diff options
Diffstat (limited to 'engine/xe_game_object.cpp')
| -rw-r--r-- | engine/xe_game_object.cpp | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/engine/xe_game_object.cpp b/engine/xe_game_object.cpp new file mode 100644 index 0000000..3a59019 --- /dev/null +++ b/engine/xe_game_object.cpp @@ -0,0 +1,64 @@ +#include "xe_game_object.hpp" + +namespace xe { + +glm::mat4 TransformComponent::mat4() { + const float c3 = glm::cos(rotation.z); + const float s3 = glm::sin(rotation.z); + const float c2 = glm::cos(rotation.x); + const float s2 = glm::sin(rotation.x); + const float c1 = glm::cos(rotation.y); + const float s1 = glm::sin(rotation.y); + return glm::mat4{ + { + scale.x * (c1 * c3 + s1 * s2 * s3), + scale.x * (c2 * s3), + scale.x * (c1 * s2 * s3 - c3 * s1), + 0.0f, + }, + { + scale.y * (c3 * s1 * s2 - c1 * s3), + scale.y * (c2 * c3), + scale.y * (c1 * c3 * s2 + s1 * s3), + 0.0f, + }, + { + scale.z * (c2 * s1), + scale.z * (-s2), + scale.z * (c1 * c2), + 0.0f, + }, + {translation.x, translation.y, translation.z, 1.0f} + }; +} + +glm::mat3 TransformComponent::normalMatrix() { + const float c3 = glm::cos(rotation.z); + const float s3 = glm::sin(rotation.z); + const float c2 = glm::cos(rotation.x); + const float s2 = glm::sin(rotation.x); + const float c1 = glm::cos(rotation.y); + const float s1 = glm::sin(rotation.y); + const glm::vec3 invScale = 1.0f/ scale; + + + return glm::mat3{ + { + invScale.x * (c1 * c3 + s1 * s2 * s3), + invScale.x * (c2 * s3), + invScale.x * (c1 * s2 * s3 - c3 * s1), + }, + { + invScale.y * (c3 * s1 * s2 - c1 * s3), + invScale.y * (c2 * c3), + invScale.y * (c1 * c3 * s2 + s1 * s3), + }, + { + invScale.z * (c2 * s1), + invScale.z * (-s2), + invScale.z * (c1 * c2), + } + }; +} + +}
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