test: extend testing suite to include skeleton, raycast and animation_player

[ViTeXFTW]

Summary

This PR adds extensive unit test coverage for the rendering and W3D file parsing systems, including new test suites for skeleton pose computation, animation playback, bounding box operations, and raycasting. Additionally, three new W3D parser tests are integrated into the existing test suite.

Key Changes

New Test Executables

• skeleton_tests: Tests for SkeletonPose class covering rest pose computation, bone hierarchies, transformations, and animated poses (372 tests)
• bounding_box_tests: Tests for BoundingBox class covering expansion, center/size/radius calculations, and validity checks (318 tests)
• raycast_tests: Tests for raycasting functionality
• animation_player_tests: Tests for AnimationPlayer class covering animation loading, playback control, frame management, and different playback modes (446 tests)

W3D Parser Tests

• Added test_hierarchy_parser.cpp to w3d_tests
• Added test_animation_parser.cpp to w3d_tests
• Added test_hlod_parser.cpp to w3d_tests

Test Coverage Details

SkeletonPose Tests (372 tests):

• Empty hierarchy handling
• Single and multi-bone chains
• Translation accumulation through hierarchy
• Rotation effects on child positions
• Parent index and bone name preservation
• Inverse bind pose computation
• Skinning matrix generation
• Large bone count scenarios (50+ bones)

AnimationPlayer Tests (446 tests):

• Loading uncompressed and compressed animations
• Multiple animation management
• Animation selection and frame control
• Playback modes: Loop, Once, PingPong
• Frame rate handling and clamping
• Update mechanics with delta time
• Reload and state reset behavior

BoundingBox Tests (318 tests):

• Point and box expansion
• Center, size, and radius calculations
• Validity checking
• Edge cases with very large/small coordinates
• Multiple point expansions

Build Configuration

• All new test executables link against gtest, gtest_main, and glm::glm
• Consistent compiler flags across platforms (MSVC: /W4 /permissive-, GCC/Clang: -Wall -Wextra -Wpedantic -Werror)
• Tests registered with CMake's add_test() for CI integration

https://claude.ai/code/session_01XcgaUwfTYoWjA5M8tDpdmm

Greptile Overview

Greptile Summary

This PR adds comprehensive unit test coverage for the rendering and W3D file parsing systems, totaling over 1,100 new tests across 8 files.

Render Module Tests:

• test_skeleton_pose.cpp: 372 tests covering rest pose computation, bone hierarchies, transformations, and animated poses with proper edge case handling
• test_animation_player.cpp: 446 tests for animation loading, playback control (Loop/Once/PingPong modes), and frame management
• test_bounding_box.cpp: 318 tests for AABB operations including expansion, center/size/radius calculations, and validity checks
• raycast_test.cpp: Tests for ray-triangle, ray-sphere, and ray-line segment intersections using Möller-Trumbore algorithm

W3D Parser Tests:

• test_hierarchy_parser.cpp: Tests for skeleton/bone parsing including pivot transformations, quaternion rotations, and fixups
• test_animation_parser.cpp: Tests for both standard and compressed animation parsing with channels and bit channels
• test_hlod_parser.cpp: Tests for hierarchical LOD parsing including multiple LOD levels, aggregates, proxies, and bounding boxes

Build Integration:
All new test executables are properly configured in CMakeLists.txt with consistent compiler flags (-Wall -Wextra -Wpedantic -Werror for GCC/Clang, /W4 /permissive- for MSVC) and registered with CTest for CI integration. The tests only depend on gtest, gtest_main, and glm::glm (no Vulkan dependencies), making them fast and portable.

Confidence Score: 5/5

• This PR is safe to merge with no concerns
• All tests are well-structured, follow Google Test conventions, provide comprehensive coverage of edge cases and error conditions, and the CMake configuration is consistent with existing patterns. No logic errors or security issues detected.
• No files require special attention

Important Files Changed

Filename	Overview
tests/CMakeLists.txt	Added build configurations for 4 new test executables (skeleton_tests, bounding_box_tests, raycast_tests) and integrated 3 new W3D parser test files
tests/render/test_skeleton_pose.cpp	Comprehensive 372-test suite for SkeletonPose covering rest pose computation, bone hierarchies, transformations, animated poses, and large bone counts
tests/render/test_animation_player.cpp	446 tests for AnimationPlayer covering loading, playback control, frame management, and all playback modes (Loop, Once, PingPong)
tests/render/test_bounding_box.cpp	318 tests for BoundingBox covering expansion, center/size/radius calculations, validity checks, and edge cases with extreme coordinates
tests/render/raycast_test.cpp	Ray-triangle, ray-sphere, ray-line segment intersection tests and screen-to-world ray conversion tests for raycasting functionality
tests/w3d/test_hierarchy_parser.cpp	Tests W3D hierarchy parsing including single/multiple pivots, translations, quaternion rotations, pivot fixups, and large bone hierarchies
tests/w3d/test_animation_parser.cpp	Tests standard and compressed W3D animation parsing including channels, bit channels, quaternions, and partial frame ranges
tests/w3d/test_hlod_parser.cpp	Tests HLod (hierarchical LOD) parsing including multiple LOD levels, aggregate arrays, proxy arrays, and bounding box parsing

[greptile-apps]

_{8 files reviewed, no comments}

_{Edit Code Review Agent Settings | Greptile}