bgi_ucs.h

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#pragma once
 
#include "bgi_types.h"
 
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
 
namespace bgi
{
 
    // -------------------------------------------------------------------------
    // Frame construction helpers
    // -------------------------------------------------------------------------
 
    CoordSystem ucsFromNormal(float nx, float ny, float nz,
                              float ox, float oy, float oz);
 
    void ucsOrthonormalise(CoordSystem &cs);
 
    // -------------------------------------------------------------------------
    // Transform matrices
    // -------------------------------------------------------------------------
 
    glm::mat4 ucsLocalToWorldMatrix(const CoordSystem &cs);
 
    glm::mat4 ucsWorldToLocalMatrix(const CoordSystem &cs);
 
    // -------------------------------------------------------------------------
    // Point transforms
    // -------------------------------------------------------------------------
 
    void ucsWorldToLocal(const CoordSystem &cs,
                         float wx, float wy, float wz,
                         float &lx, float &ly, float &lz);
 
    void ucsLocalToWorld(const CoordSystem &cs,
                         float lx, float ly, float lz,
                         float &wx, float &wy, float &wz);
 
    // -------------------------------------------------------------------------
    // World extents helpers
    // -------------------------------------------------------------------------
 
    void worldExtentsExpand(WorldExtents &extents, float x, float y, float z);
 
    glm::vec3 worldExtentsCentre(const WorldExtents &extents);
 
    glm::vec3 worldExtentsHalfSize(const WorldExtents &extents);
 
} // namespace bgi