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#include "TTT.h"
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/quaternion.hpp>
#include "View.h"
namespace pymol
{
TTT::TTT(glm::vec3 pre, glm::quat rot, glm::vec3 post)
: m_pretranslation{pre}
, m_rotation{rot}
, m_posttranslation{post}
{
}
CViewElem TTT::to_view_elem(const TTT& ttt)
{
CViewElem elem{};
// Rotation Matrix
elem.matrix_flag = true;
auto dp = elem.matrix;
auto ttt_rot = glm::mat4_cast(ttt.getRotation());
auto ttt_rot_ptr = glm::value_ptr(ttt_rot);
std::copy_n(ttt_rot_ptr, 16, dp);
// Pre-translation
elem.pre_flag = true;
dp = elem.pre;
auto pre = -ttt.getPreTranslation();
std::copy_n(glm::value_ptr(pre), 3, dp);
// Post-translation
elem.post_flag = true;
dp = elem.post;
auto post = ttt.getPostTranslation();
std::copy_n(glm::value_ptr(post), 3, dp);
return elem;
}
TTT TTT::from_view_elem(const CViewElem& elem)
{
glm::vec3 pre;
glm::quat rot;
glm::vec3 post;
// Matrix
if (elem.matrix_flag) {
glm::mat4 rotMat;
std::copy_n(elem.matrix, 16, glm::value_ptr(rotMat));
rot = glm::quat_cast(rotMat);
}
// Pre
if (elem.pre_flag) {
pre = -glm::make_vec3(elem.pre);
}
// Post
if (elem.post_flag) {
post = glm::make_vec3(elem.post);
}
return TTT(pre, rot, post);
}
glm::mat4 TTT::getHomogenousMatrix() const
{
glm::mat4 result = glm::mat4_cast(m_rotation);
glm::vec4 trans = m_rotation * glm::vec4(m_pretranslation, 1) +
glm::vec4(m_posttranslation, 1);
return glm::translate(result, glm::vec3(trans));
}
TTT TTT::operator*(const TTT& other) const
{
TTT result;
auto thisHomogenousMat = getHomogenousMatrix();
auto otherHomogenousMat = other.getHomogenousMatrix();
auto mult = otherHomogenousMat * thisHomogenousMat;
result.m_rotation = glm::quat_cast(mult);
auto pre = -m_pretranslation;
result.m_posttranslation = glm::vec3(mult * glm::vec4(pre, 1.0f));
result.m_pretranslation = glm::vec3(mult[3]);
return result;
}
void TTT::translate(const glm::vec3& vec)
{
m_posttranslation += vec;
}
void TTT::translate(const float* vec)
{
translate(glm::make_vec3(vec));
}
void TTT::originate(const glm::vec3& vec)
{
m_posttranslation += m_pretranslation; // reset origin
m_posttranslation += vec;
m_pretranslation = -vec;
}
void TTT::originate(const float* vec)
{
originate(glm::make_vec3(vec));
}
void TTT::rotate(float angRad, const glm::vec3& axis)
{
m_rotation *= glm::angleAxis(angRad, axis);
}
void TTT::setTranslation(const glm::vec3& trans)
{
m_posttranslation = trans;
}
glm::mat4 TTT::as_pymol_2_legacy(const TTT& mat)
{
auto preTranslation = mat.getPreTranslation();
auto rotation = mat.getRotation();
auto postTranslation = mat.getPostTranslation();
glm::mat4 ttt = glm::transpose(glm::mat4_cast(rotation));
ttt[3][0] = preTranslation[0];
ttt[3][1] = preTranslation[1];
ttt[3][2] = preTranslation[2];
ttt[0][3] = postTranslation[0];
ttt[1][3] = postTranslation[1];
ttt[2][3] = postTranslation[2];
return ttt;
}
TTT TTT::from_pymol_2_legacy(const float* ttt)
{
glm::vec3 pretranslate(ttt[12], ttt[13], ttt[14]);
glm::mat4 rot;
auto rot_ptr = glm::value_ptr(rot);
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
rot_ptr[i * 4 + j] = ttt[i * 4 + j];
}
}
glm::vec3 posttranslate(ttt[3], ttt[7], ttt[11]);
return TTT(pretranslate, glm::quat_cast(rot), posttranslate);
}
TTT TTT::rotation_about_with_origin(
float angRad, const glm::vec3& dir, const glm::vec3& origin)
{
return TTT(-origin, glm::angleAxis(angRad, dir), origin);
}
glm::vec3 TTT::transform(const glm::vec3& pos_)
{
auto pos = m_pretranslation + pos_;
return m_rotation * pos + m_posttranslation;
}
void TTT::transform(const float* pos, float* pos_out)
{
auto p = transform(glm::make_vec3(pos));
std::copy_n(glm::value_ptr(p), 3, pos_out);
}
glm::vec3 TTT::transform_vector(const glm::vec3& vec)
{
return m_rotation * vec;
}
void TTT::transform_vector(const float* vec, float* vec_out)
{
auto v = transform_vector(glm::make_vec3(vec));
std::copy_n(glm::value_ptr(v), 3, vec_out);
}
glm::vec3 TTT::getPreTranslation() const
{
return m_pretranslation;
}
glm::vec3 TTT::getPostTranslation() const
{
return m_posttranslation;
}
glm::quat TTT::getRotation() const
{
return m_rotation;
};
void TTT::reset()
{
*this = TTT();
}
TTT lerp(const TTT& a, const TTT& b, float t)
{
return TTT(glm::mix(a.getPreTranslation(), b.getPreTranslation(), t),
glm::slerp(a.getRotation(), b.getRotation(), t),
glm::mix(a.getPostTranslation(), b.getPostTranslation(), t));
}
} // namespace pymol
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