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[CORE][FIX] Surface sticking fixed

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Linloir 2022-12-20 08:29:44 +08:00
parent 1e92f8922d
commit 281c424b87
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GPG Key ID: 58EEB209A0F2C366
1 changed files with 6 additions and 7 deletions
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13
FinalProject/sceneviewer.cpp
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@ -567,21 +567,20 @@ void SceneViewer::moveOperatingObject(const Ray& ray) {
// Move the object so that the bottom center of the object is at the hit point
else if (_stickToSurface) {
// Set the bottom center of the model at local origin
glm::vec3 bottomCenter = _operatingObject->boundary().bottomCenterPoint();
glm::vec3 bottomCenter = _operatingObject->modelMatrix() * glm::vec4(_operatingObject->model()->boundBox().bottomCenterPoint(), 1.0f);
glm::vec3 modelCenter = _operatingObject->modelMatrix() * glm::vec4(glm::vec3(0.0f), 1.0f); // model center in world space
// Rotate the model to align with the surface normal
glm::vec3 normal = _hitRecord.normal();
glm::vec3 up = glm::vec3(0.0f, 1.0f, 0.0f);
glm::vec3 axis = glm::cross(up, normal);
float angle = glm::acos(glm::dot(up, normal));
_operatingObject->setRotation(axis, angle);
glm::vec3 axis = glm::normalize(glm::cross(up, normal));
float deg = glm::degrees(glm::acos(glm::dot(up, normal)));
_operatingObject->setRotation(axis, deg);
// Move the model to the hit point
glm::vec3 hitPoint = _hitRecord.position();
glm::vec3 newCenter = hitPoint + normal * (modelCenter.y - bottomCenter.y);
glm::vec3 target = _hitRecord.position();
// Move the model to the new center
glm::vec3 newCenter = target + modelCenter - bottomCenter;
_operatingObject->setPosition(newCenter);
// Update the boundary