[collision] Setup Google Test for cube collision

tests/CMakeLists.txt

@@ -1,4 +1,10 @@
-add_executable(inexor-vulkan-renderer-tests unit_tests_main.cpp)
+set(INEXOR_UNIT_TEST_SOURCE_FILES
+    unit_tests_main.cpp
+
+    world/cube_collision.cpp
+)
+
+add_executable(inexor-vulkan-renderer-tests ${INEXOR_UNIT_TEST_SOURCE_FILES})
 
 set_target_properties(
     inexor-vulkan-renderer-tests PROPERTIES

tests/world/cube_collision.cpp

@@ -1,3 +1,31 @@
-//
-// Created by johannes on 4/17/21.
-//
+#include <gtest/gtest.h>
+
+#include <inexor/vulkan-renderer/world/collision_query.hpp>
+#include <inexor/vulkan-renderer/world/cube.hpp>
+
+namespace inexor::vulkan_renderer {
+
+TEST(CubeCollision, CollisionCheck) {
+    const glm::vec3 world_pos{0, 0, 0};
+    world::Cube world(world::Cube::Type::SOLID, 1.0f, world_pos);
+
+    glm::vec3 cam_pos{0.0f, 0.0f, 10.0f};
+    glm::vec3 cam_direction{0.0f, 0.0f, 0.0f};
+
+    world::OctreeCollisionQuery collision_check(world);
+    auto collision1 = collision_check.check_for_collision(cam_pos, cam_direction);
+    bool collision_found = collision1.has_value();
+
+    // There must be no collision for this data setup.
+    ASSERT_EQ(collision_found, false);
+
+    cam_direction = {0.0f, 0.0f, -1.0f};
+
+    auto collision2 = collision_check.check_for_collision(cam_pos, cam_direction);
+    collision_found = collision2.has_value();
+
+    // Since we are now directly looking down on the cube, we collide with it.
+    ASSERT_EQ(collision_found, true);
+}
+
+}; // namespace inexor::vulkan_renderer