diff options
Diffstat (limited to 'src/tests/test_3d.cc')
| -rw-r--r-- | src/tests/test_3d.cc | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/src/tests/test_3d.cc b/src/tests/test_3d.cc index 90869bf..e0fb2e0 100644 --- a/src/tests/test_3d.cc +++ b/src/tests/test_3d.cc @@ -23,14 +23,14 @@ void test_camera() { assert(near(view.m[14], -10.0f)); // Test Camera::set_look_at - cam.set_look_at({5, 0, 0}, {0, 0, 0}, {0, 1, 0}); // Look at origin from (5,0,0) + cam.set_look_at({5, 0, 0}, {0, 0, 0}, + {0, 1, 0}); // Look at origin from (5,0,0) mat4 view_shifted = cam.get_view_matrix(); - // The camera's forward vector (0,0,-1) should now point towards (-1,0,0) in world space. - // The translation part of the view matrix should be based on -dot(s, eye), -dot(u, eye), dot(f, eye) - // s = (0,0,-1), u = (0,1,0), f = (-1,0,0) - // m[12] = -dot({0,0,-1}, {5,0,0}) = 0 - // m[13] = -dot({0,1,0}, {5,0,0}) = 0 - // m[14] = dot({-1,0,0}, {5,0,0}) = -5 + // The camera's forward vector (0,0,-1) should now point towards (-1,0,0) in + // world space. The translation part of the view matrix should be based on + // -dot(s, eye), -dot(u, eye), dot(f, eye) s = (0,0,-1), u = (0,1,0), f = + // (-1,0,0) m[12] = -dot({0,0,-1}, {5,0,0}) = 0 m[13] = -dot({0,1,0}, {5,0,0}) + // = 0 m[14] = dot({-1,0,0}, {5,0,0}) = -5 assert(near(view_shifted.m[12], 0.0f)); assert(near(view_shifted.m[13], 0.0f)); assert(near(view_shifted.m[14], -5.0f)); @@ -76,22 +76,27 @@ void test_object_transform() { mat4 inv_model_t = model_t.inverse(); // Applying inv_model to a translated point should undo the translation. // Point (5,0,0) should go to (0,0,0) - vec4 translated_point(5,0,0,1); - vec4 original_space_t = inv_model_t * vec4(translated_point.x, translated_point.y, translated_point.z, 1.0); - assert(near(original_space_t.x, 0.0f) && near(original_space_t.y, 0.0f) && near(original_space_t.z, 0.0f)); + vec4 translated_point(5, 0, 0, 1); + vec4 original_space_t = + inv_model_t * + vec4(translated_point.x, translated_point.y, translated_point.z, 1.0); + assert(near(original_space_t.x, 0.0f) && near(original_space_t.y, 0.0f) && + near(original_space_t.z, 0.0f)); // Model matrix with rotation (90 deg Y) and translation (5,0,0) obj.position = vec3(5, 0, 0); obj.rotation = quat::from_axis({0, 1, 0}, 1.570796f); mat4 model_trs = obj.get_model_matrix(); mat4 inv_model_trs = model_trs.inverse(); - // Transform point (1,0,0) (local right) via TRS: Rotates to (0,0,-1), Translates to (5,0,-1) - vec4 p_trs(1,0,0,1); + // Transform point (1,0,0) (local right) via TRS: Rotates to (0,0,-1), + // Translates to (5,0,-1) + vec4 p_trs(1, 0, 0, 1); vec4 transformed_p = model_trs * p_trs; assert(near(transformed_p.x, 5.0f) && near(transformed_p.z, -1.0f)); // Apply inverse to transformed point to get back original point vec4 original_space_trs = inv_model_trs * transformed_p; - assert(near(original_space_trs.x, 1.0f) && near(original_space_trs.y, 0.0f) && near(original_space_trs.z, 0.0f)); + assert(near(original_space_trs.x, 1.0f) && near(original_space_trs.y, 0.0f) && + near(original_space_trs.z, 0.0f)); } void test_scene() { |