64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
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#include "xe_game_object.hpp"
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namespace xe {
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glm::mat4 TransformComponent::mat4() {
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const float c3 = glm::cos(rotation.z);
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const float s3 = glm::sin(rotation.z);
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const float c2 = glm::cos(rotation.x);
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const float s2 = glm::sin(rotation.x);
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const float c1 = glm::cos(rotation.y);
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const float s1 = glm::sin(rotation.y);
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return glm::mat4{
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{
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scale.x * (c1 * c3 + s1 * s2 * s3),
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scale.x * (c2 * s3),
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scale.x * (c1 * s2 * s3 - c3 * s1),
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0.0f,
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},
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{
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scale.y * (c3 * s1 * s2 - c1 * s3),
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scale.y * (c2 * c3),
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scale.y * (c1 * c3 * s2 + s1 * s3),
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0.0f,
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},
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{
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scale.z * (c2 * s1),
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scale.z * (-s2),
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scale.z * (c1 * c2),
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0.0f,
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},
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{translation.x, translation.y, translation.z, 1.0f}
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};
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}
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glm::mat3 TransformComponent::normalMatrix() {
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const float c3 = glm::cos(rotation.z);
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const float s3 = glm::sin(rotation.z);
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const float c2 = glm::cos(rotation.x);
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const float s2 = glm::sin(rotation.x);
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const float c1 = glm::cos(rotation.y);
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const float s1 = glm::sin(rotation.y);
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const glm::vec3 invScale = 1.0f/ scale;
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return glm::mat3{
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{
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invScale.x * (c1 * c3 + s1 * s2 * s3),
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invScale.x * (c2 * s3),
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invScale.x * (c1 * s2 * s3 - c3 * s1),
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},
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{
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invScale.y * (c3 * s1 * s2 - c1 * s3),
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invScale.y * (c2 * c3),
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invScale.y * (c1 * c3 * s2 + s1 * s3),
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},
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{
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invScale.z * (c2 * s1),
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invScale.z * (-s2),
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invScale.z * (c1 * c2),
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}
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};
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}
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}
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