camera.h

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#pragma once
#ifndef AI_CAMERA_H_INC
#define AI_CAMERA_H_INC
 
#ifdef __GNUC__
#   pragma GCC system_header
#endif
 
#include "types.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
// ---------------------------------------------------------------------------
struct aiCamera
{
    C_STRUCT aiString mName;
 
    C_STRUCT aiVector3D mPosition;
 
    C_STRUCT aiVector3D mUp;
 
 
    C_STRUCT aiVector3D mLookAt;
 
    float mHorizontalFOV;
 
    float mClipPlaneNear;
 
    float mClipPlaneFar;
 
    float mAspect;
 
    float mOrthographicWidth;
#ifdef __cplusplus
 
    aiCamera() AI_NO_EXCEPT
        : mUp                (0.f,1.f,0.f)
        , mLookAt            (0.f,0.f,1.f)
        , mHorizontalFOV     (0.25f * (float)AI_MATH_PI)
        , mClipPlaneNear     (0.1f)
        , mClipPlaneFar      (1000.f)
        , mAspect            (0.f)
        , mOrthographicWidth (0.f)
    {}
 
    void GetCameraMatrix (aiMatrix4x4& out) const
    {
        aiVector3D zaxis = mLookAt;     zaxis.Normalize();
        aiVector3D yaxis = mUp;         yaxis.Normalize();
        aiVector3D xaxis = mUp^mLookAt; xaxis.Normalize();
 
        out.a4 = -(xaxis * mPosition);
        out.b4 = -(yaxis * mPosition);
        out.c4 = -(zaxis * mPosition);
 
        out.a1 = xaxis.x;
        out.a2 = xaxis.y;
        out.a3 = xaxis.z;
 
        out.b1 = yaxis.x;
        out.b2 = yaxis.y;
        out.b3 = yaxis.z;
 
        out.c1 = zaxis.x;
        out.c2 = zaxis.y;
        out.c3 = zaxis.z;
 
        out.d1 = out.d2 = out.d3 = 0.f;
        out.d4 = 1.f;
    }
 
#endif
};
 
 
#ifdef __cplusplus
}
#endif
 
#endif // AI_CAMERA_H_INC