         ray.origin = glm::vec3(0.0f, 1.0f, 0.5f);
  39         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  40         CPPUNIT_ASSERT_MESSAGE(
  41                 "ray pointing down at a low X triangle edge does not intersect floor when it should",
  42                 floor.Intersection(ray, point)
  43         );
  44         AssertEqual(
  45                 "unexpected intersection point",
  46                 glm::vec3(0.0f, 0.0f, 0.5f), point
  47         );
  48         // this ray should hit on the low Z edge of the triangle
  49         ray.origin = glm::vec3(0.5f, 1.0f, 0.0f);
  50         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  51         CPPUNIT_ASSERT_MESSAGE(
  52                 "ray pointing down  at a low Z triangle edgedoes not intersect floor when it should",
  53                 floor.Intersection(ray, point)
  54         );
  55         AssertEqual(
  56                 "unexpected intersection point",
  57                 glm::vec3(0.5f, 0.0f, 0.0f), point
  58         );
  59         // this ray should hit on the diagonal edge of the triangle
  60         ray.origin = glm::vec3(0.5f, 1.0f, 0.5f);
  61         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  62         CPPUNIT_ASSERT_MESSAGE(
  63                 "ray pointing down at a diagonal triangle edgedoes not intersect floor when it should",
  64                 floor.Intersection(ray, point)
  65         );
  66         AssertEqual(
  67                 "unexpected intersection point",
  68                 glm::vec3(0.5f, 0.0f, 0.5f), point
  69         );
  70         // this ray points straight away from the floor, so should not intersect
  71         ray.origin = glm::vec3(0.5f, 1.0f, 0.5f);
  72         ray.direction = glm::vec3(0.0f, 1.0f, 0.0f);
  73         CPPUNIT_ASSERT_MESSAGE(
  74                 "ray pointing up intersects floor when it shouldn't",
  75                 !floor.Intersection(ray, point)
  76         );
  77         // this ray start below the floor and points down, so stays "underground" the whole time
  78         ray.origin = glm::vec3(0.5f, -1.0f, 0.5f);
  79         ray.direction = glm::vec3(0.0f, -1.0f, 0.0f);
  80         CPPUNIT_ASSERT_MESSAGE(
  81                 "ray pointing down intersects floor when it shouldn't",
  82                 !floor.Intersection(ray, point)
  83         );
  84         // this ray start below the floor and points up, that means it intersects, although from the unexpected side
  85         ray.origin = glm::vec3(0.5f, -1.0f, 0.5f);
  86         ray.direction = glm::vec3(0.0f, 1.0f, 0.0f);
  87         CPPUNIT_ASSERT_MESSAGE(
  88                 "ray below the floor pointing up does not intersect floor when it should",
  89                 floor.Intersection(ray, point)
  90         );
  91         AssertEqual(
  92                 "unexpected intersection point",
  93                 glm::vec3(0.5f, 0.0f, 0.5f), point
  94         );
  95
  96         ray.origin = glm::vec3(0.0f, 1.0f, 1.0f);
  97         ray.direction = glm::normalize(glm::vec3(1.0f, -1.0f, 0.0f));
  98         CPPUNIT_ASSERT_MESSAGE(
  99                 "diagonal ray, starts 1 unit above the floor and points down and to the right does not intersect floor when it should",
 100                 floor.Intersection(ray, point)
 101         );
 102         AssertEqual(
 103                 "unexpected intersection point",
 104                 glm::vec3(1.0f, 0.0f, 1.0f), point
 105         );
 106         // the same ray, but with origin outside the XZ grid
 107         ray.origin = glm::vec3(-1.0f, 2.0f, 1.0f);
 108         ray.direction = glm::normalize(glm::vec3(1.0f, -1.0f, 0.0f));
 109         CPPUNIT_ASSERT_MESSAGE(
 110                 "ray entering from the left does not intersect floor when it should",
 111                 floor.Intersection(ray, point)
 112         );
 113         AssertEqual(
 114                 "unexpected intersection point",
 115                 glm::vec3(1.0f, 0.0f, 1.0f), point
 116         );
 117         ray.origin = glm::vec3(3.0f, 2.0f, 1.0f);
 118         ray.direction = glm::normalize(glm::vec3(-1.0f, -1.0f, 0.0f));
 119         CPPUNIT_ASSERT_MESSAGE(
 120                 "ray entering from the right does not intersect floor when it should",
 121                 floor.Intersection(ray, point)
 122         );
 123         AssertEqual(
 124                 "unexpected intersection point",
 125                 glm::vec3(1.0f, 0.0f, 1.0f), point
 126         );
 127         ray.origin = glm::vec3(1.0f, 1.0f, 1.0f);
 128         ray.direction = glm::normalize(glm::vec3(1.0f, 0.0f, 1.0f));
 129         CPPUNIT_ASSERT_MESSAGE(
 130                 "ray parallel to the floor intersects floor when it shouldn't",
 131                 !floor.Intersection(ray, point)
 132         );
 133
 134         ray.origin = glm::vec3(19.993f, 49.947f, 106.518f);
 135         ray.direction = glm::normalize(glm::vec3(-0.07f, -0.528f, -0.846f));
 136         CPPUNIT_ASSERT_MESSAGE(
 137                 "weird ray #1 from interactive testing doesn't intersect :(",
 138                 floor.Intersection(ray, point)
 139         );
 140         AssertEqual(
 141                 "unexpected intersection point",
 142                 glm::vec3(13.37123870f, 0.0f, 26.48928486f), point,
 143                 0.00001f // using custom delta since values above are somewhat rounded/truncated
 144         );
 145         ray.origin = glm::vec3(19.995f, 49.952f, 106.515f);
 146         ray.direction = glm::normalize(glm::vec3(-0.046f, -0.477f, -0.878f));
 147         CPPUNIT_ASSERT_MESSAGE(
 148                 "weird ray #2 from interactive testing doesn't intersect :(",
 149                 floor.Intersection(ray, point)
 150         );
 151         AssertEqual(
 152                 "unexpected intersection point",
 153                 glm::vec3(15.17783f, 0.0f, 14.56982f), point,
 154                 0.00001f
 155         );
 156 }
 157
 158 }
 159 }